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EK-PM38C-MG-002

January 1998

410 pages

Original

2.1MB

Document:	DECstation/DECsystem 5000 Model 200 Series
Order Number:	EK-PM38C-MG
Revision:	002
Pages:	410
Original Filename:

OCR Text

EK-PM38C-MG-002

DECstation/DECsystem
5000 Model 200 Series
Maintenance Guide

digital equipment corporation
maynard, massachusetts

First printing, January 1992
Second printing, April 1993

USA
This equipment generates, uses, and may emit radio frequency energy. The
equipment has been type tested and found to comply with the limits for a Class
A computing device pursuant to Subpart J of Part 15 of FCC Rules, which
are designed to provide reasonable protection against such radio frequency
interference. Operation of this equipment in a residential area may cause
interference in which case the user at his own expense will be required to take
whatever measures may be required to correct the interference.

The following are trademarks of Digital Equipment Corporation:

DEC
DECnet
DECstation
DECsystem
DECUS
MicroVAX
MicroVMS

PDP
ThinWire
TURBOchannel
ULTRIX
ULTRIX-32
UNIBUS
VAX

VAXBI
VAXcluster
VAXstation
VMS
VT

Contents
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xix

Part I Hardware
1 System Overview
System Hardware Configurations . . . . . . . . . . . . . . . . . . . . . . .
System Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External System Unit Connectors . . . . . . . . . . . . . . . . . . .
Internal Base System Module Connectors . . . . . . . . . . . . .
Hardware Options and Peripherals . . . . . . . . . . . . . . . . . . . . .
CPU Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Boot ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitors and Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyboard, Mouse, and Other Pointing Devices . . . . . . . . .
SCSI Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TURBOchannel Option Modules . . . . . . . . . . . . . . . . . . . . .
For Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2
1–4
1–6
1–8
1–10
1–12
1–13
1–13
1–14
1–15
1–16
1–17
1–17
1–17

iii

2 Console Mode and Operating Mode
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To enter console mode . . . . . . . . . . . . . . . . . . . . . . .
Halt button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halt button screen output . . . . . . . . . . . . . . . . . . . .
Operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To enter operating mode . . . . . . . . . . . . . . . . . . . . .
Console Password Management . . . . . . . . . . . . . . . . . . . . . . . .
To Enter the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To Set or Change the Password . . . . . . . . . . . . . . . . . . . . .
To Remove the Requirement for a Password . . . . . . . . . . .
To Erase the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Software Management . . . . . . . . . . . . . . . . . . . . . . . . .
To Boot System Software . . . . . . . . . . . . . . . . . . . . . . . . . . .
To Shut Down System Software . . . . . . . . . . . . . . . . . . . . .
To Access ULTRIX Error Logs . . . . . . . . . . . . . . . . . . . . . .

2–2
2–2
2–2
2–2
2–4
2–4
2–4
2–4
2–5
2–5
2–6
2–6
2–6
2–7
2–8
2–9
2–9

3 Alternate Terminal
Alternate Terminal Settings . . . . . . . . . . . . . . . . . . . . . . . .
To Install the Alternate Terminal . . . . . . . . . . . . . . . . . . . .
To Reactivate the Regular System Monitor and
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1
3–2
3–3

4 General Hardware Service Operations
Antistatic Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Unit Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the System Unit Cover . . . . . . . . . . . . . . . . . . . .
Installing the System Unit Cover . . . . . . . . . . . . . . . . . . . .
Front Cover Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Front Cover Plate . . . . . . . . . . . . . . . . . . . .
Installing the Front Cover Plate . . . . . . . . . . . . . . . . . . . . .
Serial Number Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Serial Number Plate . . . . . . . . . . . . . . . . . .
Installing the Serial Number Plate . . . . . . . . . . . . . . . . . .
Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Nameplate Medallion . . . . . . . . . . . . . . . . .
Installing the Nameplate Medallion . . . . . . . . . . . . . . . . . .
Adapters, Terminators, and Loopback Connectors . . . . . . . . .

4–2
4–4
4–4
4–4
4–5
4–5
4–6
4–7
4–7
4–7
4–9
4–9
4–9
4–10

Serial Line Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a serial line adapter . . . . . . . . . . . . . . . .
Removing a serial line adapter . . . . . . . . . . . . . . . .
SCSI Controller Terminator . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a SCSI controller terminator . . . . . . . . .
Removing a SCSI controller terminator . . . . . . . . .
SCSI Chain Terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a SCSI chain terminator . . . . . . . . . . . .
Removing a SCSI chain terminator . . . . . . . . . . . .
ThickWire Ethernet Loopback Connector . . . . . . . . . . . . .
Installing a ThickWire Ethernet loopback
connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a ThickWire Ethernet loopback
connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Line Loopback Connector . . . . . . . . . . . . . . . . . . . . .
Installing a serial line loopback connector . . . . . .
Removing a serial line loopback connector . . . . . .

4–11
4–11
4–11
4–12
4–12
4–12
4–13
4–13
4–13
4–14
4–14
4–14
4–15
4–15
4–15

5 Electronic Component Service Operations
Base System Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To Install the Base System Module and Chassis . . . . . . .
Base System ESAR Chip . . . . . . . . . . . . . . . . . . . . . . . . . . .
To remove the base system ESAR chip . . . . . . . . .
To install the base system ESAR chip . . . . . . . . . .
CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU Module Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Slot Numbers and Address Ranges . . . . . . . . . . .
Removing a SIMM Module . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a SIMM Module . . . . . . . . . . . . . . . . . . . . . . . . . .
NVRAM Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . .
To Install the Power Supply . . . . . . . . . . . . . . . . . . . . . . . .
TURBOchannel Option Modules . . . . . . . . . . . . . . . . . . . . . . . .
To Remove an Option Module . . . . . . . . . . . . . . . . . . . . . . .
Installing an Option Module . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Option Module ESAR Chip . . . . . . . . . . . . . . . . .
For Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–2
5–4
5–7
5–7
5–7
5–9
5–9
5–12
5–12
5–14
5–16
5–18
5–18
5–19
5–20
5–22
5–23
5–26
5–26
5–27
5–28
5–30

6 Storage Drives
SCSI Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI Cable Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–2
6–3
6–4

7 Keyboards and Pointing Devices
Keyboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mouse or Tablet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and Installing Input Devices . . . . . . . . . . . . . . . . . .
To Remove the Keyboard, Mouse, and Cable . . . . . . . . . .
To Install the Keyboard, Mouse, and Cable . . . . . . . . . . .
LPFK and PFD Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7–2
7–3
7–4
7–4
7–4
7–6

Part II Troubleshooting
8 Troubleshooting Overview
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environment Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tests and Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8–1
8–2
8–3
8–3
8–4
8–4
8–5
8–5

9 Troubleshooting Information
LED Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic LED Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detailed Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Test Error Messages . . . . . . . . . . . . . . . . . . . . . . .

9–2
9–2
9–2
9–2
9–4
9–5
9–6
9–9
9–9
9–13

Console Exception Messages . . . . . . . . . . . . . . . . . . . . . . . .
Example: Console Exception Message (R3000) . . .
Example: Console Exception Message (R4000) . . .
Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slot Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware Physical Addresses . . . . . . . . . . . . . . . . . . . . . . .
ULTRIX Error Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Examining Error Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ULTRIX Error Log Format . . . . . . . . . . . . . . . . . . . . . . . . .
ULTRIX Error Log Event Types . . . . . . . . . . . . . . . . . . . . .
Memory Error Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory error log example 1 . . . . . . . . . . . . . . . . . .
Memory error log example 2 . . . . . . . . . . . . . . . . . .
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9–14
9–15
9–15
9–16
9–16
9–17
9–18
9–20
9–20
9–21
9–23
9–24
9–24
9–27
9–28
9–28

10 Troubleshooting Tools
Console Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternate Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slot Numbers in Test Commands and Error Messages . .
Power-Up Self-Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console Mode Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the t Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To display a list of available tests . . . . . . . . . . . . .
Common Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI controller (cntl) test . . . . . . . . . . . . . . . . . . . .
SCSI send diagnostics (sdiag) test . . . . . . . . . . . . .
Ethernet external loopback test . . . . . . . . . . . . . . .
SCC transmit and receive test . . . . . . . . . . . . . . . .
SCC pins test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To Display a List of Available Scripts . . . . . . . . . . . . . . . .
To Display the Contents of a Script . . . . . . . . . . . . . . . . . .
To Create a Test Script . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10–2
10–2
10–2
10–3
10–5
10–6
10–6
10–8
10–9
10–9
10–9
10–10
10–10
10–10
10–11
10–12
10–13
10–14

vii

11 Troubleshooting Procedures
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Up Self-Test Does Not Complete . . . . . . . . . . . . . . . . . .
Troubleshooting With LED Codes . . . . . . . . . . . . . . . . . . . . . . .
Monitor Has No Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When an Error Message Appears on the Monitor . . . . . . . . .
Test Exception Messages . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When a Console Exception Occurs . . . . . . . . . . . . . . . . . . . . . .
Example: Console Exception Message . . . . . . . . . . . . . . . .
When Hardware Does Not Appear in the cnfg Display . . . . .
Troubleshooting the Memory Modules . . . . . . . . . . . . . . . . . . .
Troubleshooting SCSI Devices . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting an Ethernet Controller . . . . . . . . . . . . . . . . .
Troubleshooting a Printer, Modem, or Other Serial Line
Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the Power Supply . . . . . . . . . . . . . . . . . . . . . .
When the System Unit Overheats . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the Keyboard and Mouse . . . . . . . . . . . . . . . .
When ULTRIX Is Running but the Monitor Has No
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting with ULTRIX Error Logs . . . . . . . . . . . . . . .

11–6
11–8
11–9
11–17
11–19
11–19
11–20
11–21
11–22
11–25
11–28
11–29
11–31
11–33
11–35
11–36
11–37
11–39
11–42

Part III Appendices
A Equipment Specifications
DECstation 5000 Model 240 System Unit Equipment
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DECstation 5000 Model 260 System Unit Equipment
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LK401-AA Keyboard Equipment Specifications . . . . . . . . . . .
VSXXX-GA Mouse Equipment Specifications . . . . . . . . . . . . .
VSXXX-AB Tablet Equipment Specifications . . . . . . . . . . . . .
BA42 Storage Expansion Box Equipment Specifications . . . .
RZ23L SCSI Hard Disk Drive Equipment Specifications . . .
RZ24L SCSI Hard Disk Drive Equipment Specifications . . .
RZ25 SCSI Hard Disk Drive Equipment Specifications . . . .
RZ26 SCSI Hard Disk Drive Equipment Specifications . . . .
RZ58 SCSI Hard Disk Drive Equipment Specifications . . . .
TK50Z Tape Drive Equipment Specifications . . . . . . . . . . . . .
TZ30 Tape Drive Equipment Specifications . . . . . . . . . . . . . . .

viii

A–2
A–3
A–4
A–6
A–8
A–10
A–11
A–13
A–15
A–17
A–18
A–20
A–22

TZ85 Tape Drive Equipment Specifications . . . . . . . . . . . . . . .
TZK10 QIC Tape Drive Equipment Specifications . . . . . . . . .
TLZ04 Cassette Tape Drive Equipment Specifications . . . . .
TLZ06 Cassette Tape Drive Equipment Specifications . . . . .
RRD42 Compact Disc Drive Equipment Specifications . . . . .
RX23 Diskette Drive Equipment Specifications . . . . . . . . . . .
RX33 Diskette Drive Equipment Specifications . . . . . . . . . . .

A–24
A–25
A–27
A–28
A–29
A–30
A–32

B Part Numbers
C Console Commands
Using This Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions Used in This Appendix . . . . . . . . . . . . . . . . .
Some Terms Used in This Appendix . . . . . . . . . . . . . . . . .
Rules for entering console commands . . . . . . . . . . . . . . . .
Console Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console Command Format Summary . . . . . . . . . . . . . . . . .
? Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
boot Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Important information about the boot
command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
cat Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
cnfg Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General system configuration displays . . . . . . . . . .
Base system configuration displays . . . . . . . . . . . .
Ethernet controller configuration displays . . . . . .
SCSI controller displays . . . . . . . . . . . . . . . . . . . . . .
Color frame buffer graphics module configuration
displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2D graphics accelerator module configuration
displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3D graphics module configuration displays . . . . . .
d Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
e Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
erl Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
go Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
init Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ls Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
passwd Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
printenv Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
restart Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
script Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C–2
C–2
C–2
C–3
C–4
C–5
C–7
C–7
C–8
C–9
C–10
C–10
C–12
C–14
C–15
C–16
C–17
C–17
C–19
C–20
C–21
C–21
C–22
C–22
C–23
C–24
C–24
C–24

setenv Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
sh Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
t Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
test Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
unsetenv Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console Command Error Messages . . . . . . . . . . . . . . . . . . . . .

C–25
C–27
C–28
C–28
C–29
C–29

D Base System Test Commands and Messages
Locating Individual Tests in This Appendix . . . . . . . . . . . . . .
Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
cache/data - Cache Data Test . . . . . . . . . . . . . . . . . . . . . . .
cache/fill - Cache Fill Test . . . . . . . . . . . . . . . . . . . . . . . . . .
cache/isol - Cache Isolate Test . . . . . . . . . . . . . . . . . . . . . . .
cache/reload - Cache Reload Test . . . . . . . . . . . . . . . . . . . .
cache/seg - Cache Segment Test . . . . . . . . . . . . . . . . . . . . .
ecc/cor - ECC Correction Test . . . . . . . . . . . . . . . . . . . . . . .
fpu - Floating-Point Unit Test . . . . . . . . . . . . . . . . . . . . . . .
mem - Memory Module Test . . . . . . . . . . . . . . . . . . . . . . . .
mem/float10 - Floating 1/0 Memory Test . . . . . . . . . . . . . .
mem/init - Zero Memory Utility . . . . . . . . . . . . . . . . . . . . .
mem/select - RAM Select Lines Test . . . . . . . . . . . . . . . . .
misc/cpu-type - CPU-Type Utility . . . . . . . . . . . . . . . . . . . .
misc/halt - Halt Button Test . . . . . . . . . . . . . . . . . . . . . . . .
misc/kbd - Keyboard Test . . . . . . . . . . . . . . . . . . . . . . . . . . .
misc/mouse - Mouse Test . . . . . . . . . . . . . . . . . . . . . . . . . . .
misc/pstemp - Overheat Detect Test . . . . . . . . . . . . . . . . . .
misc/wbpart - Partial Write Test . . . . . . . . . . . . . . . . . . . . .
ni/cllsn - Collision Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ni/common - Common Diagnostic Utilities . . . . . . . . . . . .
ni/crc - Cyclic Redundancy Code Test . . . . . . . . . . . . . . . . .
ni/ctrs - Display MOP Counters Utility . . . . . . . . . . . . . . .
ni/dma1 - Ethernet-Direct Memory Access Registers
Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ni/dma2 - Ethernet-Direct Memory Access Transfer
Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ni/esar - Ethernet Station Address ROM Test . . . . . . . . .
ni/ext-lb - External Loopback Test . . . . . . . . . . . . . . . . . . .
ni/int - Interrupt Request Test . . . . . . . . . . . . . . . . . . . . . .
ni/int-lb - Internal Loopback Test . . . . . . . . . . . . . . . . . . . .
ni/m-cst - Multicast Test . . . . . . . . . . . . . . . . . . . . . . . . . . .
ni/promisc - Promiscuous Mode Test . . . . . . . . . . . . . . . . .
ni/regs - Registers Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
prcache - Prcache Quick Test . . . . . . . . . . . . . . . . . . . . . . .

D–2
D–6
D–6
D–8
D–10
D–12
D–14
D–16
D–17
D–19
D–20
D–21
D–21
D–22
D–23
D–24
D–26
D–27
D–27
D–29
D–30
D–31
D–33
D–33
D–35
D–37
D–38
D–39
D–41
D–43
D–45
D–47
D–49

prcache/arm - Disconnect Battery . . . . . . . . . . . . . . . . . . . .
prcache/clear - Zero NVRAM Memory . . . . . . . . . . . . . . . .
prcache/unarm - Connect battery . . . . . . . . . . . . . . . . . . . .
rtc/nvr - Nonvolatile RAM Test . . . . . . . . . . . . . . . . . . . . . .
rtc/period - Real-Time Clock Period Test . . . . . . . . . . . . . .
rtc/regs - Real-Time Clock Registers Test . . . . . . . . . . . . .
rtc/time - Real-Time Test . . . . . . . . . . . . . . . . . . . . . . . . . . .
scache/data - Secondary Cache Test . . . . . . . . . . . . . . . . . .
scc/access - Serial Communication Chip Access Test . . . .
scc/dma - Serial Communication Chip Direct Memory
Access Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
scc/int - Serial Communication Chip Interrupts Test . . .
scc/io - Serial Communication Chip I/O Test . . . . . . . . . . .
scc/pins - Serial Communication Chip Pins Test . . . . . . .
scc/tx-rx - Serial Communication Chip Transmit and
Receive Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
scsi/cntl - SCSI Controller Test . . . . . . . . . . . . . . . . . . . . . .
scsi/sdiag - SCSI Send Diagnostics Test . . . . . . . . . . . . . .
scsi/target - SCSI Target Test . . . . . . . . . . . . . . . . . . . . . . .
tlb/prb - Translation Lookaside Buffer Probe Test . . . . . .
tlb/reg - Translation Lookaside Buffer Registers Test . . .
Diagnostic LED Array Codes . . . . . . . . . . . . . . . . . . . . . . . . . . .

D–50
D–51
D–51
D–52
D–53
D–54
D–55
D–56
D–57
D–57
D–60
D–61
D–63
D–66
D–69
D–70
D–71
D–74
D–75
D–76

E CPU and System Registers
CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU Registers for R4000 Only . . . . . . . . . . . . . . . . . . . . . .
Cause Register (R3000 Only) . . . . . . . . . . . . . . . . . . . . . . .
Cause Register (R4000 Only) . . . . . . . . . . . . . . . . . . . . . . .
Exception Program Counter (EPC) Register (R3000 and
R4000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status Register (R3000 Only) . . . . . . . . . . . . . . . . . . . . . . .
Status Register (R4000 Only) . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Status Field . . . . . . . . . . . . . . . . . . . . . .
BadVAddr Register (R3000 and R4000) . . . . . . . . . . . . . . .
Error Exception Program Counter (Error EPC)(R4000
Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Register (R4000 Only) . . . . . . . . . . . . . . . . .
System Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Buffers 3 to 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Support Register (SSR) . . . . . . . . . . . . . . . . . . . . .
System Interrupt Register (SIR) . . . . . . . . . . . . . . . . . . . . .
System Interrupt Mask Register . . . . . . . . . . . . . . . . . . . .
Error Address Register (EAR) . . . . . . . . . . . . . . . . . . . . . . .

E–2
E–4
E–5
E–6
E–8
E–9
E–11
E–12
E–13
E–14
E–14
E–16
E–16
E–17
E–21
E–27
E–28

Error Syndrome Register (ES) . . . . . . . . . . . . . . . . . . . . . .
Control Register (CS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECC logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E–31
E–34
E–36

F Connector Pin Assignments
Index
Figures
1-1
1-2
1-3
1-4
1-5
1-6
2-1
3-1
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9

xii

DECstation 5000 Model 240 & 260 functional areas . . . . . . . .
System unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls and indicators on the system unit . . . . . . . . . . . . . . .
External system unit connectors . . . . . . . . . . . . . . . . . . . . . . . . .
Internal base system module connectors . . . . . . . . . . . . . . . . . .
System Rom Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clear-NVR jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternate terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to use the antistatic kit . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System unit cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front cover plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial number plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial line adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI controller terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI chain terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ThickWire Ethernet loopback connector . . . . . . . . . . . . . . . . . .
Serial line loopback connector . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base system module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and installing the base system module . . . . . . . . . .
Base system ESAR Chip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R3000 CPU module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R4000 CPU module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and installing a CPU module . . . . . . . . . . . . . . . . . .
SIMM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory module slot numbers . . . . . . . . . . . . . . . . . . . . . . . . . . .
NVRAM module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–3
1–5
1–7
1–9
1–11
1–14
2–7
3–4
4–3
4–5
4–6
4–8
4–10
4–11
4–12
4–13
4–14
4–15
5–3
5–5
5–8
5–10
5–11
5–13
5–15
5–17
5–19

5-10
5-11
5-12
5-13
5-14
5-15
5-16
7-1
7-2
7-3
10-1
11-1
11-2
11-3
11-4
11-5
11-6
11-7
11-8
11-9
11-10
11-11
11-12
11-13
11-14
11-15
11-16
11-17
11-18
11-19
11-20

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power supply connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power supply fan assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and installing the power supply . . . . . . . . . . . . . . . .
Finger Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and installing a TURBOchannel option module . . .
Ethernet option module ESAR chip . . . . . . . . . . . . . . . . . . . . . .
Keyboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mouse and tablet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and installing a keyboard and mouse . . . . . . . . . . .
Slot numbers for system hardware . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting guide, 1 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting guide, 2 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When the LED display is 1111 1111 (FF), 0011 1111 (3F), or
0011 0101 (35) 1 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When the LED display is 1111 1111 (FF), 0011 1111 (3F), or
0011 0101 (35) 2 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When the LED display is 1111 1111 (FF), 0011 1111 (3F), or
0011 0101 (35) 3 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When the LED display is 0011 1110 (3E), 0011 1101 (3D), or
0011 0111 (37), or 0011 0011 (33) . . . . . . . . . . . . . . . . . . . . . . . .
When the LED display is 0011 0110 (36) . . . . . . . . . . . . . . . . .
When the LED display is 0010 0010 (22), 0001 0010 (12),
0000 0010 (02), 0010 0011 (23), 0001 0011 (13), or 0000 0011
(03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When the LED display is 0011 1011 (3B), 0010 1011 (2B),
0001 1011 (1B), or 0000 1011 (0B), 1 of 2 . . . . . . . . . . . . . . . . .
When the LED display is 0011 1011 (3B), 0010 1011 (2B),
0001 1011 (1B), or 0000 1011 (0B), 2 of 2 . . . . . . . . . . . . . . . . .
When the monitor has no display, 1 of 2 . . . . . . . . . . . . . . . . . .
When the monitor has no display, 2 of 2 . . . . . . . . . . . . . . . . . .
When hardware does not appear in cnfg display, 1 of 3 . . . . .
When hardware does not appear in cnfg display, 2 of 3 . . . . .
When hardware does not appear in cnfg display, 3 of 3 . . . . .
Troubleshooting memory modules . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting SCSI devices 1 of 2 . . . . . . . . . . . . . . . . . . . . .
Troubleshooting SCSI devices 2 of 2 . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Ethernet controller, 1 of 2 . . . . . . . . . . . . . . . .
Troubleshooting Ethernet controller, 2 of 2 . . . . . . . . . . . . . . . .

5–20
5–21
5–22
5–24
5–25
5–28
5–29
7–2
7–3
7–5
10–4
11–6
11–7
11–9
11–10
11–11
11–12
11–13
11–14
11–15
11–16
11–17
11–18
11–25
11–26
11–27
11–28
11–29
11–30
11–31
11–32

xiii

11-21 Troubleshooting a printer, modem, or other serial line device,
1 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-22 Troubleshooting a printer, modem, or other serial line device,
2 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-23 Troubleshooting the power supply . . . . . . . . . . . . . . . . . . . . . . .
11-24 When the system unit overheats . . . . . . . . . . . . . . . . . . . . . . . .
11-25 Troubleshooting the keyboard and mouse, 1 of 2 . . . . . . . . . . .
11-26 Troubleshooting the keyboard and mouse, 2 of 2 . . . . . . . . . . .
11-27 Troubleshooting when ULTRIX is running, but the monitor
has no display, 1 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-28 Troubleshooting when ULTRIX is running, but the monitor
has no display, 2 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-29 Troubleshooting when ULTRIX is running, but the monitor
has no display, 3 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-1
DECstation 5000 Model 240 major FRUs . . . . . . . . . . . . . . . . .
B-2
DECstation 5000 Model 260 major FRUs . . . . . . . . . . . . . . . . .

11–33
11–34
11–35
11–36
11–37
11–38
11–39
11–40
11–41
B–2
B–3

Tables
1
3-1
5-1
5-2
6-1
9-1
9-2
9-3
9-4
9-5
9-6
10-1
11-1
A-1
A-2
A-3
A-4
A-5
A-6
A-7
A-8
xiv

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternate Terminal Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU Module Upgrade Kit Components . . . . . . . . . . . . . . . . . . .
Memory Module Address Ranges . . . . . . . . . . . . . . . . . . . . . . . .
SCSI Cable Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base System Test Error Messages . . . . . . . . . . . . . . . . . . . . . . .
Slot Numbers in Commands and Messages . . . . . . . . . . . . . . .
Memory Module Address Ranges . . . . . . . . . . . . . . . . . . . . . . . .
Hardware Physical Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Log Event Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slot Numbers in Test Commands . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Unit Operating Conditions . . . . . . . . . . . . . . . . . . . . . . .
System Unit Nonoperating Conditions . . . . . . . . . . . . . . . . . . . .
System Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Unit Operating Conditions . . . . . . . . . . . . . . . . . . . . . . .
System Unit Nonoperating Conditions . . . . . . . . . . . . . . . . . . . .
LK401-AA Keyboard Description . . . . . . . . . . . . . . . . . . . . . . . .
LK401-AA Keyboard Operating Conditions . . . . . . . . . . . . . . . .

xxi
3–2
5–9
5–16
6–3
9–3
9–10
9–16
9–18
9–18
9–23
10–7
11–2
A–2
A–2
A–2
A–3
A–3
A–3
A–4
A–5

A-9
A-10
A-11
A-12
A-13
A-14
A-15
A-16
A-17
A-18
A-19
A-20
A-21
A-22
A-23
A-24
A-25
A-26
A-27
A-28
A-29
A-30
A-31
A-32
A-33
A-34
A-35
A-36
A-37
A-38
A-39
A-40
A-41
A-42
A-43
A-44
A-45
A-46

LK401-AA Keyboard Nonoperating Conditions . . . . . . . . . . . . .
VSXXX-GA Mouse Description . . . . . . . . . . . . . . . . . . . . . . . . . .
VSXXX-GA Mouse Operating Conditions . . . . . . . . . . . . . . . . .
VSXXX-GA Mouse Nonoperating Conditions . . . . . . . . . . . . . .
VSXXX-AB Tablet Description . . . . . . . . . . . . . . . . . . . . . . . . . .
VSXXX-AB Tablet Operating Conditions . . . . . . . . . . . . . . . . . .
VSXXX-AB Tablet Nonoperating Conditions . . . . . . . . . . . . . . .
BA42 Storage Expansion Box Description . . . . . . . . . . . . . . . . .
BA42 Storage Expansion Box Operating Conditions . . . . . . . .
BA42 Storage Expansion Box Nonoperating Conditions . . . . .
RZ23L SCSI Hard Disk Drive Description . . . . . . . . . . . . . . . .
RZ23L SCSI Hard Disk Drive Operating Conditions . . . . . . . .
RZ23L SCSI Hard Disk Drive Nonoperating Conditions . . . . .
RZ24L SCSI Hard Disk Drive Description . . . . . . . . . . . . . . . .
RZ24L SCSI Hard Disk Drive Operating Conditions . . . . . . . .
RZ24L SCSI Hard Disk Drive Nonoperating Conditions . . . . .
RZ25 SCSI Hard Disk Drive Description . . . . . . . . . . . . . . . . .
RZ25 SCSI Hard Disk Drive Operating Conditions . . . . . . . . .
RZ25 SCSI Hard Disk Drive Nonoperating Conditions . . . . . .
RZ26 SCSI Hard Disk Drive Description . . . . . . . . . . . . . . . . .
RZ26 SCSI Hard Disk Drive Operating Conditions . . . . . . . . .
RZ26 SCSI Hard Disk Drive Nonoperating Conditions . . . . . .
RZ58 SCSI Hard Disk Drive Description . . . . . . . . . . . . . . . . .
RZ58 SCSI Hard Disk Drive Operating Conditions . . . . . . . . .
RZ58 SCSI Hard Disk Drive Nonoperating Conditions . . . . . .
TK50Z Tape Drive Description . . . . . . . . . . . . . . . . . . . . . . . . . .
TK50Z Tape Drive Operating Conditions . . . . . . . . . . . . . . . . .
TK50Z Tape Drive Nonoperating Conditions . . . . . . . . . . . . . .
TZ30 Tape Drive Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TZ30 Tape Drive Operating Conditions . . . . . . . . . . . . . . . . . . .
TZ30 Tape Drive Nonoperating Conditions . . . . . . . . . . . . . . . .
TZ85 Tape Drive Description (Table Top) . . . . . . . . . . . . . . . . .
TZ85 Tape Drive Operating Conditions (including media) . . .
TZ85 Tape Drive Nonoperating Conditions (excluding
media) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TZK10 QIC Tape Drive Description . . . . . . . . . . . . . . . . . . . . . .
TZK10 QIC Tape Drive Operating Conditions . . . . . . . . . . . . .
TZK10 QIC Tape Drive Nonoperating Conditions . . . . . . . . . .
TLZ04 Cassette Tape Drive Description . . . . . . . . . . . . . . . . . .

A–5
A–6
A–7
A–7
A–8
A–9
A–9
A–10
A–10
A–10
A–11
A–12
A–12
A–13
A–14
A–14
A–15
A–16
A–16
A–17
A–17
A–17
A–18
A–19
A–19
A–20
A–21
A–21
A–22
A–23
A–23
A–24
A–24
A–24
A–25
A–26
A–26
A–27

A-47
A-48
A-49
A-50
A-51
A-52
A-53
A-54
A-55
A-56
A-57
A-58
A-59
A-60
A-61
B-1
B-2
B-3
B-4
B-5
B-6
B-7
B-8
B-9
B-10
C-1
C-2
C-3
D-1
D-2
D-3
D-4
D-5
D-6
D-7
D-8
D-9
D-10
D-11

xvi

TLZ04 Cassettte Tape Drive Operating Conditions . . . . . . . . .
TLZ04 Cassette Tape Drive Nonoperating Conditions . . . . . . .
TLZ06 Cassette Tape Drive Description . . . . . . . . . . . . . . . . . .
TLZ06 Cassettes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TLZ06 Cassettte Tape Drive Operating Conditions . . . . . . . . .
TLZ06 Cassette Tape Drive Nonoperating Conditions . . . . . . .
RRD42 Compact Disc Drive Description . . . . . . . . . . . . . . . . . .
RRD42 Compact Disc Drive Operating Conditions . . . . . . . . .
RRD42 Compact Disc Drive Nonoperating Conditions . . . . . .
RX23 Diskette Drive Description . . . . . . . . . . . . . . . . . . . . . . . .
RX23 Diskette Drive Operating Conditions . . . . . . . . . . . . . . .
RX23 Diskette Drive Nonoperating Conditions . . . . . . . . . . . .
RX33 Diskette Drive Description . . . . . . . . . . . . . . . . . . . . . . . .
RX33 Diskette Drive Operating Conditions . . . . . . . . . . . . . . .
RX33 Diskette Drive Nonoperating Conditions . . . . . . . . . . . .
Part Numbers: Basic System Components . . . . . . . . . . . . . . . .
Part Numbers: SCSI Hardware . . . . . . . . . . . . . . . . . . . . . . . . .
Part Numbers: TURBOchannel Option Modules . . . . . . . . . . .
Part Numbers: Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Numbers: Input Devices . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Numbers: Cords and Cables . . . . . . . . . . . . . . . . . . . . . . . .
Part Numbers: Connectors, Adapters, and Terminators . . . . .
Part Numbers: Small Hardware . . . . . . . . . . . . . . . . . . . . . . . .
Part Numbers: Software Documentation . . . . . . . . . . . . . . . . .
Part Numbers: Hardware Documentation . . . . . . . . . . . . . . . .
Console Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environment Variables for setenv Command . . . . . . . . . . . . . .
Console Command Error Messages . . . . . . . . . . . . . . . . . . . . . .
Base System Module Test and Utilities . . . . . . . . . . . . . . . . . . .
Cache Data Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cache Fill Test Error Descriptions . . . . . . . . . . . . . . . . . . . . . . .
Cache Isolate Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . .
Cache Reload Test Error Descriptions . . . . . . . . . . . . . . . . . . . .
Cache Segment Test Error Codes and Descriptions . . . . . . . . .
ECC Test Error Codes and Descriptions . . . . . . . . . . . . . . . . . .
FPU Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyboard Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mouse Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Partial Write Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . .

A–27
A–27
A–28
A–28
A–28
A–28
A–29
A–29
A–29
A–30
A–31
A–31
A–32
A–33
A–33
B–4
B–4
B–5
B–7
B–8
B–9
B–10
B–10
B–11
B–12
C–5
C–25
C–29
D–2
D–7
D–9
D–11
D–13
D–15
D–16
D–18
D–25
D–27
D–28

D-12
D-13
D-14
D-15
D-16
D-17
D-18
D-19
D-20
D-21
D-22
D-23
D-24
D-25
D-26
D-27
D-28
D-29
D-30
D-31
D-32
D-33
D-34
D-35
D-36
D-37
E-1
E-2
E-3
E-4
E-5
E-6
E-7
E-8
E-9
E-10

Collision Test Error Codes and Descriptions . . . . . . . . . . . . . . .
Common Diagnostic Utility Error Codes and Descriptions . . .
CRC Test Error Codes and Descriptions . . . . . . . . . . . . . . . . . .
Ethernet-DMA Registers Test Error Codes and
Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet-DMA Registers Test Error Codes and
Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ESAR Test Error Codes and Descriptions . . . . . . . . . . . . . . . . .
External Loopback Test Error Codes and Descriptions . . . . . .
IRQ Test Error Codes and Descriptions . . . . . . . . . . . . . . . . . . .
Internal Loopback Test Error Codes and Descriptions . . . . . .
Multicast Test Error Codes and Descriptions . . . . . . . . . . . . . .
Promiscuous Mode Test Error Codes and Descriptions . . . . . .
Registers Test Error Codes and Descriptions . . . . . . . . . . . . . .
Prcache Quick Test Error Codes and Descriptions . . . . . . . . . .
RTC Period Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . .
Real-Time Clock Register Test Error Codes . . . . . . . . . . . . . . .
Real-Time Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCC DMA Test Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCC I/O Test Error Codes and Descriptions . . . . . . . . . . . . . . .
Pin Pairs Tested by Individual Loopback Connectors . . . . . . .
SCC Pins Test Error Codes and Descriptions . . . . . . . . . . . . . .
SCC Transmit and Receive Test Error Codes and
Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI Controller Error Codes and Descriptions . . . . . . . . . . . . .
SCSI Send Diagnostics Test Error Descriptions . . . . . . . . . . . .
SCSI Target Test Error Codes and Descriptions . . . . . . . . . . .
TLB Registers Test Error Descriptions . . . . . . . . . . . . . . . . . . .
Power-Up LED Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R3000A CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R4000 CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exception Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exception Codes R4000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Status Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Config Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Support Register 0xBF840100 . . . . . . . . . . . . . . . . . . . .
LEDs Controlled by SSR LEDS Register Bits . . . . . . . . . . . . .
System Interrupt Register 0xBF840110 . . . . . . . . . . . . . . . . . . .

D–29
D–31
D–32
D–34
D–36
D–37
D–39
D–40
D–42
D–44
D–46
D–48
D–50
D–53
D–54
D–55
D–59
D–62
D–64
D–65
D–68
D–69
D–71
D–72
D–75
D–76
E–2
E–4
E–6
E–7
E–13
E–15
E–16
E–17
E–20
E–21

xvii

E-11
E-12
E-13
E-14
E-15
E-16
E-17
F-1
F-2
F-3
F-4
F-5
F-6
F-7
F-8

xviii

System Interrupt Mask Register 0xBF840120 . . . . . . . . . . . . .
Error Address Register 0xBFA40000 . . . . . . . . . . . . . . . . . . . . .
EA Error Log Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Syndrome Register 0xBFA80000 . . . . . . . . . . . . . . . . . . .
Control Register 0xBFAC0000 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Participating Data Bits in Check Bit Calculation . . . . . . . . . .
Syndrome Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI Cable Connector Pin Assignments . . . . . . . . . . . . . . . . . .
Keyboard and Mouse or Tablet Connector Pin
Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Communications Connectors Pin Assignments . . . . . . .
ThickWire Ethernet Connector Pin Assignments . . . . . . . . . . .
Power Supply Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . .
Modem Loopback Connector Pin Assignments . . . . . . . . . . . . .
Ethernet Loopback Connector Pin Assignments . . . . . . . . . . . .
Summary of Loopback Connectors . . . . . . . . . . . . . . . . . . . . . . .

E–27
E–28
E–30
E–31
E–34
E–36
E–37
F–2
F–3
F–4
F–5
F–5
F–6
F–6
F–6

About This Guide

Intended Audience
This guide is for Digital customer service representatives who
have completed training in DECstation 5000 Model 240 and
260 maintenance. This guide assumes that you are familiar
with basic maintenance and troubleshooting operations and
that you have experience with desktop computer systems.

How To Use This Guide
This guide explains how to identify and replace failed fieldreplaceable units (FRUs). Part I describes the FRUs and how
to remove and install them. Part II describes the messages,
tests, and procedures used when troubleshooting the system.
Part III provides reference information.
For an overview of the system hardware and its configurations,
see Chapter 1, ‘‘System Overview.’’
For information about console mode, used for maintenance
operations and operating mode, used for regular software
operations, see Chapter 2, ‘‘Console Mode and Operating Mode.’’
To install an alternate terminal as the console when the regular
monitor is inoperative, see Chapter 3, ‘‘Alternate Terminal.’’

xix

Replacement procedures for non-electronic hardware,
are contained in Chapter 4, ‘‘General Hardware Service
Operations.’’
See Chapter 5, ‘‘Electronic Component Service Operations,’’ for
replacement procedures for electronic components.
For information about using small computer system interface
(SCSI) storage drives, see Chapter 5, ‘‘Electronic Component
Service Operations.’’
The keyboard and pointing devices, including the mouse and
tablet, are in Chapter 7, ‘‘Keyboards and Pointing Devices.’’
For an overview of the tools that are used most often
when troubleshooting the workstation, see Chapter 8,
‘‘Troubleshooting Overview.’’
For a description of the information available to help you
identify failed FRUs, see Chapter 9, ‘‘Troubleshooting
Information.’’
For a description of the tests and scripts used when
troubleshooting, see Chapter 10, ‘‘Troubleshooting Tools.’’
For a set of specific troubleshooting procedures, see Chapter 11,
‘‘Troubleshooting Procedures.’’
For equipment specifications, see Appendix A, ‘‘Equipment
Specifications.’’
For equipment part numbers, see Appendix B, ‘‘Part Numbers.’’
For an explanation of console commands, see Appendix C,
‘‘Console Commands.’’
For an explanation of individual system module and memory
module tests, see Appendix D, ‘‘Base System Self-Test
Commands and Error Messages.’’
For information about connector pin assignments, see
Appendix E ‘‘CPU and System Registers.’’
For information about CPU and system registers, see
Appendix F ‘‘Connector Pin Assignments.’’

Scope
This maintenance guide discusses current DECstation 5000
Model 240 and 260 hardware, and will be revised as additional
options become available.
Table 1. Conventions
Convention

Use

Monospace
type

Anything that appears on your monitor screen
is set in monospace type, like this.

Boldface
type
Italic type

Anything you are asked to type is set in boldface
type, like this.
Any part of a command that you replace with an actual
value is set in italic type, like this.

xxi

Part I
Hardware

1
System Overview
This chapter provides an overview of the DECstation 5000
Models 240 and 260 hardware, and discusses the following
topics:
Basic system hardware
System hardware configurations
Hardware options and peripherals

System Overview 1–1

System Hardware Configurations
The DECstation 5000 Models 240 and 260 are reduced
instruction set computer (RISC) desktop systems based on
the MIPS Technologies, Inc. R3000 and R4000 processors. They
are designed to support the ULTRIX operating system.
The system can be configured as either a workstation or a
server.
When the system is configured as a workstation, the
user input and output devices are a graphics monitor
connected to a TURBOchannel option graphics module,
a keyboard, and a mouse or tablet.
When the system is configured as a server, the user
input and output devices are a keyboard connected
to a terminal which in turn is connected to serial
communications port 3.
The base system can be connected to the following devices:
One keyboard and mouse
Up to seven small computer system interface (SCSI)
storage devices
One Ethernet network
Two modems, terminals, printers, or other serial
devices
Graphics monitors and additional storage devices, network
connections, and serial devices can be supported by adding
TURBOchannel option modules.
Figure 1-1 shows the layout of the functional areas of the
DECstation 5000 Models 240 and 260.

1–2 System Overview

Alternate
Ethernet network

terminal

Up to seven drives
Keyboard

in three boxes
Mouse

Keyboard-

Serial

Diagonstic

Halt

Ethernet

SCSI

mouse line

line 2

line 3

LED array

button

(ThickWire)

(external)

TURBOchannel

option module

( slot 2 )

( slot 1 )

( slot 0 )

0
.
.
.
.
.
.
.
.
.
.
.
.
.

CPU module

14
Memory modules

WS3PM006

Figure 1-1. DECstation 5000 Model 240 & 260 functional areas

System Overview 1–3

System Unit
The system unit is an assembly of modular components of the
workstation, including the system unit chassis and cover, the
modules, and the power supply. The modular components are
called field replaceable units (FRUs). The components and
features of the system unit are as follows:
Base system module, which includes the following:
One double connector for the central processing unit
(CPU) module
One keyboard/mouse interface for the keyboard and
pointing device (mouse, tablet and stylus, or tablet and
puck)
Fifteen memory module connectors for single inline memory modules (SIMMs), providing up to 480
megabytes of random-access memory (RAM). A 1megabyte nonvolatile RAM (NVRAM) module, which
functions as a disk cache, can be installed in slot 14.
One SCSI controller for up to seven drives
Two synchronous/asynchronous RS232 serial
communications ports with full modem control
One ThickWire Ethernet controller
Three connectors for TURBOchannel option modules
Diagnostic read-only memory (ROM)
Replaceable/upgradeable CPU module with data and
instruction cache memory
Power supply assembly with three cooling fans
One metal chassis that holds the system module and power
supply
Removable system unit cover and removable front cover
plate

1–4 System Overview

Nameplate

System unit cover

Base system module
CPU module
Power supply
and fan assembly

TURBOchannel
option module
connector
(one of three)

System unit
chassis
Memory
module

Front cover plate

WS3PM001

Figure 1-2. System unit

System Overview 1–5

Controls and Indicators
The system unit controls and indicators are listed here and
shown in Figure 1-3.
The on/off switch controls the power to the system unit.
Press down the 1 side of the switch to turn the power on.
Press down the 0 side of the switch to turn the power off.
The power indicator light-emitting diode (LED) glows green
when the power supply is operating properly. This LED is
also referred to as the DCOK LED.
The diagnostic LED array contains two sets of four LEDs
that display error codes that help you identify faulty
components.
The Halt button halts the operating system and puts the
workstation into console mode.

1–6 System Overview

DEC sta
tion 500
0

Power supply
LED (green)

Front view

d i g
i t a
l

PMAG-C

0
PMAZ-A

V~100-120
A 3.0
V~220-240
A 1.7

1
2

PMAD-A

V~100-120/22
A 7.9/4.2

0-240

Hz 50-60
W 359

3
2

Diagnostic
LEDs (red)

On/off switch

Halt button

Back view
WS3PM003

Figure 1-3. Controls and indicators on the system unit

System Overview 1–7

External System Unit Connectors
The external system unit connectors on the back panel connect
the workstation to external devices. The external system unit
connectors are listed here and shown in Figure 1-4.
The power connector provides alternating current (AC)
power to the system unit from the system unit power cord.
The system-unit-to-monitor power connector provides
electric power to the monitor.
The keyboard-mouse connector links the system unit to the
keyboard-mouse cable.
The base system ThickWire Ethernet connector links the
base system Ethernet controller to an Ethernet network.
The base system external SCSI connector connects the base
system SCSI controller to a chain of external SCSI drives.
The two RS-232 serial communication connectors link the
base system to external devices such as printers, modems,
or console terminals.
Up to three option module connectors (in a row above the
other connectors listed here) connect TURBOchannel option
modules to external hardware. The number printed above
each option module position is the logical slot number
by which an option module mounted in that position
is addressed in test commands and identified in error
messages.

1–8 System Overview

System-unit-to-monitor
power connector

Option module
connectors
Base system
SCSI
connector

d i g
i t a
l

PMAG-C

0
PMAZ-A

V~100-120
A 3.0
V~220-240
A 1.7

1
2

PMAD-A

V~100-120/220

Base system

A 7.9/4.2

-240

Hz 50-60
W 359

ThickWire Ethernet
connector
Power connector
Printer or

Serial line 2

terminal
connector

Keyboard-mouse connector
Serial line 3
WS3PM002

Figure 1-4. External system unit connectors

System Overview 1–9

Internal Base System Module Connectors
The internal base system module connectors are the means by
which the system’s modular components, both standard and
optional, are connected to the base system module and, through
it, to each other. The internal base system module connectors
are listed here and shown in Figure 1-5.
The CPU module connector connects the CPU module to
the base system module.
Fifteen memory module connectors provide the means for
installing SIMMs and one optional NVRAM module.
Three internal TURBOchannel option module connectors
connect TURBOchannel option modules to the base system
module. The connector closest to the power supply is
referred to as logical slot number 2 in test commands and
error messages. The middle connector is logical slot 1,
and the connector furthest away from the power supply is
logical slot 0.
The power input connectors receive direct current (DC)
power from the power supply for all components in the
system unit enclosure.

1–10 System Overview

Option module
Memory module

System

CPU module

module

TURBOchannel
option module

Memory

expansion slots (3)

module
slots

WS3PM005

Figure 1-5. Internal base system module connectors

System Overview 1–11

Hardware Options and Peripherals
The DECstation 5000 Models 240 and 260 support the following
hardware options and peripherals:
A CPU module that can be removed and replaced or
upgraded
SIMMs for up to 480 megabytes of RAM.
One nonvolatile RAM (NVRAM) module
Up to three TURBOchannel option modules
Up to seven SCSI drives per SCSI controller
Graphics monitors and terminals
Keyboard and mouse or other pointing device
RS-232 serial devices
Figure 1-4 and Figure 1-5 show the external and internal
connectors that support the hardware options and peripherals.

1–12 System Overview

CPU Module Description
The DECstation 5000 Model 240 contains the KN03-GA CPU
module. The DECstation Model 260 contains the KN05-NB
CPU module. The KN03-GA CPU module runs at 40 megahertz
(MHz) and contains a total of 128 kilobytes of cache memory for
instructions and data. The KN05-NB CPU module runs at 60
MHz and contains both a primary cache (internal to the CPU)
and secondary cache (external to the CPU). Both CPU modules
are replaceable. See the "CPU Module" section in Chapter 5 for
information about the CPU module.
System Boot ROM
The system can boot from the system module or from the Boot
ROM on the R4000 CPU. Two switches located on the CPU
controls the access to the Boot ROM. See Figure 1-6 for the
location of these switches. If these two switches are present on
the R4000 they must always be in the OFF postion, the other
postions are used by manufacturing only.

System Overview 1–13

MLO-010158
LJ-02974-TI0

Figure 1-6. System Rom Switches
Note: Note the orientation of the switches. Switches pointing to the

ON postion are on, switches pointing towards the 1, 2 are off.

Memory Modules
The base system module has 15 memory module connectors.
The following memory module types are supported:
8-megabyte SIMM (MS02L-AB)
32-megabyte SIMM (MS02-CA)
1-megabyte NVRAM module (54-20948-01)
Note: All SIMMs installed in a system must contain the same

amount of memory. Do not mix 8-megabyte and 32-megabyte SIMMs
in a single system. The NVRAM must be installed in slot 14.

1–14 System Overview

The SIMMs must be installed starting with memory slot 0,
nearest the back of the system. Console mode requires one
SIMM installed on the base system module. Operating mode
requires greater amounts of RAM, depending on the operating
system software installed. See the "Memory Modules" section
in Chapter 5 for information about memory modules.
Monitors and Terminals
The monitors supported depend on the TURBOchannel graphics
modules installed. Refer to the TURBOchannel Maintenance
Guide for a list of monitors that each TURBOchannel graphics
module supports.
The system can also display console text on and accept keyboard
input from a terminal connected to serial port 3 on the back of
the system unit. The monitor can be any RS-232 monitor
of type VT52 or later. See Chapter 3 for information about
installing an alternate terminal.

System Overview 1–15

Keyboard, Mouse, and Other Pointing Devices
The system receives input from the user through a keyboard
and a mouse or other pointing devices. The keyboard and
mouse or tablet connect to the keyboard-mouse connector on the
back of the system unit through the keyboard-mouse cable. See
Chapter 7 for information about the keyboard and mouse.
The following keyboards are supported:
LK401 keyboard
LK421 keyboard
The following pointing devices are supported:
VSXXX-GA mouse
VSXXX-AB tablet
In addition, one or both of the following pointing devices can be
connected through one of the serial ports:
Lighted programmable function keyboard (LPFK)
Programmable function dials (PFD)

1–16 System Overview

SCSI Drives
The base system module comes with one onboard SCSI
controller. In addition, up to three single width TURBOchannel
SCSI controller option modules can be added to the system.
Each SCSI controller can support up to seven drives. See
Chapter 6 for more information about the SCSI drives.
TURBOchannel Option Modules
The TURBOchannel connectors on the base system module
can support three TURBOchannel option modules. Any
SCSI controller, Ethernet controller, or serial controller
TURBOchannel option modules operate in addition to the
equivalent functions on the base system module. See the
"TURBOchannel Option Modules" section in Chapter 5 for
information about removing and installing TURBOchannel
option modules. See Chapter 11 for SCSI, Ethernet, and serial
controller troubleshooting procedures.

For Further Information
For troubleshooting information, see Chapters 8, 9, 10, and 11.
For detailed information about the FRUs mentioned in this
chapter, refer to the chapter later in this guide that discusses
the FRU in which you are interested.
For further information about service for TURBOchannel
option modules and connected drives and monitors, refer to the
TURBOchannel Maintenance Guide.

System Overview 1–17

2
Console Mode and Operating Mode
This chapter discusses the following topics:
Console mode and operating mode
Console prompts
Password management
System software startup and shutdown

Console Mode and Operating Mode 2–1

Modes
The system operates in two modes: console mode and operating
mode.
Console Mode
Most maintenance operations are conducted in console mode,
including the following:
Displaying hardware configurations (see Chapter 9 and
Appendix C)
Setting environment variables (see Chapters 8 and 10 and
Appendix C)
Running diagnostic tests and scripts (see Chapters 8 and
10 and Appendixes C and D)
Booting the system software (see the"System Software
Management" section in this chapter)
Note: ULTRIX error logs cannot be accessed from console mode; they
can be accessed only from operating mode.

Console mode operations require that at least one RAM SIMM
be installed in slot 0 on the base system module.
Console prompts

When the normal console prompt (>>) is displayed, full
console functionality is available, and you can use all console
commands.
When the restricted console prompt (R>) is displayed, you can
enter only the boot or passwd command.
Console commands, including boot and passwd, are discussed in
Chapters 8 and Chapter 10 and Appendix C.
To enter console mode

This section lists the methods of entering console mode in order
of recommended preference. Enter console mode in one of the
following ways, depending on circumstances:
If system software is running, shut down the system
software. The system enters console mode automatically

2–2 Console Mode and Operating Mode

when system software is shut down. This is the most
orderly way to enter console mode as it prevents corruption
of the data. See the "To Shut Down System Software"
section in Chapter 2.
Note: Turning off the power while ULTRIX is running can
corrupt data.

If the system software will not accept the shutdown
command, press the Halt button on the rear panel of the
system unit. The system backs up what it can and shuts
down the operating mode in the most orderly way possible.
If autoboot is not enabled, turn the system power off, and
then turn it on again. The system executes the power-up
self-test sequence and then comes up in console mode,
displaying one of the console prompts (>> or R>).
If autoboot is enabled, you will need to defeat autoboot to
enter console mode. Defeat autoboot in one of the following
ways:
Turn the system power off, and then turn it on again.
Watch the command line on the monitor. As each
power-up self-test runs, the name of the test appears on
the command line.
When the screen does not display any test name and
the cursor appears on a blank line, quickly press
Ctrl-C.
The system aborts the boot process and comes up in
console mode, displaying one of the console prompts (>>
or R>)
Use the clear-NVR jumper to return the environment
variables to their default values where autoboot is
disabled. See the "To Erase the Password" section in
Chapter 2
If the R> prompt is displayed, you can use only the boot and
passwd commands until you enter the password. See the
"Password Management" section in Chapter 2.

Console Mode and Operating Mode 2–3

Halt button

The Halt button on the rear panel interrupts the processor. The
data in the memory and registers is preserved. An application
can be halted to examine the state of memory and registers.
The following screen output sample
shows what would be seen when the halt button is pressed on a
Model 260 system (R4000 CPU module installed).
Halt button screen output

>>
???
? PC: 0xa0010048 <vtr=NMI/SR>
? SR: 0x00510006 <BEV,SR,DE,IPL=8,MODE=KNL,ERL,EXL>
? CFG: 0x10410243 <SB=8W,SC=Y,IC=8K,DC=8K,IB=4W,DB=4W,K0=CNC>
?
? MB_CS: 0x00008000 <MSK=0,EE,ECC=0>
? MB_INT: 0x001f0000 <>
?
? at:00000070 a2:00000000 t3:00000002 s0:A00054F0 s5:0000000A k1:FFDFD7FF
? v0:00000067 a3:A0004C70 t4:00000000 s1:A00054F0 s6:0000000D gp:B2CE8E25
? v1:A000FEF0 t0:00000010 t5:00018F00 s2:FFFFFFFF s7:00000015 sp:A000FEBC
? a0:A0004C70 t1:00000010 t6:BFC0E3D4 s3:00000008 t8:BFC0E3D4 fp:0000007F
? a1:A000FEF0 t2:00000001 t7:00000001 s4:00000009 t9:A0010000 ra:A0010050
KN05-AA V1.0a
>>

(PC: 0xa0010048, SP: 0xa000febc)

Operating Mode
In operating mode, the system displays the ULTRIX prompt.
Operating mode is used for regular software operation.
For maintenance purposes, operating mode is used to access
ULTRIX error logs.
Operating mode requires at least 16 megabytes of RAM memory
installed on the base system module. Some operating systems
and versions require more than 16 megabytes of RAM. Refer to
the operating system documentation for information about the
amount of RAM required.
To enter operating mode

The system enters operating mode in one of two ways:
automatically (autoboot) or manually from console mode.
If autoboot is enabled, the system executes the boot command
immediately after the power-up self-test. The system goes
directly to operating mode without displaying the console
prompt. Autoboot is enabled when the haltaction environment

2–4 Console Mode and Operating Mode

variable has been set to b and the boot environment variable
has been set to a meaningful bootpath. The boot and setenv
commands and the environment variables are discussed in
Appendix C.
Procedures for entering operating mode manually from either
console prompt are described in the "To Boot System Software"
section in this chapter.

Console Password Management
If a console password has been set, you must enter that
password to access full console mode. After the power-up selftest sequence is completed, the screen displays the restricted
console prompt (R>). You can use only the boot and passwd
commands until you enter the correct password. The console
password and the operating mode password are independent
of each other. For information about the operating mode
password, refer to the system software documentation.
To Enter the Password
1.
2.

At the R> prompt, type passwd and press Return. The
system displays the pwd: prompt.
Type the password and press Return.

Console Mode and Operating Mode 2–5

To Set or Change the Password
1.
2.
3.

At the >> prompt, type passwd- s and press Return.
At the pwd: prompt, type the new password and press
Return.
The system displays the pwd: prompt again. Enter the
password again and press Return.

If the two password entries match exactly (including use of
uppercase and lowercase letters), the entry becomes the new
password. If the two entries do not match, the old password
remains in effect.
A password must have at least 6 and no more than 32
characters.
A password must always use the same uppercase and
lowercase letters. The system treats the uppercase version
and the lowercase version of a letter as two different letters.
To Remove the Requirement for a Password
To remove the requirement for a password, at the >> prompt,
type passwd-c and press Return.
To Erase the Password
If the password is unknown, you can use the clear-NVR jumper
(12-14314-00) to erase the password. The clear-NVR jumper
erases all password settings and any existing environment
variable settings. You will need to reset the environment
variables as well as the password. Use the clear-NVR jumper
as follows:
1.

2.
3.

Turn off the system power, remove the system unit cover,
and locate the 2-pin clear-NVR connector on the system
module. Figure 2-1 shows the location of the clear-NVR
connector.
Slide the jumper entirely over the clear-NVR connector.
Turn on the system power and wait for the console prompt
to appear.

2–6 Console Mode and Operating Mode

4.
5.
6.
7.

When the console prompt appears, turn off the system
power again.
Remove the clear-NVR jumper.
Turn on the system power.
Use the passwd and setenv commands to set the password
and the environment variables. See Appendix C for
instructions.
Clear-NVR jumper
Clear-NVR pins
System module

WS3PM020

Figure 2-1. Clear-NVR jumper

System Software Management
The following system software (ULTRIX) operations are
significant to the hardware maintenance process:
Starting up (booting) system software
Shutting down system software
Accessing ULTRIX error logs

Console Mode and Operating Mode 2–7

To Boot System Software
1.
2.

At either console prompt >> or R>, type boot and press
Return. The boot process takes several minutes.
If the system displays the ULTRIX prompt (#) before
the login: prompt appears, the system has stopped at
single-user mode instead of multiuser mode. To move
on to multiuser mode, press Ctrl-d to continue the boot
operation. When the system displays the login: prompt,
the system software has started successfully. The system
stopped at single-user mode because the bootpath is set
for single user mode or because of disk corruption. See the
"setenv Command" section in Appendix C for information
about how to set the bootpath for multiuser mode. If the
problem persists, clean the disks using the fsck function.
If the system displays a console prompt (>> or R>), the boot
failed. Proceed as follows:
a. If the system displays an error message, see the
"Console Command Error Messages" section in
Appendix C .
b. If the the system displays the restricted prompt (R>),
type passwd and press Return. At the pwd: prompt,
enter the password and press Return. The system
displays the console prompt (>>). If you cannot enter
the password, see the "Password Management" section
in Chapter 2 .
c. At the console prompt (>>), type printenv and press
Return to display the environment variables table.
d. Use the setenv command to set the boot environment
variable to a device or to the network that contains the
system software that you want to boot. See the "boot
Command" section in Appendix C .
e. Reenter the boot command to boot the system.

2–8 Console Mode and Operating Mode

To Shut Down System Software
If the system is running ULTRIX software, shut down the
software before you perform hardware maintenance.
At the ULTRIX prompt (#), type
/etc/shutdown -h (now | hhmm | +n)
and press Return.
You must include one of the parameters shown in parentheses
to tell the system when to shut down.
Specify the now parameter to shut down the software
immediately.
Specify hhmm to shut down the software at a specific hour
and minute.
Replace hh with the hour to begin the shutdown.
Replace mm with the minute to begin the shutdown.
Specify +n to shut down the software in a specified number
of minutes. Replace n with the number of minutes until
shutdown begins.
The system displays a console prompt (>>) or (R>) when
shutdown is complete.
To Access ULTRIX Error Logs
At the ULTRIX prompt (#), type
/etc/uerf (-R | more)
and press Return. For information about interpreting the
ULTRIX error logs, see the "ULTRIX Error Logs" section in
Chapter 9.

Console Mode and Operating Mode 2–9

3
Alternate Terminal
This chapter discusses the following topics:
Alternate terminal settings
Installing an alternate terminal
Reactivating the regular system monitor and keyboard
If the regular system monitor is not working properly and
you cannot access the workstation from another node on the
network, you can install an alternate terminal to run tests and
read error messages. Use any terminal from the VT100, VT200,
or VT300 series or equivalent. When the alternate terminal has
been activated, the following conditions apply:
The regular system monitor is deactivated, and the
alternate terminal displays the same text as the regular
system monitor would.
You can type commands only from the alternate keyboard.
Alternate Terminal Settings
The alternate terminal must be set as shown in Table 3-1.
Refer to the terminal documentation if necessary.

Alternate Terminal 3–1

Table 3-1. Alternate Terminal Settings
Setting

Value

Baud rate
Bits
Parity
Stop bits
Handshake
Mode

9600
8
None
1
Xon/Xoff
Full duplex

To Install the Alternate Terminal
1.
2.
3.
4.

Switch to console mode. See the "To Enter Console Mode"
section in Chapter 2.
Turn off the system unit.
Connect the alternate keyboard to the keyboard port of the
alternate terminal.
Install a serial line adapter on the left serial communications connector (line 3) of the system unit. See the "Serial
Line Adapter" section in Chapter 4.
Connect one end of the communications cable to the I/O
port of the alternate terminal. Connect the other end of
the cable to the serial line adapter connected to the system
unit.
Turn on the alternate terminal. Then turn on the system
unit.

3–2 Alternate Terminal

Wait for the console prompt (>>). If no prompt appears
within 2 minutes, proceed without it. On the regular
system keyboard, type:
setenv console s

and press Return. The alternate terminal is enabled as the
console. Even if the graphics module doesn’t work and the
console prompt doesn’t appear, the regular system keyboard
should still work. See Appendix C for more information
about the setenv command and the console environment
variable.
If the regular system keyboard does not work or the system
does not accept the setenv command, proceed as follows:
a. Turn off the system unit.
b. Disconnect the regular keyboard from the keyboardmouse connector on the back of the system unit.
c. Remove the TURBOchannel graphics module. See the
"TURBOchannel Option Modules" section in Chapter 5.
d. Connect the alternate terminal and keyboard.
e. Turn on the system unit. The system starts up with the
alternate terminal and keyboard enabled.

To Reactivate the Regular System Monitor and Keyboard
Type
setenv console *
and press Return. The system enables the monitor connected
to the base system video controller or to the graphics module in
the lowest-numbered TURBOchannel option slot as the console.

Alternate Terminal 3–3

Regular system monitor

Alternate terminal

Left communications
connector (serial line 3)

Communications
line adapter
3

Alternate terminal cable
WS3PM008

Figure 3-1. Alternate terminal

3–4 Alternate Terminal

4
General Hardware Service Operations
The following general service operations are described in this
chapter:
Avoiding electrostatic damage when handling components
Removing and installing the system unit cover
Removing and installing the front cover plate
Removing and installing the serial number plate
Removing and installing the nameplate
Removing and installing terminators and loopback
connectors

General Hardware Service Operations 4–1

Antistatic Kit
The Digital antistatic kit contains the equipment you need to
handle static-sensitive electronic components safely Figure 4-1.
Use the antistatic kit as follows:
1.
2.

Connect the antistatic mat to the system chassis.
Place the antistatic wrist strap around your wrist and
attach the other end of the strap to the snap-on fastener
on the antistatic mat. You are now ready to handle staticsensitive components safely.
Always place the static-sensitive components on the
antistatic mat.

If no antistatic kit is available, wear the disposable grounding
wrist strap (12-36175-01) on your wrist and attach the other
end to the workstation chassis.

4–2 General Hardware Service Operations

Antistatic mat
Wrist strap

Snap-on fastener

Snap-on fastener
WS3PM004

Figure 4-1. How to use the antistatic kit

General Hardware Service Operations 4–3

System Unit Cover
Removing the System Unit Cover
1.
2.
3.
4.

Ensure power is turned off.
Loosen the captive screw that fastens the cover to the back
panel of the system unit box.
Face the front of the system unit and grip both sides of the
system unit cover.
Pull the cover toward you approximately 2 inches (5 cm).
When the cover comes loose from the chassis, lift it up and
away from the system unit.

Installing the System Unit Cover
1.

2.
3.

Place the system unit cover on the system unit chassis.
Leave at least 2 inches (5 cm) between the back of the cover
and the back of the chassis.
Slide the cover toward the back of the chassis until it snaps
into place.
Tighten the captive screw.

4–4 General Hardware Service Operations

Captive screw
On/off switch

Nylon unit cover guide
(One on each side of chassis)

LJ-02964-Ti0

Figure 4-2. System unit cover

Front Cover Plate
Removing the Front Cover Plate
1.
2.
3.
4.

Make sure the power is off.
Remove the system unit cover. See the "System Unit Cover"
section in this chapter.
Loosen the two captive screws that fasten the front cover
plate to the system unit chassis.
Tilt the plate forward and lift it away from the chassis.

General Hardware Service Operations 4–5

Installing the Front Cover Plate
1.
2.
3.
4.

Make sure the power is off.
Insert the tabs along the bottom of the front cover plate
into the slots along the front of the system unit chassis.
Tilt the plate up against the front of the chassis.
Tighten the two captive screws.

Captive
screw

System
Front

unit

cover

chassis

plate
Captive
screw
WS3PM011

Figure 4-3. Front cover plate

4–6 General Hardware Service Operations

Serial Number Plate
When the base system module and chassis has been changed,
install the serial number plate from the original chassis on the
new chassis.
Removing the Serial Number Plate
1.
2.
3.
4.
5.

Make sure the power is off.
Remove the system unit cover. See the "System Unit Cover"
section in this chapter.
Peel the tamper-proof tape off the two nuts that hold the
serial number plate.
Remove the nuts. Use a crescent wrench to loosen the nuts.
Pull the serial number plate away from the system unit
chassis.

Installing the Serial Number Plate
1.

2.
3.

Pass the two mounting posts on the back of the serial
number plate through the holes in the back panel of the
system unit chassis.
Tighten the two nuts onto the posts.
Apply one piece of tamper-proof tape (36-33513-01) over
each nut and post.

General Hardware Service Operations 4–7

Nuts (2)

Tamper-proof tape

Mounting posts

d i g
i t a
l

PMAG-C

Serial number

0
1

plate

WS3PM010

Figure 4-4. Serial number plate

4–8 General Hardware Service Operations

Nameplate
Removing the Nameplate Medallion
1.
2.
3.
4.

Make sure the power is off.
Remove the system unit cover. See the "System Unit Cover"
section in this chapter.
Place the cover upside down.
With your fingers or a small pair of pliers, pinch each
nameplate medallion tab together and push the tabs
through the holes in the front of the cover.
Pull the name plate away from the system unit cover.

Installing the Nameplate Medallion
1.
2.
3.

Place the cover upside down.
Hold the nameplate medallion upside down and align the
tabs with the holes in the front of the cover.
Push the tabs through the holes until they snap into place.

General Hardware Service Operations 4–9

Nameplate medallion tabs

d i g i t
a l

DECstation 5000

/240

System unit cover (upside down)
WS3PM009

Figure 4-5. Sample Nameplate

Adapters, Terminators, and Loopback Connectors
This section describes how to install and remove each
terminator, adapter, and loopback connector on the system
unit.

4–10 General Hardware Service Operations

Serial Line Adapter
Use the serial line adapter (12-33190-01) to connect a modular
(telephone-jack-type) cable connector from a serial device to the
D-connector of the system’s RS-232 serial communications port.
The serial line adapter is also called the comm-line-to-MMJ
adapter. (MMJ stands for modified modular jack.)
Installing a serial line adapter
1.
2.

Press the serial line adapter onto the serial connector. The
adapter fits only one way.
Tighten the two screws.

Removing a serial line adapter
1.
2.

Loosen the two screws that hold the adapter to the serial
connector.
Pull the adapter off the connector.

Communications

line adapter

Screws

Left communications
connector (serial line 3)

Right communications
connector (serial line 2)

WS3PM014

Figure 4-6. Serial line adapter

General Hardware Service Operations 4–11

SCSI Controller Terminator
A SCSI controller terminator (12-33626-01) must be installed
on the connector of any SCSI controller that has no external
device connected to it.
Installing a SCSI controller terminator
1.
2.

Align the terminator over the SCSI connector. The
terminator fits only one way.
Firmly press the terminator onto the SCSI connector.

Removing a SCSI controller terminator
1.
2.

Grip the loop on the SCSI controller terminator.
Pull the terminator off the connector.
TURBOchannel option
module SCSI controller
with terminator installed

Base system
SCSI
connector

PMAG-C

SCSI icon
SCSI terminator
WS3PM015

Figure 4-7. SCSI controller terminator

4–12 General Hardware Service Operations

SCSI Chain Terminator
The last SCSI drive or expansion box in a chain requires a SCSI
chain terminator (12-30552-01) on its unused connector. An
exception to this requirement is the TURBOchannel Extender
(TCE), which has only one SCSI connector and does not need
an external terminator. When the TCE is used as a SCSI
expansion box, it must be mounted last in the SCSI chain.
Installing a SCSI chain terminator
1.

Firmly press the chain terminator onto the unused
connector on the last drive in the chain. The terminator fits
only one way.
Press the wire latches onto the SCSI terminator.

Removing a SCSI chain terminator
1.
2.

Push the wire latches away from the terminator.
Pull the terminator off the SCSI connector.

Wire latch

SCSI chain terminator

SCSI drive
WS3PM013

Figure 4-8. SCSI chain terminator

General Hardware Service Operations 4–13

ThickWire Ethernet Loopback Connector
The ThickWire Ethernet loopback connector (12-22196-02) must
be installed for certain Ethernet controller (base system or
TURBOchannel option) tests.
Installing a ThickWire Ethernet loopback connector
1.
2.

Align the loopback connector with the ThickWire Ethernet
connector. The loopback connector fits only one way.
Firmly press the loopback connector onto the ThickWire
Ethernet connector.

Removing a ThickWire Ethernet loopback connector
1.
2.

Firmly grip the ThickWire loopback connector.
Pull the loopback connector away from the ThickWire
connector.
Base system
ThickWire
Ethernet
connector

TURBOchannel option module
Ethermet controller with
loopback connector installed

2
Sliding lock
ThickWire
loopback
connector
WS3PM019

Figure 4-9. ThickWire Ethernet loopback connector

4–14 General Hardware Service Operations

Serial Line Loopback Connector
The serial line loopback connector (12-25083-01) must be
installed for certain serial controller tests.
Installing a serial line loopback connector
1.
2.

Align the loopback connector with the serial line connector.
The loopback connector fits only one way.
Firmly press the connector onto the serial line connector.

Removing a serial line loopback connector
1.
2.

Firmly grip the serial line loopback connector.
Pull the connector away from the serial line connector.
Communications
connector

PMAG-C

0
1

3
Communications
loopback connector
WS3PM012

Figure 4-10. Serial line loopback connector

General Hardware Service Operations 4–15

5
Electronic Component Service Operations
This chapter provides instructions for removing and installing
the following field-replaceable units (FRUs):
Base system module and chassis
Ethernet station address register (ESAR) chips
Central processing unit (CPU) module
Single in-line memory modules (SIMMs)
Nonvolatile random-access memory (NVRAM) module
Power supply
TURBOchannel option modules
Caution: Always follow antistatic procedures when handling
electronic components.

Electronic Component Service Operations 5–1

Base System Module
The base system module provides basic system functions.
The base system module features are significant to the field
maintenance process listed here, and shown in Figure 5-1.
One CPU module connector
One keyboard-mouse interface for the keyboard and
pointing device (mouse, tablet and stylus, or tablet and
puck)
Fifteen memory module connectors for SIMM and NVRAM
memory modules.
One small computer system interface (SCSI) controller
Two synchronous/asynchronous RS-232 serial communications ports
One ThickWire Ethernet controller with ESAR chip
Three TURBOchannel option module connectors
One clear-NVR connector
Diagnostic read-only memory (ROM)
The base system module and chassis are one unit (70-28348-01).
Never remove the base system module from the chassis.

5–2 Electronic Component Service Operations

TURBOchannel
option module slot
(one of three)

CPU module
ESAR chip

connector

Memory
module
slots
WS3PM023

Figure 5-1. Base system module

Electronic Component Service Operations 5–3

To Install the Base System Module and Chassis
To install a system module and chassis, transfer the removable
parts from the old system module onto the new system module.
Warning: The system module and chassis are one unit. Never remove
a system module from the chassis.

To remove the components from the old base system module
and chassis,
If possible, use the printenv command to display the
environment variables. Record their values to be set on
the new module.
2. Turn off the power. Disconnect all cables attached to the
back of the system unit.
3. Remove the system unit cover and front cover plate. See
the "System Unit Cover" and "Front Cover Plate" sections
in Chapter 4.
4. Disconnect the system module power supply cords from the
system module.
5. Remove all TURBOchannel option modules. See the
"Option Modules" section in this chapter.
6. Remove the memory module retaining bar and all memory
modules. See the "Memory Modules" section in this chapter.
7. Remove the CPU module. See the "CPU Module" section in
this chapter.
8. Remove the power supply. See the "Power Supply" section
in this chapter. If your system has the R4000 CPU
Module upgrade installed, be sure to remove the two EMI
grounding clips attached to the power supply.
9. Remove the ESAR chip from the base system module. See
the "Base System ESAR Chip" section in this chapter.
10. Remove the serial number plate from the rear panel of the
system unit chassis. See the "Serial Number Plate" section
in Chapter 4.
11. If there are customer property identification labels on the
old system unit chassis, have the customer transfer the
labels to the new system unit chassis.
1.

5–4 Electronic Component Service Operations

Captive allen screws
(one of two)

EMI
grounding clip

Wooden
tool

EMI
grounding
clips

Option module
Retaining bar

Power supply

Memory
module

CPU module
Front cover plate

LJ-02966-TI0

Figure 5-2. Removing and installing the base system module

Electronic Component Service Operations 5–5

To install components on the new base system module and
chassis,
Install the ESAR chip from the old base system module.
See the "Base System ESAR Chip" section in this chapter.
2. Install the serial number plate from the old chassis onto
the new chassis. See the "Serial Number Plate" section in
Chapter 4.
3. Install the power supply and connect the system module
power supply cords to the system module. Be sure the two
EMI ground clips from the R4000 CPU Module Upgrade
Kit are reinstalled, if applicable. See the "Power Supply"
section in this chapter.
4. Install the CPU module. See the "CPU Module" section in
this chapter.
5. Install the memory modules and memory retaining bar. See
the "Memory Modules" section in this chapter.
6. Install the TURBOchannel option modules. See the
"TURBOchannel Option Modules" section in this chapter.
7. Install the front cover plate. See the "Front Cover Plate"
section in Chapter 4.
8. Connect the cables to the back of the system unit.
9. Connect the system module power cord.
10. Turn on the system unit and check the power-up selftest results to make sure the system runs properly. If
the power-up self-test does not complete successfully, see
"When the Power-up Self-test Does Not Complete" section
in Chapter 11.
11. Use the setenv command to set the environment variables
on the new base system module, using the values recorded
from the old base system module, if possible.
12. Install the system unit cover. See the "System Unit Cover"
section in Chapter 4.
1.

5–6 Electronic Component Service Operations

Base System ESAR Chip
The base system module contains an Ethernet station address
register (ESAR) chip (23-365A1-00), which provides the
Ethernet address of the base system Ethernet controller. When
you install a new base system module, remove the ESAR chip
from the old base system module and install it on the new one
so the workstation will have the same address on the network.
Every TURBOchannel Ethernet option module (PMAD-AB) also
has an ESAR chip. See the "Ethernet Option Module ESAR
Chip" section in this chapter.
Note: If you use a new ESAR chip, inform the system manager.
Caution: Always follow antistatic procedures when handling

electronic components.

To remove the base system ESAR chip
1.
2.

3.
4.

Turn off the system unit power and remove the system unit
cover. See the "System Unit Cover" section in Chapter 4.
If a TURBOchannel option module is installed in slot 1,
remove it. See the "TURBOchannel Option Modules"
section in this chapter.
Locate the ESAR chip. See Figure 5-3
Gently pry the ESAR chip up out of its socket.

To install the base system ESAR chip
1.

Position the ESAR as shown in Figure 5-3. The notched
end of the chip should be toward the rear of the system
unit, and each pin should be over a hole in the ESAR chip
socket.
Press the pins into the ESAR socket. Be careful not to bend
the pins.

Electronic Component Service Operations 5–7

The notch must face the
back of the system unit.
ESAR chip

EN
E
DS T AD
77 RS
c D 059 0
EC 44Y
9
1 F TJZ
X9
13
63
65
A1

ESAR
socket

WS3PM034

Figure 5-3. Base system ESAR Chip

5–8 Electronic Component Service Operations

CPU Module
The DECstation 5000 Model 240 supports the replaceable
KN03-GA central processing unit (CPU) module Figure 5-4.
The KN03-GA CPU module runs at 40 megahertz (MHz).
The CPU module uses the MIPS Technologies, Inc. R3000A
CPU and R3010 Floating Point Unit (FPU), mounted on the
same chip. The CPU uses a 64-kilobyte instruction cache and a
64-kilobyte write-through data cache.
The Decstation 5000 Model 260 supports the replaceable R4000
KN05 (54-21872-02) central processing unit (CPU) module
Figure 5-5. The CPU module uses the MIPS Technologies,
Inc. R4000 family CPU chip which has the floating point unit
built into the R4000 chip. The R4000 CPU module runs at 60
megahertz (MHz).
The CPU modules have a pair of LEDs that indicate when
certain power-up milestones occur. See the "Troubleshooting
with LED Codes" section in Chapter 11.
CPU Module Upgrade
If you are upgrading your cpu module from the KN03 (R3000)
to the KN05 (R4000) type, you should have an upgrade kit
which includes the following components:
Table 5-1. CPU Module Upgrade Kit Components
Quantity

Description

Part Number

1
1
1
2
1
1
1
1

R4000 CPU Module
PC Removal Tool
Product Conversion Label
EMI Grounding Clips
Medllion
Medllion
Disposable Ground Strap
Warning Label

54-21872-02
74-46254-01
36-15946-11
74-46746-01
74-43093-11 (workstation)
74-43093-15 (server)
12-36175-01
36-19551-01
(continued on next page)

Electronic Component Service Operations 5–9

Table 5-1 (Cont.). CPU Module Upgrade Kit Components
Quantity

Description

Part Number

1
2

Return Label
Push Rivets

36-26123-07
90-11357-01

See the "Installing a CPU Module" section of this chapter for
detailed instructions on installing the upgrade kit components.
CPU module

Connectors
WS3PM033

Figure 5-4. R3000 CPU module

5–10 Electronic Component Service Operations

Figure 5-5. R4000 CPU module

MLO-010158
LJ-02973-TI0

Electronic Component Service Operations 5–11

Removing a CPU Module
1.

Unlock the mounting posts that fasten the CPU module
to the base system module. Use the PC Removal Tool (7446254-01) to squeeze each mounting post lock. Then lift the
corner of the CPU module board slightly to free it from the
lock.
When the board is free of all locks, grip the board by the
edges at both ends of the connector and lift the board up
and out of the connector. If necessary, gently rock the
module to loosen it. See Figure 5-6 which shows how to
remove the cpu module from the mounting posts.

Caution: Do not touch the CPU module heat sinks. The heat sink
attachments are fragile and break easily. The heat sink may also be
very hot if the unit was recently powered down.

Installing a CPU Module
1.

3.
4.

Check to see you have the correct CPU module you intend
to install. Figure 5-4 and Figure 5-5 shows a diagram of the
R3000 CPU Module and R4000 CPU Module respectively.
Position the CPU module so that its connector is aligned
over the CPU module connector on the base system module.
Align the holes in the CPU module over the mounting posts
on the base system module.
Press the CPU module connector into the base system
module connector.
Press the hole in each corner of the CPU module onto the
corresponding mounting post lock.
If you are upgrading your CPU module, perform the
following additional steps...

Install the two EMI grounding clips (74-46746-01) to
the base of the power supply. Use a regular flat-bladed
screwdriver to push the clips under the power supply.
Figure 5-2 shows the correct placement of clips.

5–12 Electronic Component Service Operations

Add the product conversion label (36-15946-11) to the top
cover of the base system module. This label identifies the
change of CPU modules from a KN03 (R3000) to a KN05
(R4000). The label should be installed near the back edge
of the cover, centered between the two sides.

Do not touch the CPU
module heat sink
CPU module

Standoff
removal
tool
Lock

Mounting posts
(one of four)
LJ-02965-TI0

Figure 5-6. Removing and installing a CPU module

Electronic Component Service Operations 5–13

Memory Modules
The base system module holds up to fifteen 8-megabyte or
32-megabyte single-inline memory modules (SIMMs). A 1megabyte nonvolatile random-addess memory (NVRAM) module
can be installed in only slot 14.
Note: At least one SIMM must be installed in slot 0 for console

operations to execute.

SIMMs must be installed starting with the connector
nearest the back of the system unit, slot 0. Each connector
is identified by a slot number etched on the edge of the
system module board. The connector nearest the front is
slot number 14.
The SIMMs installed in a system must be all 8-megabyte or
all 32-megabyte modules. Never combine 8-megabyte and
32-megabyte SIMMs in the same system.
The 8-megabyte SIMM is very similar to the 32-megabyte
SIMM.
The 8-megabyte SIMM part number is MS02-AA
/MS02L-AB.
The 32-megabyte SIMM part number is MS02-CA.

5–14 Electronic Component Service Operations

Notch

Front view

Alternate
part number
label

Notch

Part number label

Back view
WS3PM016

Figure 5-7. SIMM

Electronic Component Service Operations 5–15

Memory Slot Numbers and Address Ranges
Figure 5-8 shows the memory module slot numbers. These slot
numbers are used to identify the SIMMs or the NVRAM module
in test commands and error messages.
Table 5-2 shows the address range for each memory module
slot. When a memory error occurs, the error message contains
the address of the error. You can identify the faulty SIMM or
NVRAM module by the address.
Table 5-2. Memory Module Address Ranges
Memory
Slot

8-Mbyte Module
Address Ranges

32-Mbyte Module
Address Ranges

0
1
2
3
4
5
6
7
8
9
10
11
12
13
14

0xA0000000 to 0xA07FFFFF
0xA0800000 to 0xA0FFFFFF
0xA1000000 to 0xA17FFFFF
0xA1800000 to 0xA1FFFFFF
0xA2000000 to 0xA27FFFFF
0xA2800000 to 0xA2FFFFFF
0xA3000000 to 0xA37FFFFF
0xA3800000 to 0xA3FFFFFF
0xA4000000 to 0xA47FFFFF
0xA4800000 to 0xA4FFFFFF
0xA5000000 to 0xA57FFFFF
0xA5800000 to 0xA5FFFFFF
0xA6000000 to 0xA67FFFFF
0xA6800000 to 0xA6FFFFFF
0xA7000000 to 0xA77FFFFF

0xA0000000 to 0xA1FFFFFF
0xA2000000 to 0xA3FFFFFF
0xA4000000 to 0xA5FFFFFF
0xA6000000 to 0xA7FFFFFF
0xA8000000 to 0xA9FFFFFF
0xAA000000 to 0xABFFFFFF
0xAC000000 to 0xADFFFFFF
0xAE000000 to 0xAFFFFFFF
0xB0000000 to 0xB1FFFFFF
0xB2000000 to 0xB3FFFFFF
0xB4000000 to 0xB5FFFFFF
0xB6000000 to 0xB7FFFFFF
0xB8000000 to 0xB9FFFFFF
0xBA000000 to 0xBBFFFFFF
0xBC000000 to 0xBDFFFFFF

5–16 Electronic Component Service Operations

Captive screw

Memory module

Captive screw

0
1
2
3
4
5
6
7
8

Memory module
slot numbers

9
10
11
12
13
14

WS3PM031

Figure 5-8. Memory module slot numbers

Electronic Component Service Operations 5–17

Removing a SIMM Module
1.
2.

3.
4.

Turn off the system power. Remove the system unit cover.
See the "System Unit Cover" section in Chapter 4.
Identify the slot that holds the SIMM you want to replace
by the slot numbers printed beside the memory module
connectors.
Loosen the two captive screws that hold the memory
module retaining bar. Remove the bar.
Grip both ends of the memory module and pull the module
out of its connector. Gently rock the module back and
forth to remove it. If necessary, use the hooked end of the
retaining bar to pull up the edge of the memory module.
Repeat the procedure to remove each SIMM.

Installing a SIMM Module
1.
2.
3.

4.
5.
6.
7.

Always install a SIMM in the lowest-numbered vacant slot.
Never leave an empty slot behind an installed SIMM.
Align the lower edge of the SIMM over the connector with
the notched end of the SIMM toward the power supply.
Push the SIMM connector all the way into the memory
module slot. Gently rock the SIMM back and forth if
necessary.
Repeat steps 1 to 3 to install each SIMM.
Replace the retaining bar and tighten the two captive
screws.
Replace the system unit cover. See the "System Unit Cover"
section in Chapter 4.
Turn on the system unit. Check the power-up self-test
results. Run the cnfg 3 test to verify that the memory
is installed properly. If the power-up self-test reports a
memory error, see Chapter 9.

5–18 Electronic Component Service Operations

NVRAM Module
An optional 1-megabyte NVRAM module (MS02-NV) can be
installed in memory slot 14. The NVRAM module provides a
disk cache for faster system operation when the proper optional
software is installed.
The procedure for removing and installing the NVRAM module
is identical to the procedure for removing and installing the
SIMMs with the following additional rules:
Always install the NVRAM module in memory slot 14.
Install the NVRAM module with the battery toward the
rear of the system unit.

Notch

9 7

5
B 6

9 5

Part number label

B 6

Front view

LEDS (green)
Battery
Notch

Back view
WS3PM063

Figure 5-9. NVRAM module

Electronic Component Service Operations 5–19

Power Supply
The power supply provides 244 watts of DC power to the system
unit Figure 5-10. The back of the power supply has an on/off
switch, the main power connector, and the system-unit-tomonitor connector. The power supply fans draw air through the
system unit enclosure, cooling all components. A green LED on
the front of the power supply glows steadily when the power
supply is operating properly.
The power supply can have part number 30-32506-01 or part
number H7878A. The two power supplies are fuctionally
identical.
System-unit-to-monitor
power connector

On/off switch

Main power connector

Fan assembly

Back view

Power supply
LED (green)

5-volt system
module power cords

12-volt system
module power cord

Front view
WS3PM030

Figure 5-10. Power supply

5–20 Electronic Component Service Operations

Red 5-volt power cord
Black 5-volt ground cord

12-volt power cord

System module
WS3PM029

Figure 5-11. Power supply connections

Electronic Component Service Operations 5–21

Fan assembly
power cord

Fan assembly
power connector

WS3PM028

Figure 5-12. Power supply fan assembly

Removing the Power Supply
1.
2.
3.
4.

Turn off the workstation.
Disconnect the main power cord from the main power
connector.
Remove the system unit cover. See the "System Unit Cover"
section in Chapter 4.
Remove the front cover plate. See the "Front Cover Plate"
section in Chapter 4.

5–22 Electronic Component Service Operations

5.
6.

Disconnect the system module power cords from the
connectors on the base system module.
Loosen the two captive allen screws that hold the power
supply. Slide the power supply tabs out of the system unit
chassis slots.
If the EMI grounding Figure 5-13 clips from the R4000
upgrade kit were installed, remove the clips prior to lifting
out power supply and save for reinstallation with new
power supply.
If this was an up-graded system, when the power supply is
lifted out there will be two finger stocks sitting on the base.
Leave these two finger stocks on the base when installing
the new power supply. See Figure 5-14.
Pull the power supply away from the back of the system
unit and out of the system unit chassis.

To Install the Power Supply
1.
2.
3.
4.

Make sure the power switch is off. (Press down on the 0.)
Position the power supply in the system unit chassis. The
on/off switch should face the back of the chassis.
Tighten the two captive allen screws.
If the EMI grounding clips were installed, reinsert them
between the power supply and chassis. Refer to Figure 5-13
for correct placement of clips.
Reconnect the system module power cords to the connectors
on the base system module. Refer to Figure 5-11
Connect the black cord (5-volt ground) to the connector
farthest from the power supply.
Connect the red cord (5-volt supply) to the center
connector.
Connect the white connector with multiple leads
(12-volt group) to the connector closest to the power
supply.
Install the front cover plate and system unit cover. See the
"Front Cover Plate" and "System Unit Cover" sections in
Chapter 4.

Electronic Component Service Operations 5–23

Connect the main power cord to the main power connector.

On/off switch

System unit
power cord

Back view

Power supply
EMI grounding clips

System
module
power
cords

Captive
allen
screws
(one of two)

Front view
LJ-02967-TI0

Figure 5-13. Removing and installing the power supply

5–24 Electronic Component Service Operations

On/off switch

System unit
power cord

Back view

Power supply
Fingerstock

System
module
power
cords

Captive
allen
screws
(one of two)

Front view
LJ-02975-TI0

Figure 5-14. Finger Stock

Electronic Component Service Operations 5–25

TURBOchannel Option Modules
You can install up to three TURBOchannel option modules
to provide additional functionality to the DECstation 5000
Models 240 and 260. TURBOchannel hardware from Digital
Equipment Corporation and other suppliers includes, but is not
limited to, the following:
Numerous graphics interface options
Ethernet interfaces
SCSI interfaces
Fiber optic data distribution interfaces (FDDI)
Multimedia interfaces
TURBOchannel extender for remote placement of an
oversize graphics module
Any SCSI, Ethernet, or serial controller TURBOchannel option
modules operate in addition to the equivalent functions on the
base system module.
Caution: Always follow antistatic procedures when handling option

modules.

To Remove an Option Module
1.
2.
3.

Turn off the workstation and remove the system unit cover.
See the "System Unit Cover" section in Chapter 4.
Disconnect any cables connected to the rear of the option
module.
If you are replacing an Ethernet option module, remove the
ESAR chip from the old module. Save the ESAR chip for
installation on the new Ethernet option module. See the
"Ethernet Option Module ESAR" section in this chapter.
Remove the screws that hold the option module to the
standoffs and the screws that hold the option module to the
back of the system unit.

5–26 Electronic Component Service Operations

Grip the option module board by the edges at both ends
of the connector and lift the board out of the connector. If
necessary, gently rock the module to loosen it.

Installing an Option Module
1.

3.
4.

If the rear panel opening for the option module is covered
by a blank plate, remove the two screws and remove the
plate.
Position the option module so that its external connector is
in the appropriate opening on the back of the system unit,
and its internal connector is aligned over the corresponding
TURBOchannel option module connector on the base
system module.
Firmly press the option module internal connector down
into the base system module connector.
Insert and tighten the screws that fasten the module to
the back of the system unit and the screws that fasten the
module to the standoffs.
If you are replacing an Ethernet option module, install the
ESAR chip from the old module. See the "Ethernet Option
Module ESAR" section in this chapter. Insert the chip so
that the notch on the top of the chip is toward the back of
the system unit.
Connect the appropriate cable(s) to the back of the option
module.

Electronic Component Service Operations 5–27

LJ-02993-TI0

Figure 5-15. Removing and installing a TURBOchannel option module

Ethernet Option Module ESAR Chip
Every Ethernet TURBOchannel option module has an Ethernet
station address register (ESAR) chip (23-365A1-00), which
provides the Ethernet address of the Ethernet controller. When
you install a new Ethernet option module, remove the ESAR
chip from the old option module and install it on the new one so
the workstation will have the same address on the network.
The base system module also has an ESAR chip. See the "Base
System ESAR" section in this chapter.

5–28 Electronic Component Service Operations

ThickWire
Ethernet
connector

Front view
The notch must face
the back of the module.

ThickWire ESAR chip

ESAR socket

Back view
WS3PM025

Figure 5-16. Ethernet option module ESAR chip

Electronic Component Service Operations 5–29

For Further Information
For information about identifying failed FRUs, see Chapters 8,
9, 10, and 11.
For complete information about console commands, see
Appendix C.
For information about troubleshooting external drives, SCSI
controllers, Ethernet controllers, and TURBOchannel option
modules, refer to the TURBOchannel Maintenance Guide.

5–30 Electronic Component Service Operations

6
Storage Drives
This chapter discusses the requirements for using small
computer system interface (SCSI) storage drives with the
DECstation 5000 Models 240 and 260.

Storage Drives 6–1

SCSI Requirements
The following requirements apply to SCSI drives connected to
base system or TURBOchannel option SCSI controllers.
A base system or TURBOchannel SCSI controller can
support up to seven drives.
SCSI drives are always linked in a daisy chain. Each drive
has two connectors. The first drive in the chain is connected
to the SCSI controller and to the second drive. The last
drive in the chain must have a SCSI chain terminator
(12-30552-01) installed on the second connector.
An exception to the preceding requirement is the
TURBOchannel Extender (TCE). The TCE has only one
external SCSI connector and does not need an external
chain terminator. When the TCE is used as a SCSI
expansion box, it must be last in the SCSI chain. Because
the system-unit-to-TCE cable is only 16 inches (40 cm)
long, be careful to arrange the SCSI expansion boxes to
accomodate the cable.
Each drive in a SCSI chain must have a SCSI ID number
from 0 to 6 that is unique in the chain. No two drives in
a chain can have the same SCSI ID number. A SCSI
controller, whether on the base system module or a
TURBOchannel option module, always has SCSI ID
number 7. If two numbers are the same, one must be
changed. Refer to the drive documentation for information
about how to change the SCSI ID.
Normal SCSI protocol requires that a SCSI controller terminator (12-33626-01) be installed if no drives are present.
However, the DECstation 5000 Models 240 and 260 base
system SCSI controllers have a built-in SCSI controller
terminator. Even if no drives are installed, it is not
necessary to install a terminator on the SCSI controller
connector. If a TURBOchannel option module SCSI
controller is installed, the requirement for a terminator
applies to the option module.

6–2 Storage Drives

As a rule of thumb, you should install no more than three
external expansion boxes supplied by Digital Equipment
Corporation in one SCSI chain. Any external expansion
box, regardless of the number of drives it contains, counts
toward this total of three boxes. Of course, the overall total
of seven drives must never be exceeded.
The length of all external and internal cables connecting
the drives in a chain must not exceed 236 inches (6 meters).
SCSI Cable Lengths
Use the cable lengths in Table 6-1 to compute the total SCSI
cable length for any combination of expansion boxes supplied by
Digital Equipment Corporation.
Table 6-1. SCSI Cable Lengths
Cable or Box

Base system SCSI controller and internal
bus
BA40 storage expansion box internal cable
BA42 storage expansion box internal cable
RRD40 optical compact disk drive internal
cable
TLZ04 tape drive internal cable
TK50Z internal cable
System-unit-to-TCE cable
TCE internal cable
50-pin to 50-pin box-to-box external cable
50-pin high-density to 50-pin system-unit-toexpansion-box external cable

Cable Length
inches

132

14
31
6.5

36
79
16.5

38
14
26
52
26
38

97
36
66
132
66
96

Storage Drives 6–3

For Further Information
For information about troubleshooting the SCSI controllers and
drives, see Chapters 8, 9, 10, and 11.
For information about individual SCSI drives, refer to the
documentation for the individual drive.
For information about TURBOchannel option module SCSI
controllers, refer to the TURBOchannel Option Module
Maintenance Guide.
For information about the SCSI drive terminator, see the "SCSI
Chain Terminator" section in Chapter 4.
For information about the SCSI controller terminator, see the
"SCSI Controller Terminator" section in Chapter 4.

6–4 Storage Drives

7
Keyboards and Pointing Devices
This chapter discusses the devices through which the user
communicates with the DECstation 5000 Models 240 and 260
workstations. When the system is used as a workstation, the
input device configuration is one keyboard plus one of the
following pointing device configurations:
One mouse
One tablet with puck
One tablet with stylus
In addition, one of the following configurations can be installed:
Lighted programmable function keyboard (LPFK) device
Programmable function dials (PFD) device
One LPFK plus one PFD
When the system is configured as a server, the user input and
output devices are a terminal and keyboard connected to serial
communications line 3.

Keyboards and Pointing Devices 7–1

Keyboards
The system supports the following keyboards.
LK401 keyboard
LK421 keyboard
The keyboard is connected to the keyboard-mouse connector on
the rear panel of the system unit through the keyboard-mouse
cable.

LK401 keyboard

LK421 keyboard
WS3PM065

Figure 7-1. Keyboards

7–2 Keyboards and Pointing Devices

Mouse or Tablet
The system supports the following mouse and tablet devices:
VSXXX-GA mouse
VSXXX-AB tablet with stylus
VSXXX-AB tablet with puck
The mouse or tablet is connected to the system unit through
the keyboard-mouse cable that connects to the keyboard-mouse
connector on the rear panel of the system unit. The stylus or
puck connects to the tablet.

Mouse

Tablet

Stylus

Puck

Tablet with puck and stylus
WS3PM018

Figure 7-2. Mouse and tablet

Keyboards and Pointing Devices 7–3

Removing and Installing Input Devices
To Remove the Keyboard, Mouse, and Cable
1.
2.

Pull the mouse or tablet cable connector straight out of the
keyboard-mouse cable connector block.
Pinch the tab that holds the keyboard cable connector
in the keyboard-mouse cable connector block. Pull the
connector straight out of the connector block.
Loosen the screws that hold the keyboard-mouse cable
connector on the rear panel of the system unit. Pull the
cable connector straight out of the system unit connector.

To Install the Keyboard, Mouse, and Cable
1.

Push the keyboard-mouse cable connector straight into the
keyboard-mouse connector on the rear panel of the system
unit. The cable connector fits only one way. Tighten the
two screws on the cable connector.
Position the mouse or tablet cable connector so that the icon
is up and aligned with the mouse icon on the keyboardmouse cable connector block. Push the cable connector
straight into the connector block.
With the tab down, push the keyboard cable connector
straight into the keyboard connector on the keyboard-mouse
cable connector block until the tab snaps into place.
Insert the flap on the keyboard-mouse cable connector block
under the back of the monitor base.

7–4 Keyboards and Pointing Devices

Keyboard-mouse connector

Keyboard-mouse system unit connector

d i g
i t a
l

Keyboard-mouse cable

Mouse cable

Mouse

Keyboard

Keyboard
cable
WS3PM035

Figure 7-3. Removing and installing a keyboard and mouse

Keyboards and Pointing Devices 7–5

LPFK and PFD Devices
The system supports the lighted programmable function key
(LPFK) and the programmable function dials (PFD) options.
Each device is connected to the workstation through one of the
serial ports. For maintenance information about the LPFK and
PFD options, refer to the documentation supplied with these
options.

7–6 Keyboards and Pointing Devices

Part II
Troubleshooting

8
Troubleshooting Overview

Introduction
This chapter provides a brief overview of the tools that are used
when troubleshooting the workstation.
The service engineer will solve each problem differently as logic
dictates. This chapter is an overview of the troubleshooting
tools and techniques. Each of the tools and techniques
mentioned is covered in detail in its own section.
Chapter 9 discusses the information that the field service
engineer uses to identify failed field-replaceable units
(FRUs).
Chapter 10 discusses the tools that the engineer uses to
test the system and its components.
Chapter 11 provides detailed troubleshooting procedures.

Troubleshooting Overview 8–1

Listed below are some of the questions that a service engineer
deals with when working on a system:
What malfunction does the user report?
What malfunction does the service engineer observe?
Have the proper procedures been followed?
Has the system run properly in the past or is it a new
system?
Are the cables and connectors in order?
Is power getting to the system and its components?
Does the screen work?
When the power-up self-test sequence runs, do error
messages appear on the screen or on the diagnostic LED
array on the rear panel of the system unit?
What useful information does the cnfg display provide?
Are the environment variables set properly?
What useful information can the tests and scripts provide?
Is the software version appropriate? If this problem is
suspected, check with the technical support group at Digital
or the module vendor for further information.

Power
If the green LED on the front of the system unit or any of its
peripherals doesn’t light up, the first priority is to get power to
the device. See the "Troubleshooting the Power Supply" section
in Chapter 11.

8–2 Troubleshooting Overview

Self-Tests
Run the self-test sequence:
If an error code is displayed on the diagnostic LED
array but not on the screen, use the LED error code to
troubleshoot. See the "LED Displays" section in Chapter 9.
If one or more error messages appears on the screen,
use the error messages to troubleshoot. See the "Error
Messages" section in Chapter 9 and the "Power-Up SelfTests" section in Chapter 10.
When the console prompt (>>) appears, you can use the
console tests and utilities to get more information. See
Chapter 10.

Configuration Displays
To see the configuration overview display, at the console prompt
(>>) type
cnfg
and press Return.
To view the detailed configuration information for one module,
type
cnfg slot_number
and press Return. Replace slot_number with the number of the
slot where the module is installed. See the "cnfg Command"
section in Appendix C.

Troubleshooting Overview 8–3

Look for the following information:
Does all of the installed hardware appear in the
configuration display? If not, see the "When Hardware
Does Not Appear in the cnfg Display" section in Chapter 11.
Does the right amount of memory appear?
Are the SCSI IDs correct?
Is the firmware version appropriate? If this problem is
suspected, check with the technical support group at Digital
or the module vendor for further information.

Environment Variables
See how the environment variables are set. At the console
prompt (>>) type
printenv
and press Return. See the "printenv Command" and "setenv
Command" sections in Appendix C.
Look for the following information:
Does the boot variable refer to the correct drive and is
the drive working? See the "boot Command" section in
Appendix C.
Is the haltaction variable set as desired, either to autoboot
or to stop in console mode? See Chapter 3 and the "setenv
Command" section in Appendix C.

Tests and Scripts
The base system and the TURBOchannel option modules
contain tests and scripts that can be used to test functions and
components seperately or together.

8–4 Troubleshooting Overview

Tests
To view the tests that are available for a module, at the console
prompt (>>) type
t slot_number/?
and press Return. Replace slot_number with the number of the
slot where the module to be tested is installed.
Table D-1, "Base System Module Tests and Utilities" in
Appendix D, lists all of the tests for the base system module
and indicates the function assessed by each test.
Scripts
To view the scripts available for a module, at the console
prompt (>>) type
ls slot_number
and press Return. Replace slot_number with the slot where the
module to be tested is installed.
To view the contents of a script, at the console prompt (>>) type
cat slot_number/script_name
and press Return.
Replace slot_number with the slot, replace script_name with the
name of the script.
You can write your own script to assemble a set of tests and
scripts appropriate to a given troubleshooting situation. See the
"To Create a Test Script" section in Chapter 10.

Troubleshooting Overview 8–5

9
Troubleshooting Information
This chapter describes the information available to help you
identify failed FRUs. The types of troubleshooting information
are as follows:
LED displays
Configuration displays
Error messages
Addresses
ULTRIX error logs
Registers
Some of the information, such as exception messages and
power-up self-test error messages, is displayed automatically.
Other information, such as configuration displays, test
error messages, ULTRIX error logs, and registers, must be
specifically generated or accessed by the engineer. ULTRIX
error logs are accessible only in operating mode. All of the
other types of configuration information are accessible only in
console mode. See Chapter 2 for information about console and
operating modes.

Troubleshooting Information 9–1

LED Displays
The following three LED displays provide information about
malfunctions:
Diagnostic LED array
CPU module LEDs
Power supply (DCOK) LED
Diagnostic LED Array
The system runs a series of tests whenever you turn on the
system. If the test sequence fails, the system displays error
messages on the console device and codes on the diagnostic LED
array indicating where in the power-up sequence the system
halted. The LED display is useful when the system cannot
display error messages on the console device. Table 9-1 lists the
LED array patterns and their meanings. See Chapter 11 for
troubleshooting procedures for the various codes.
CPU Module LEDs
A pair of LEDs on the CPU module light up when certain
power-up events occur. When the power-up self-test fails to
complete, the status of the CPU module LEDs implies the
following:
If neither LED lights up, the CPU module is faulty.
If only one LED lights up, the base system module is faulty.
If both LEDs light up, the CPU and base system modules
have completed basic communication operations with each
other.
Power Supply LED
The green LED on the power supply indicates when DC power
is functional. This LED is also referred to as the DCOK LED.

9–2 Troubleshooting Information

Table 9-1. LED Error Codes
LED
Pattern

Hexadecimal
Equivalent

1111 1111

0011 1111
0011 0101

3F
35

0011 0110
0011 0111
0011 1110

36
37
3E

0011 1101

xxxx 1011
xxxx 0011

xB
x3

xxxx 0010

xxxx 0001

0000 0000

Meaning

Initial power-on and hardware
initialization
Firmware initialization
I/O application-specific integrated
chip (ASIC) initialization
Firmware memory test of first 256k
Firmware calculating the cache size
Calibrating millisecond (ms) delay
loop
Power-up versus reset setup code
running, memory and modules
being configured
Loading console from module x
Error reported from module x
during the power-up self-test (pst)
Firmware in module x started to
execute
System software loaded from
module x started to execute
The system detected no errors
during the power-up sequence.

Troubleshooting Information 9–3

Configuration Displays
The configuration displays show what components are installed
in the system. Sometimes hardware does not show up on the
configuration display, or shows up incorrectly. This can be
useful for troubleshooting. You can also use configuration
displays to obtain the following information about the
components:
The amount of RAM installed on a board
Whether an NVRAM module is installed
The Ethernet address of an Ethernet controller
The SCSI ID of SCSI devices
See the "cnfg Command" section in Appendix C.
Note:

The screen output from cnfg command has changed slightly for the
new R4000 CPU module. See the "Detailed Configuration" section of
this chapter, or refer to Appendix C for output examples.

You can request configuration information in either of two
forms:
You can request a configuration overview, which provides
basic information about the hardware installed in all of the
TURBOchannel slots.
You can request detailed information about the hardware in
one particular TURBOchannel slot.

9–4 Troubleshooting Information

Configuration Overview
For the configuration overview, at the console prompt (>>) type
cnfg
and press Return. The following is a typical 240 configuration
overview display:
3:

KN03-AA

DEC

V5.0a

TCF

( 24MB,
1MB NVRAM)
(enet: 08-00-2b-24-5b-82)
(scsi = 7)

24MB, 1MB NVRAM

24 megabytes of RAM and 1 megabyte of NVRAM is
installed on the base system module.

enet: 08-00-2b-24-5b-82

The Ethernet address of the base system Ethernet
controller.
scsi = 7

The SCSI ID of the base system SCSI controller.

Troubleshooting Information 9–5

Detailed Configuration
For detailed information about the hardware in one TURBOchannel
slot, at the console prompt (>>) type
cnfg slot_number
and press Return. Replace slot_number with the slot number of
the module for which you want configuration information.
For example, for detailed information about the base system
module hardware, at the console prompt (>>) type
cnfg 3
and press Return. The following is a typical detailed
configuration display for the base system module with an
R3000 CPU module installed:
3: KN03-AA

DEC

V5.0a

TCF0

( 24MB,
1MB NVRAM)
(enet: 08-00-2b-24-5b-82)
(scsi = 7)
--------------------------------------------------DEV PID
VID REV
SCSI DEV
=== ============= === ===
========
rz1 RZ25 (c) DEC DEC 0500 DIR
rz2 RZ23 (c) DEC DEC 2528 DIR
rz3 RRD42 (c) DEC DEC 1.4a CD-ROM

dcache ( 64 KB), icache ( 64 KB)
mem( 0): a0000000:a07fffff ( 8 MB)
mem( 1): a0800000:a0ffffff ( 8 MB)
mem( 2): a1000000:a17fffff ( 8 MB)
mem(14): a1800000:a18fffff ( 1 MB)
mem(14): clean, batt ok, armed

9–6 Troubleshooting Information

Presto-NVR

The following is a typical detailed configuration display for the
base system module with an R4000 CPU module installed:

>>cnfg 3
3: KN05

DEC

V1.0a

TCF0

( 32 MB)
(enet: 08-00-2b-2d-84-c7)
(SCSI = 7)
--------------------------------------------------DEV
PID
VID
REV
SCSI DEV
===== ================== ========== ====== ========
rz1
RZ25 (c) DEC DEC
0500 DIR
rz2
RZ23 (c) DEC DEC
2528 DIR
rz3
RRD42 (c) DEC DEC
1.4a CD-ROM

cache: I( 8 KB), D( 8 KB), S(1024 KB);
(32 bytes) processor revision (3.0)
mem( 0): a0000000:a07fffff ( 8 MB)
mem( 1): a0800000:a0ffffff ( 8 MB)
mem( 2): a1000000:a17fffff ( 8 MB)
mem( 3): a1800000:a1ffffff ( 8 MB)

Scache line

The previous detailed configuration display example provides
the following information in addition to the configuration
overview:
The three SCSI drives connected to the base system module
are as follows:
rz1 RZ25 (c) DEC DEC 0500 DIR:

An RZ25 drive with SCSI ID 1, manufactured by
Digital Equipment Corporation, is using firmware
version 0500 and is a hard disk drive (DIR).
rz2 RZ23 (c) DEC DEC 2528 DIR:

An RZ23 drive with SCSI ID 2, manufactured by
Digital Equipment Corporation, is using firmware
version 2528 and is a hard disk drive (DIR).
rz3 RRD42 (c) DEC DEC 1.4a CD-ROM:

An RRD42 drive with SCSI ID 3, manufactured by
Digital Equipment Corporation, is using firmware
version 1.4a and is an optical compact disk drive
(CD-ROM).
dcache ( 64 KB), icache ( 64 KB):

The base system module data cache is 64 kilobytes. The
base system module instruction cache is 64 kilobytes.

Troubleshooting Information 9–7

The RAM configuration is as follows:
mem( 0): a0000000:a07fffff ( 8 MB):

Eight megabytes of memory in memory slot 0 are
assigned memory addresses a0000000 to a07fffff.
mem( 1): a0800000:a0fffff ( 8 MB):

Eight megabytes of memory in memory slot 1 are
assigned memory addresses a0800000 to a0fffff.
mem( 2): a1000000:a17fffff ( 8 MB):

Eight megabytes of memory in memory slot 2 are
assigned memory addresses a1000000 to a17fffff.
mem( 14): a1800000:a18ffff ( 1 MB):

Memory slot 14 contains a 1-megabyte NVRAM module.
Addresses a1800000 to a18fffff are assigned to the
NVRAM module.
mem(14): clean, batt ok, armed:

The memory in the NVRAM module is clean, the
battery is okay, and the battery is not turned on.
Additional output from R4000 CPU modules:

cache: I(8 KB), D( 8 KB), S(1024 KB); Scache line (32
bytes)

This line indicates the amount of Instrcution, Data,
Secondary cache, and Scache line size respectively.
processor revision (3.0)

This line indicates the current installed revision of the
R4000 CPU module.

9–8 Troubleshooting Information

Error Messages
An error message can be a test error message, a memory test
error message, or a console exception message. Test error
messages are displayed when an automatic or user-initiated
test fails. Console exception messages are automatically
displayed when console operations fail.
This section describes the following error message types:
Test error messages
Console exception messages
Memory test error messages
Test Error Messages
When a test fails, the message appears on the screen in the
following format:
?TFL slot_number/test_name
(n:description)
[module].
?TFL
slot_number
test_name
n
description
module

Identifies a test error message.
Identifies the module that reported the error.
Identifies the test that failed.
Indicates which part of the test failed.
Describes the failure; the message may include an
address.
Indicates the module identification number.

For an explanation of system and memory module test error
messages, see Appendix D. For information about other
error messages, see Appendix C. For an explanation of
TURBOchannel option module error messages, refer to the
TURBOchannel Maintenance Guide.
This is a typical error message:
?TFL 3/scsi/cntl (3: cnt xfr) [KN03-AA]

Troubleshooting Information 9–9

This error message states that the KN03-AA module in slot number 3,
the base system module, failed the SCSI controller test. The explanation
of the SCSI controller test in Appendix D states that the message (3:
cnt xfr) means the read and write operation reported a mismatch.
Table 9-2 lists the base system tests and the corrective action indicated
when each test is listed in a test error message.
Table 9-2. Base System Test Error Messages
Test Listed in Error
Message

Component Tested

Corrective Action

cache/data
cache/fill
cache/isol
cache/reload
cache/seg
fpu

CPU module

ecc/cor
mem
mem/float10

Memory modules

mem/select

Memory and
system module

misc/halt

System module

misc/kbd

Keyboard and
system module

Replace the CPU module. If
the problem persists, replace
the system module. See the
"CPU Module" and "System
Module" sections in Chapter 5
and the appropriate test section in
Appendix D.
See the "Troubleshooting the
Memory Modules" section in
Chapter 11 and the appropriate
test section in Appendix D.
Replace the memory module that
the test identifies. If the problem
persists, replace the system
module. See the "Memory Modules"
and "Base System Module" sections
in Chapter 5 and the mem/select
test section in Appendix D.
Replace the system module. See
the "System Module" section in
Chapter 5 and the misc/halt test
section in Appendix D.
See the "Keyboard, Mouse, and
Pointing Devices" section in
Chapter 11 and the misc/kbd test
section in Appendix D.
(continued on next page)

9–10 Troubleshooting Information

Table 9-2 (Cont.). Base System Test Error Messages
Test Listed in Error
Message

Component Tested

Corrective Action

misc/mouse

Mouse and
system module

misc/pstemp

Power supply

misc/wbpart

Memory modules

ni/cllsn
ni/common
ni/crc
ni/cntrs
ni/dma1
ni/dma2
ni/esar
ni/ext-lb
ni/int
ni/int-lb
ni/m-cst
ni/promisc
ni/regs
prcache
prcache/arm
prcache/clear
prcache/unarm
scache/data

Base system
Ethernet
controller

See the "Troubleshooting the
Keyboard and Mouse" section in
Chapter 11 and the misc/mouse test
section in Appendix D.
See the "Troubleshooting the Power
Supply," section in Chapter 11 and
the misc/pstemp test section in
Appendix D.
See the "Troubleshooting Memory
Modules" section in Chapter 11
and the misc/wbpart test section in
Appendix D.
See the "Troubleshooting an
Ethernet Controller" section in
Chapter 11 and the appropriate
test section in Appendix D.

NVRAM memory
module

CPU module
R4000 Only

See the "Troubleshooting the
Memory Modules" section in
Chapter 11 and the appropriate
test section in Appendix D.
Replace the CPU module. See the
"CPU Module" section in Chapter 5
and the appropriate test section in
Appendix D.
(continued on next page)

Troubleshooting Information 9–11

Table 9-2 (Cont.). Base System Test Error Messages
Test Listed in Error
Message

rtc/nvr
rtc/period
rtc/regs
rtc/time
scc/access
scc/dma
scc/init
scc/io
scc/pins
scc/tx-rx
scsi/cntl
scsi/sdiag
scsi/target
tlb/prb
tlb/reg

Component Tested

Corrective Action

System module

Replace the system module. See
the "System Module" section in
Chapter 5 and the appropriate test
section in Appendix D.
See the "Troubleshooting a Printer,
Modem, or Other Serial Line
Device" section in Chapter 11
and the appropriate test section in
Appendix D.

Serial line
controllers and
devices attached
to them

Base system
SCSI controller
or device
CPU module

9–12 Troubleshooting Information

See the "Troubleshooting SCSI
Devices" section in Chapter 11
and the appropriate test section in
Appendix D.
Replace the CPU module. See the
‘‘CPU Module’’ in Chapter 5 and
the appropriate test section in
Appendix D.

Memory Test Error Messages
When a memory test detects an error, the message appears on
the screen in the following format:
?TFL 3/mem (n: board xx, MBE = yy, SBE = zz)
?TFL 3/mem
n
xx
yy
zz

Indicates that a memory test failed.
Represents the number of the subtest that failed.
Represents the memory slot where the faulty board is
installed.
Represents the number of multiple-bit errors that occurred.
Represents the number of single-bit errors that occurred.

This is a typical memory test error message:
?TFL:3/mem (1: board 3, MBE = 25, SBE = 6))

In this example:
3/mem
1:
board 3
MBE = 25
SBE = 6

Indicates that the mem test failed.
Indicates that subtest number 1 failed.
Indicates that the SIMM in slot 3 is faulty.
Indicates that 25 multiple bit errors occurred.
Indicates that 6 single bit errors occurred.

Troubleshooting Information 9–13

Console Exception Messages
When a console operation fails, the system displays a console
exception message. When a console exception message appears,
first verify that any command and address that you entered
are valid. If you are sure the command and address are correct
but the console exception still occurs, interpret the message
to determine what caused the exception. For information
about interpreting console exception messages, see the "When
a Console Exception Occurs" section in Chapter 11. For
information about the registers, see Appendix E.
A console exception message can be recognized by the first
line, which always begins with the characters ? PC:. A console
exception message includes some combination of the following
entries:
? PC:
? CR:
? SR:
? VA:
? ER:
? CK:

address
cause
status
virtual address
error address
error syndrome

where:
address represents the address of the exception instruction.
cause represents the value in the cause register.
status represents the contents of the status register.
virtual address represents the virtual address of the

exception.

error address represents the contents of the error address

error syndrome represents the value in the error syndrome

9–14 Troubleshooting Information

The following
example shows a typical value for each of the possible entries of
a console exception message for an R3000 CPU module. In each
entry, the information in brackets (<>) is the decoded version of
the hexadecimal value that precedes it.
Example: Console Exception Message (R3000)

? PC: 0xbfc0d0d <vtr=NRML>
? CR: 0x210c <CE=0,IP6,EXC=DBE>
? SR: 0x30080000 <CU1,CU0,CM,IPL=8>
? VA: 0x0
? ER: 0xd0800006 <VALID,CPU,ECCERR,ADR=2000018>
? CK: 0x8c18c321
<VLDHI,CHKHI=C,SYNHI=18,VLDLO,CHKLO=43,SYNLO=21>

The following
example shows a typical value for each of the possible entries of
a console exception message for an R4000 CPU module. In each
entry, the information in brackets (<>) is the decoded version of
the hexadecimal value that precedes it.
Example: Console Exception Message (R4000)

>>e 0
???
? PC: 0xbfc0cd60 <vtr=TLBM>
? CR: 0x00000008 <CE=0,EXC=TLBL>
? SR: 0x30010002 <CU1,CU0,DE,IPL=8,MODE=KNL,EXL>
? CFG: 0x10410243 <SB=8W,SC=Y,IC=8K,DC=8K,IB=4W,DB=4W,K0=CNC>
? VA: 0x00000000
?
? MB_CS: 0x00008000 <MSK=0,EE,ECC=0>
? MB_INT: 0x001f0000 <>
>>
>>

Troubleshooting Information 9–15

Addresses
Addresses of various types appear in error and exception
messages. These addresses indicate the location of the
malfunction. You use addresses in test commands to indicate
which module or memory location the test is to address.
This section describes the following types of addresses:
Slot numbers
Memory addresses
Hardware physical addresses
Slot Numbers
Test commands and error messages include slot numbers that
identify the hardware to which the test command or error
message refers, as shown in Table 9-3.
Table 9-3. Slot Numbers in Commands and Messages
Slot

Hardware Identified

0
1
2
3

Option module in slot 0 (farthest from the power supply)
Option module in slot 1 (middle option slot)
Option module in slot 2 (nearest the power supply)
Base system hardware, including
System module
CPU module
SIMMs
NVRAM
Keyboard and mouse
Serial communications controller
Base system SCSI controller
Base system Ethernet controller

9–16 Troubleshooting Information

Memory Addresses
When a memory error occurs, the error message contains the
address of the error. You can identify the faulty SIMM by the
address.
Addresses can appear in error messages in several formats, but
you must use the kseg1 format to specify addresses in console
commands. kseg1 format refers to uncached, unmapped address
space. In kseg1 format, the uppermost three bits of the address
are always 101 and the hexadecimal form of the address always
begins with an A or a B. For example, if an address is listed in
an error message as 0x04040404, you would use 0xA4040404
to specify that address in a console command. If an address
is listed in an error message as 0x14040404, you would use
0xB4040404 to specify that address in a console command.
Table 9-4 lists the memory addresses in kseg1 format by slot
number for 8-megabyte and 32-megabyte memory modules.

Troubleshooting Information 9–17

Table 9-4. Memory Module Address Ranges
Memory
Slot

8-Mbyte Module
Address Ranges

32-Mbyte Module
Address Ranges

0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Reserved

Hardware Physical Addresses
The hardware addresses in Table 9-5 appear in ULTRIX error
logs.
Table 9-5. Hardware Physical Addresses
Physical Address Range

Indicated Hardware

0x00000000 to 0x1DFFFFFF
0x1E000000 to 0x1E7FFFFF
0x1E800000 to 0x1EFFFFFF
0x1F000000 to 0x1F7FFFFF
0x1F800000 to 0x1FFFFFFF

RAM
TURBOchannel slot 0
TURBOchannel slot 1
TURBOchannel slot 2
Slot 3: Base system module
(continued on next page)

9–18 Troubleshooting Information

Table 9-5 (Cont.). Hardware Physical Addresses
Physical Address Range

Indicated Hardware

The following addresses are included in the system module address range:
0x1F800000 to 0x1F83FFFF
0x1F840000 to 0x1F87FFFF

0x1F880000 to 0x1F8BFFFF

0x1F8C0000 to 0x1F8FFFFF
0x1F900000 to 0x1F93FFFF
0x1F940000 to 0x1F97FFFF
0x1F980000 to 0x1F9BFFFF
0x1F9C0000 to 0x1F9FFFFF
0x1FA00000 to 0x1FA3FFFF
0x1FA40000 to 0x1FA7FFFF
0x1FA80000 to 0x1FABFFFF
0x1FAC0000 to 0x1FAFFFFF
0x1FB00000 to 0x1FB3FFFF
0x1FB40000 to 0x1FB7FFFF
0x1FB80000 to 0x1FBBFFFF
0x1FBC0000 to 0x1FBFFFFF
0x1FC00000 to 0x1FC3FFFF
0x1FC40000 to 0x1FFFFFFF
0x20000000 to 0x3FFFFFFF
0x40000000 to 0x5FFFFFFF
0x60000000 to 0x7FFFFFFF
0x80000000 to 0xFFFFFFFF
0x1FD00000 to 0x1FD7FFFF

System ROM
Input/output control (IOCTL) registers
and direct memory access (DMA)
pointers
Ethernet address programmable readonly memory and electrically erasable
programmable read-only memory (PROM
/EEPROM)
Ethernet interface
Serial communication chip (SCC)(0)
registers
Reserved
SCC(1) registers
Reserved
Real-time clock
Error address (EA) register (0x1FA40000)
Error syndrome (ES) register (1FA80000)
Control/status (CS) register (0xFAC0000)
SCSI interface
Reserved
SCSI DMA
Reserved
Boot ROM
Reserved
TURBOchannel slot 0
TURBOchannel slot 1
TURBOchannel slot 2
Reserved
MB_interrupt
(continued on next page)

Troubleshooting Information 9–19

Table 9-5 (Cont.). Hardware Physical Addresses
Physical Address Range

Indicated Hardware

0x1FD40000 to 0x1FD7FFFF
0x1FD80000 to 0x1FD8FFFF
0x1FDC0000 to 0x1FDFFFFF

MB_EA
MB_EC
MB_CS

ULTRIX Error Logs
The system records events and errors in the ULTRIX error logs.
Use the memory error logs and the error and status register
error logs to troubleshoot intermittent problems. This section
describes ULTRIX error log formats and error log items that
are useful for troubleshooting.
The ULTRIX error logs are not the same as the test error logs
that appear when you use the erl command from the console
prompt. A test error log is a record of errors reported by tests
run in console mode.
Examining Error Logs
You must be running ULTRIX to examine error logs. At the
ULTRIX prompt (#) type:
/etc/uerf -R | more
and press Return. A full display of ULTRIX error logs, with the
newest error logs first, appears on the monitor.
For information about running ULTRIX, see the "System
Software Management" section in Chapter 2. Information about
the uerf command in the ULTRIX man facility can be obtained
by typing man uerf at the ULTRIX prompt (#).

9–20 Troubleshooting Information

ULTRIX Error Log Format
The first part of each ULTRIX error log describes the type of
error and system conditions in effect when the error occurred.
The format of the first part is the same for all ULTRIX error
logs, regardless of the event type.
The second part of each log provides specific information about
the error and its location. In the second part, the information
available for troubleshooting varies according to the event type.
The first part of all ULTRIX error logs is similar to this
example:
****************** ENTRY

----- EVENT INFORMATION ----EVENT CLASS
OS EVENT TYPE
250.
SEQUENCE NUMBER
5.
OPERATING SYSTEM
OCCURRED/LOGGED ON
OCCURRED ON SYSTEM
SYSTEM ID
x82040230

PROCESSOR TYPE
MESSAGE

******************
OPERATIONAL EVENT
ASCII MSG

ULTRIX 32
Mon Nov 11 10:39:27 1991 PST
GRANITE
HW REV: x30
FW REV: x2
CPU TYPE: R2000A/R3000
KN03
Error count on memory module 0 reached
_2048, resetting count to zero.

Troubleshooting Information 9–21

EVENT CLASS indicates the category of the error. The two
event class categories are operational events and error
events.
Operational events are changes in system operation
that are not errors.
Error events are actual errors in system operation.
OS EVENT TYPE describes the type of error or event recorded
in the log. Table 9-6 lists the operating system event types
and their codes. For information about memory error logs,
error, and status register error logs, see the "ULTRIX Error
Log Event Types" and "Memory Error Logs" sections in this
chapter.
SEQUENCE NUMBER indicates the order in which the system
logged the event.
OPERATING SYSTEM indicates the systems version of
ULTRIX.
OCCURRED/LOGGED ON indicates when the error occurred.
OCCURRED ON SYSTEM identifies the system that reported the
error.
SYSTEM ID includes the following listings:
The first number is the system ID.
HW REV indicates the system hardware revision number.
FW REV indicates the system firmware revision number.
CPU TYPE indicates the type of CPU installed in the
system.
PROCESSOR TYPE indicates the type of processor chip
that the system uses.
The MESSAGE field provides information about the event or
error.

9–22 Troubleshooting Information

ULTRIX Error Log Event Types
The second line of each error log indicates the code number
and event type of the error. Table 9-6 lists the error log event
types.
Table 9-6. Error Log Event Types
Code

Event Type

100
101
102
103
104
105
106
107
108
109
113
130
200
250
251
300
310
350

Machine check
Memory error
Disk error
Tape error
Device controller error
Adapter error
Bus error
Stray interrupt
Asynchronous write error
Exception or fault
CPU error and status information
Error and status register
Panic (bug check)
Informational ASCII message
Operational message
System startup message
Time change message
Diagnostic information

The information in the second part of an error log varies
according to the event type listed on line 2 of the first part of
the error log.
For a detailed explanation of other error logs, refer to
the ULTRIX documentation for the uerf function or the
documentation for the device that the error log discusses.

Troubleshooting Information 9–23

Memory Error Logs
Memory error logs record errors that occur in the memory
modules.
Memory error log example 1

The two examples in this section are two sequential ULTRIX
error log entries that are related to each other. The two entries
were generated when a correctable single-bit error occurred in
the SIMM in slot 0. ENTRY 6 occurred within 1 second after
ENTRY 5.
****************** ENTRY

6. ******************

----- EVENT INFORMATION ----EVENT CLASS
OS EVENT TYPE
250.
SEQUENCE NUMBER
5.
OPERATING SYSTEM
OCCURRED/LOGGED ON
OCCURRED ON SYSTEM
SYSTEM ID
x82040230

PROCESSOR TYPE
MESSAGE

9–24 Troubleshooting Information

OPERATIONAL EVENT
ASCII MSG

ULTRIX 32
Mon Nov 11 10:39:27 1991 PST
GRANITE
HW REV: x30
FW REV: x2
CPU TYPE: R2000A/R3000
KN03
Error count on memory module 0 reached
_2048, resetting count to zero.

****************** ENTRY 5.

******************

----------- EVENT INFORMATION ---------------EVENT CLASS
ERROR EVENT
OS EVENT TYPE
101. MEMORY ERROR
SEQUENCE NUMBER
4.
OPERATING SYSTEM
ULTRIX 32
OCCURRED/LOGGED ON
Mon Nov 11 10:39:27 1991 PST
OCCURRED ON SYSTEM
GRANITE
SYSTEM ID
x82040230 HW REV: x30
FW REV: x2
CPU TYPE: R2000A/R3000
PROCESSOR TYPE
KN03
-------------- UNIT INFORMATION ------------UNIT CLASS
MEMORY
UNIT TYPE
MS02 MEMORY
ERROR SYNDROME
MEMORY CRD ERROR
-------------- KN03 MEMORY REGISTERS ------EPC
x800AFA3C
MEMORY CSR
x00002400
CHECK VALUE x0
32 MB MEM MODULES
ECC ERROR CORRECTION ENABLED
PHYSICAL ERROR ADDR
x010205F8
CHECK SYNDROME
x00308CB4
SYND BITS x34
SINGLE BIT ERROR
CHECK BITS xC
MODULE NUM. x0
ERROR COUNT 3.
INVALID PC MEMINTR

Troubleshooting Information 9–25

A troubleshooter would analyze the error logs in the preceding
examples as discussed here. See Appendix E for detailed
information about memory registers.
The MESSAGE field of ENTRY 6 indicates that more than 2048
single-bit ECC errors have occurred on the memory module
in memory slot 0 and the counter has been reset to zero.
Since the memory error correction feature corrects single
bit errors, this is an operational event, not strictly an error.
ENTRY 5 reports the actual single-bit error that overflowed
the counter, causing it to be reset. The information under
the KN03 MEMORY REGISTERS heading is useful to the
troubleshooter:
SINGLE BIT ERROR indicates that a single-bit correctable
error occurred.
MODULE NUM x0 indicates that the error occurred on the
module in slot 0.
The PHYSICAL ERROR ADDR field indicates the error
address.
The value 32 MB MEM MODULES in the MEMORY CSR field
indicates the size of the memory modules.
ECC memory is designed so that occasional single-bit errors
can occur and correction will take place. If occasional errors
occur on a module, the module should not be replaced. But
if a particular memory module records errors frequently, the
module should be replaced.

9–26 Troubleshooting Information

Memory error log example 2

The memory error log example in this section describes a
multiple-bit uncorrectable error. The module where the error
occurred must be changed.
******************* ENTRY

193. *******************

----- EVENT INFORMATION ----EVENT CLASS
OS EVENT TYPE
SEQUENCE NUMBER
OPERATING SYSTEM
OCCURRED/LOGGED ON
PST
OCCURRED ON SYSTEM
SYSTEM ID

101.
7.

ERROR EVENT
MEMORY ERROR
ULTRIX 32
Tue Jan 7 10:52:18 1992

x82040230

PROCESSOR TYPE

csselab2
HW REV: x30
FW REV: x2
CPU TYPE: R2000A/R3000
KN03

----- UNIT INFORMATION ----UNIT CLASS
UNIT TYPE
ERROR SYNDROME

MEMORY
MS02 MEMORY
MEMORY RDS ERROR

----- KN03 MEMORY REGISTERS ----EPC
MEMORY CSR

x8011995C
x00002400

PHYSICAL ERROR ADDR
CHECK SYNDROME

x00FD5ECC
x800080B5

CHECK VALUE x0
32 MB MEM MODULES
ECC ERROR CORRECTION ENABLED
SYND BITS x35
SINGLE BIT ERROR
CHECK BITS x0
MODULE NUM. x0
ERROR COUNT 0.

The ERROR SYNDROME field describes the error. The value
in that field (MEMORY RDS ERROR) indicates that a multi-bit
uncorrectable error occurred.
The information under the KN03 MEMORY REGISTERS heading
provides the following useful information:
The value NUM. x0 in the fourth line of the CHECK
SYNDROME field indicates that the error occurred on the
module in slot 0.
The PHYSICAL ERROR ADDRESS field indicates the error
address.
The value 32 MB MEM MODULES in the second line of
the MEMORY CSR filed indicates the size of the memory
modules.

Troubleshooting Information 9–27

Replace the indicated memory module. Multi-bit errors are not
correctable, and will cause processes and the system to crash.

Registers
The system automatically displays CPU register information in
the console exception message when console exception occurs.
To access system registers, from the console prompt (>>) type
e console_address
and press Return.
Replace console_address with the address of the register that
you want to examine. Use the kseg1 format for the address.
For information about the kseg1 format, see the "Memory
Addresses" section in this chapter. For complete register
information, see Appendix E. For information about the e
command, see the "e Command" section in Appendix C.

For Further Information
To determine the corrective action indicated by a particular
error message, refer to Chapter 11.
For an explanation of other error logs, refer to the ULTRIX
documentation for the uerf function.
For an explanation of error logs for SCSI devices, refer to the
documentation for the device described in the error log.

9–28 Troubleshooting Information

10
Troubleshooting Tools
This chapter discusses the system troubleshooting tools. It
explains how to
Run tests
Use test scripts

Troubleshooting Tools 10–1

Console Mode
You have to be in console mode to perform maintenance
operations, such as the following:
Run diagnostic tests
Read error messages
Set environment variables
Display hardware configurations
See the "Console Mode" section in Chapter 2
Note: You have to be in operating mode to use ULTRIX error logs.

Alternate Terminal
If the system monitor is not working properly, install an
alternate terminal to run tests and read error messages. See
Chapter 3 for details about installing an alternate terminal.

Tests
The read-only memory (ROMs) on the base system module
(R3000), on the R4000 CPU module, and on the TURBOchannel
option modules contain numerous tests that verify the functions
of the system. Tests can be used in the following ways to check
system hardware operation:
The automatic power-up self-test scripts run a
comprehensive set of individual tests on the system and
option module hardware.
You can run individual tests in console mode to test specific
system and option module functions.
You can run one of several prepared scripts or create a
script of your own, containing any set of tests that you find
appropriate.

10–2 Troubleshooting Tools

Slot Numbers in Test Commands and Error Messages
Test commands and error messages use slot numbers to identify
the hardware to which the command or message refers.
Slot 3 always refers to the base system hardware, which
includes the following:
System module
CPU module
Memory modules (SIMMs and NVRAM)
Base system Ethernet controller
Base system SCSI controller
Serial line controllers
Slot 0 refers to the TURBOchannel option slot farthest from
the power supply.
Slot 1 refers to the middle TURBOchannel option slot.
Slot 2 refers to the TURBOchannel option slot nearest to
the power supply.
Figure 10-1 shows the physical location of the base system and
option module hardware that occupies each slot number.

Troubleshooting Tools 10–3

PMAG-C

Slot number 0

Slot number 1

Slot number 2

refers to

the module in

option slot 0.

option slot 1.

option slot 2.

PMAG-C

V~100-120
A 3.0
V~220-240
A 1.7

V~100-120/2
A 7.9/4.2

20-240

Hz 50-60
W 359

Slot number 3 refers to the base module and all
of its on-board functions, including the base
system SCSI and the Ethernet controllers, the
signal ports, the memory modules, and the
keyboard and mouse function.

2
WS3PM021

Figure 10-1. Slot numbers for system hardware

10–4 Troubleshooting Tools

Power-Up Self-Tests
When you turn on the system power, the system automatically
runs a power-up self-test script. The monitor and the diagnostic
LED array report any errors the power-up self-tests detect.
Self-test error codes are discussed in the "Error Messages"
section in Chapter 9 and in Appendix D.
You can specify a quick or a thorough power-up self-test script
to run when the system powers up.
The quick script, usually specified for normal power-up, is a
limited script that allows the system to boot quickly.
The thorough script runs an extensive check of system
hardware. The thorough script is most useful for field
service troubleshooting. Some tests in the thorough script
require loopbacks on the external connectors.
To select a power-up self-test script, use the setenv command to
set the testaction environment variable. Type:
setenv testaction (q | t)
and press Return. The vertical bar ( | ) means that you choose
one of the alternatives. In this case,
Type setenv testaction q to select the quick test.
Type setenv testaction t to select the thorough test.
You can use the powerup script to run the power-up selftests without turning the power off and on again. To run the
powerup script, at the console prompt (>>) type:
powerup
and press Return.

Troubleshooting Tools 10–5

Console Mode Tests
From the console prompt (>>), use the t command to run an
individual test or the sh command to run a test script. To see
a list of available console commands and their formats, at the
console prompt (>>), type:
?
and press Return. Appendix C describes the console commands
in detail.
Using the t Command
To run an individual test, from the console prompt (>>) type:
t [-l] slot_number/test_name [arg1] [...] [argn]
and press Return.
t
-l

slot_number
test_name
arg1...argn

10–6 Troubleshooting Tools

Indicates the test command.
Causes the test to loop until you press Ctrl-c or reset the
system by pushing the Halt button or by switching the
power off and then on.
Replace with the slot number of the module to be tested.
Replace with the name of the test to be run.
Specify individual test conditions.

Table 10-1. Slot Numbers in Test Commands
Slot
Number

Component Tested

0
1
2
3

Option module in slot 0 (farthest from the power supply)
Option module in slot 1 (middle option slot)
Option module in slot 2 (nearest the power supply)
Base system hardware, which includes
System module
CPU module
Memory modules (SIMMs and NVRAM)
Base system SCSI controller
Base system Ethernet controller
Serial line controllers

Troubleshooting Tools 10–7

To display a list of available tests

To display a list of tests available for a module, from the console
prompt (>>) type:
t slot_number/?
and press Return. Replace slot_number with the number of the
slot where the module is installed. A display similiar to this
appears on the monitor:
cache/data
cache/isol
cache/reload
cache/seg
fpu
mem
mem/init
mem/float10
mem/select
mfg/done
misc/pstemp
misc/wbpart
rtc/nvr
rtc/period
rtc/regs
rtc/time
tlb/prb
tlb/reg

I or D[D]
I or D[D]
I or D[D]
I or D[D]

address[80050000]
address[80050000]
address[80050000]

board[0]

thrsld[10]

pattern[55555555]

address[A0100000]

pattern[55]

pattern[55555555]

The first column lists the names of the tests available for
the module in the slot that you specified.
Entries in the other columns are individual test
parameters. The value in brackets next to each parameter
is the default value for that parameter.

10–8 Troubleshooting Tools

Common Tests
This section briefly describes the following frequently used
tests:
SCSI controller test
SCSI send diagnostics test
Ethernet external loopback test
Transmit and receive test
Pins test
Appendix D describes the base system module tests and their
parameters and error messages in detail. For information about
the TURBOchannel module tests, refer to the TURBOchannel
Maintenance Guide.
SCSI controller (cntl) test

The cntl test tests the operation of a SCSI controller. For
example, to run the controller test on the base system SCSI
controller, at the console prompt (>>) type:
t 3/scsi/cntl
and press Return. For information about SCSI controller
test error messages, see the "SCSI Controller Test" section in
Appendix D.
SCSI send diagnostics (sdiag) test

The sdiag test runs the self-test for an individual SCSI device.
For example, to run the SCSI send diagnostics test on device
0 connected to the base system SCSI controller, at the console
prompt (>>) type:
t 3/scsi/sdiag
and press Return. For information about sdiag test parameters
and error messages, see the "SCSI Send Diagnostics Test"
section in Appendix D.

Troubleshooting Tools 10–9

Ethernet external loopback test

The Ethernet external loopback test tests an Ethernet
controller and its connections. First install a ThickWire
loopback connector on the external connector of the controller
to be tested. Then, enter the xternal loopback test command.
For example, to test the base system Ethernet controller, at the
console prompt (>>) type:
t 3/ni/ext-lb
and press Return. For information about external loopback
test error messages, see the "SCSI Controller Test" section in
Appendix D.
SCC transmit and receive test

The SCC transmit and receive test tests the transmit and
receive function of a serial port. First, install a communications
adapter with an MMJ loopback connector on the serial
connector to be tested, then enter the SCC transmit and receive
test command. For example, to run the internal loopback test
on serial line 3, at the console prompt (>>) type:
t 3/scc/tx-rx 3 int
and press Return. For information about the SCC transmit and
receive test format and error messages, see the "SCC transmit
and receive test" section in Appendix D.
SCC pins test

The SCC pins test tests the pins on a serial communications
connector. First, install a modem loopback connector on the
communications connector, then enter the SCC pins test
command. For example, to test serial line 3 using a 29-24795
loopback connector, at the console prompt (>>) type:
t 3/scc/pins 3 29-24795
and press Return. For information about the SCC pins test
format, the pins tested by the different loopback connectors,
and the pins test error messages, see the "SCC Pins Test"
section in Appendix D.

10–10 Troubleshooting Tools

Test Scripts
The ROM for each module contains preprogrammed test scripts.
A test script is a short program that includes a list of individual
tests and other test scripts. When you run a test script, the
system automatically runs the included tests and scripts in
order.
Use the sh command to run a test script. To run a test script
once and then stop, at the console prompt (>>) type:
sh slot_number/test_script
and press Return. Replace slot_number with the slot number of
the module that you want to test. Replace test_script with the
name of the test script that you want to run.
For example, to run the quick pst test script on the option
module in slot 1, at the console prompt (>>) type:
sh -1/pst-q
and press Return.
To have a test script keep looping until you press Ctrl-c, at the
console prompt (>>) type:
sh -l slot_number/test_script
and press Return.
For detailed information about scripts, see the "script
Command" and "sh Command" sections in Appendix C.

Troubleshooting Tools 10–11

To Display a List of Available Scripts
To display a list of scripts available for a module, from the
console prompt (>>) type:
ls slot_number
and press Return. Replace slot_number with the slot number of
the module.
This is a partial listing of the scripts in the base system module:
28
28
24
24
28
32
28
304
44
36
28
192
272
196
96
121
2401
132
1928
868
124
60
268
80
184
196
88
40
104
88

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

10–12 Troubleshooting Tools

cnfg -> code
boot -> code
rst-q -> rst
rst-t -> rst
rst-m -> powerup
test-ni-m -> test-ni-t
init -> code
powerup
reset
halt-r
halt-b
pst-m
pst-q
pst-t
tech
test
test-cache
test-cpu
test-scc-m
test-scc-t
test-crt
test-misc
test-mem-m
test-mem-q
test-mem-t
test-ni-t
test-rtc
test-scsi
rst
cnsltest

To Display the Contents of a Script
To see which individual tests and other test scripts are in a
specific test script, at the console prompt (>>) type:
cat slot_number/script_name
and press Return. Replace slot_number with the slot number
of the module. Replace script_name with the name of the test
script for which you want a listing.
The system displays a list of the individual tests and any other
test scripts that are in the test script. The following example
shows the cat command and the resulting listing of the contents
of the test-rtc test script for slot 3 (the base system module):
>>cat 3/test-rtc
t ${#}/rtc/regs
t ${#}/rtc/nvr
t ${#}/rtc/period
t ${#}/rtc/time

In the listing of a test script, the character # represents the slot
number of the module where the script resides.
The cat command displays the contents of test scripts only. It
does not display the contents of other objects.
For further information about the cat command, see the "cat
Command" section in Appendix C.

Troubleshooting Tools 10–13

To Create a Test Script
You can create a test script to test modules under conditions
you choose.
1.

At the console prompt (>>), type:
script script_name

3.
4.

and press Return. Replace script_name with the name you
want to give the script you are creating.
Type the test commands for the tests that you want to
include in the script.
Type test commands in the same order that you want
the tests to run. You can include individual tests and
test scripts.
Specify any test parameters that you want to include
with each entry.
Press Return after you finish typing each individual
test command.
To finish creating the test script, press Return twice after
you enter the last test command in the test script.
To run the script you just created, type:
sh script_name
and press Return. Replace script_name with the name you
assigned the script.

The system stores the test script in volatile memory (RAM).
The test script is lost when you turn off the system unit or halt
the system with the Halt button. You can store only one script
at a time.
If you use the ls command to list the test scripts for the base
system, the test script you created appears in the test script
list.

10–14 Troubleshooting Tools

11
Troubleshooting Procedures
This chapter provides a set of flow charts and checklist
troubleshooting procedures that are designed to help the field
service engineer to identify failed FRUs logically and efficiently.
Table 11-1 lists the troubleshooting procedures in this chapter.

Troubleshooting Procedures 11–1

Table 11-1. Troubleshooting Procedures
Procedure

Page

Figure

Comment

Troubleshooting
guide

11-5

11-1
11-2

Provides an overview of basic
troubleshooting procedures;
points to other procedures

When the powerup self-test does
not complete

11-8

When the LED
display is
1111 1111 (FF)
0011 1111 (3F) or
0011 1000 (35)

11-9

When the LED
disply is
0011 1110 (3E)
0011 1101 (3D)
0011 0111 (37) or
0011 0011 (33)

11-12

11-6

Outlines responses
to CPU, base system,
memory, and
TURBOchannel option
module malfunctions

When the LED
display is 0011
0110 (36)
When the LED is
0010 0010 (22)
0001 0010 (12)
0000 0010 (02)
0010 0011 (23)
0001 0011 (13) or
0000 0011 (03)

11-13

11-7

Outlines responses to memory
module malfunctions

11-14

11-8

Outlines responses
to 2D and 3D
graphics accelerator
TURBOchannel opltion,
and base system module
malfunctions

points back to this table

11-3
11-4
11-5

Outlines responses to
CPU, base system, and
TURBOchannel option
module malfunction

(continued on next page)

11–2 Troubleshooting Procedures

Table 11-1 (Cont.). Troubleshooting Procedures
Procedure

Page

Figure

Comment

When the LED
display is
0011 1011 (3B)
0010 1011 (2B)
0001 1011 (1B) or
0000 1011 (0B)

11-15

11-9
11-10

Outlines responses to
console controller or
display functions

When the monitor
has no display

11-17

11-11
11-12

Outlines responses to display
malfunctions

When an error
messge appears on
the monitor

11-19

Tells how to interpret error and
exception messages

When a console
exception occurs

11-21

Tells how to interpret console
exception messages

When hardware
does not appear in
the
cnfg display

11-25

11-13
11-14

Outlines responses
to various module

11-15

malfunctions
(continued on next page)

Troubleshooting Procedures 11–3

Table 11-1 (Cont.). Troubleshooting Procedures
Procedure

Page

Figure

Comment

Troubleshooting
memory modules

11-28

11-16

Outlines responses to memory
module malfunctions

Troubleshooting
SCSI devices

11-29

11-17
11-18

Outlines responses
SCSI malfunctions

Troubleshootng an
Ethernet controller

11-31

11-19
11-20

Outlines responses to
Ethernet malfunctions
(continued on next page)

11–4 Troubleshooting Procedures

Table 11-1 (Cont.). Troubleshooting Procedures
Procedure

Page

Figure

Comment

Troubleshooting a
printer, modem,
or other serial line
device

11-33

11-21
11-22

Outlines responses to
serial line malfunctions

Troubleshooting
the power supply

11-35

11-23

Outlines the responses to
power supply malfunctions

When the system
unit overheats

11-36

11-24

Outlines responses to
overheating

Troubleshooting
the keyboard and

11-37

11-25
11-26

outlines responses to
keyboard and mouse
malfunctions

When ULTRIX is
running but the
monitor has no
display

11-39

11-27
11-28
11-29

Outlines respones
display and various
other malfucntions

Troubleshooting
with ULTRIX error
logs

11-42

mouse

Tells how to use ULTRIX
error logs and respond to
intermittent failures; points to
Chapter 9.

Troubleshooting Procedures 11–5

Troubleshooting Guide
Start

Does the power supply

See "Troubleshooting the
Power supply" in this

LED glow green?

Chapter.

Yes

Do the LEDs
flicker but end up at

Yes

something other than

See "LED Displays" in
Chapter 9.

0000 0000?
No

Does a display

appear on the monitor?

See "When the Monitor Has
No Display" in this chapter.

Yes

Does the monitor

Yes

display an error message?
No

Type test

; press Return.

Does the monitor
now display an error
message?

Yes

See "Error Messages" in
in Chapter 9.

(continued)
WS3PM036

Figure 11-1. Troubleshooting guide, 1 of 2

11–6 Troubleshooting Procedures

(continued)
No

Type cnfg, press Return.
Observe the cnfg display.
Type cnfg 3 , press Return.
Observe the cnfg 3 display.

Do the displays show
all memory, options,
and devices?

See "When Hardware Does
Not Appear in the cnfg
Display" in this Chapter.

Yes

See the troubleshooting
figure for the device.

Troubleshoot according to
console error messages.

Yes

See "ULTRIX Error Logs"
in Chapter 9.

Yes

Is the problem in a
specific device, such as
the SCSI or Ethernet?
No

Boot the system.

Is the boot successful?
Yes

Check the ULTRIX
error logs.

Does an ULTRIX error
log record a problem?
No

End
WS3PM037

Figure 11-2. Troubleshooting guide, 2 of 2

Troubleshooting Procedures 11–7

Power-Up Self-Test Does Not Complete
If the console prompt (>>) does not appear on the monitor, the
power-up self-test probably failed to complete. The diagnostic
LED array displays an error code that indicates why the
power-up self-test failed. Table 11-1 lists the troubleshooting
procedure indicated by each diagnostic LED array error code.
The green DCOK LED on the power supply indicates when DC
is functional. In addition, a pair of LEDs on the CPU module
light up when certain power-up milestones occur. When the
power-up self-test fails to complete, the CPU module LEDs
indicate the following:
If neither CPU module LED lights up, the CPU module is
faulty.
If only one CPU module LED lights up, the base system
module is likely to be faulty.
If both CPU module LEDs light up, the CPU module
and the base system module display basic functionality.
Troubleshoot further to determine why the test failed.
The power-up sequence is as follows:
Power on.
2. DCOK LED comes on when 5V and 12V power reach proper
levels.
3. DCOK input to IOCTL ASIC.
4. IOCTL ASIC generates master reset.
5. MB chip on CPU module is reset.
6. MB generates reset for CPU.
7. CPU resets itself and attempts to read base system ROM.
8. MB forwards request to MT.
9. MT generates a TURBOchannel read to the ROM in slot 3.
10. CPU PAL latched signal and CPU module LED one comes
on.
11. IOCTL ASIC pick up read and gets date from ROM.
1.

11–8 Troubleshooting Procedures

12.
13.
14.
15.
16.

ROM returns data to IOCTL ASIC.
IOCTL ASIC places data on TURBOchannel.
CPU PAL latched signal and CPU module LED also comes
on.
Data based by MT to MS to CPU.
First Read complete.

Troubleshooting With LED Codes
Start

See "When the

LEDs = 1111 1111 (FF)
0011 1111 (3F), or

Monitor Has No

0011 0100 (35)

Display" in this
chapter.

Do the LEDs
stop at 1111 1111 ?

Yes

Do the LEDs
stop at 1111 1111
immediately?
Yes

Remove all TURBOchannel
option modules.

(continued)

WS3PM066

Figure 11-3. When the LED display is 1111 1111 (FF), 0011 1111 (3F), or
0011 0101 (35) 1 of 3

Troubleshooting Procedures 11–9

Reinstall the option
modules, one at a time.

Do the LEDs
display 111 111 (FF)
or the same code?

Is this the
last option module?

Yes

Replace the option

Carefully reseat

module. Reinstall the

all modules.

remaining option modules
one at a time.

End
WS3PM067

Figure 11-4. When the LED display is 1111 1111 (FF), 0011 1111 (3F), or
0011 0101 (35) 2 of 3

11–10 Troubleshooting Procedures

Replace the base
system module.

Do the LEDs display

End or

the same code?

troubleshoot

Yes

Replace the
CPU module.

Do the LEDs display
the same code?

End or
troubleshoot

Yes

Call your
support engineer.
WS3PM068

Figure 11-5. When the LED display is 1111 1111 (FF), 0011 1111 (3F), or
0011 0101 (35) 3 of 3

Troubleshooting Procedures 11–11

LEDs = 0011 1110 (3E),
0011 1101 (3D),
0011 0111 (37), or
0011 0011 (33)

Replace the CPU module.

End or

Do the LEDs display the same code?

troubleshoot.
Yes

Remove all TURBOchannel option modules.

End or

Do the LEDs display the same code?

troubleshoot.
Yes

Reduce the system to its minimum configuration
(base system module, CPU module, 1 SIMM).

End or

Do the LEDs display the same code?

troubleshoot.
Yes

Replace the SIMM in slot 0.

End or

Do the LEDs display the same code?

troubleshoot.
Yes

Replace the base system module.

Do the LEDs display the same code?

End or
troubleshoot.

Yes

Call your support engineer.
WS3PM069

Figure 11-6. When the LED display is 0011 1110 (3E), 0011 1101 (3D), or
0011 0111 (37), or 0011 0011 (33)

11–12 Troubleshooting Procedures

LEDs = 0011 0110

Insert a good memory
module into slot 0.

Does the power-up
self-test still stop and the
LEDs display 0011 0110?

Yes
Replace the system module.

No
Replace the remaining
memory modules one at a
time. After each, type
3/mem and the slot number.
Press Return.

End

Replace any modules that
report an error after the
memory test. See
"Memory Test Error
Messages" in Chapter 9.

End
WS3PM040

Figure 11-7. When the LED display is 0011 0110 (36)

Troubleshooting Procedures 11–13

LEDs = 0010 0010 (22),
0001 0010 (12),
0000 0010 (02),
0010 0011 (23),
0001 0011 (13), or
0000 0011 (03)

Find the option module in the slot
number displayed on the left LEDs.

Is the module a 2D or 3D

Replace the

Graphics Accelerator Module?

option module.

Replace the VSIMMs on the module.

End or
Do the LEDs display the same code?

troubleshoot

Yes

Replace the option module.

End or
Do the LEDs display the same code?

troubleshoot

Yes

Replace the base system module.

End or
Do the LEDs display the same code?

troubleshoot

Yes

Call your support engineer.

WS3PM070

Figure 11-8. When the LED display is 0010 0010 (22), 0001 0010 (12),
0000 0010 (02), 0010 0011 (23), 0001 0011 (13), or 0000
0011 (03)

11–14 Troubleshooting Procedures

LEDs = 0011 1011,
0010 1011,
0001 1011, or
0000 1011

Is a TURBOchannel
graphics module installed?

No
A

Yes
No
Is a terminal available?

Replace the graphics
module.

Yes
Remove all graphics modules.

Turn on the system unit
power.

Connect the terminal to the
system unit. Turn on the
terminal and the system unit.
On the terminal keyboard,
type setenv console s.

Troubleshoot according to
the error messages that
appear on the monitor.

Turn off the system unit
power. Reinstall the graphics
module(s). Turn on the
system unit power.

Troubleshoot according to
the error messages that
appear on the terminal.
Replace FRUs as appropriate.

On the terminal keyboard,
type setenv console *
to re-enable the normal
monitor.

End
WS3PM042

Figure 11-9. When the LED display is 0011 1011 (3B), 0010 1011 (2B),
0001 1011 (1B), or 0000 1011 (0B), 1 of 2

Troubleshooting Procedures 11–15

Turn off the system unit
power. Disconnect the
terminal from the system
unit.

Turn on the system unit
power. Check the
diagnostic LEDs.

Does the power-up
self-test complete
successfully?

Yes

The terminal or cable
is faulty. Isolate and
replace the bad part.

No
Is the right LED
display 1011?

Troubleshoot according
to the LED codes.

Yes
Replace the system
module.

WS3PM043

Figure 11-10. When the LED display is 0011 1011 (3B), 0010 1011 (2B),
0001 1011 (1B), or 0000 1011 (0B), 2 of 2

11–16 Troubleshooting Procedures

Monitor Has No Display
Start

Is the monitor power
indicator on?

Yes

Make sure the monitor has
power and is turned on.

Is the monitor power
indicator on?
No

Yes

See the monitor service
guide.

Is the green system unit
power supply LED on?

Make sure the system unit
has power and is turned on.

Yes
Yes

Is the green system unit
power supply LED on?
No

Make sure the video cable is
connected correctly at both
ends.

See "Troubleshooting the
Power Supply" in this
chapter.

(continued)
WS3PM044

Figure 11-11. When the monitor has no display, 1 of 2

Troubleshooting Procedures 11–17

(continued)

Is there a display on
the monitor now?

Yes

Troubleshoot according to
the error messages that
appear on the monitor.

Yes

See "LED Displays" in
Chapter 9.

No
Do the diagnostic LEDs
display an error code?
No
Does the power-up
self-test display an
error message on
an alternate terminal?

Yes

Troubleshoot according to
the error messages.

No
Replace the video cable.

Is there a display on
the monitor?

The monitor is probably
faulty. See the monitor
service guide.

Yes
End
WS3PM045

Figure 11-12. When the monitor has no display, 2 of 2

11–18 Troubleshooting Procedures

When an Error Message Appears on the Monitor
In console mode, the monitor dislpays error and exception
messages.
Messages that begin with ?TFL describe errors or
exceptions that occur during tests.
Messages that begin with ?PC followed by several lines that
begin with question marks (?) describe console exceptions.
Test Exception Messages
Messages that include CUX or UEX followed by the word cause
and a string of numbers describe exceptions that occurred
during a test.
Test exception messages have the form
?TFL: slot_number/test_name (CUX|UEX, cause=xxxxxxxx) [KN03-AA]

?TFL: slot_number/test_name indicates that a test

reported an exception.

?TFL: indicates that a test failed.
slot_number represents the slot number of the module
in which the exception occurred.
test_name represents the name of the test that
reported the exception.
CUX or UEX indicates that the error is an exception.
xxxxxxxx represents the contents in the cause register
when the exception occurred.
[KN03-GA] is the CPU module identifier.

To troubleshoot when an exception occurs during a test,
interpret the value in the cause register. Appendix E describes
the cause register.
Messages that do not include CUX or UEX describe hardware
errors detected by tests.

Troubleshooting Procedures 11–19

Test Error Messages
Error messages that appear on the monitor have the form
?TFL slot_number/test_name (description)
slot_number represents the slot number of the FRU that

reported the failure.
test_name represents the name of the individual test that
failed.
description represents a detailed description of the error.
If the slot number listed in the error message is 0, 1, or 2, the
probable failed FRU is a TURBOchannel option module. Refer
to the TURBOchannel Maintenance Guide to troubleshoot.
If the slot number listed in the error message is 3, the probable
failed FRU is in the base system hardware. The individual test
listed in the message is the test that reported the error.
For more information about the error messages, see "Test error
messages," section in Chapter 9. Table 9-2, "Base System Test
Error Messages" lists the corrective action indicated by each
error message for the base system module. For details about a
specific error message, refer to the section in Appendix D that
discusses the individual test listed in the error message.

11–20 Troubleshooting Procedures

When a Console Exception Occurs
When a console operation fails, the system displays a console
exception message. When a console exception message appears,
first verify that any command and address that you entered
are valid. If you are sure the command and address are correct
but the console exception still ocurs, interpret the message to
determine what caused the exception. For an explanation of the
registers, see Appendix E.
A console exception message (R3000 only) includes some
combination of the following entries:
? PC:
? CR:
? SR:
? VA:
? ER:
? CK:

address
cause
status
virtual address
error address
error syndrome

exception.

error address represents the contents of the error address

error syndrome represents the value in the error syndrome

Troubleshooting Procedures 11–21

Example: Console Exception Message
The following R3000 example shows a typical value for each
of the possible entries of a console exception message. In each
entry, the information in brackets is the decoded version of the
hexadecimal value that preceeds it.
? PC:
0xbfc0d0d<vtr=nrml>
? CR:
0x210<ce=0,ip6,exc=dbe>
? SR:
0x30080000<cu1,cu0,cm,ipl=8>
? VA:
0x0
? ER:
0x0800006 <valid, cpu, eccerr, adr=2000018>
? CK:
0x8c18c321
<vldhi, chkhi=c, synhi=18, vldlo, chkllo=43, synlo=21>

The last term in the second line, the EXC = value, indicates
what type of exception occurred.
If the EXC = value is MOD, TLBL, or TLBS, an address used in a
console command was probably invalid.
The ? VA value is the virtual address that caused the exception.
Retype the console command, using addresses in the following
ranges only:
80000000 to 9FFFFFFF (cached memory)
A0000000 to BFFFFFFF (uncached memory)
If the exc= value is AdEL or AdES, a console command probably
attempted access on a boundary that was not a word. The ? VA
value is the virtual address used in the console command. To
correct the exception:
1.
2.
3.

Retry the command with an address that starts on a word
boundary.
If access still fails, turn the system unit power off and then
on again to restart console mode.
If an exception still occurs, type test and press Return.
Interpret any errors that the test script reports to identify
the faulty hardware.

11–22 Troubleshooting Procedures

If the exc= value is IBE or DBE, a bus error occurred. The bus error is
either a memory error or a timeout.
Suspect a timeout error if either of the following conditions
exist:
The ? ER and ? CK entries do not appear in the console
exception error message.
The value of the ecc error bit (bit 28) in the error
address register is 0.
If neither of the conditions indicating a timeout error exist,
suspect a memory error.
Troubleshoot a timeout error as follows:
1.
2.

Verify that your console command was entered properly.
If the adddress in your console operation was in the range
of a particular slot, type slot_number/pst-t, replacing slot_
number with the number of the slot in question. If the test
fails, replace the module in the indicated slot. See Table
9-5 for hardware address ranges. If the pst-t test passes
and the console exception still occurs, go to step 3.
If the address in your console operation was in the range
of a particular subsystem on the base system module
(such as the base system SCSI controller), type ls 3 to
see a list of available tests for the base system module.
Run the appropriate test (for example: test-scsi). If the
subsystem test fails, use the address information on the
error message to determine what item to replace. See
Table 9-5 for hardware address ranges. See Appendix D
for information about the base system module tests. If the
subsystem test passes and the console exception still occurs,
go to step 4.

Troubleshooting Procedures 11–23

If the pst-t or subsystem test passes, or if you cannot tell
what address is causing your console operation to fail, and
the console exception still occurs, run the thorough powerup
self-test sequence by typing test. The thorough test can
take 30 minutes to run, depending on your memory and
option configurations. If the test fails, use the information
in the error message to determine what item to replace.
See Appendix D for information about the base system
module tests. If the thorough test passes, and the console
exception still occurs, call your support engineer.

Troubleshoot a memory error as follows:
1.

Run the memory test for all slots. Type t 3/mem * and
press Return. As the test runs, the system displays a
rotating cursor and the number of the slot currently being
tested. With large amounts of memory, the mem * test can
take more then 15 minutes to run.
Replace the SIMM or NVRAM module identified in any
mem test error message(s).

See the "mem Test" section of Appendix D for information about
the memory test.

11–24 Troubleshooting Procedures

When Hardware Does Not Appear in the cnfg Display
Start

Type

cnfg, press Return.

Type

cnfg 3, press Return.

Is a memory module

Look for the missing memory
Yes

missing from the cnfg

module. Reseat any
memory module(s) that do

or cnfg 3 display?

not appear in the display.
No

C
(Continued)

Is a SCSI controller or

Yes

Check that the first device
in the bus is properly

device missing from the

connected.

cnfg or cnfg 3 display?

Cycle power.

No
Yes

Does the device appear
in the cnfg or cnfg 3
display now?
No

A
(Continued)

B
(Continued)

WS3PM046

Figure 11-13. When hardware does not appear in cnfg display, 1 of 3

Troubleshooting Procedures 11–25

(Continued)

Replace the cable from the
SCSI controller to the first
device. Cycle power.

Is the SCSI controller or
device still missing from
the display?
Yes

Replace the SCSI controller.

Is a SCSI device
missing from the cnfg or
cnfg 3 display?

Yes

No
End

Make sure the power is on
and all cables are
connected properly.
Change the SCSI ID for the
missing device to an
unused ID between 0 and 6.
Cycle power.

Type init slot_number.
Press Return.

Yes

End

Does the device
appear in the cnfg or cnfg3
display now?
Cycle Power.
No
Replace the drive.

WS3PM047

Figure 11-14. When hardware does not appear in cnfg display, 2 of 3

11–26 Troubleshooting Procedures

(Continued)
C

Is a memory module

still missing from the cnfg
or cnfg 3 display?
End

Yes

Move the module that is
missing to another slot.

Is the module still
missing from the cnfg

Yes

Replace the memory module.

or the cnfg 3 display?
No

Replace the system module.

WS3PM048

Figure 11-15. When hardware does not appear in cnfg display, 3 of 3

Troubleshooting Procedures 11–27

Troubleshooting the Memory Modules
For information about memory test error messages, see
"Memory Test Error Messages" in Chapter 9.
Start

Interpret any error messages
to determine which memory
modules reported an error.

Replace those memory
modules that report an error.

Yes

Replace the base system
module.

Do all memory modules
report an error?
Yes

Remove all the memory
modules.

Insert a good memory
module in slot 0. Repeat the
memory test.

Does the memory test
still report an error?
No

Install any additional memory
modules, one at a time. Run
the memory test for each new
module.

Replace any memory
modules that report an error.

End
WS3PM049

Figure 11-16. Troubleshooting memory modules

11–28 Troubleshooting Procedures

Troubleshooting SCSI Devices
For information about SCSI tests and error messages, see
"SCSI Tests" in Appendix D.
Start

Type cnfg slot_number.
Press Return.

Does the drive appear in
the cnfg display?

Check that all cables are
connected to the drive and
that there is a terminator on
the last external drive in the
bus.

Yes

Make sure each drive in the
SCSI bus has a unique ID
from 0 to 6.

(continued)

Type init slot_number.
Press Return.
Yes
End

Does the drive appear in
the cnfg display now?
No

Replace the drive.

WS3PM050

Figure 11-17. Troubleshooting SCSI devices 1 of 2

Troubleshooting Procedures 11–29

(continued)
Replace the SCSI controller
Does the cntl test report

Yes

that has the slot number
that appears in the error

an error?

message.
No

Troubleshoot according to
Does the sdiag test report

Yes

the sdiag test error
messages. See the SCSI

an error?

drive service guide.
No
End

Replace the SCSI controller
in the slot number listed in
the error message.

Yes

Does the sdiag test still
report an error?
No
End

WS3PM051

Figure 11-18. Troubleshooting SCSI devices 2 of 2

11–30 Troubleshooting Procedures

Troubleshooting an Ethernet Controller
For information about Ethernet tests and error messages, see
"Ethernet Tests" in Appendix D.

Start

Does an error message
list an Ethernet test as
the test that failed?

Yes

End

Does the customer
describe a specific
Ethernet problem?
Yes

Run the Ethernet test script.
Type sh slot_number/
test-ni-t . Press Return.
Yes

Does an Ethernet test
report an error?
No

(continued)

Analyze the problem that
the customer describes.
Use any other resources
as necessary to resolve
the problem.

WS3PM052

Figure 11-19. Troubleshooting Ethernet controller, 1 of 2

Troubleshooting Procedures 11–31

(continued)

Is ext or ni/ext the test
that reported the error?

Replace the Ethernet
controller in the slot number
listed in the error message.

Yes

Run the external loopback
test. Type t slot_number/
ext-lib. Press return.

Does the external
loopback test
report an error?

Reconnect the system to
the network.

Yes

Does the Ethernet
work properly now?

Yes

End

Replace Ethernet
connection parts, such as
the cable and adapter, to
isolate the faulty part.
Involve other resources as
necessary to resolve the
problem.
Check that the external
loopback connector is
connected. Repeat the
external loopback test.

Does the external
loopback test still fail?

End

Yes

Replace the Ethernet
controller that has the error
slot number listed in the
error message.

A
WS3PM053

Figure 11-20. Troubleshooting Ethernet controller, 2 of 2

11–32 Troubleshooting Procedures

Troubleshooting a Printer, Modem, or Other Serial Line
Device
For information about serial line tests and error messages, see
"Serial Line Tests" in Appendix D.
Start

Does an error message list
No

3/scc as the test that failed or does
the customer complain about a
specific serial line device?

End

Yes
Make sure the hardware and software
for the serial line device are set up
properly.

Run the internal loopback serial line test
script. Type

sh 3/test-scc-t

and press

Return.

(Continued)
WS3PM054

Figure 11-21. Troubleshooting a printer, modem, or other serial line
device, 1 of 2

Troubleshooting Procedures 11–33

(Continued)

Does the serial line test
script report an error?

Yes

Replace the base system
module.

No
Run the external loopback
transmit and receive test for
the communications
connector attached to the
device that reported the
problem.

Yes
Does the transmit and
receive test report an error?

Troubleshoot according to
the error message.

No
Run the external loopback
pins test for the
communications connector
attached to the device that
reported the problem.

Yes
Does the transmit and
receive test report an error?

Troubleshoot according to
the error message.

No
End

WS3PM055

Figure 11-22. Troubleshooting a printer, modem, or other serial line
device, 2 of 2

11–34 Troubleshooting Procedures

Troubleshooting the Power Supply
Start

Turn on the system unit.

Is the green power supply
LED on?

Yes

Turn off the system power,
remove the system unit
cover, and make sure that
the power cord from the
power supply to the system
module is connected.

Make sure the power cord
is connected and that there
is power at the electric
outlet.

Is the green power supply
LED on?

Yes

Replace the power supply.

End

Does the system
have power now?

Replace the power supply.

End
WS3PM056

Figure 11-23. Troubleshooting the power supply

Troubleshooting Procedures 11–35

When the System Unit Overheats
The error message ?TFL 3/misc/pstemp indicates that the
system unit is overheating.

Turn off the system unit
power. Remove the system
unit cover. Turn on the
system unit power.

Do any fans rotate?

If the fan assembly power
cord is connected correctly,
replace the power supply.

Yes

Does the power
supply still overheat?
Yes

End

Yes

Do all three fans rotate?

Replace the power supply.

Replace the power supply
fan assembly.

End
WS3PM057

Figure 11-24. When the system unit overheats

11–36 Troubleshooting Procedures

Troubleshooting the Keyboard and Mouse
Start

Does 3/misc/kbd or
3/misc/mouse appear in
an error message?
Yes
Make sure the keyboard and
mouse are connected to the
keyboard-mouse cable and
that the keyboard-mouse
cable is connected to the
back of the system unit.

Turn the system unit power
off and on to run the
power-up self-test.

Does 3/misc/kbd or

3/misc/mouse appear in
an error message?
Yes

End

(Continued)
WS3PM058

Figure 11-25. Troubleshooting the keyboard and mouse, 1 of 2

Troubleshooting Procedures 11–37

(continued)

Replace the keyboard or
mouse that reported the
error. Turn the system off
and on to run the power-up
self-test.

Does 3/misc/kbd or

3/misc/mouse appear in
an error message?
Yes

End

Replace the keyboardmouse cable. Turn the
system unit power off and on
again to run the power-up
self-test.

Does 3/misc/kbd or

3/misc/mouse appear in
an error message?

yes

End

Replace the system module.

WS3PM059

Figure 11-26. Troubleshooting the keyboard and mouse, 2 of 2

11–38 Troubleshooting Procedures

When ULTRIX Is Running but the Monitor Has No Display
Start

Is there a display
on the monitor?

Yes

End

Do the diagnostic LEDs
display 1111 1111?

Make sure the brightness
on the monitor is turned up.

Yes
Yes

Is there a display
on the monitor now?
No

End

See "When the Monitor Has
No Display" in this chapter.

(continued)

End

WS3PM060

Figure 11-27. Troubleshooting when ULTRIX is running, but the monitor
has no display, 1 of 3

Troubleshooting Procedures 11–39

(continued)
Was ULTRIX running
when the display failed?

See "LED Displays"
in Chapter 9.

Yes

The graphics hardware is
faulty. Make sure the video
cable is connected properly.
If the problem persists, log in
over the network and
shut down the system
software. Type /etc/
shutdown -h +5 and press
Return.
Do the LEDs read
0000 0000, indicating that
the system entered console
mode after you entered the
shutdown command?

Press the Halt button.

Yes

Turn the system power off
and on. If the system
attempts to reboot and the
boot disk is external, press
the Halt button and
disconnect the boot disk
from the SCSI bus to
which the disk is connected.
Is there a terminal
available to use as an
alternate terminal?

Turn on the system unit
power. Check the
diagnostic LED display.

Yes

(Continued)

(Continued)
WS3PM061

Figure 11-28. Troubleshooting when ULTRIX is running, but the monitor
has no display, 2 of 3

11–40 Troubleshooting Procedures

A
(Continued)

Connect the alternate
terminal to the system unit.

Type

setenv console s.

Press Return.
B

Troubleshoot according to

(Continued)

the error messages that
appear on the terminal.
Replace any FRU that
reports an error.

Yes

Does the power-up
self-test stop with the
right LEDs equal to
0011 or 0010?

Reconnect any SCSI
devices that you

disconnected. Reset the
environment variables.

If the entire LED display is
0000 0000, replace parts of
the graphics hardware one
by one until the problem is

End

corrected.

Replace the TURBOchannel

Reconnect any SCSI

module in the slot number

devices that you

that appears on the left

disconnected. Reset the

LEDs.

environment variables.

End

WS3PM062

Figure 11-29. Troubleshooting when ULTRIX is running, but the monitor
has no display, 3 of 3

Troubleshooting Procedures 11–41

Troubleshooting with ULTRIX Error Logs
ULTRIX error logs are useful for troubleshooting intermittent
problems. Use the event type and physical address entries that
appear in ULTRIX error logs to determine which part of the
system hardware logged the error.
Replace the FRU that contains the hardware indicated by the
error log. For FRU replacement procedures, refer to the section
in Chapter 5 of this guide or the TURBOchannel Maintenance
Guide that discusses the FRU you want to replace.
For a discussion of error log formats, see "ULTRIX Error Logs"
in Section 9.

11–42 Troubleshooting Procedures

Part III
Appendices

A
Equipment Specifications
This appendix lists the physical specifications, operating
conditions, and nonoperating conditions for the following items:
DECstation 5000 Model 240 system unit
DECstation 5000 Model 260 system unit
LK401-AA keyboard
VSXXX-GA mouse
VSXXX-AB tablet
BA42 expansion box
RZ23L and RZ24L hard disk drive
RZ25 and RZ26 hard disk drive
RZ58 hard disk drive
TK50Z and TZ30 tape drive
TZ85 tape drive
TZK10 QIC tape drive
TLZ04 and TLZ06 cassette tape drive
RRD42 optical compact disc drive
RX23 and RX33 diskette drive

Equipment Specifications A–1

DECstation 5000 Model 240 System Unit Equipment
Specifications
Table A-1. System Unit Description
Weight
Height
Width
Depth
Input voltage
Input current
Power
– Frequency
– Heat dissipation

12.70 to 22.70 kg (28.00 to 50.00 lb)
9.14 cm (3.60 in)
51.03 cm (20.09 in)
43.48 cm (17.12 in)
Auto adjust 100–120 Vac or 220–240 Vac
5 A at 100–120 Vac
2.4 A at 220–240 Vac
50 to 60 Hz
359 watts, maximum

Table A-2. System Unit Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 35°C (50°F to 95°F)
11°C (52°F) per hour, maximum
10% to 90%, noncondensing
28°C (82°F)
2°C (36°F)
2,400 m (8,000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-3. System Unit Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

A–2 Equipment Specifications

40°C to 66°C ( 40°F to 151°F)
10% to 95%, noncondensing
46°C (115°F), packaged
4,900 m (16,000 ft) maximum

DECstation 5000 Model 260 System Unit Equipment
Specifications
Table A-4. System Unit Description
Weight
Height
Width
Depth
Input voltage
Input current
Power
– Frequency
– Heat dissipation

Table A-5. System Unit Operating Conditions
Temperature range1
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 35°C (50°F to 95°F)
10% to 90%, noncondensing
28°C (82°F)
2°C (36°F)
2,400 m (8,000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-6. System Unit Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
10% to 95%, noncondensing
46°C (115°F), packaged
4,900 m (16,000 ft) maximum

Equipment Specifications A–3

LK401-AA Keyboard Equipment Specifications
Table A-7. LK401-AA Keyboard Description
Weight
Height
Width
Depth
Number of keys
Number of indicators
Language variations
Cable
Baud rate
Electrical interface
Power consumption
Power input
Volume control
Keystroke timing

A–4 Equipment Specifications

1.16 kg (2.56 lb)
4.76 cm (1.88 in)
47.80 cm (19.00 in)
19.20 cm (7.56 in)
108
2 status LEDs
15
Software selectable (keycaps required)
1.8 m (6 ft) uncoiled length
4-pin mmj connector at one end
4800
EIA RS 423
2.0 watts maximum
12 V 6% at 350 ma
8 levels, plus off
20 ms minimum

Table A-8. LK401-AA Keyboard Operating Conditions
Temperature range 1
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 40°C (50°F to 104°F)
10% to 90% noncondensing
32°C (90°F)
15°C (60°F)
2,400 m (8,000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-9. LK401-AA Keyboard Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
10% to 95%, noncondensing
52°C (126°F), packaged
4,900 m (16,000 ft) maximum

Equipment Specifications A–5

VSXXX-GA Mouse Equipment Specifications
Table A-10. VSXXX-GA Mouse Description
Weight
Height
Diameter
Buttons
Cable length
Accuracy

Baud rate
Data format
Electrical interfaces
Operating modes
Power requirements
Resolution
Tracking speed
Tracking rate

A–6 Equipment Specifications

97 g (3.4 oz) without cable
32.5 mm (1.28 in)
60.9 mm (2.4 in)
3
1.5 m (5 ft) shielded, 5 conductors and terminals
in a 7-pin micro-DIN-type connector (male)
3% 0 to 25 cm (0 to 10 in) per second in any
direction
15% 25 to 50 cm (10 to 20 in) per second in
any direction
30% 50 to 75 cm (20 to 30 in) per second in
any direction
4800
Delta mode
RS-232 or TTL
Incremental or polling
5 V 5% at 130 ma
8 to 13 V at 20 ma (RS-232 mode)
79 counts per cm (200 counts per in)
76 cm (30 in) per second
In incremental mode: 55 reports per second
In polling mode: up to 95 reports per second

Table A-11. VSXXX-GA Mouse Operating Conditions
Temperature range 1
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 40°C (50°F to 104°F)
10% to 90% noncondensing
18°C (64°F)
2°C (36°F)
3,050 m (10,000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-12. VSXXX-GA Mouse Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
5% to 95% noncondensing
46°C (115°F) packaged
7,600 m (25,000 ft) maximum

Equipment Specifications A–7

VSXXX-AB Tablet Equipment Specifications
Table A-13. VSXXX-AB Tablet Description
Weight
Height
Width
Depth
Puck
Stylus
Cable length
Output connector (power and data)
Mating connector
Active area
Baud rate
Electrical interfaces
Incremental

Operating modes
Power requirements
Proximity (nominal)
Resolution
Remote request
Tracking rates
– In incremental mode
– In polling mode

A–8 Equipment Specifications

3.18 kg (7.00 lb)
20.32 cm (8.00 in)
40.64 cm (16.00 in)
41.15 cm (16.20 in)
4 buttons
2 buttons
1.5 m (5 ft), terminated in a 7-pin micro-DINtype connector
7-pin micro-DIN (pronged)
7-pin micro-DIN (prongless)
280 mm by 280 mm (11 in by 11 in)
4800 or 9600 baud (software selectable)
Serial, asynchronous, full-duplex
EIA RS-232-C signal levels
Position reports generated when cursor is in
motion and when pushbuttons are pressed or
released
Incremental and polling
12 V dc 10% at 0.3 A
1.27 cm (5 in) cursor
79 counts per cm (200 counts per in)
0.63 cm (0.25 in) stylus
X-Y coordinate update and proximity report
when polled by host
55, 72, or 120 reports per second
50 reports per second at 4800 baud
80 reports per second at 9600 baud

Table A-14. VSXXX-AB Tablet Operating Conditions
Temperature range 1
Relative humidity
Maximum wet bulb temperature
Minimum dew point temperature
Altitude

10°C to 40°C (50°F to 104°F)
20% to 80% noncondensing
28°C (82°F)
2°C (36°F)
2400 m (8000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-15. VSXXX-AB Tablet Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
10% to 95% noncondensing
46°C (115°F) packaged
4900 m (16,000 ft) maximum

Equipment Specifications A–9

BA42 Storage Expansion Box Equipment Specifications
Table A-16. BA42 Storage Expansion Box Description
Weight
Height
Width
Depth
Input voltage
Frequency range
Power

17.24 kg (38.00 lb) maximum
10.16 cm (4.00 in)
46.02 cm (18.12 in)
40.64 cm (16.00 in)
Automatically adjusting ac input
120–240 Vac
47 to 63 Hz
90 watts maximum

Table A-17. BA42 Storage Expansion Box Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 40°C (50°F to 104°F)
11°C (20°F) per hour maximum
20% to 80% noncondensing
28°C (82°F)
2°C (36°F)
2400 m (8000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in

altitude.

Table A-18. BA42 Storage Expansion Box Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

A–10 Equipment Specifications

5°C to 50°C (41°F to 122°F)
10% to 95% noncondensing
46°C (115°F) packaged
4900 m (16,000 ft) maximum

RZ23L SCSI Hard Disk Drive Equipment Specifications
Table A-19. RZ23L SCSI Hard Disk Drive Description
Internal drive
Weight
Height
Width
Depth
Capacity
– Bytes per drive
– Blocks per drive
– Block size
Data transfer rate
– Bus asynchronous mode
– Bus synchronous mode
– To and from media
Seek time

Average latency
Interface

0.54 kg (1.20 lb)
2.54 cm (1.00 in)
10.16 cm (4.00 in)
14.61 cm (5.75 in)
121.65 MB
237,588
512 bytes
3.0 MB per second
4.0 MB per second
1.5 MB per second
8 ms track-to-track
19 ms average
35 ms maximum
8.8 ms
SCSI

Equipment Specifications A–11

Table A-20. RZ23L SCSI Hard Disk Drive Operating Conditions
Temperature range1
Temperature change rate
)
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 55°C (50°F to 128°F)
11°C (20°F per hour, maximum
8% to 80% noncondensing
26°C (78°F)
2°C (36°F)
300 to 4600 m ( 1000 to 15,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-21. RZ23L SCSI Hard Disk Drive Nonoperating Conditions
Temperature range
Temperature change rate
)
Relative humidity
Maximum wet-bulb temperature
Altitude

A–12 Equipment Specifications

40°C to 66°C ( 40°F to 151°F)
20°C (36°F per hour, maximum
8% to 95% packaged, noncondensing
46°C (115°F) packaged
300 to 12,200 m ( 1,000 to 40,000 ft)

RZ24L SCSI Hard Disk Drive Equipment Specifications
Table A-22. RZ24L SCSI Hard Disk Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Capacity
– Bytes per drive
– Blocks per drive
– Block size
Data transfer rate
– Bus asynchronous mode
– Bus synchronous mode
– To and from media
Seek time

Average latency
Interface

0.77 kg (1.70 lb)
4.14 cm (1.63 in)
10.16 cm (4.00 in)
14.61 cm (5.75 in)
245.4M
479,350
512 bytes
3.0 MB per second
4.0 MB per second
1.5 MB per second
5 ms track-to-track
16 ms average
35 ms maximum
8.3 ms
SCSI

Equipment Specifications A–13

Table A-23. RZ24L SCSI Hard Disk Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

10°C to 55°C (50°F to 131°F)
11°C (20°F per hour, maximum)
8% to 80% noncondensing
26°C (78°F)
300 to 4600 m ( 1000 to 15,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-24. RZ24L SCSI Hard Disk Drive Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

A–14 Equipment Specifications

40°C to 66°C ( 40°F to 151°F)
8% to 95% packaged, noncondensing
46°C (115°F) packaged
300 m to 12,200 m ( 1,000 ft to 40,000 ft)

RZ25 SCSI Hard Disk Drive Equipment Specifications
Table A-25. RZ25 SCSI Hard Disk Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Capacity
– Bytes per drive
– Blocks per drive
– Block size
Data transfer rate
– Bus asynchronous mode
– Bus synchronous mode
– To and from media
Seek time

Average latency
Interface

0.82 kg (1.8 lb)
4.14 cm (1.63 in)
10.16 cm (4.00 in)
14.61 cm (5.75 in)
426 MB
832, 527
512 bytes
3.0 MB per second
4.0 MB per second
2.1–3.2 MB per second
2.5 ms track-to-track
14 ms average
26 ms maximum
6.8 ms
SCSI

Equipment Specifications A–15

Table A-26. RZ25 SCSI Hard Disk Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

10°C to 55°C (50°F to 131°F)
11°C (20°F) per hour, maximum
8% to 80% noncondensing
26°C (78°F)
300 to 3050 m ( 1000 to 10,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-27. RZ25 SCSI Hard Disk Drive Nonoperating Conditions
Temperature range
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

A–16 Equipment Specifications

40°C to 66°C ( 40°F to 151°F)
20°C (36°F) per hour, maximum
8% to 95% packaged, noncondensing
46°C (115°F) packaged
300 m to 12,200 m ( 1,000 ft to 40,000 ft)

RZ26 SCSI Hard Disk Drive Equipment Specifications
Table A-28. RZ26 SCSI Hard Disk Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Capacity
– Bytes per drive
– Bytes per surface
– Bytes per track
– Buffer size
Data transfer rate
– To and from media
Seek time
– Track-to-track
– Average
– Maximum (full stroke)
Average latency
Rotational speed

0.9 kg (1.9 lb)
4.13 cm (1.625 in)
10.2 cm (4.00 in)
14.6 cm (5.75 in)
1050 M
75M
29,640
512 KB
2.6 MB per second
1ms
10 ms
20 ms
5.6 ms
5363 rpm

Table A-29. RZ26 SCSI Hard Disk Drive Operating Conditions
Ambient temperature
Relative humidity

10°C to 50°C (50°F to 122°F)
10% to 90% noncondensing

Table A-30. RZ26 SCSI Hard Disk Drive Nonoperating Conditions
Ambient temperature
Relative humidity

40°C to 66°C ( 40°F to 151°F)
8% to 95% packaged, noncondensing

Equipment Specifications A–17

RZ58 SCSI Hard Disk Drive Equipment Specifications
Table A-31. RZ58 SCSI Hard Disk Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Capacity
– Bytes per drive
– Blocks per drive
– Block size
Data transfer rate
– Bus asynchronous mode
– Bus synchronous mode
– To and from media
Seek time

Average latency
Interface

A–18 Equipment Specifications

3.81 kg (8.40 lb)
8.26 cm (3.25 in)
14.61 cm (5.75 in)
20.32 cm (8.00 in)
1.38 gigabytes
2,698,061 not including spares
512 bytes
1.6 MB per second
5.0 MB per second
2.5 MB per second
2.5 ms track-to-track
12.5 ms average
25 ms maximum
5.6 ms
SCSI II

Table A-32. RZ58 SCSI Hard Disk Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 55°C (50°F to 131°F)
11°C (20°F) per hour, maximum
8% to 80%
26°C (78°F)
2°C (36°F)
300 to 4600 m ( 1000 to 15,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-33. RZ58 SCSI Hard Disk Drive Nonoperating Conditions
Temperature range
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
20°C (36°F) per hour, maximum
8% to 95%, packaged
46°C (115°F), packaged
300 to 12,200 m ( 1000 to 40,000 ft)

Equipment Specifications A–19

TK50Z Tape Drive Equipment Specifications
Table A-34. TK50Z Tape Drive Description
Expansion box
– Weight
– Height
– Width
– Depth
Bit density
Cartridge capacity
Frequency
Heat dissipation
Input current
Media
Mode of operation
Number of tracks
Power
Track format
Data transfer rate
Tape speed

A–20 Equipment Specifications

12.70 kg (28.00 lb)
13.97 cm (5.50 in)
32.39 cm (12.75 in)
28.58 cm (11.25 in)
6,667 bits per in
95 MB approximate
50 to 60 Hz
32 watts maximum
2.4 A: 100 to 120 Vac
1.3 A: 220 to 240 Vac
12.77 mm (0.5 in), 183 m (600 ft) long magnetic
tape
Streaming
22
160 watts
Serpentine
360 Kbits per second (45 KB per second)
75 in per second

Table A-35. TK50Z Tape Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 40°C (50°F to 104°F)
11°C (20°F) per hour, maximum
10% to 80% noncondensing
28°C (82°F)
2°C (36°F)
2,400 m (8,000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-36. TK50Z Tape Drive Nonoperating Conditions
Temperature range
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

30°C to 66°C ( 22°F to 151°F)
20°C (36°F) per hour, maximum
10% to 95% noncondensing
46°C (115°F) packaged
9,140 m (30,000 ft) maximum

Equipment Specifications A–21

TZ30 Tape Drive Equipment Specifications
Table A-37. TZ30 Tape Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Bit density
Cartridge capacity
Media
Mode of operation
Number of tracks
Tape speed
Track format
Data transfer rate

A–22 Equipment Specifications

1.50 kg (3.31 lb)
4.14 cm (1.63 in)
14.48 cm (5.70 in)
21.59 cm (8.50 in)
2624 bits per cm (6667 bits per in)
95 Mbytes, formatted (approximate)
12.77 mm (0.5 in) unformatted magnetic tape
Streaming
22
190 cm per second (75 in per second)
Multiple track serpentine recording
62.5 Kbytes per second

Table A-38. TZ30 Tape Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 40°C (50°F to 104°F)
11°C (20°F) per hour, maximum
20% to 80% noncondensing
25°C (77°F)
2°C (36°F)
2400 m (8000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-39. TZ30 Tape Drive Nonoperating Conditions
Temperature range
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
20°C (36°F) per hour, maximum
10% to 95%
2°C (36°F)
9100 m (30,000 ft) maximum

Equipment Specifications A–23

TZ85 Tape Drive Equipment Specifications
Table A-40. TZ85 Tape Drive Description (Table Top)
– Weight
– Weight
– Height
– Width
Bit density
Cartridge capacity
Mode of operation
Number of tracks
Tape speed
Track format
Data transfer rate

10 lb 1.5 ozs (box only)
16 lb 15 ozs (box w/drive)
5.72 in
9.25 in
42,500 bits per in
2.6 Gbytes, formatted (approximate)
Streaming
48
100 in per second
Two track parallel, serpentine recording
800 Kilobytes per second (at tape)

Table A-41. TZ85 Tape Drive Operating Conditions (including media)
Temperature range
Relative humidity
Altitude
Noise level
Air Quality

10°C to 40°C (50°F to 104°F)
20% to 80% noncondensing
2400 m (8000 ft) maximum
35 dBA
Normal office environment

Table A-42. TZ85 Tape Drive Nonoperating Conditions (excluding media)
Temperature range
Relative humidity
Altitude

A–24 Equipment Specifications

40°C to 66°C ( 40°F to 151°F)
10% to 95%
9100 m (30,000 ft) maximum

TZK10 QIC Tape Drive Equipment Specifications
Table A-43. TZK10 QIC Tape Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Cartridge capacity
Data density
Drive interface
Media
Mode of operation
Number of tracks
Power consumption, normal
Power consumption, peak
Transfer rate
Tape speed
Track format

1.09 kg (2.40 lb)
4.39 cm (1.73 in)
14.61 cm (5.75 in)
20.83 cm (8.20 in)
320 MB (approximate) with DC6320
525 MB (approximate) with DC6525
16,000 bits per in
SCSI-2
DC6320, DC6525, or Digital-approved
equivalent
Streaming
26
20 watts
33 watts
200 KB per second at average streaming mode
1.5 MB per second at SCSI maximum
305 cm (120 in) per second
Multiple track serpentine recording

Equipment Specifications A–25

Table A-44. TZK10 QIC Tape Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

5°C to 40°C (50°F to 104°F)
11°C (20°F) per hour, maximum
2% to 80% noncondensing
28°C (82°F)
2°C (36°F)
3900 m (13,000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-45. TZK10 QIC Tape Drive Nonoperating Conditions
Temperature range
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

A–26 Equipment Specifications

30°C to 60°( 22°F to 151°F)
20°C (36°F) per hour, maximum
10% to 95%
46°C (115°F)
12,200 m (40,000 ft) maximum

TLZ04 Cassette Tape Drive Equipment Specifications
Table A-46. TLZ04 Cassette Tape Drive Description
Expansion box
– Weight
– Height
– Width
– Depth
Cassette capacity
Drive interface
Media
Mode of operation
Power consumption
Power requirements
Track format
Transfer rate

7.7 kg (17.00 lb)
11.50 cm (4.50 in)
35.00 cm (14.00 in)
30.00 cm (12.00 in)
1.2 gigabyte
SCSI
TLZ04-CA cassette tape
Streaming and start/stop
230 watts
1.6 A: 100 to 120 Vac
1.0 A: 200 to 240 Vac
Digital data storage (DDS)
156 KB per second

Table A-47. TLZ04 Cassettte Tape Drive Operating Conditions
Temperature range1
Relative humidity
Altitude

10°C to 40°C (50°F to 104°F)
20% to 80% noncondensing
0 m to 4600 m (0 to 15,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in

altitude.

Table A-48. TLZ04 Cassette Tape Drive Nonoperating Conditions
Temperature range
Relative humidity
Altitude

40°C to 70°C (40°F to 158°F)
5% to 95% noncondensing
0 m to 15,200 m (0 to 50,000 ft)

Equipment Specifications A–27

TLZ06 Cassette Tape Drive Equipment Specifications
Table A-49. TLZ06 Cassette Tape Drive Description
Dimensions
– Weight
– Height
– Width
– Depth
Capacity
– Per drive
– Per drive
– Per surface
– Blocks per drive

2.2 kg (4.7 lb)
4.1 cm (1.6 in)
14.6 cm (5.75 in)
30.00 cm (12.00 in)
1.2
320 MB, approximate DC6320 cartridge
525 MB, approximate DC6525 cartridge
2.48 MB
649,040

Table A-50. TLZ06 Cassettes
Cassette

Size

Capacity

TLZ06-CA

4mm x 90m

2 or 4 GB

Table A-51. TLZ06 Cassettte Tape Drive Operating Conditions
Operating temperature
Operating humidity
Altitude

10°C to 40°C (50°F to 104°F)
20% to 80% noncondensing
0 m to 4572 m (0 to 15,000 ft)

Table A-52. TLZ06 Cassette Tape Drive Nonoperating Conditions
Nonoperating temperature
Relative humidity
Altitude

A–28 Equipment Specifications

40°C to 70°C (40°F to 158°F)
5% to 95% noncondensing
0 m to 15,240 m (0 to 50,000 ft)

RRD42 Compact Disc Drive Equipment Specifications
Table A-53. RRD42 Compact Disc Drive Description
RRD42-AA
– Weight
– Height
– Width
– Depth
Capacity
Seek time
Burst transfer rate
Sustained transfer rate
Heat dissipation
Initialization startup time
Interface

1.3 kg (2.8 lb)
4.15 cm (1.63 in)
14.60 cm (5.75 in)
20.81 cm (8.2 in)
600 MB
450 ms average (typical)
700 ms maximum (typical)
1.5 MB per second
150 KB per second
14 watts (typical)
2.0 seconds maximum
SCSI

Table A-54. RRD42 Compact Disc Drive Operating Conditions
Temperature range1
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

5°C to 50°C (41°F to 122°F)
10% to 90% noncondensing
28°C (82°F)
2°C (36°F)
300 to 4600 m ( 1000 to 15,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in

altitude.

Table A-55. RRD42 Compact Disc Drive Nonoperating Conditions
Temperature range
Relative humidity
Maximum wet-bulb temperature
Altitude

30 °C to 55°C ( 22°F to 131°F)
10 to 90% packaged, noncondensing
46°C (115°F) packaged, noncondensing
300 to 12,200 m ( 1000 to 40,000 ft)

Equipment Specifications A–29

RX23 Diskette Drive Equipment Specifications
Table A-56. RX23 Diskette Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Number of tracks
Number of heads
Step rate
Diskette size
Recording surfaces per diskette
Sectors per track
Capacity
– Bytes per drive
– Blocks per drive
– Block size
Data transfer rate
– To and from media
Operating power
Standby power

A–30 Equipment Specifications

0.48 kg (1.06 lb)
3.00 cm (1.18 in)
10.16 cm (4.00 in)
15.01 cm (5.91 in)
80
2
3 ms per track
8.9 cm (3.5 in)
2
9 double density
18 high density
737 KB double density
1,474 KB high density
1,440 double density
2,880 high density
512 bytes
250 Kbits per second double density
500 Kbits per second high density
3.0 watts
0.3 watts

Table A-57. RX23 Diskette Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

5°C to 50°C (40°F to 122°F)
11°C (20°F) per hour, maximum
8% to 80%, noncondensing
29°C (80°F)
2°C (36°F)
300 to 3060 m ( 1,000 ft to 10,000 ft)

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-58. RX23 Diskette Drive Nonoperating Conditions
Temperature
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

40°C to 66°C ( 40°F to 151°F)
20°C (36°F) per hour, maximum
5% to 95%, packaged
46°C (115°F), packaged
300 to 12,300 m ( 1,000 ft to 40,000 ft)

Equipment Specifications A–31

RX33 Diskette Drive Equipment Specifications
Table A-59. RX33 Diskette Drive Description
Internal drive
– Weight
– Height
– Width
– Depth
Number of tracks
Number of heads
Track density
Step rate
Diskette size
Recording surfaces per diskette
Sectors per track
Capacity
– Bytes per drive
– Blocks per drive
– Block size
Data transfer rate
– To and from media
Operating power
Standby power

A–32 Equipment Specifications

1.10 kg (2.43 lb)
4.32 cm (1.70 in)
14.61 cm (5.75 in)
20.32 cm (8.00 in)
80
2
96 tracks per inch
3 ms per track
13.13 cm (5.25 in)
2
10 normal density
15 high density
409 KB normal density
1200 KB high density
800 normal density
2400 high density
512 bytes
250 Kbits per second normal density
500 Kbits per second high density
4.1 watts
1.5 watts

Table A-60. RX33 Diskette Drive Operating Conditions
Temperature range1
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Minimum dew-point temperature
Altitude

10°C to 46°C (50°F to 115°F)
11°C (20°F) per hour, maximum
20% to 80% noncondensing
45°C (113°F)
2°C (36°F)
2400 m (8000 ft) maximum

1 Reduce maximum temperature by 1.8°C for each 1,000 meter (1.0°F for each 1,000 ft) increase in
altitude.

Table A-61. RX33 Diskette Drive Nonoperating Conditions
Temperature
Temperature change rate
Relative humidity
Maximum wet-bulb temperature
Altitude

34°C to 60°C ( 30°F) to 140°F)
20°C (36°F) per hour, maximum
5% to 90%
45°C (113°F) packaged
9100 m (30,000 ft) maximum

Equipment Specifications A–33

B
Part Numbers
This appendix lists part numbers for the following items related
to the DECstation 5000 Models 240 and 260:
Major field replaceable units (FRUs)
TURBOchannel option (TCO) modules
Monitors
Input devices
Cords and cables
Connectors, adapters, and terminators
Miscellaneous hardware
Software documentation
Hardware documentation

Part Numbers B–1

System
unit cover
Memory
module

Power supply

Front cover plate

System module
and chassis
CPU module
WS3PM024

Figure B-1. DECstation 5000 Model 240 major FRUs

B–2 Part Numbers

Sytem
unit cover

Memory
module

Power supply

Front cover plate

System module
and chassis
CPU module

LJ-02969-TI0

Figure B-2. DECstation 5000 Model 260 major FRUs

Part Numbers B–3

Table B-1. Part Numbers: Basic System Components
Item

FRU No.

Customer Order
No.

CPU module only, (40 MHz)
CPU module only, (60 MHz)
Base system module with CPU
module included
Base system module with chassis
Power supply assembly (H7878A)
Memory module (SIMM), 8 Mbyte
Memory module (SIMM), 32 Mbyte
NVRAM module, 1Mbyte
System unit cover
System unit chassis

54-20627-01
54-21872-02
—

KN03-GA
KN05-AA
KN03B-HA

70-28348-01
30-32506-01
54-19813-AA
54-19813-CA
54-20948-01
70-27056-01
70-27053-01

—
—
MS02L-AB
MS02-CA
MS02-NV
—
—

Table B-2. Part Numbers: SCSI Hardware
Item

FRU No.

Customer Order
No.

SCSI controller option module
SCSI system-unit-to-expansion-box
cable
SCSI controller terminator
SCSI chain terminator

54-19876-01
17-02641-01

PMAZ-AA/AB
BC09D-06

12-33626-01
12-30552-01

—
—

B–4 Part Numbers

Table B-3. Part Numbers: TURBOchannel Option Modules
Item

FRU No.

Customer Order
No.

Monochrome frame buffer (MX), 1
plane, 1280x1024, 72 Hz
Color frame buffer (CX), 8 plane,
1024x860, 60 Hz
Color frame buffer (HX), 8 plane,
1280x1024, 72/66 Hz
Color frame buffer (HX), 8 plane,
1280x1024 @ 72 Hz, 1024x864 @ 66
Hz
Color frame buffer (HX), 8 plane,
1280x1024/1024x768, 72 Hz
True color frame buffer (TX), 24
plane, 1280x1024, 66 Hz
True color frame buffer (TX), 24
plane, 1280x1024, 72 Hz
2D graphics accelerator (PX), 8
plane, 1280x1024, 66 Hz
Lo 3D graphics accelerator (PXG), 8
plane, 1280x1024, 66 Hz
Lo 3D graphics accelerator (PXG+), 8
plane, 1280x1024, 72 Hz
Lo 3D graphics accelerator (PXG+), 8
plane, 1280x1024, 66 Hz
Mid 3D graphics accelerator (PXG),
24 plane, 1280x1024, 66 Hz
Mid 3D graphics accelerator (PXG+),
24 plane, 24 bit z buffer, 1280x1024,
72 Hz
Mid 3D graphics accelerator (PXG+),
24 plane, 24 bit z buffer, 1280x1024,
66 Hz
Hi 3D graphics accelerator (PXG+),
24 plane, 24 bit z buffer, 1280x1024,
66 Hz

54-20609-01

PMAG-AA/AB

54-19815-01

PMAG-BA/BB

54-21143-01

PMAGB-BA/BB

54-21143-02

PMAGB-CA/CB

54-21143-03

PMAGB-DA/DB

30-35790-01

PMAG-CA/CB

30-35790-02

PMAG-CA/CB

54-20314-01

PMAG-CA/CB

54-20185-01

PMAG-DA/DB

54-20185-03

PMAG-DA/DB

54-20185-04

PMAG-DC

54-20185-02

PMAG-EA/EB

54-20185-05

PMAGB-EA/EB

54-20185-06

PMAGB-EC/ED

54-20114-01

PMAG-FA/FB

(continued on next page)

Part Numbers B–5

Table B-3 (Cont.). Part Numbers: TURBOchannel Option Modules
Item

FRU No.

Customer Order
No.

Hi 3D graphics accelerator (PXG+),
24 plane, 24 bit z buffer, 1280x1024,
72 Hz
8-to-24-plane upgrade
24-bit Z-buffer option module
8-plane Z-buffer
16-plane Z-buffer
ThickWire Ethernet (NI) option
module
FDDI fiber interface module
TURBOchannel extender (TCE)
option module
TCE interface module
TCE power supply
SCSI controller option module

54-20114-02

PMAGB-FA/FB

—
—
54-20410-AA
54-20352-AA
54-19874-01

PMAG-GB
PMAG-HA/HB
—
—
PMAD-AA/AB

DEFZA-AA
54-20623-01

DEFZA-AA
—

54-20625-01
H7826
54-19876-01

—
—
PMAZ-AA/AB

B–6 Part Numbers

Table B-4. Part Numbers: Monitors
Item

FRU No.

Customer Order
No.

VR319, 19-inch monochrome monitor,
120/240 volts, Northern Hemisphere
VR319, 19-inch gray-scale monitor,
120/240 volts, Northern Hemisphere
VR319, 19-inch monochrome monitor,
240 volts, Southern Hemisphere
VR319, 19-inch gray-scale monitor,
240 volts, Southern Hemisphere
VRT16, 16-inch color monitor, 120
/240 volts, Northern Hemisphere
VRT16, 16-inch color monitor, 240
volts, Southern Hemisphere
VRT19, 19-inch color monitor, 120
volts
VRT19, 19-inch color monitor, 240
volts, Northern Hemisphere
VRT19, 19-inch color monitor, 240
volts, Southern Hemisphere

—

VR319-DA

—

VR319-CA

—

VR319-D4

—

VR319-C4

—

VRT16-DA

—

VRT16-D4

—

VRT19-DA

—

VRT19-D3

—

VRT19-D4

Part Numbers B–7

Table B-5. Part Numbers: Input Devices
Item

FRU No.

Customer Order
No.

Keyboard, flat
Keyboard, curved
Mouse
Tablet and stylus
Lighted programmable function
keyboard (LPFK) package, 120 volts
Lighted programmable function
keyboard (LPFK) package, 240 volts
Programmable function dials (PFD)
package, 120 volts
Programmable function dials
(PFD)package, 240 volts
Combination LPFK and PFD
package, 120 volts
Combination LPFK and PFD
package, 240 volts

—
—
—
—
—

LK201
LK401
VSXXX-AA
VSXXX-AB
VSX20-AA

—

VSX20-A3

—

VSX30-AA

—

VSX30-A3

—

VSX10-AA

—

VSX10-A3

B–8 Part Numbers

Table B-6. Part Numbers: Cords and Cables
Item

FRU No.

Customer Order
No.

Monitor-to-system-unit power cord
(U.S.)
Monitor-to-system-unit power cord
(Europe)
System unit or expansion box
primary power cord
Keyboard-mouse cable
Serial line cable
Printer/console cable
Modem cable
SCSI system-unit-to-expansion-box
cable
SCSI expansion-box-to-expansion-box
cable
ThickWire transceiver cable
ThinWire cable, 12 ft
Video cable, color
Video cable, gray-scale
Video cable, monochrome
TURBOchannel extender (TCE)
interface cable
TCE internal SCSI cable
TCE SCSI power harness

17-00442-25

BN19P-1K

17-00365-19

BN19A-2C

17-00606-10

BN19P-K

17-02640-01
—
17-0081117-0032217-02641-01

—
BC16E-10
BC16EBC22E-10
BC09D-06

17-01351-04

BC19J-1E

17-01321-01
17-01241-12
17-02906-02
17-02878-01
17-03054-01
17-03335-01

BNE4C-02
BC16M-12
BC29G-03
—
—
—

17-03055-01
17-03064-01

—
—

Part Numbers B–9

Table B-7. Part Numbers: Connectors, Adapters, and Terminators
Item

FRU No.

Customer Order
No.

Modified modular jack (MMJ)
loopback connector
ThickWire loopback connector
SCSI controller terminator
SCSI chain terminator
ThinWire T-connector
ThinWire terminators
Jumper to clear NVR
Comm-line-to-MMJ adapter
Comm modem loopback
ThinWire LAN assembly kit
DESTA ThickWire-to-ThinWire
Ethernet adapter
Twisted pair (10baseT) adapter

12-25083-01

—

12-22196-02
12-33626-01
12-30552-01
12-25869-01
12-26318-01
12-14314-00
12-33190-01
29-24795-00
22-00112-01
70-22781-02

—
—
—
—
—
—
—
—
BC16T-12
DESTA-BA

—

H3350-AA

Table B-8. Part Numbers: Small Hardware
Item

FRU No.

Customer Order
No.

TURBOchannel cover
CPU standoff post
CPU standoff rivet
Front cover plate
Disposable grounding wrist strap
Tamper-proof tape
EMI grounding clips
PC Removal Tool
Product conversion label

74-41143-05
12-35477-01
12-35477-02
70-27053-01
12-36175-01
36-33513-01
74-46746-01
74-46254-01
36-15946-11

—
—
—
——
—
—
—
—

B–10 Part Numbers

Table B-9. Part Numbers: Software Documentation
Item

FRU No.

Customer Order
No.

ULTRIX Workstation Media (TK50) and
Documentation Kit
ULTRIX Workstation Media (CD-ROM) and
Documentation Kit
ULTRIX Workstation (OLD) On-line
Documentation and Media Kit (both on
CD-ROM)
DECnet ULTRIX/RISC Media (TK50) and
Documentation Kit
DEC C for ULTRIX/RISC (TK50)
ULTRIX Guide to the Error Logger
Technical Summary for RISC Processors

—

QA-VV1AA-H5

—

QA-VV1AA-H8

—

QA-VV1AL-H8

—

QA-YT9AA-H5

—
—
—

QA-YSJAA-H5
AE-ME95B-TE
AA-MM35ATE
AA-MM05ATE

Documentation Overview for RISC
Processors

—

Part Numbers B–11

Table B-10. Part Numbers: Hardware Documentation
Item

FRU No.

Customer Order No.

DECstation 5000 Model 200 Series
—
User Documentation Kit
Kit includes the following documents:

EK-PM38A-DK

DECstation 5000 Model 200 Series
Installation Guide
DECstation 5000 Model 200 Series
Operator’s Guide
DECstation 5000 Model 200 Series
Workstation Reference Card
DECstation 5000 Model 200 Series
Maintenance Guide
DECstation 5000 Model 200 Series
Pocket Reference Guide
TURBOchannel Maintenance Guide

—

EK-PM38B-IN-001

—

EK-PM38C-OG-001

—

EK-PM38D-RC-001

—

EK-PM38G-MD-001

—

EK-PM38E-PG-001

—

EK-TRBOC-MG-004

B–12 Part Numbers

C
Console Commands
This appendix explains:
The rules to follow when you type console commands
Terms commonly used in this discussion of console
commands
The command format and purpose of each console command
Possible console command error messages

Console Commands C–1

Using This Appendix
Conventions Used in This Appendix
Letters in boldface type like this are to be typed exactly
as they appear.
Letters in italic type like this are variables that you replace
with actual values.
Arguments enclosed in square brackets ([ ]) are optional.
Ellipses (...) follow an argument that can be repeated.
A vertical bar ( | ) separates choices. You can think of the
bar as a symbol meaning.
Parentheses enclose a group of values from which you must
select one value. For example, -(b | h | w) means enter -b
or -h or -w.
Some Terms Used in This Appendix
Controller - A hardware device that directs the operation and
communication between devices or other controllers. Each
controller in the system has a unique controller ID number.
Script - A collection of console commands that run in a set
order. Test scripts, which are collections of individual tests
and may also contain other test scripts, are commonly used for
troubleshooting the system.
Slot - The physical location of a module or modules.
TURBOchannel option modules occupy slots 0, 1, and 2.
The base system occupies slot 3. Base system hardware
includes the system module, CPU module, and memory
modules. The system module contains the base system
SCSI and Ethernet controllers.

C–2 Console Commands

Rules for entering console commands
You can use console commands when the system monitor
displays the >> or R> prompt. When the system displays the R>
prompt, you can use only the boot and passwd commands until
you enter the console command password.
Follow these rules when you type console commands:
Type uppercase and lowercase letters exactly as they
appear in command lines. The system treats uppercase and
lowercase letters as different input.
Press Return after you type a command.
Enter numbers as follows:
Enter decimal values as a string of decimal digits with
no leading zeros (for example, 123).
Enter octal values as a string of octal digits with a
leading zero (for example, 0177).
Enter hexadecimal values as a string of hexadecimal
digits preceded by 0x (for example, 0x3ff).
When reading or writing to memory, enter data as bytes,
halfwords, or words. Because a word is 4 bytes, successive
addresses referenced by a word are successive multiples
of 4. For example, the address following 0x80000004 is
0x80000008. An error occurs if you specify an address that
is not on a boundary for the data size you are using.
The following key combinations have an immediate effect
when the system is in console mode:
Ctrl-s freezes the screen display.
Ctrl-q releases a frozen screen display.
Ctrl-c aborts a command.
Ctrl-u erases a partially typed command line.

Console Commands C–3

Console Command Reference
This section describes console commands used to test the
following hardware:
System module
CPU module
Memory modules
Ethernet controllers
SCSI controllers
Color frame-buffer graphics modules
2D graphics accelerator modules
3D graphics modules
Console commands in this appendix appear in the same order
as they appear in the system console command Help menu.
For information about console commands used by TURBOchannel
options not on this list, refer to the TURBOchannel
Maintenance Guide.

C–4 Console Commands

Console Command Format Summary
Here are the console commands and their formats displayed in
the Help menu that appears when you enter ?:
?[cmd]
boot [[-z #] [-n] #/path [ARG...]]
cat SCRPT
cnfg [#]
d [-bhw] [-S #] RNG val
e [-bhwcdoux] [-S #] RNG
erl [-c]
go [ADR]
init [#] [-m] [ARG...]
ls [#]
passwd [-c] [-s]
printenv [EVN]
restart
script SCRPT
setenv EVN STR
sh [-belvS] [SCRPT] [ARG..]
t [-l] #/STR [ARG..]
unsetenv EVN

The following sections describes the console commands in
detail. Note that the command descriptions do not always use
the format that appears in the Help menu. Table C-1 lists the
console commands.
Table C-1. Console Commands
Command

Function

?[cmd]

Displays console commands
and formats.
Boots the system.
Displays the contents of a
script.
Displays system configuration information.
Deposits data into memory.

boot[-z] [-n] [bootpath] [-a] [args...]
cat slot_number /script_name
cnfg [slot_number]
d [- (b | h | w) ] [-scount]rng

(continued on next page)

Console Commands C–5

Table C-1 (Cont.). Console Commands
Command

Function

e [- (b | h | w) ] [-c] [-d] [-o] [-u] [-x]
[-scount]rng
erl [-c]

Examines memory contents.

go [address]
init[slot_number][-m]
ls [slot_number]
passwd [-c][-s]
printenv[variable]
restart

script name
setenvvariable value
sh [-b] [-e] [-l] [-v] [-S] [slot_number/script]
[arg...]
t [-l] slot_number /test_name [arg1]... [argn]
test

unsetenv variable

C–6 Console Commands

Displays the error message
log.
Transfers control to a specific
address.
Resets the system or module.
Displays the scripts and
other files in a module.
Sets and clears the console
password.
Prints environment
variables.
Attempts to restart the
operating system software
specified in the restart block.
Creates a temporary script of
console commands.
Sets an environment
variable.
Runs a script.
Runs a test.
Runs a comprehensive test
script that checks the system
hardware.
Removes an environment
variable.

? Command
Use the ? command to display a list of available console
commands and their formats. The ? command format is:
? [cmd]
To display the format for all available console commands,
omit the optional cmd parameter.
To display the format for a single command, replace the
optional cmd parameter with the name of the command for
which you want a command format display.
boot Command
Use the boot command to boot the system software. The boot
command format is:
boot [-zseconds] [-n] [bootpath] [-a] [args...]
Include the optional -zseconds parameter to have the
system wait before starting the bootstrap operation.
Replace seconds with the number of seconds the system
should wait before the bootstrap operation starts.
Include the optional -n parameter to have the boot
command load, but not execute, the specified file.
Replace the optional bootpath parameter with the
specification for the file you are using to boot. The file
specification form depends on the type of boot device you
use.
To boot from Ethernet, use the file specification form:
slot_number/protocol[/file]
Replace slot_number with the slot number of the
Ethernet controller you are using to boot. The protocol
parameter represents the name of the network protocol
that performs the boot operation.
Replace protocol with either mop or tftp. The optional
file parameter represents a specific file that you use to
boot.

Console Commands C–7

For example, to use the protocol named mop to boot
from the base system Ethernet, which uses slot number
3, type boot 3/mop and press Return.
To boot from a drive, use the file specification form:
slot_number/(rz | tz)scsi_id/file_name
Replace slot_number with the SCSI controller slot
number. Use the (rz | tz) parameter to specify the
type of drive that performs the boot operation. Specify
rz to boot from a hard disk or compact disc drive.
Specify tz to boot from a tape drive.
Replace scsi_id with the SCSI ID for the drive you are
using to boot.
Replace file_name with the name of the specific file you
want to boot.
Example: to boot the file named vmunix in multi-user
mode from a hard disk drive with SCSI ID 1 that is
on the SCSI bus connected to the base system SCSI
controller in slot 3, type:
boot 3/rz1/vmunix -a
Example: to boot the file called vmunix from a tape
drive that has SCSI ID 2 and is on the SCSI bus
connected to a SCSI controller in option slot 1, type:
boot 1/tz2/vmunix
The tape labeled "Ultrix 4.L supported vol. 1 (RISC)" is
the bootable tape.
To perform a multi-user boot operation, include the -a
argument. If you omit the -a argument, the system
performs a single-user boot.
Important information about the boot command

If you include no bootpath in the boot command, the system
uses the boot environment variable as the string for the
boot command.

C–8 Console Commands

If you include any additional arguments, you must type
the entire string in the boot command. The system ignores
the boot environment variable whenever you specify any
arguments in the boot command.
If you use any spaces or tabs in the boot environment
variable, you must surround the entire value with double
quotation marks. For example, to set the boot environment
variable to use the mop protocol to perform a multi-user
boot from the base system Ethernet controller in slot 3,
type:
setenv boot "3/mop -a"
For details about the boot command parameters for each
TURBOchannel option module, refer to the respective
TURBOchannel option module documentation.
cat Command
Use the cat command to display the contents of a script. The
cat command format is:
cat slot_number/script_name
Replace slot_number with the slot number of the module
that has the contents you want to display.
Replace script_name with the name of the script for which
you want to display the contents.
Example: to display the individual self-tests contained in the
test-rtc test script in the base system, type:
cat 3/test-rtc
The following list of the individual tests that are in the testmem-m test script then appears on the monitor:
>>cat 3/test-rtc
t ${#}/rtc/regs
t ${#}/rtc/nvr
t ${#}/rtc/period
t ${#}/rtc/time

Console Commands C–9

cnfg Command
Use the cnfg command to display hardware configuration
information. The cnfg command format is:
cnfg [slot_number]
To display general system configuration information, type
the cnfg command without the slot_number parameter.
To display detailed configuration information for an
individual module, replace the optional slot_number
parameter with the slot number of the module for which
you want a configuration display.
General system configuration displays

The following sample general system configuration display is for
a system with optional NVRAM, Ethernet, and SCSI modules
installed:
>>cnfg
3: KN03-AA DEC X2.0d TCF0 ( 24MB,

1MB NVRAM)
(enet: 08-00-2b-24-5b-82)
(scsi = 7)

2: PMAD-AA DEC V5.1f TCF0 (enet: 08-00-2b-0f-43-31)
1: PMAZ-AA DEC V5.1e TCF0 (scsi = 7)
0: PMAG-BA DEC T5.2a TCF0 (CX -- D=8)

Note:

If an R4000 CPU module is installed, the screen output above would
be the same except the KN03-AA designation would be KN05 for the
R4000. All other entries are unchanged.

Lines that begin with 0, 1, 2, or 3 describe the modules, if any,
that are in the option slots.
The number that begins the line is the module slot number.
The second term is the module name.
The third term is the module vendor.
The fourth term is the firmware version of the module.
The fifth term is the type of firmware that is in the module
ROM chip.

C–10 Console Commands

The messages in parentheses in the rightmost column
provide additional information about each module. The
meaning of each message depends on the type of module
being described.
For the system module, the three lines in this column
describe base system hardware. The first line lists the
amount of memory in the system. The second line lists
the address for the base system Ethernet controller.
The third line lists the ID number of the base system
SCSI controller.
For TURBOchannel Ethernet controllers, the additional
information is the Ethernet station address.
For TURBOchannel SCSI controllers, the additional
information is the SCSI ID for the SCSI controller.
For graphics modules, the first part of the additional
message identifies the type of graphics module that is
in the system, as follows:
CX indicates that the module is a color frame-buffer

graphics module.

PX indicates that the module is a 2D graphics

accelerator module.

DX indicates that the module is a low 3D graphics

module.

EX indicates that the module is a mid 3D graphics

module.

FX indicates that the module is a high 3D graphics

module.

The second part of the additional message has the form

d=# where # is the number of bits that make up the

pixel depth. The third part of the additional message is
displayed only when a z-buffer option is installed on a
2D graphics accelerator module. The third part of the
additional message has the form z=24.
Individual configuration displays begin with the same line that
describes the module in the general system configuration.

Console Commands C–11

Base system configuration displays

To obtain a base system configuration display, type:
cnfg 3
This is a sample configuration display for the base system
configuration:
3:

KN03-AA

DEC

V5.2A

TCF0

( 24 MB,
1 MB NVRAM)
(enet: 08-00-2b-0f-45-72)
(SCSI = 7)

----------------------------------------------DEV
PID
VID
REV
SCSI DEV
==== ============== ====== ===== ========
tz1
SEQ
rz2
RZ55
(C) DEC DEC
0700
DIR
rz4
RX23
(C) DEC DEC
0700
DIR
dcache

( 64 KB), icache ( 64 KB)

mem( 0):
mem( 1):
mem( 2):
mem(14):

a0000000:a07fffff
a0800000:a0ffffff
a1000000:a17fffff
a1800000:a18fffff

(
(
(
(

mem(14):

clean, bat ok, armed

8 MB)
8 MB)
8 MB)
1 MB)

Presto-NVR

Notice that the display begins with the same information as
in the general system configuration display. The rest of the
display shows details of the devices and memory that are
installed in the base slot. This example shows three devices
and four memory modules.
The following list describes the information about the base
system devices:
DEV lists the general category of the drive and its SCSI ID.
rz indicates that the drive is a hard disk or optical
compact disc drive.
tz indicates that the drive is a tape drive.
The number at the end of the entry is the drive SCSI
ID.
PID lists the product ID for some types of drives.
The term on the left indicates the specific drive type.

C–12 Console Commands

The term on the right indicates the product manufacturer.
VID lists the drive vendor.
REV lists the firmware revision number for the drive.
SCSI DEV further describes the drive type.
DIR, which represents a direct access drive, appears in
entries for hard disk drives.
SEQ, which represents a sequential access drive,
appears in entries for tape drives.
CD-ROM appears in entries for optical compact disc
drives.
The following list describes the information about the base
system memory modules. The items below pertain to the
memory module section of the base system configuration
display, read from left to right.
mem denotes memory module

Memory slot number
Address range
Amount of memory in the slot. The amount can be 8 or
32 megabytes for SIMMs and 1 megabyte for an optional
NVRAM module. Except for the NVRAM module, the same
amount of memory should be displayed for the slots because
all of the SIMMs should be the same size.
This display will reveal a mixed memory installation, but
ULTRIX will not work properly with mixed memory.

Console Commands C–13

Sample Output with R4000 CPU Module

If you have the R4000 CPU module installed, the screen output
will resemble the following:
>>cnfg 3
3: KN05

DEC

V1.0a

TCF0

( 32 MB)
(enet: 08-00-2b-2d-84-c7)
(SCSI = 7)
--------------------------------------------------DEV
PID
VID
REV
SCSI DEV
===== ================== ========== ====== ========
rz1
RZ25 (c) DEC DEC
0500 DIR
rz2
RZ55 (c) DEC DEC
0900 DIR
rz3
RRD42 (c) DEC DEC
1.4a CD-ROM

cache: I( 8 KB), D( 8 KB), S(1024 KB); Scache line (32 bytes)
processor revision (3.0)
mem( 0): a0000000:a07fffff ( 8 MB)
mem( 1): a0800000:a0ffffff ( 8 MB)
mem( 2): a1000000:a17fffff ( 8 MB)
mem( 3): a1800000:a1ffffff ( 8 MB)

cache: I( 8 KB), D( 8 KB), S( 1024 KB); Scache line
(32 bytes) represents the Instruction cache, Data cache,

Secondary cache, and scache line size respectively.
processor revision (3.0) shows the revision of the
installed R4000 CPU module.
Ethernet controller configuration displays

To display an Ethernet controller option module configuration,
type:
cnfg slot_number
Replace slot_number with the slot number of the Ethernet
controller option module.
To see the base system Ethernet controller configuration
display, type:
cnfg 3
The base system Ethernet controller configuration is displayed
with the other base system configuration information.
The following is a sample Ethernet controller configuration
display for an Ethernet controller option module in slot 1:
1:

PMAD-AA

C–14 Console Commands

DEC

V5.2a

TCF0

(enet: 08-00-2b-0c-e0-d1)

The Ethernet controller configuration display has the same
meaning as the Ethernet controller description in the general
system configuration display. For an explanation of the
Ethernet controller configuration display, see the "General
System Configuration Displays" earlier in this appendix.
SCSI controller displays

To display a SCSI controller option module configuration, type:
cnfg slot_number
Replace slot_number with the slot number of the SCSI
controller option module.
To see the base system SCSI controller configuration, type:
cnfg 3
The base system SCSI controller configuration is displayed with
the other base system configuration information.
The following is a sample configuration display for a SCSI
controller in slot 2 that supports two hard disk drives, one
optical compact disk drive, and one tape drive:
2:

PMAZ-AA

DEC
V5.2a
TCF0
(SCSI = 7)
--------------------------------------------DEV
PID
VID
REV
SCSI DEV
==== ============== ====== ===== ========
rz0
RZ55
(C) DEC DEC
0700
DIR
rz1
RZ56
(C) DEC DEC
0200
DIR
rz4
RRD40 (c) DEC DEC
0700
CD-ROM
tz5
SEQ

Console Commands C–15

In the SCSI configuration display, the first line has the same meaning
as the SCSI description in the general system configuration display.
For an explanation of this first line, see "General System Configuration
Displays" earlier in this appendix.
Lines following the first line describe drives on the SCSI bus.
DEV lists the general category of the drive and its SCSI ID.
rz indicates that the drive is a hard disk or optical

compact disc drive.
tz indicates that the drive is a tape drive.
The number at the end of the entry is the drive SCSI
ID.
PID lists the product ID for some types of drives.
The term on the left indicates the specific drive type.
The term on the right indicates the product manufacturer.
VID lists the drive vendor.
REV lists the firmware revision number for the drive.
The SCSI DEV further describes the drive type.
DIR, which represents a direct access drive, appears in
entries for hard disk drives.
SEQ, which represents a sequential access drive,
appears in entries for tape drives.
CD-ROM appears in entries for optical compact disk
drives.
Color frame buffer graphics module configuration displays To obtain a
color frame-buffer graphics module configuration display, type:

cnfg slot_number
Replace slot_number with the slot number for the color framebuffer graphics module for which you want a configuration
display.

C–16 Console Commands

The following is a sample color frame buffer graphics module configuration display for a color frame buffer graphics module in slot 1:
0:

PMAG-BA

DEC

V5.2a

TCF0

(CX -- d=8)

For an explanation of the color frame-buffer graphics module
configuration display see the color frame-buffer graphics module
description for the general system configuration display; see the
"General System Configuration Displays" section earlier in this
appendix.
2D graphics accelerator module configuration displays To obtain a
2D graphics accelerator module configuration display, type:

cnfg slot_number
Replace slot_number with the slot number for the 2D graphics
accelerator module for which you want a configuration display.
The following is a sample configuration display for a 2D
graphics accelerator module in option slot 1:
1: PMAG-AA DEC V5.2a TCF0 (PX---D=8)

The 2D graphics accelerator module display has the same
meaning as the 2D graphics accelerator module description
in the general configuration display. For an explanation of
the 2D graphics accelerator module configuration display, see
"General System Configuration Displays" section earlier in this
appendix.
3D graphics module configuration displays

module configuration display, type:

To obtain a 3D graphics

cnfg slot_number
Replace slot_number with the slot number for the 3D graphics
module.
The following is a sample configuration display for a low 3D
graphics module:
1: PMAG-DA DEC V5.2a TCF0 (DA: PXG---D=8, z=24)

The leftmost column lists the low 3D graphics module slot
number.

Console Commands C–17

PMAG-DA is the part identifier for low and mid 3D graphics
modules. High 3D graphics module displays list PMAG-FA
as the part identifier.
DEC is the module manufacturer.
The fourth column lists the firmware version that each
module contains.
The fifth column lists the firmware type in each module.
The string in the rightmost column indicates the 3D
graphics module type and the number of VSIMMs and
z-buffer modules on the base graphics module.
The left part of the phrase identifies the type of
graphics module in the system.
DA: PXG indicates that the module is a low 3D graphics

module.

EA: PXG indicates that the module is a mid 3D graphics

module.

PXG_T indicates that the module is a high 3D graphics
module.
The right part of the phrase describes the VSIMM and
z-buffer modules. The value after D= is the number of
planes available for color generation. The value after z=
is the number of bits available in the z-buffer modules.
If the string at the end of the 3D cnfg display is (ERR:
invld cnfgtbl) or ends with question marks (???), there
is a problem in the graphics module hardware. Refer to the
TURBOchannel Maintenance Guide to troubleshoot the 3D
graphics module.

C–18 Console Commands

d Command
Use the d command to deposit values in memory.
The d command format is:
d [-(b | h | w)] [-Scount]rng
Use the one of the optional parameters -(b | h | w) to
specify whether to deposit the contents as bytes, halfwords,
or words.
Specify -b to deposit the contents as bytes.
Specify -h to deposit the contents as halfwords.
Specify -w to deposit the contents as words.
Include the optional -Scount parameter to store the same
value more than once. Replace count with the number of
times that you want the value to be stored.
Use the rng parameter to set the range of addresses across
the stored values.
To deposit values at a single address, replace rng with
that address.
To deposit a number of values across a range of
addresses, replace rng with the address range. Use
the form:
address_low:address_high
Replace address_low with the starting address for
storing values and replace address_high with the
ending address for storing values.
To deposit values at a series of addresses, replace rng
with the starting address and the number of successive
addresses at which you want to store values. Use the
form:
address_low#count
to specify the addresses where you store values.
Replace address_low with the starting address for
storing values. Replace count with the number of
values you want to store.

Console Commands C–19

To specify more than one address range, separate the
range specifications with commas. Leave no spaces
between the range specifications.
e Command
Use the e command to examine the contents of a specific
address. The e command format is:
e [-b | h | w] [-c] [-d] [-o] [-u] [-x] [-Scount]rng
Use the optional parameter (-b | h | w) to specify whether
to examine the contents as bytes, halfwords, or words.
Specify -b to examine the contents as bytes.
Specify -h to examine the contents as halfwords.
Specify -w to examine the contents as words.
Specify -x to display the contents in hexadecimal format.
Specify -o to display the contents in octal format.
Specify -u to display the contents in unsigned decimal
format.
Specify -d to display the data in decimal format.
Specify -c to display the data as ASCII characters.
Include the optional -S count parameter to have the
command repeatedly fetch the value, but display the value
only once. When you type this parameter, replace count
with the number of times that you want to fetch the value.
Use the rng parameter to specify the range of addresses
you want to examine.
To examine values at a single address, replace rng with
that address.
To examine values at a range of addresses, replace rng
with the address range. Use the form:
address_low:address_high
to define the range. Replace address_low with the
starting address for storing values and replace address_
high with the ending address for storing values.

C–20 Console Commands

To examine values at a series of addresses, replace rng
with the starting address and the number of successive
addresses you want to examine. Use the form:
address_low#count
to specify the addresses where you store values.
Replace address_low with the starting address for
storing values. Replace count with the number of
addresses at which you want to store values.
To specify more than one address range, separate each
range specification with commas. Leave no spaces
between the ranges.
erl Command
Use the erl command to display or clear the log of errors that
occurred since the most recent power-up or reset operation.
When the buffer that holds these error log fills up, no further
errors are recorded. If you intend to run tests and use these
logs for information, use the erl -c command to clear the logs
first. The erl command format is:
erl [-c]
To display the current error message log, use the erl
command without the -c option.
To clear the error message log, include the -c option. When
the error log buffer is full, no more messages are added
until the buffer is cleared by the erl -c command.
go Command
Use the go command to transfer system control to a specific
system address. The go command format is:
go [address]
To transfer system control to the address specified in the
last boot -n command, type the go command without the
address parameter. If you omit the address parameter, and
if no previous boot -n command has been issued, the system
ignores the go command.

Console Commands C–21

To transfer system control to the contents of a specific
address, include the address parameter. Replace the
address parameter with the address to which you want
to transfer control.
init Command
Use the init command to initialize module hardware. The init
command format is:
init [slot_number] [-m]
To initialize the entire system, specify the init command
with no additional arguments.
To initialize an individual module, replace the optional
slot_number parameter with the slot number of the module
that you want to initialize.
If you perform an init operation on the system module (slot
3), include the optional -m parameter to zero all memory
modules in the system module.
ls Command
Use the ls command to list the scripts and other objects that
are in system ROM. The ls command format is:
ls [slot_number]
To display a list of scripts or other objects that are available
in an individual module, replace the optional slot_number
parameter with the slot number of the module that contains the
files you want to display.
This sample display is a portion of the ls display for the base
system in slot 3:

C–22 Console Commands

>>ls 3
28 1 cnfg -> code
28 1 boot -> code
24 1 rst-q -> rst
24 1 rst-t -> rst
28 1 rst-m ->powerup
32 1 test-ni-m -> test-ni-t
28 1 init -> code
304 1 powerup
44 1 reset
36 1 halt-r
28 1 halt-b
192 1 pst-m
272 1 pst-q
196 1 pst-t
96 1 tech
156 1 test

The third column lists the names of the scripts and other
objects in the module ROM in the specified slot.
passwd Command
Use the passwd command to enter, set, or clear a password.
The passwd command format is:
passwd [-c] [-s]
If the console prompt is R>, you can use only the boot and
passwd commands until you enter the correct password. To
enter an existing password, type the passwd command without
any additional parameters. At the pwd: prompt, enter the
password, then press Return. After you enter the correct
password, or if the system does not require a password, the
system displays the console prompt >>. You can use all console
commands whenever the console prompt is >>.
To clear an existing password, include the -c parameter
when you type the passwd command. First use the passwd
command to enter the existing password. After the console
prompt >> appears, type:
passwd -c
and press Return. The system then removes the password
requirement.

Console Commands C–23

To set a new password, include the -s parameter. Enter the
new password at the pwd: prompt. When the pwd: prompt
appears a second time, type the password again. If the two
password entries match, the system sets the new value as
the password.
The password must have at least 6 and no more than
32 characters. The system is case sensitive and treats
uppercase and lowercase letters as different characters.
printenv Command
Use the printenv command to display the list of environment
variables. The printenv command format is:
printenv [variable]
To display the entire environment variable table, omit the
optional variable parameter.
To display an individual environment variable, replace
variable with the name of the environment variable you
want to display.
restart Command
Use the restart command to restart the system software. For
the restart operation to succeed, the operating system software
must have a restart block set up in memory. The restart
command format is:
restart
script Command
Use the script command to create a temporary set of console
commands that run in an order that you specify. The script
command format is:
script name
Replace name with the name that you are giving the script.
After you press Return, type the commands that you want
to include in the script. Press Return after each command
that you type. Commands can be t or sh commands. Enter
one command per line. When you finish typing the commands

C–24 Console Commands

that you are including, press Ctrl-d or press Return twice to
complete the script. To run the script, use the sh command
described later in this appendix. When you run the script, the
commands execute in the same order as you entered them when
you created the script.
setenv Command
Use the setenv command to change an environment variable.
Table C-2 lists the standard environment variables. When you
change a standard environment variable (except osconsole and
#), the system stores the new value in NVR and uses it until
you use the setenv command to change it again or reset the
NVR with the clear-NVR jumper. The setenv command format
is:
setenv variable value
When you type the setenv command,
Replace variable with the name of the environment variable
you want to set.
Replace value with the new value that you want to assign
to the environment variable. Note that if the new value
contains blank spaces or tabs, you must use double
quotation marks (") at the beginning and end of the value.
Table C-2. Environment Variables for setenv Command
Environment Variable

Description

boot

Sets the default boot path. See the "boot Command"
and the "unsetenv Command" sections in Appendix
C.
Selects the system console.
- Set the console variable to s to enable the terminal
connected to the left comm connector (viewed from
the back) as the active console.

console

(continued on next page)

Console Commands C–25

Table C-2 (Cont.). Environment Variables for setenv Command
Environment Variable

EPAWS

haltaction

Description

- If the console variable is set to anything other than
s, the monitor connected to the graphics module in
the lowest number slot is enabled. If no graphics
module is installed, the terminal connected to the
left serial connector is enabled.
- If the console variable is set to 0 and a graphics
module is installed, the console displays the language
selection menu.
Specifies the way the system responds when a
diagnostic test finds an error.
- Set the EPAWS variable to EPAWS to cause the
system to pause when a diagnostic test finds an
error. Press any key to continue testing.
- If the EPAWS variable is set to any value other
then EPAWS, the system does not pause when an
error occurs.
Specifies the way the system responds when it halts.
- Set the haltaction variable to b to cause the console
to boot after the console performs the appropriate
initialization and self-tests.
- Set the haltaction variable to h to cause the console
to halt and attempt no other action.
- Set the haltaction variable to r to cause the console
to restart and then attempt to boot if the restart
operation fails.
Sets how the screen scrolls lines of text.
- Set the more variable to 0 to have text scroll to the
end before stopping.
- Set the more variable to a number other than zero
to have scrolling pause after that number of lines
has been displayed.
(continued on next page)

C–26 Console Commands

Table C-2 (Cont.). Environment Variables for setenv Command
Environment Variable

Description

osconsole

Contains the slot numbers of the console drivers.
If a TTY driver from slot x serves as the console,
osconsole is set to x. If a CRT driver from slot y
and a kbd driver from slot z serve as the console,
osconsole is set to y,z. Although the environment
variable display includes the osconsole setting, you
cannot set this variable. The system automatically
sets the osconsole value.
Specifies the type of power-up self-test that the
system runs.
- Specify q to run a quick test when the power-up
self-test runs.
- Specify t to specify a thorough test when the
power-up self-test runs.
Specifies the slot number of the module that contains
the current script. If no script is active, the system
specifies the base system module, slot number 3.
Although the environment variable display includes
the # setting, you cannot set this variable.

testaction

sh Command
Use the sh command to run a script. The sh command format
is:
sh [-b] [-e] [-l] [-v] [-S] [slot_number/script] [arg...]
Include the optional -b parameter to execute the script
directly, instead of through a subshell.
Include the optional -e parameter to stop the script if an
error occurs.
Include the optional -l parameter to have the script loop
until you press Ctrl-C.
Include the optional -v parameter to echo the script to the
console as the test runs.
Include the optional -S parameter to suppress any error
messages if the script is not found.

Console Commands C–27

To run a specific script, include the optional slot_number
/script parameter.
Replace slot_number with the slot number of the
module that has the script you want to run.
Replace script with the name of the script you want to
run.
For example, to run the thorough power-up self test script for a
SCSI controller and drives in slot 2, type:
sh 2/pst-t
t Command
Use the t command to run individual tests. The t command
format is:
t [-l] slot_number/test_name [arg...]
Include the optional -l parameter to have the test loop until
you press Ctrl-c or reset the system.
Replace slot_number with the slot number of the module
that you want to test.
Replace test_name with the name of the individual test you
want to run.
Uses for additional arguments depend on the particular
test you are running. For an explanation of the additional
arguments used in an individual test, refer to Appendix D.
To display the name and format of all individual tests for a
module, type:
t slot_number/?
Replace slot_number with the slot number of the module for
which you want to display tests.
test Command
Use the test command to run a thorough test of all system
hardware. The test command format is:
test

C–28 Console Commands

unsetenv Command
Use the unsetenv command to remove an environment variable.
The unsetenv command removes a standard environment
variable (except osconsole and #) during the current session
only. When the system is reset, reinitialized, or powered up,
the values of the standard environment variables revert to
their previously set values. Table C-2 in this appendix lists the
standard environment values.
The unsetenv command format is:
unsetenv variable
When you type the unsetenv command, replace variable with
the name of the environment variable that you want to remove.
Note: To clear the boot environment variable, use setenv command
as follows:

setenv boot

Console Command Error Messages

Table C-3. Console Command Error Messages
Error Message

Description

?EV:ev_name

The specified environment variable
does not exist.
The specified environment variable
value is invalid.
An I/O device reported an error.
slot_number represents the I/O
device slot number, and device
represents an additional message
about the error.

?EVV:value
?IO:slot_number/device

(continued on next page)

Console Commands C–29

Table C-3 (Cont.). Console Command Error Messages
Error Message

Description

?IO:slot_number/device

The module in the slot represented
by slot_number does not recognize
the device represented by device.
The module in the slot represented
by slot_number contains an early
version of firmware. The ROM chip
must be upgraded.
The system did not find the script
that was to be run.
The name specified in the script
command is not a valid script name.
The keyboard self-test failed. This
is an information message and
does not prevent the system from
automatically booting.
A pointing-device self-test failed.
This is an information message and
does not prevent the system from
automatically booting.
A console command contained a
syntax error. The usage parameter
lists the correct syntax.
A console command contained a
syntax error. The error parameter
lists the incorrect portion of the
command.
A test failed. slot_number
represents the slot number of the
module that reported the error,
and test represents the name of the
failed test.
Test not found. The test name was
probably typed incorrectly.

?PDE3: slot_number

?SNF: script
?TXT:
?STF (4: Ln#0 Kbd self test)

?STF (4: Ln#0 Pntr self test)

?STX: usage

?STX: error

?TFL:slot_number/test

?TNF:

C–30 Console Commands

D
Base System Test Commands and
Messages
This appendix describes commands and messages for the
following tests:
System module tests
CPU module tests
Memory module tests
Base system SCSI controller tests
Base system Ethernet controller tests
Initial power-up tests
In addition, Table D-37 lists the diagnostic LED codes and what
they indicate when a power-up self-test fails. The LED codes
provide information for troubleshooting when error messages
are not available.

Base System Test Commands and Messages D–1

Locating Individual Tests in This Appendix
When an individual test fails, the name of the test appears in
the error message. For details of each base system test, see the
section in this appendix that describes the test and its error
messages. The tests are listed in alphabetical order.
When troubleshooting the system, you can use the test
command to run any single test when the console prompt
(>>) appears. You can also write a test script to run a group of
individual test. See the "t Command" and "script Command"
sections in Appendix C for more information.
To help you select the individual tests that apply to a problem
that you are troubleshooting, Table D-1 lists the individual
tests grouped by the function that they test.
Table D-1. Base System Module Test and Utilities
Test or Utility

Command

Base System Module Tests
Halt button test
Nonvolatile RAM
(NVR) test
Overheat detect test
Real-time clock period
test
Real-time clock
register test
Real-time test

t 3/misc/halt [number]
t 3/rtc/nvr [pattern]
t 3/misc/pstemp
t 3/rtc/period
t 3/rtc/regs
t 3/rtc/time

Serial Communications Tests
SCC DMA test
SCC interrupts test

t 3/scc/dma [line] [loopback] [baud]
t 3/scc/int[line]
(continued on next page)

D–2 Base System Test Commands and Messages

Table D-1 (Cont.). Base System Module Test and Utilities
Test or Utility

Command

SCC input/output
(I/O) test
SCC pins test
SCC transmit and
receive test

t 3/scc/io [line] [loopback]
t 3/scc/pins[line] [loopback]
t 3/scc/tx-rx [line] [loopback][baud] [parity] [bits]
CPU module tests

Cache data test
Cache fill test
Cache isolate test
Cache reload test
Cache segment test
Secondary cache test
CPU-type utility
Floating-point unit
test
Translation lookaside
buffer (TLB) probe
test
TLB registers test

t 3/cache/data [cache] [address]
t 3/cache/fill[cache] [offset]
t 3/cache/isol[cache]
t 3/cache/reload[cache] [offset]
t 3/cache/seg[cache] [address]
t 3/scache/data [R4000 only]
t 3/misc/cpu-type
t 3/fpu
t 3/tlb/prb

t 3/tlb/reg [pattern]
Memory module tests

Error correction
coding (ECC)
correction test
Floating 1/0 memory
test
Memory module test
RAM address select
lines test
Partial write test

t 3/ecc/cor [address]

t 3/mem/float10 [address]
t 3/mem[module] [threshold] [pattern]
t 3/mem/select
t 3/misc/wbpart
(continued on next page)

Base System Test Commands and Messages D–3

Table D-1 (Cont.). Base System Module Test and Utilities
Test or Utility

Command

Prcache quick test
Zero memory utility

t 3/prcache
t 3/mem/init
Ethernet Controller Tests

Collision test
Cyclic redundancy
code (CRC) test
Display miantenance
operation protocol
(MOP) counters utility
Ethernet-DMA
registers test
Ethernet-DMA
transfer test
Ethernet station
address ROM (ESAR)
test
External loopback test
Internal loopback test
Interrupt request
(IRQ) test
Multicast test
Promiscuous mode
test
Registers test

t 3/ni/cllsn
t 3/ni/crc
t 3/ni/ctrs

t 3/ni/dma1
t 3/ni/dma2
t 3/ni/esar

t 3/ni/ext-lb
t 3/ni/int-lb
t 3/ni/int
t 3/ni/m-cst
t 3/ni/promisc
t 3/ni/regs
SCSI Tests

SCSI controller test
SCSI send diagnostics
test

t 3/scsi/cntl
t 3/scsi/sdiag scsi_id [d] [u] [s]
(continued on next page)

D–4 Base System Test Commands and Messages

Table D-1 (Cont.). Base System Module Test and Utilities
Test or Utility

Command

SCSI target test

t 3/scsi/target scsi_id [w][lloops]
Keyboard and Mouse Tests

Keyboard test
Mouse test

t 3/misc/kbd
t 3/misc/mouse

Base System Test Commands and Messages D–5

Tests
The following sections explain the commands, parameters, and
error messages for each base system module test. The tests are
presented in alphabetical order.
cache/data - Cache Data Test
The cache data test writes data patterns to the cache and then
reads them. To run the cache data test, type:
t 3/cache/data [cache] [address]
When you type the cache test command:
Replace cache with a value that specifies the cache you
want to test.
Specify I to test the instruction cache.
Specify D to test the data cache. D is the default
value.
Replace the optional address parameter with a specific
cache address where you want the test to start. Using the
address parameter requires familiarity with the firmware
specifications. The default address is 80500000.
Cache data test error messages

Cache data test error messages have the form:
?TFL:3 /cache/data (code: [address=actual, sb expected])
?TFL 3/cache/data indicates that the cache data test
reported an error.
code represents a number that identifies which portion of
the test failed.
The optional address=actual, sb expected phrase
indicates the expected and actual values in the cache.
address represents the address where the error
message occurred.
actual represents the actual value at that address.

D–6 Base System Test Commands and Messages

expected represents the expected value for that

address.

Table D-2 lists codes used in cache data test error messages.
Table D-2. Cache Data Test Error Codes
Error Code

Description

1
2
3
4
5

Error occurred writing data pattern to cache RAM.
Cache parity error occurred while test was reading floating 1.
Error occurred when test read data pattern in cache.
Cache parity error occurred while test was reading floating 0.
Error occurred when test wrote address complement to cache
RAM.
Cache parity data error occurred.
Error occurred reading address complement.
Cache address read caused a parity error.

6
7
8

Base System Test Commands and Messages D–7

cache/fill - Cache Fill Test
The cache fill test writes rotating data patterns to memory in
spans that are twice the size of the cache and then reads the
patterns. To run the cache fill test, type:
t 3/cache/fill [cache] [offset]
When you type the cache fill test command:
Replace cache with a value that specifies the cache you
want to test.
Specify I to test the instruction cache.
Specify D to test the data cache. D is the default
value.
Replace offset with a specific cache address where you want
the test to start. The default address is 80500000.
Cache fill test error messages

Cache fill test error messages have the form:
?TFL: 3/cache/fill (description)
?TFL 3/cache/fill indicates that the cache fill test
reported an error.
description represents an additional message that
describes the error.

D–8 Base System Test Commands and Messages

Table D-3 lists descriptions used in cache fill test error
messages.
Table D-3. Cache Fill Test Error Descriptions
Error Description

Meaning

(PE)
(address= actual, sb expected)

Unexpected parity error occurred.
Data pattern read reported a miscompare.
address represents the address where
the miscompare occurred.
actual represents the actual value at
that address.
expected represents the expected value
for that address.

(PE @ address (C))

Parity error occurred. The address
parameter lists the address where the
error occurred.

Base System Test Commands and Messages D–9

cache/isol - Cache Isolate Test
The cache isolate test isolates data patterns to the cache and
then reads and compares them. To run the cache isolate test,
type:
t 3/cache/isol [cache]
When you type the cache isolate test command, replace cache
with a value that specifies the cache you want to test.
Specify I to test the instruction cache.
Specify D to test the data cache. D is the default setting.
Cache isolate test error messages

Cache isolate test error messages have the form:
?TFL: 3/cache/isol (code: [address=actual, sb expected])
?TFL 3/cache/isol indicates that the cache isolate test

reported an error.
code represents a number that identifies which portion of
the test failed.
The optional phrase address= actual, sb expected
indicates the actual and expected values at the address
where the error occurred.
address represents the address where the error
occurred.
actual represents the actual value at that address.
expected represents the expected value at that
address.

D–10 Base System Test Commands and Messages

Table D-4 lists error codes used in cache isolate test error
messages.
Table D-4. Cache Isolate Test Error Codes
Error Code

Description

1
2
3
4
5
6
7
8
9
10
11
12

Reading 00000000 pattern resulted in a cache parity error.
Reading 00000000 pattern resulted in a cache miss error.
Reading 00000000 pattern returned a data miscompare.
Reading 55555555 pattern resulted in a cache parity error.
Reading 55555555 pattern resulted a cache miss error.
Reading 55555555 pattern resulted in a data miscompare.
Reading AAAAAAAA pattern resulted in a cache parity error.
Reading AAAAAAAA pattern resulted in a cache miss error.
Reading AAAAAAAA pattern resulted in a data miscompare.
Reading data address pattern resulted in a cache parity error.
Reading data address pattern resulted in a parity error.
Reading data address pattern returned a miscompare error.

Base System Test Commands and Messages D–11

cache/reload - Cache Reload Test
The cache reload test writes rotating-parity data patterns to
memory and then reads the patterns. To run the cache reload
test, type:
t 3/cache/reload [cache] [offset]
When you type the cache reload test command:
Replace cache with a value that specifies the cache you
want to test.
Specify I to test the instruction cache.
Specify D to test the data cache. D is the default
value.
Replace offset with a specific cache address where you want
the test to start. The default address is 80500000.
Cache reload test error messages

Cache reload test error messages have the form:
?TFL: 3/cache/reload (description)
?TFL 3/cache/reload indicates that the cache reload test
reported an error.
description represents an additional message that
describes the error.

Table D-5 lists descriptions used in cache reload test error messages.

D–12 Base System Test Commands and Messages

Table D-5. Cache Reload Test Error Descriptions
Error Description

Meaning

(PE)
(address= actual, sb expected)

Unexpected parity error occurred.
Reading a data pattern reported a
miscompare.
address represents the
address where the miscompare
occurred.
actual represents the actual
value at that address.
expected represents the
expected value for that address.

(PE @ address (C))

Parity error occurred. The address
parameter lists the address where
the error occurred.

Base System Test Commands and Messages D–13

cache/seg - Cache Segment Test
The cache segment test checks individual cache segments. To
run the cache segment test, type:
t 3/cache/seg [cache] [address]
When you type the cache segment test command:
Replace the optional cache parameter with a value that
specifies the cache you want to test.
Specify D to test the data cache. D is the default value.
Specify I to test the instruction cache.
Replace address with a specific address you want to test.
The default address is 80500000. Note that using the
optional address parameter correctly requires thorough
knowledge of the firmware specifications.
Cache segment test error messages

Cache segment test error messages have the form:
?TFL: 3/cache/seg (code : description)
?TFL 3/cache/seg indicates that the cache segment test

reported an error.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-6 describes error codes and descriptions used in cache
segment test error messages.

D–14 Base System Test Commands and Messages

Table D-6. Cache Segment Test Error Codes and Descriptions
Error Code Syntax

Description

1: address=xxxxxxxx, sb
yyyyyyyy

Error occurred when the system tried
to read the cache contents. The address
parameter is the actual value at a given
address. The correct value follows.
Error occurred when the system tried to
read the memory contents. The address
parameter is the actual value at a given
address. The correct value follows.
Error occurred when the system performed
a read and write operation on the uncached
memory. The address value is the actual
value at a given address. The correct value
follows.
Cache data was inconsistent. The address
value is the actual value at a given address.
The correct value follows.

2: address= xxxxxxxx, sb
yyyyyyyy

3: address =xxxxxxxx, sb
yyyyyyyy

4: address =xxxxxxxx, sb
yyyyyyyy

Base System Test Commands and Messages D–15

ecc/cor - ECC Correction Test
The error correction coding (ECC) correction test writes data
patterns XOR’d with floating ones to create single bit errors.
then checks to see if the error was detected and corrected. To
run the ECC correction test, type:
t 3/ecc/cor [address]
Replace address with a specific address you want to test. The
default address is A0010000.
ECC correction test error messages

Cache segment test error messages have the form
?TFL: 3/ecc/cor (code : description)
?TFL 3/ecc/cor indicates that the ECC correction test

reported an error.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-7 describes error codes and descriptions used in ECC
correstion test error messages.
Table D-7. ECC Test Error Codes and Descriptions
Error Code and Description

Meaning

(1: xxxxxxxx rd err) [KN03-AA]

Cannot read and write location with
good data.
Single bit error in the data is not
detected.
Single bit error in the data is not
corrected.

(2: sbe not det)
(3: sbe not cor)

D–16 Base System Test Commands and Messages

fpu - Floating-Point Unit Test
The floating-point unit (FPU) test uses the FPU to perform
simple arithmetic and compares the result to known values. To
run the FPU test, type:
t 3/fpu
FPU test error messages

FPU test error messages have the form:
?TFL: 3/fpu (code)
?TFL 3/fpu indicates that the FPU test reported an error.
code represents a number that identifies which portion of

the test failed.

Table D-8 lists error codes used in FPU test error messages.

Base System Test Commands and Messages D–17

Table D-8. FPU Test Error Codes
Error Code

Meaning

1
2
3
4
5

Values did not match. Value should be 00000000.
Values did not match. Value should be 55555555.
Values did not match. Value should be AAAAAAAA.
Values did not match. Value should be FFFFFFFF.
Least-significant bit failed when the system was converting
doubleword to word (CVT D.W.)
Most-significant bit failed when the system was converting
doubleword to word (CVT D.W.)
Double miscompare occurred: n+n-n!=n
Double miscompare occurred: n+n= =n
Convert float-double. Value should be 55555555.
FPU CSR double error occurred.
Single miscompare occurred. n+n-n!=n
Single miscompare occurred. n+n= =n
Convert float-double. Value should be 55555555.
FPU CSR single error occurred. Value should be 00000000.
Single division failed. Value should be 00005555.
Single multiplication failed.
Double multiplication failed.
Double division failed.
Conversion error occurred. Pattern readback did not match.
FPU did not trap on overflow exception.
Did not get FPU interrupt.

6
7
8
9
10
11
12
13
14
15
16
17
18
19
21
22

D–18 Base System Test Commands and Messages

mem - Memory Module Test
The memory module test performs a full pattern test on an
entire memory module. To run the memory module test, type:
t 3/mem [module] [threshold] [pattern] [bank]
When you type the memory module test command:
Include the module parameter to specify which memory
module you want to test.
To test one memory module pair, specify the slot
number of the memory module pair that you want
to test. The default memory module slot number is 0.
To test all memory modules, specify an asterisk (*).
Replace the optional threshold parameter with the number
of single-bit errors the test allows before the test fails. The
default threshold is 10.
Replace the optional pattern parameter with a specific
pattern that you want to use in the test. The default
pattern is 55555555.
Memory module test error messages

Set the verbose environment variable to 1 to see compare error
messages in the following form:
?TFL:3/mem @ address=actual, expected
?TFL 3/mem @ indicates that the memory test reported a

compare error.
The address parameter is the address at which the error
occurred.
actual represents the value at that address.
expected represents the expected value at that address.

Base System Test Commands and Messages D–19

If the verbose environment variable is not set, the error
messages appear in the following formats:
?TFL:3/mem

(1: board, L, MBE=M, SBE=N)

?TFL:3/mem

(2: board, L, too many SBEs :N)

where L represents the slot number of the failed memory
module, M represents the number of multibit errors that
occurred, and N represents the number of single-bit errors that
occurred.
mem/float10 - Floating 1/0 Memory Test
The floating 1/0 memory test writes floating 1 and floating 0
across one location in RAM. To run the floating 1/0 memory
test, type:
t 3/mem/float10 [address] [bank]
Replace the optional address parameter with a specific address
at which you want to start writing 1s. The default address is
A0100000.
Floating 1/0 memory test error messages

If a RAM module is tested, the only floating 1/0 memory test
error message is:
?TFL: 3/mem/float10 (Err= N)

Where N represents the number of errors the memory module
reported.
If an NVRAM module is tested and the module contains valid
data, the floating 1/0 memory test error messages is:
?TFL: (1: (tst nocomp))

D–20 Base System Test Commands and Messages

mem/init - Zero Memory Utility
The zero memory utility floods memory with zeros as fast as
possible. To run the zero memory test, type:
t 3/mem/init
The zero memory utility returns no error codes.
mem/select - RAM Select Lines Test
The RAM select lines test checks for RAM select line faults by
performing a read and write operation on one location in each
memory module. To run the RAM select lines test, type:
t 3/mem/select
RAM select lines test error messages

The only RAM select test error message is:
?TFL: 3/mem/select (address=actual, sb expected)
?TFL: 3/mem/select indicates that the RAM select lines
test reported an error.
address represents the memory address where the error
occurred.
actual represents the actual value at the listed address.
expected represents what the correct value at the listed
address should be.

Base System Test Commands and Messages D–21

misc/cpu-type - CPU-Type Utility
The CPU-type utility displays a message that identifies the
CPU type. To run the CPU-type utility, type:
t 3/misc/cpu-type
CPU-type utility messages

The CPU-type utility has the form:
3/misc/cpu-type’s code NDX-type

Where type represents a code that indicates the type of
CPU module in the system. For example, the code NDX-129A
identifies the KN03-GA module (40 Mhz). The code NDX-111A
identifies the KN05 module (50 Mhz).

D–22 Base System Test Commands and Messages

misc/halt - Halt Button Test
The halt button test checks whether the halt button is
connected and can generate an interrupt. To run the halt
button test, type:
t 3/misc/halt [number]
When you type the halt button command, replace number with
the number that specifies the type of test you want to run.
Specify 0 to check whether the halt button is pressed. If
you specify 0 and the button is pressed when the test runs,
the test reports an error. 0 is the default value.
Specify a number from 1 to 9 to check whether the button
responds when pressed. Press the button the same number
of times as the number you specify in the test command.
Halt button test error messages

There are two halt button test error messages.
?TFL: 3/misc/halt (1:SIR=xxxxxxxx) indicates that the
halt button is pressed in. xxxxxxxx represents the value in

the system interrupt register.

?TFL: 3/misc/halt (2: invld bits: SIR=xxxxxxxx)

indicates that the system interrupt register contains an
impossible combination of halt-button bits. xxxxxxxx
represents the value found in the system interrupt register.

Base System Test Commands and Messages D–23

misc/kbd - Keyboard Test
The keyboard test looks for the presence of a keyboard on the
keyboard/mouse port. The keyboard test is not a loopback test,
although the test will pass if an external loop-back is plugged
into the keyboard/mouse connector.
To run the mouse test, type:
t 3/misc/mouse
Keyboard test error messages

If the keyboard test fails during the automatic power-up selftest sequence, the following messages is displayed:
?STF (4: Ln#0 Kbd self test)

When you enter the keyboard test at the console prompt, the
test fails if the proper values are not returned or an external
loopback connector is not attached.
Note that the missing kbd, mouse or loopback ? error message
does not necessarily indicate a missing device, although that is
the most common reason for that message to appear. It could
also indicate a faulty keyboard device or even a system board
malfunction.
Keyboard test error messages have the form:
?TFL: 3/misc/kbd (code)
?TFL 3/misc/kbd indicates that the keyboard test reported
an error.
code represents a number that identifies which portion of
the test failed.

Table D-9 lists error codes used in keyboard test error
messages.

D–24 Base System Test Commands and Messages

Table D-9. Keyboard Test Error Codes
Error Code

Meaning

1:tx bfr not empty.
status=0X%2X
2:missing kbd, mouse or
loopback?
3:failed selftest: XX XX

Unable to write single character due to
non-empty transmit buffer.
Something is missing or broken in the
keyboard or mouse path.
Invalid character returned by device after
receiving the test command.

Base System Test Commands and Messages D–25

misc/mouse - Mouse Test
The mouse test checks for the presence of a mouse on the
keyboard/mouse port. The mouse test is not a loopback test,
although the test will pass if an external loop-back is plugged
into the keyboard/mouse connector.
To run the mouse test, type:
t 3/misc/mouse
Mouse test error messages

If the mouse test fails during the automatic power-up self-test
sequence, the following error message is displayed:
?STF (4: Ln#0 Pntr self test)

When you enter the mouse test at the console prompt, the
test fails if the proper values are not returned or an external
loopback connector is not attached. Note that the missing
kbd, mouse or loopback ? error message does not necessarily
indicate a missing device, although that is the most common
reason for that message to appear. It could also indicate
a faulty keyboard/mouse device or even a system board
malfunction.
Mouse test error messages have the form:
?TFL: 3/misc/mouse (code)
?TFL 3/misc/mouse indicates that the mouse test reported

an error.
code represents a number that identifies which portion of
the test failed.

Table D-10 lists error codes used in mouse test error messages.

D–26 Base System Test Commands and Messages

Table D-10. Mouse Test Error Codes
Error Code

Meaning

1:tx bfr not empty.
status=0X%2X
2:missing kbd, mouse or
loopback?
3:failed selftest: XX XX

Unable to write single character due to
non-empty transmit buffer.
Something is missing or broken in the
keyboard or mouse path.
Invalid character returned by device after
receipt of test command.

misc/pstemp - Overheat Detect Test
The overheat detect test, checks whether the power supply is
overheating. To run the overheat detect test, type:
t 3/misc/pstemp
Overheat detect test error message

When the overheat detect test fails, the following error message
is displayed:
?TFL: 3/misc/pstemp (system is *HOT*)

This message indicates that the system is overheating.
misc/wbpart - Partial Write Test
The partial write test writes to a specific memory address and
then checks whether the written values are correct. To run the
partial write test, type:
t 3/misc/wbpart
Partial write test error messages

Base System Test Commands and Messages D–27

Partial write test error messages have the form:
?TFL: 3/misc/wbpart (code)
?TFL 3/misc/wbpart indicates that the partial write test

reported an error.
code represents a number that identifies which portion of
the test failed.
Table D-11 lists error codes used in partial write test error
messages.
Table D-11. Partial Write Test Error Codes
Error Code

Meaning

1
2
3
4
5
6
7

Pattern that was read showed mismatch on word access.
Byte 0 failed partial byte write.
Byte 1 failed partial byte write.
Byte 2 failed partial byte write.
Byte 3 failed partial byte write.
Halfword 0 failed partial halfword write.
Halfword 1 failed partial halfword write.

D–28 Base System Test Commands and Messages

ni/cllsn - Collision Test
The collision test checks Ethernet collision detect circuitry by
forcing a collision on transmission. To run the collision test,
type:
t 3/ni/cllsn
Collision test error messages

Collision test error messages have the form:
?TFL: 3/ni/cllsn (code: description)
?TFL: 3/ni/cllsn indicates that the collision test reported
a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.

Table D-12 lists error codes and descriptions used in collision
test error messages.
Table D-12. Collision Test Error Codes and Descriptions
Error Code Syntax

Description

3: cllsn not dtctd

Ethernet controller chip failed to detect an
Ethernet collision.
Ethernet controller chip transmission failed.
Ethernet controller chip failed to initialize.

4: xmt [x]
6: LANCE-init [x]

Base System Test Commands and Messages D–29

ni/common - Common Diagnostic Utilities
The common diagnostic utilities are run by Ethernet controller
tests. You cannot run these diagnostic utilities by themselves.
Common diagnostic utility error messages

Common diagnostic utility error messages have the form:
?TFL: 3/ni/test_name (code: description)
?TFL: 3/ni indicates a common diagnostic utility detected

an error.

test_name represents the name of the test in which the

diagnostic utility detected an error.
code represents a number that identifies which utility
generated the error message.
description represents additional information that
describes the error.

Table D-13 lists error codes and descriptions used in common
diagnostic utility error messages.

D–30 Base System Test Commands and Messages

Table D-13. Common Diagnostic Utility Error Codes and Descriptions
Error Code and Description

Meaning

700: Invld param frmt
[xxxxx]

Parameter was not in a valid format. The
xxxxx value represents the parameter that
had an invalid format.
STOP bit did not halt the Ethernet
controller chip.
Timeout occurred when the system tried to
initialize the Ethernet controller chip.
Timeout occurred waiting for the Ethernet
controller chip to start.
Utility could not initialize the Ethernet
controller chip.
Timeout occurred in the Ethernet controller
chip.
I/O system failure occurred during Ethernet
controller chip initialization.

901: err hltng LANCE
902: LANCE-init timeout
903: LANCE-start timeout
904: err initing LANCE
905: LANCE-stop timeout
906: err initing LANCE

ni/crc - Cyclic Redundancy Code Test
The cyclic redundancy code (CRC) test checks the Ethernet
CRC verification and bad CRC detection abilities. To run the
CRC test, type:
t 3/ni/crc
CRC test error messages

CRC test error messages have the form:
?TFL: 3/ni/crc (code: description)
?TFL: 3/ni/crc indicates that the CRC test reported a

problem.
code represents a number that identifies which portion of
the test failed.
xdescription represents additional information that
describes the failure.

Base System Test Commands and Messages D–31

Table D-14 lists error codes and descriptions used in CRC test
error messages.
Table D-14. CRC Test Error Codes and Descriptions
Error Code and Description

Meaning

2: LANCE-init [x]

System could not initialize the Ethernet
controller chip. The x represents a pass or
fail code returned by one of the utilities that
the test uses.
Error occurred during packet transmission.
The x represents a pass or fail code returned
by one of the utilities that the test uses.
Ethernet chip incorrectly flagged a good
CRC as bad.
Error occurred receiving a packet. The x
represents a pass or fail code returned by
one of the utilities that the test uses.
Error occurred when the test attempted to
initialize the Ethernet controller chip. The
x represents a pass or fail code returned by
one of the utilities that the test uses.
Error occurred transmitting data packet.
The x represents a pass or fail code returned
by one of the utilities that the test uses.
Ethernet chip did not detect a bad CRC in
an incoming packet.
Error occurred in packet receive operation.
The x represents a pass or fail code returned
by one of the utilities that the test uses.

3: xmt [x]

5: fls CRC err
6: rcv [x]

7: LANCE-init [x]

8: xmt [x]

10: bad CRC not dtctd
11: rcv [x]

D–32 Base System Test Commands and Messages

ni/ctrs - Display MOP Counters Utility
The display MOP counters utility displays the current MOP
counters for the base system Ethernet controller. To run the
MOP counters utility, type:
t 3/ni/ctrs
The display MOP counters utility produces no error messages.
ni/dma1 - Ethernet-Direct Memory Access Registers Test
The Ethernet-direct memory access (DMA) registers test checks
the Ethernet-DMA control and error registers. The test then
checks the ability of the system to detect a DMA error. To run
the Ethernet-DMA registers test, type:
t 3/ni/dma1
Ethernet-DMA registers test error messages

Ethernet-DMA registers test error messages have the form:
?TFL: 3/ni/dma1 (code: description)
?TFL: 3/ni/dma1 indicates that the Ethernet-DMA

registers test reported a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-15 lists error codes and descriptions used in EthernetDMA registers test error messages.

Base System Test Commands and Messages D–33

Table D-15. Ethernet-DMA Registers Test Error Codes and Descriptions
Error Code and Description

Meaning

1: LDP wrt/rd [w=xxxxxxxx
r=yyyyyyyy]

LDP register values matched when they
should not. The w parameter is the value
that was written to the LDP register. The r
parameter is the value that was read from
the LDP register.
LANCE I/O slot register values matched
when they should not. The w parameter is
the value that was written to the LANCE
I/O Slot register. The r parameter is the
value that was read from the LANCE I/O
Slot register.
LANCE I/O Slot register failed to select the
LANCE.
LANCE I/O Slot register failed to deselect
the LANCE.
Ethernet controller chip initialization failed.
Timeout occurred waiting for the LANCE
initialization to finish.
Page boundary error was not recorded in
the MER register.
LANCE memory error bit was not set in the
SIR register.
Timeout occurred waiting for LANCE to
start.

LIOS wrt/rd [w=xxxxxxxx
r=yyyyyyyy]

3: LANCE select
4: LANCE deselect
5: err initing LANCE
6: LANCE-init timeout
7: MER
8: SIR
9:LANCE-start timeout

D–34 Base System Test Commands and Messages

ni/dma2 - Ethernet-Direct Memory Access Transfer Test
The Ethernet-direct memory access (DMA) transfer test checks
Ethernet DMA operation. To run the Ethernet-DMA transfer
test, type:
t 3/ni/dma2
Ethernet-DMA transfer test error messages

Ethernet-DMA transfer test error messages have the form:
?TFL: 3/ni/dma2 (code: description)
?TFL: 3/ni/dma2 indicates that the Ethernet-DMA transfer

test reported a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.

Table D-16 lists error codes and descriptions used in Ethernet
-DMA transfer test error messages.

Base System Test Commands and Messages D–35

Table D-16. Ethernet-DMA Registers Test Error Codes and Descriptions
Error Code and Description

Meaning

2: LANCE-init [xxxxxxxx]

Ethernet controller chip initialization failed.
xxxxxxxx represents a code that describes
the LANCE failure.
Ethernet controller chip transmission failed.
xxxxxxxx represents a code that describes
the transmission failure. The sz parameter
is the packet size. The ptrn parameter is
the pattern the test tried to transmit.
Ethernet controller chip receive operation
failed. xxxxxxxx represents a code that
describes the receive failure. The sz
parameter is the packet size. The ptrn
parameter is the pattern the test tried to
receive.
DMA error occurred after a packet was
received.
DMA error occurred when the test began.
DMA error occurred after a packet was
transmitted.

3: xmt [xxxxxxxx] sz=yyyy
ptrn=AA

4: rcv [xxxxxxxx] sz=yyyy
ptrn=AA

8: LANCE-DMA
9: LANCE-DMA
10: LANCE-DMA

D–36 Base System Test Commands and Messages

ni/esar - Ethernet Station Address ROM Test
The Ethernet station address ROM (ESAR) test checks the
ESAR on the Ethernet controller. To run the ESAR test, type:
t 3/ni/esar
ESAR test error messages

ESAR test error messages have the form
?TFL: 3/ni/esar (code: description)
?TFL: 3/ni/esar indicates that the ESAR test reported a

problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-17 lists error codes and descriptions used in ESAR test
error messages.
Table D-17. ESAR Test Error Codes and Descriptions
Error Code and Description

Meaning

2: ESAR[0-5] = 0’s
3: ESAR[0] = brdcst-sdrs
5: checksum
7: rvrs cpy !=
8: frwrd cpy !=
9: ESAR[24-28] !=FF
10: ESAR[25-29] !=00
11: ESAR[26-30] =55
12: ESAR[27-31] !=AA

First 6 bytes of the ESAR were 000000.
ESAR contained broadcast address.
ESAR checksum verification failed.
Reverse copy mismatch occurred.
Forward copy mismatch occurred.
Test pattern FF mismatch occurred.
Test pattern 00 mismatch occurred.
Test pattern 55 mismatch occurred.
Test pattern AA mismatch occurred.

Base System Test Commands and Messages D–37

ni/ext-lb - External Loopback Test
The external loopback test checks the Ethernet controller and
its connection to the network.
Before you run the external loopback test on the base system
Ethernet controller, first install a ThickWire loopback connector
on the Ethernet controller. To run the external loopback test,
type:
t 3/ni/ext-lb
External loopback test error messages

External loopback test error messages have the form:
?TFL: 3/ni/ext-lb (code: description)
?TFL: 3/ni/ext-lb indicates that the external loopback
test reported a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.

Table D-18 lists error codes and descriptions used in external
loopback test error messages.

D–38 Base System Test Commands and Messages

Table D-18. External Loopback Test Error Codes and Descriptions
Error Code and Description

Meaning

1: (LANCE-init [xxxxxxxx])

LANCE initialization failed. xxxxxxxx
represents a code that describes the LANCE
failure.
LANCE initialization failed. xxxxxxxx,
yyyyyyyy represents a code that describes
the LANCE failure. zzzzz represents a code
that describes the likely cause of the failure.
System did not receive packet. xxxxxxxx,
yyyyyyyy represents a code that describes
the receive failure.
Transmitted packet was not received.
Fatal error occurred.

3: (xmit [xxxxxxxx, yyyyyyyy]
zzzzz)

4: rcv [xxxxxxxx, yyyyyyyy]

6: pkt-data !=
7

ni/int - Interrupt Request Test
The interrupt request (IRQ) test checks whether the Ethernet
controller can generate an interrupt to the R3000A chip. To run
the IRQ test, type:
t 3/ni/int
IRQ test error messages

IRQ test error messages have the form:
?TFL: 3/ni/int (code: description)
?TFL: 3/ni/int indicates that the IRQ test reported a

problem.
code represents a number that identifies the type of failure
that occurred.
description represents additional information that
describes the failure.

Base System Test Commands and Messages D–39

Table D-19 lists error codes and descriptions used in IRQ test error
messages.
Table D-19. IRQ Test Error Codes and Descriptions
Error Code Syntax

Description

1: int pndng
2: init LANCE err = x

Pending interrupt was invalid.
Error occurred when the system tried to
initialize the Ethernet controller chip.
System generated no interrupt on packet
transmission.

4: intr err xmt-stat=x

D–40 Base System Test Commands and Messages

ni/int-lb - Internal Loopback Test
The internal loopback test sends and receives data packets
to and from Ethernet in internal loopback mode. To run the
internal loopback test, type:
t 3/ni/int-lb
Internal loopback test error messages

Internal loopback test error messages have the form:
?TFL: 3/ni/int-lb (code: description)
?TFL: 3/ni/int-lb indicates that the internal loopback

test reported a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-20 lists the error codes and error descriptions used in
internal loopback test error messages.

Base System Test Commands and Messages D–41

Table D-20. Internal Loopback Test Error Codes and Descriptions
Error Code Syntax

Description

1: rd ESAR err

The system could not access the Ethernet
station address ROM.
Error occurred initializing the Ethernet
controller chip. xxxxxxxx represents a code
that describes the transmission failure.
System did not transmit packet. xxxxxxxx
represents a code that describes the
transmission failure. The sz parameter is
the size of the packet. The ptrn parameter
is the pattern that was in the packet.
System did not receive packet. xxxxxxxx
represents a code that describes the failure.
The sz parameter is the size of the packet.
The ptrn parameter is the pattern that was
in the packet.
Packets received and packets sent had
different sizes.
Data received and data sent did not match.
Received CRC was incorrect.

2: LANCE-init [xxxxxxxx]

3: xmt [xxxxxxxx] sz=yyyy
ptrn=zz

4: rcv [xxxxxxxx] sz=yyyy
ptrn=zz

5: rcvd size=x, xptd=x
6: pkt-data !=
7:

D–42 Base System Test Commands and Messages

ni/m-cst - Multicast Test
The multicast test checks the Ethernet ability to filter multicast
packets. To run the multicast test, type:
t 3/ni/m-cst
Multicast test error messages

Multicast test error messages have the form:
?TFL: 3/ni/m-cst (code: description)
?TFL: 3/ni/m-cst indicates that the multicast test reported
a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.

Table D-21 lists the error codes and descriptions used in
multicast test error messages.

Base System Test Commands and Messages D–43

Table D-21. Multicast Test Error Codes and Descriptions
Error Code Syntax

Description

1: rd ESAR err

Error occurred reading Ethernet station
address ROM.
System failed to initialize the Ethernet
controller chip. xxxxxxxx represents a code
that describes the initialization failure.
Ethernet controller failed to send packet.
xxxxxxxx represents a code that describes
the transmission failure.
Ethernet controller received a multicast
packet when multicast function was
disabled.
Packet receive routine reported an error.
xxxxxxxx represents a code that describes
the receive error.
Error occurred when the system tried to
initialize the Ethernet chip. xxxxxxxx
represents a code that describes the
initialization error.
Ethernet controller failed to transmit
packet. xxxxxxxx represents a code that
describes the transmission error.
Ethernet did not receive expected packet.
xxxxxxxx represents a code that describes
the receive error.

2: LANCE-init [xxxxxxxx]

3: xmt [xxxxxxxx]

5: rcvd invld m-cst

6: rcv [xxxxxxxx]

7: LANCE-init [xxxxxxxx]

8: xmt [xxxxxxxx]

9: rcv [xxxxxxxx]

D–44 Base System Test Commands and Messages

ni/promisc - Promiscuous Mode Test
The promiscuous mode test checks that the Ethernet controller
can receive packets in promiscuous mode. To run the
promiscuous mode test, type:
t 3/ni/promisc
Promiscuous mode test error messages

Promiscuous mode test error messages have the form:
?TFL: 3/ni/promisc (code: description)
?TFL: 3/ni/promisc indicates that the promiscuous mode

test reported a problem.
code represents a number that identifies the type of failure
that occurred.
description represents additional information that
describes the failure.
Table D-22 lists error codes and descriptions used in promiscuous mode test error messages.

Base System Test Commands and Messages D–45

Table D-22. Promiscuous Mode Test Error Codes and Descriptions
Error Code Syntax

Description

2: LANCE-init [xxxxxxxx]

Ethernet controller initialization failed.
xxxxxxxx represents a code that describes
the initialization failure.
Packet transmission failed. xxxxxxxx
represents a code that describes the
transmission failure.
An inappropriate packet was received in
nonpromiscuous mode.
Packet receive routine failed.
System failed to initialize Ethernet
controller in promiscuous mode. xxxxxxxx
represents a code that describes the
initialization failure.
Packet transmission failed. xxxxxxxx
represents a code that describes the
transmission failure.
Ethernet did not receive the expected packet
while in promiscuous mode. xxxxxxxx
represents a code that describes the receive
failure.

3: xmt [xxxxxxxx]

5: rcvd invld adrs
6: rcv [xxxxxxxx]
7: LANCE-init [xxxxxxxx]

8: xmt [xxxxxxxx]

9: rcv [xxxxxxxx]

D–46 Base System Test Commands and Messages

ni/regs - Registers Test
The registers test performs a read and write operation on the
Ethernet registers. To run the registers test, type:
t 3/ni/regs
Registers test error messages

Registers test error messages have the form:
?TFL: 3/ni/regs (code: description)
?TFL: 3/ni/regs indicates that the registers test reported

a problem.
code represents some number that identifies which portion
of the test failed.
description represents additional information that
describes the failure.
The CSR[n] parameter, where n represents the number
of a specific CSR register, indicates the actual value in
the CSR register.
The xpctd parameter indicates the expected value for
the same CSR register.
Table D-23 lists error codes and descriptions used in registers
test error messages.

Base System Test Commands and Messages D–47

Table D-23. Registers Test Error Codes and Descriptions
Error Code Syntax

Description

1: CSR[n]=x - xpctd 0

Write and read operation to
Ethernet CSR[n] failed. The n
represents the number of the CSR
involved in the failure.
Writing and reading 0xFFFE failed
on CSR 1. xxxx represents the
actual value in CSR 1.
Writing and reading 0x00FF failed
on CSR 2. xxxx represents the
actual value in CSR 2.
Bit leak from CSR2 to CSR1
occurred. xxxx represents the actual
value in CSR[1].
Bit leak from CSR1 to CSR2
occurred. xxxx represents the actual
value in CSR[2].
Immediate write and read failure
occurred.

3: CSR[1]=xxxx - xpctd 0xFFFE

4: CSR[2]=xxxx - xpctd 00FF

5: CSR[1]=xxxx - bit lk frm CSR[2]

6: CSR[2]= xxxx - bit lk frm CSR[1]

7: Immediate write/read flr

D–48 Base System Test Commands and Messages

prcache - Prcache Quick Test
The prcache quick test of NVRAM on power-up tests the scratch
area of the optional NVRAM module. The diagnostic status bit
in the diagnostic register on the NVRAM module is set on
failure. The optional NVRAM module can be installed in
memory slot 14, and is different form the system module NVR
that is tested by the rtc/nvr test. To run the prcache quick test,
type:
t 3/prcache
For a thorough test, first zero the NVRAM memory, then type:
t 3/prcache/clear
Then run the memory test by typing:
t 3/mem 14
Prcache quick test error messages

Prcache quick test error messages have the form:
?TFL: 3/prcache (code: description)
?TFL: 3/prcache indicates that the prcache quick test

reported a problem.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-24 lists error codes and descriptions used in registers
test error messages.

Base System Test Commands and Messages D–49

Table D-24. Prcache Quick Test Error Codes and Descriptions
Error Code Syntax

Description

1: board 14: MBE = X SBE = Y

X multiple bit errors and Y single bit
errors occurred on the NVRAM board in
slot 14.
Too many single bit errors. X single bit
errors occurred on the NVRAM board in
slot 14.

2: board 14, too many SBEs: X

prcache/arm - Disconnect Battery
The prcache/arm command turns off the battery on the prestonvram module. To run the prcache/arm command, type:
t 3/prcache/arm [board]
When you type the prcache/arm command, replace the optional
board parameter with the slot number of the NVRAM module.
Because the DECstation 5000 Model 240 must have the
NVRAM module installed in slot 14, the default value is set
at 14.
Prcache/arm command error message

If the prcache/arm command does not complete successfully, it
returns the following error message:
?TFL: 3/prcache/arm (1:(tst nocomp))

D–50 Base System Test Commands and Messages

prcache/clear - Zero NVRAM Memory
The prcache/clear command quickly writes zeros to all NVRAM
memory addresses. To run the prcache/clear command, type:
t 3/prcache/clear [board]
When you type the prcache/clear command, replace the optional
board parameter with the slot number of the NVRAM module.
Because the DECstation 5000 Model 240 must have the
NVRAM module installed in slot 14, the default value is set
at 14.
If the prcache contains valid data, the system responds with
the following prompt:
prcache valid data - wrt ? (1/0)

Type 1 to clear the cache. Type 0 to cancel the prcache/clear
command.
Prcache clear error message

If the prcache/clear command does not complete successfully, it
returns the following error message:
?TFL: 3/prcache/clear (1:(tst nocomp))

prcache/unarm - Connect battery
The prcache/unarm command turns on the battery on the
presto-nvram module. To run the prcache/unarm command,
type:
t 3/prcache/unarm [board]
When you type the prcache/arm command, replace the optional
board parameter with the slot number of the NVRAM module.
Because the DECstation 5000 Model 240 must have the
NVRAM module installed in slot 14, the default value is set
at 14.
Prcache/unarm command error message

The prcache/unarm command does not return an error message.

Base System Test Commands and Messages D–51

rtc/nvr - Nonvolatile RAM Test
The nonvolatile RAM (NVR) test checks the system module
nonvolatile RAM. The system module NVR is not the same as
the NVRAM cache module. To run the NVR test, type:
t 3/rtc/nvr [pattern]
When you type the NVR test command, replace the optional
pattern parameter with a specific pattern that you want to use
in the test. The default pattern is 55.
NVR test error messages

NVR test error messages have the form
?TFL: 3/rtc/nvr (code: address=actual, sb expected)
?TFL 3/rtc/nvr indicates that the NVR test read an

incorrect pattern from the NVR.
code represents a number that identifies which portion of
the test failed.
address represents the address at which the error occurred.
actual represents the value at that address.
expected represents the expected value at that address.

D–52 Base System Test Commands and Messages

rtc/period - Real-Time Clock Period Test
The real-time clock (RTC) period test checks the RTC periodic
interrupt operation. To run the RTC period test, type:
t 3/rtc/period
RTC period test error messages

RTC period test error messages have the form:
?TFL: 3/rtc/period/(code)
?TFL 3/rtc/period indicates that the RTC period test

reported an error.
code represents a number that identifies which portion of
the test failed.
Table D-25 lists error codes used in RTC period test error messages.
Table D-25. RTC Period Test Error Codes
Error
Code

1
2
3

Meaning

Update-in-progress (UIP) bit remained set past allotted time.
Real-time clock interrupt was pending when it should not have
been.
Allowed time ran out while waiting for interrupt.

Base System Test Commands and Messages D–53

rtc/regs - Real-Time Clock Registers Test
The real-time clock registers test checks the real-time clock
(RTC) registers. To run the real-time clock registers test, type:
t 3/rtc/regs
Real-time clock registers test error messages

Real-time clock register test error messages have the form:
?TFL: 3/rtc/regs (code: description)
?TFL 3/rtc/regs indicates that the real-time clock register

test reported an error.
code represents a number that identifies which portion of
the test failed.
description represents additional information that
describes the failure.

Table D-26 lists error codes and descriptions used in real-time
clock register test error messages.
Table D-26. Real-Time Clock Register Test Error Codes
Error Code:Description

Meaning

1
2 register=actual, sb expected

UIP bit remained set past allotted time.
The test failed to write pattern correctly.
The register value is the actual value in the
named register, followed by the expected
value.

D–54 Base System Test Commands and Messages

rtc/time - Real-Time Test
The real-time test checks times generated by the real-time clock
against hard-coded time values. To run the real-time test, type:
t 3/rtc/time
Real-time test error messages

Real-time test error messages have the form:
?TFL: 3/rtc/time (code)
?TFL 3/rtc/time indicates that the real time test reported
an error.
code represents a number that identifies which portion of
the test failed.

Table D-27 lists error codes used in real-time test error
messages.
Table D-27. Real-Time Test Error Codes
Error
Code

1
2
3
4
5
6
7
8
9
10
12
13

Meaning

UIP bit remained set past allotted time.
Real-time clock interrupt was pending when it should not have
been.
Allowed time ran out while waiting for interrupt.
Allowed time ran out while waiting for second interrupt.
UIP bit remained set past second allotted time.
Real-time clock seconds were not set to 0 on wraparound.
Real-time clock minutes were not set to 0.
Real-time clock hours were not set to 0.
Real-time clock day-of-the-week was not set to 1.
Real-time clock date was not set to 1.
Real-time clock month was not set to 1.
Real-time clock year was not set to 0.

Base System Test Commands and Messages D–55

scache/data - Secondary Cache Test
This test run patterns through secondary cache RAM. To run
the scache data test, type
t 3/scache/data
and press Return.
The secondary cache is implemented on the daughter-card as
11 16-bit wide static RAMs. This 176 (11 times 16) wire Scache
interface is divided-up as follows:
25 Tag wires
07 Tag ECC wires
128 Data wires
16 Data ECC wires
Scache Error

Any error reported by the scache/data test indicate a fault
in the secondary cache RAMs or in the interconnect between
the R4000 and the secondary cache. Errors reported by this
diagnostic could also be due to errors in reading or writing
the memory; in-order to eliminate this possibility, first run the
memory diagnostics.

D–56 Base System Test Commands and Messages

scc/access - Serial Communication Chip Access Test
The serial communication chip (SCC) access test checks
whether the system can perform a read and write operation
on the SCC. To run the SCC access test, type:
t 3/scc/access
SCC access test error messages

The only SCC access test error message is:
?TFL: 3/scc/access (1:LnM reg-N: actual=0xXX xpctd=0xYY)
?TFL: 3/scc/access indicates that the read and write

operation on the SCC failed.
M represents the number of the serial line in which the
error occurred.
N represents the number of the register that failed the test.
The actual value is the value in that register.
The xpctd value is the expected value for that register.
scc/dma - Serial Communication Chip Direct Memory
Access Test
The serial communication chip (SCC) direct memory access
(DMA) test checks the ability of the serial communication and
IO-ASIC chips to perform a DMA operation. To run the SCC
DMA test, type:
t 3/scc/dma [line] [loopback] [baud]
Replace the optional line parameter with a value that
specifies which line to test.
Specify 2 to test serial line number 2. 2 is the default
value.
Specify 3 to test serial line number 3.

Base System Test Commands and Messages D–57

Replace the optional loopback parameter with a value that
specifies the type of loopback the test performs.
Specify intl to run an internal loopback. Intl is the
default type of loopback that the test performs.
Specify extl to run an external loopback.
Replace baud with the baud rate at which you want the test
to run. You can specify one of the following baud rates:
300
1200
2400
4800
9600
19200
38400
The default baud rate is 38400.

D–58 Base System Test Commands and Messages

SCC DMA test error messages

SCC DMA test error message have the form:
?TFL: 3/scc/dma code:LnN SIR_xptd=xxxxxxxx SIR=yyyyyyyy
SSR=zzzzzzzz
?TFL: 3/scc/dma indicates that the SCC DMA test reported

an error.
code represents a number that identifies which part of the
test failed.
N represents the number of the serial line that reported the
error.
The SIR_xpted value is the expected value for the system
interrupt register.
The SIR value is the actual value in the system interrupt
register.
The SSR value is the value in the system status register.
Table D-28 discusses the codes used in SCC DMA test error
messages.
Table D-28. SCC DMA Test Error Codes
Error
Code

Meaning

1
2
3
4

SIR values are invalid.
Miscompare occurred during DMA read and write operation.
Overrun occurred in the receive buffer.
Interrupt signal was not sent to the system.

Base System Test Commands and Messages D–59

scc/int - Serial Communication Chip Interrupts Test
The serial communication chip (SCC) interrupts test checks the
ability of the SCC to perform internal, external, and countdown
interrupts. To run the SCC interrupts test, type:
t 3/scc/int
SCC interrupts test error messages

SCC interrupts test error messages have the form:
?TFL: 3/scc/int (code: lnN RR0=xx RR3=yy SIR=zzzzzzzz)
?TFL: 3/scc/int indicates that the SCC interrupts test

reported an error.
code represents a number that indicates which portion of
the test reported the error.
If the number is an odd number, the bits to set the
interrupt on were invalid.
If the number is an even number, the bits to set the
interrupt off were invalid.
N represents the number of the serial line in which the
error occurred.
The RR0 value is the contents of the SCC read register 0.
The RR3 value is the contents of the SCC read register 3.
The SIR value is the contents of the system interrupt
register.

D–60 Base System Test Commands and Messages

scc/io - Serial Communication Chip I/O Test
The serial communication chip (SCC) I/O test checks the ability
of the SCC to perform an I/O operation on a serial line. To run
the SCC I/O test, type:
t 3/scc/io [line] [loopback]
When you type the SCC I/O test command:
Replace the optional line parameter with a value that
specifies which line to test.
Specify 0 to test serial line 0. 0 is the default serial
line.
Specify 1 to test serial line 1.
Specify 2 to test serial line 2.
Specify 3 to test serial line 3.
Replace the optional loopback parameter with a value that
specifies the type of loopback operation the test performs.
Specify intl to run an internal loopback operation. Intl
is the default type of loopback that the test performs.
Specify extl to run an external loopback operation.
SCC I/O test error messages

SCC I/O test error messages have the form:
?TFL: 3/scc/io (code: LnN description)
?TFL: 3/scc/io indicates that the SCC I/O test reported an

error.

code represents a number that identifies which portion of

the test failed.
N represents the number of the line in which the error
occurred.
description represents additional information that
describes the error.

Base System Test Commands and Messages D–61

Table D-29 lists error codes and descriptions used in SCC I/O
test error messages.
Table D-29. SCC I/O Test Error Codes and Descriptions
Error Code Syntax

Description

1: LnN tx bfr not empty.
status=xx

System could not write a single character
because the transmit buffer was not empty.
N represents the line in which the error
occurred. The status value is the contents
of read register 0.
CHAR AVAIL signal not received when
the system was expecting a character.
N represents the line in which the error
occurred. The status value is the contents
of read register 0.
The character that was received was
different than the transmitted character.
N represents the line in which the error
occurred. The xx represents the transmitted
value. The yy represents the received value.
The status value is the contents of read
register 0.

2: LnN char not rcvd.
status=x

3: LnN expctd=xx, rcvd=yy,
status=zz

D–62 Base System Test Commands and Messages

scc/pins - Serial Communication Chip Pins Test
The serial communication chip (SCC) pins test checks the
control pins on the communications connectors. To run the SCC
pins test, type:
t 3/scc/pins [line] [attachment]
Replace the optional line parameter with a value that
specifies the communications connector that you want to
test.
Specify 2 to test the communications connector on the
right as you face the back of the system unit.
Specify 3 to test the communications connector on the
left as you face the back of the system unit.
Replace the optional attachment parameter with a value
that specifies the loopback hardware that you attach to the
communications connector being tested.
Specify 29-24795 if you attach a 29-24795 loopback
connector. 29-24795 is the default type of loopback
connector.
Specify H8571 if you attach an H8571 loopback
connector.
Specify hm if you attach an hm loopback connector.
Specify H3200 if you attach an H3200 loopback
connector.
Table D-30 lists the specific pin pairs that each loopback test
checks.

Base System Test Commands and Messages D–63

Table D-30. Pin Pairs Tested by Individual Loopback Connectors
Loopback
Connector

Pins Pairs Tested

Description

29-24795

4-5
23-6-8

H3200

4-5
6-20
12-23
4-5
20-6-8

RTS to CTS
SS to DSR and CD
6-23 failure implies 6 broken.
8-23 failure implies 8 broken.
6-23 8-23 failure implies 23 broken.
RTS to CTS
DSR to DTR
SI to SS
RTS to CTS
DTR to DSR and CD
6-20 failure implies 6 broken.
8-20 failure implies 8 broken.
6-20 8-20 failure implies 20 broken.
RTS to CTS

H8571-A

4-5

SCC pins test error messages

SCC pins test error message have the form:
?TFL: 3/scc/pins (code: LnN: description)
?TFL: 3/scc/pins indicates that the SCC pins test reported

an error.
N represents the number of the serial line in which the
error occurred.
description represents additional information that
describes the error.

Table D-31 lists error codes and descriptions used in SCC pins
test error messages.

D–64 Base System Test Commands and Messages

Table D-31. SCC Pins Test Error Codes and Descriptions
Error Code and Syntax

Description

1:LnN Invld param [xxxxx]

The number used in the test command
to specify the loopback was invalid. N
represents the number of the serial line in
which the error occurred. xxxxx represents
the first two characters of the invalid value
that was specified.
Test failed to generate the expected SCC
status bits. N represents the number of
the serial line in which the error occurred.
The Strtup R value is the number of SCC
register that contains the status bits. The
xptd value is the expected status bits. The
actl value is the actual status bits. Pins
represents the pin pairs for which the test
was set up.
Pins failed to respond properly. xxxxx
represents the numbers of one or more pin
pairs that failed the test.

2:LnN Startup R-xx xptd=yy
actl= zz | pins |

3: LnN xxxxx

Base System Test Commands and Messages D–65

scc/tx-rx - Serial Communication Chip Transmit and Receive
Test
The serial communication chip (SCC) transmit and receive
test checks the ability of the SCC to transmit and receive
information. To run the SCC transmit and receive test, type:
t 3/scc/tx-rx [line] [loopback] [baud] [parity] [bits]
Replace the optional line parameter with a value that
specifies which serial line to test.
Specify 0 to test serial line 0, the default serial line.
Specify 1 to test serial line 1.
Specify 2 to test serial line 2.
Specify 3 to test serial line 3.
Replace the optional loopback parameter with a value that
specifies the type of loopback operation the test performs.
Specify intl to run an internal loopback operation. Intl
is the default type of loopback.
Specify extl to run an external loopback operation.
Replace the optional baud parameter with a value that
specifies the baud rate at which the test runs. You can
specify one of these baud rates:
300
1200
2400
3600
4800
9600
19200
The default baud rate is 9600.
Replace the optional parity parameter with a value that
specifies the type of parity that the test uses.
Specify none to use no parity. None is the default value.
Specify odd to use odd parity.
Specify even to use even parity.
D–66 Base System Test Commands and Messages

Replace the optional bits parameter with a value that
specifies the number of bits per characters that the test
uses.
Specify 8 to use eight bits per character. 8 is the
default value.
Specify 7 to use seven bits per character.
Specify 6 to use six bits per character.
SCC transmit and receive test error messages

SCC transmit and receive test error message have the form:
?TFL: 3/scc/tx-rx (code:LnN description)
?TFL: 3/scc/tx-rx indicates that the SCC transmit and
receive test failed.
code represents a number that indicates which portion of
the test failed.
description represents additional information that
describes the error.

Table D-32 lists the error codes and descriptions used in SCC
transmit and receive error messages.

Base System Test Commands and Messages D–67

Table D-32. SCC Transmit and Receive Test Error Codes and Descriptions
Error Code and Description

Meaning

1: LnN tx bfr not empty.
status=xx

System could not write a single character
because the transmit buffer was not empty.
N represents the line in which the error
occurred. The status value is the contents
of SCC read register 0.
CHAR AVAIL signal not received when
the system was expecting a character.
N represents the line in which the error
occurred. The status value is the contents
of SCC read register 0.
The character that was received was
different than the transmitted character.
N represents the line in which the error
occurred. The xx represents the transmitted
value. The yy represents the received value.
The status value is the contents of SCC
read register 0.
Receiving character in FIFO reported an
error. N represents the line in which
the error occurred. The errs value is the
associated input character FIFO error bits.

2: LnN char not rcvd.
status=xx

3: LnN expctd=xx, rcvd=yy,
status=zz

4: LnN Rx err. errs=xx

D–68 Base System Test Commands and Messages

scsi/cntl - SCSI Controller Test
The SCSI controller test checks SCSI controller operation. To
run the SCSI controller test, type:
t 3/scsi/cntl
SCSI controller test error messages

SCSI controller test error messages have the form:
? TFL: 3/scsi/cntl (code: description)
?TFL 3/scsi/cntl indicates that the SCSI controller test

failed.
code represents a number that indicates which portion of
the test failed.
description represents additional information that
describes the failure.
Table D-33 lists error descriptions used in SCSI controller test
error messages.
Table D-33. SCSI Controller Error Codes and Descriptions
Error Code
Syntax

1: rd cnfg
2: fifo flg
3: cnt xfr
4: illg cmd
5: int reg
6: rd cnfg

Description

Values written to and read from configuration register did
not match.
First in, first out (FIFO) load and FIFO flags did not
match.
Write and read operation on TCL register reported a
mismatch.
Command was illegal and did not generate an interrupt.
Controller cannot clear internal interrupt register.
Mismatch occurred when reading the write/read
configuration register.

Base System Test Commands and Messages D–69

scsi/sdiag - SCSI Send Diagnostics Test
The SCSI send diagnostics test runs the self-test for an
individual SCSI device. You can specify whether the test
alters drive parameters and includes a write operation. To run
the SCSI send diagnostics test, type:
t slot_number/scsi/sdiag scsi_id [d] [u] [s]
Replace slot_number with the slot number of the module to
be tested.
Replace scsi_id with the SCSI ID of the device you want to
test. The default SCSI ID is 0.
Include the optional d and u parameters to specify the
conditions that those parameters set for the specific drive
you are testing. Note that the result of including d and u
depends on the specific drive. To determine the effect of
including d and u, refer to the service guide for the drive
that you want to test.
Include the optional s parameter to suppress the error
message display.
SCSI send diagnostics test error messages

SCSI send diagnostic test error messages have the form:
?TFL: 3/sdiag (code: description)
?TFL 3/scsi/sdiag indicates that the SCSI send diagnos-

tics test reported an error.
code represents a number that indicates which portion of
the test failed.
description represents additional information that
describes the failure.

Table D-34 lists error codes and descriptions used in SCSI send
diagnostics test error messages.

D–70 Base System Test Commands and Messages

Table D-34. SCSI Send Diagnostics Test Error Descriptions
Error

Description

1: dev ol
2: dev ol
3: sdiag

Test could not bring the unit on line.
Test could not bring the unit on line.
Device failed the send diagnostics test.

scsi/target - SCSI Target Test
The SCSI target test performs a read test on a specific SCSI
device. If you include the optional write parameter, the test
also performs a write test. To run the SCSI target test, type:
t 3/scsi/target scsi_id [w] [l loops]
Replace the scsi_id parameter with the SCSI ID of the
device you want to test.
Specify the optional w parameter to include a write
operation in the SCSI target test.
Specify the optional l parameter to have the test repeat up
to 9 times. If you include the l parameter, replace loops
with the number of times you want the test to repeat.
Caution: This test can destroy existing data if run with the w option.
The test writes over existing data at random.
SCSI target test error messages

SCSI target test error messages have the form:
?TFL: 3/scsi/target (code: description)
?TFL 3/scsi/target indicates that the SCSI target test
reported an error.
code represents a number that indicates which portion of
the test failed.
description represents additional information that
describes the failure.

Base System Test Commands and Messages D–71

Table D-35 lists error codes and descriptions used in SCSI
target test error messages.
Table D-35. SCSI Target Test Error Codes and Descriptions
Error Code Syntax

Description

1: ( dev ol) N

Test could not bring the device on line. N
represents the SCSI ID of the device that could
not be brought on line.
Command entered from the keyboard aborted the
test. N represents the SCSI ID of the device being
tested.
Test cannot perform write operation. Device is a
read-only device. N represents the SCSI ID of the
device specified in the test.
Test does not test on the specified device. N
represents the SCSI ID of the device specified
in the test.
Read capacity command failed. N represents the
SCSI ID of the device that could not be brought on
line.
Write operation failed. N represents the SCSI ID of
the device that failed.
Read operation failed. N represents the SCSI ID of
the device that failed.
Write and read values did not match. N represents
the SCSI ID of the device involved in the
miscompare.
Write file mark failed. N represents the SCSI ID of
the device being tested.
Write operation failed. N represents the SCSI ID of
the device that failed.
Write file mark failed. N represents the SCSI ID of
the device being tested.
Space (-2) operation failed. N represents the SCSI
ID of the device involved in the failure.
Space (1) operation failed. N represents the SCSI
ID of the device involved in the failure.

2: (tst nocomp) N

3: (ro dev) N

4: (dev type) N

6: (rdCap) N

7: (rzWr) N
8: (rzRd) N
9: (cmp) N

10: (wrFlMrk) N
11: (tzWr) N
12: (wrFlMrk) N
13: (spc) N
14: (spc) N

(continued on next page)

D–72 Base System Test Commands and Messages

Table D-35 (Cont.). SCSI Target Test Error Codes and Descriptions
Error Code Syntax

Description

15: (tzRd) N

Read operation failed. N represents the SCSI ID of
the device being tested.
Write and read values did not match. N represents
the SCSI ID of the device involved in the
miscompare.

16: (cmp) N

Base System Test Commands and Messages D–73

tlb/prb - Translation Lookaside Buffer Probe Test
The translation lookaside buffer (TLB) probe test checks
whether all TLB registers respond to an address match
operation. To run the TLB probe test, type:
t 3/tlb/prb
TLB probe test error messages

The only TLB probe test error message is:
?TFL: 3/tlb/prb (match(0, N)=actual, sb expected)
?TFL: 3/tlb/prb (match(0,N)) indicates that the value
at address 0 did not match the value at the address
represented by N.
actual represents the actual value found at the address
represented by N.
expected represents the expected value at the address
represented by N.

D–74 Base System Test Commands and Messages

tlb/reg - Translation Lookaside Buffer Registers Test
The translation lookaside buffer (TLB) registers test performs a
read and write operation on the TLB. To run the TLB registers
test, type:
t 3/tlb/reg [pattern]
Replace the optional pattern parameter with the pattern you
want to use for the read and write operation. The default
pattern is 55555555.
TLB registers test error messages

TLB registers test error messages have the form:
?TFL: 3/tlb/regs (description)
?TFL 3/tlb/regs indicates that the TLB registers test

reported an error.
description represents additional information that
describes the error.

Table D-36 lists descriptions used in TLB registers test error
messages.
Table D-36. TLB Registers Test Error Descriptions
Error Description

Meaning

tlblo [N]= actual, sb expected

Pattern in TLB LO register was not the
expected pattern. N represents the number
of the register with the incorrect value. The
actual and expected values follow.
Pattern in TLB HI register was not the
expected pattern. N represents the number
of the register with the incorrect value. The
actual and expected values in the register
follow.

tlbhi [N]= actual, sb expected

Base System Test Commands and Messages D–75

Diagnostic LED Array Codes
The system completes a series of tests and other functions
whenever you turn on the system power. If the system halts
at one of these functions, the diagnostic LED ARRAY displays
a code that indicates where in the power-up sequence the
system halted. Table D-37 lists the hexadecimal equivalent of
the power-up LED displays and what they indicate about the
power-up sequence.
Table D-37. Power-Up LED Displays
LED Pattern

Hexadecimal
Equivalent

1111 1111

0011 1111
0011 0101
0011 0110
0011 0111
0011 1110

3F
35
36
37
3E

0011 1101

xxxx 1011

xxxx 0011

xxxx 0010

xxxx 0001

0000 0000

Description

Initial power-on and hardware
initialization.
Firmware initialization started.
Initialized I/O ASIC1 .
Firmware memory test of first 256Kb.
Firmware calculating the cache size.
Calibration of millisecond (ms) delay
loop.
Power-up versus reset setup code
running, memory and modules being
configured.
Loading console from module x where
x represents the slot number.
Error reported during the power-up
self-test (pst) where x represents the
slot number of the option module.
Firmware in module x started to
execute. x represents the slot number
of the module.
System software loaded from module
xstarted, where x represents the slot
number of the module.
The system detected no errors during
the power-up sequence.

1 Input/Output Application-Specific Integrated Circuit

D–76 Base System Test Commands and Messages

E
CPU and System Registers
This appendix describes the CPU and system registers. The
CPU and system registers contain information that can be
useful when troubleshooting.
There are two types of R3000 registers:
R3000A CPU registers
Model 240 system registers
The system automatically displays R3000A CPU register
information on the screen when exceptions occur. Use the e
command in console mode to access system registers.

CPU and System Registers E–1

CPU Registers
Table E-1 lists the CPU registers.
Table E-1. R3000A CPU Registers
Register

Description

Cause
EPC
Status
BadVAddr

Cause of last exception
Exception program counter
Status register
Bad virtual address (read only)

When an exception occurs, the system automatically displays
CPU in one of two formats.
The first format is as follows
?TFL slot_number/test-name (CUX, cause= xxxxxxxx) [KN03-GA]
?TFL slot_number/test-name (UEX, cause= xxxxxxxx) [KN03-GA]

where
slot_number = Slot number of the option being tested
test-name = Test being run
cause = Cause register

E–2 CPU and System Registers

The second format is as follows (R3000 CPU module):
? PC: 0x451<vtr=nrml>
? CR: 0x810<ce=0,ip4,exc=AdEL>
? SR: 0x30080000<cu1,cu0,cm,ipl=8>
? VA: 0x0x451
? ER: i0x100003f0
? MER: 0x2000

where
PC = Address of the exception instruction
CR = Cause register
SR = Status register
VA = Virtual address of the exception
ER = Error address register
MER = Memory error register

The second format for the R4000 CPU module is as follows:
???
? PC: 0xbfc0cd60 <vtr=TLBM>
? CR: 0x00000008 <CE=0,EXC=TLBL>
? SR: 0x30010002 <CU1,CU0,DE,IPL=8,MODE=KNL,EXL>
? CFG: 0x10410243 <SB=8W,SC=Y,IC=8K,DC=8K,IB=4W,DB=4W,K0=CNC>
? VA: 0x00000000
?
? MB_CS: 0x00008000 <MSK=0,EE,ECC=0>
? MB_INT: 0x001f0000 <>

Note that the last two lines of the R4000 display is different
than the R3000 display. The description of these two registers
is beyond the scope of this guide.
Refer to Chapter 9 for detailed troubleshooting information.

CPU and System Registers E–3

CPU Registers for R4000 Only

Table E-2. R4000 CPU Registers
Register

Description

Cause
EPC
Status
BadVAddr
Error EPC
Config

Cause of last exception
Exception program counter
Status register
Bad virtual address (read only)
Error Exception program counter
Configuration register

E–4 CPU and System Registers

Cause Register (R3000 Only)
The cause register is a 32-bit read/write register that describes
the nature of the last exception. A 4-bit exception code indicates
the cause of the exception, and the remaining fields contain
detail information relevant to the handling of certain types of
exceptions.
The branch delay (BD) bit indicates whether the EPC was
adjusted to point at the branch instruction that precedes
the next restartable instruction. For a coprocessor unusable
exception, the coprocessor error (CE) field indicates the
coprocessor unit number referenced by the instructions that
caused the exception.
The interrupt pending (IP) field indicates which external,
internal, coprocessor, and software interrupts are pending.
You can write to  1  0 to set or reset software interrupts. The
remaining bits,  7  2 , are read only and represent external,
internal, or coprocessor interrupts.
The number and assignment of the IP bits are implementation
dependent. R3000A processors have six external interrupts,
where IP5 is used for the MIPS floating-point coprocessor
interrupt. IP2 is normally used for system bus (I/O) interrupts.
The cause register has the following format:

31
30
29 28 27
16
+-----+-----+------+----------------------------------+
| BD | 0 | CE |
0
|
+-----+-----+------+----------------------------------+
1
1
2
12
15
8 7
6 5
2 1
0
+---------------------------+------+------------+-----+
|
IP
| 0
| ExcCode
| 0 |
+---------------------------+------+------------+-----+
8
2
4
2

BD indicates whether the last exception occurred during
execution in a branch delay slot (0 = normal, 1 = delay slot).
CE indicates the coprocessor unit number reference when a
coprocessor unusable exception occurs.

CPU and System Registers E–5

IP indicates whether an interrupt is pending.
ExcCode is the exception code field. Table E-3 list the
exception codes and their meanings.
0 is unused (ignored on write, zero when read).
Table E-3. Exception Codes
Number

Mnemonic

Description

0
1
2

Int
Mod
TLBL

3
4

TLBS
AdEL

5
6
7

AdES
IBE
DBE

8
9
10
11
12
13-31

Sys
Bp
RI
CpU
OV

Interrupt
TLB modification exception
TLB miss exception (load or instruction
fetch)
TLB miss exception (store)
Address error exception (load or instruction
fetch)
Address error exception (store)
Bus error exception (instruction fetch)
Bus error exception (data reference: load or
store)
Syscall exception
Breakpoint exception
Reserved instruction exception
Coprocessor unusable exception
Arithmetic overflow exception
reserved

Cause Register (R4000 Only)
The R4000 Cause register for the most part is the same
as the R3000 register. The R3000 uses a 4-bit exception
code (ExcCode) while the R4000 uses a 5-bit exception code
(ExcCode). There is also some new exception codes. Table E-4
list the exception code and a description of each code.

E–6 CPU and System Registers

Table E-4. Exception Codes R4000
Number

Mnemonic

Description

0
1
2

Int
Mod
TLBL

3
4

TLBS
AdEL

5
6
7

AdES
IBE
DBE

8
9
10
11
12
13
14
15
16-22
23
24-30
31

Sys
Bp
RI
CpU
OV
Tr
VCEI
FPE
WATCH
VCED

CPU and System Registers E–7

Exception Program Counter (EPC) Register (R3000 and R4000)
The EPC register for the R3000 and R4000 indicates the virtual
address at which the most recent exception occurred. This
register is a 32-bit read-only register that contains an address
at which instruction processing can resume after an exception
is serviced. For synchronous exceptions, the EPC register
contains the virtual address of the instruction that was the
direct cause of the exception. When that instruction is in a
branch delay slot, the EPC register contains the virtual address
of the immediately preceding branch or jump instruction.
If the exception is caused by recoverable, temporary conditions
(such as a TLB miss), the EPC register contains a virtual
address at the instruction that caused the exception. Thus,
after correcting the conditions, the EPC registers contains a
point at which execution can be legitimately resumed. The EPC
register has the following format:

31
0
+-----------------------------------------------------+
|
EPC
|
+-----------------------------------------------------+
32

EPC is the exception program counter.

E–8 CPU and System Registers

Status Register (R3000 Only)
The status register (SR) is a 32-bit read/write register that
contains the kernel/user mode, interrupt enable, and diagnostic
state of the processor. The SR contains a three-level stack
(current, previous, and old) of the kernel/user (KU) bit and
the interrupt enable (IE) bit. The stack is pushed when each
exception is taken. The stack is popped by the restore from
exception (RFE) instruction. These bits can also be directly
read or written.
The status register has the following format:
31
28 27
16
+------------------------------+----------------------+
|
CU
|
DS
|
+------------------------------+----------------------+
18
12
15
8 7
6
5
4
3
2
1
0
+------------+-----+-----+-----+-----+-----+-----+-----+
|
IM
| 0 | KUo | IEo | KUp | IEp | KUc | IEc |
+------------+-----+-----+-----+-----+-----+-----+-----+
8
2
1
1
1
1
1
1

The coprocessor usability (CU) field is a 4-bit field that
individually controls the usability of each of the four
coprocessor unit numbers (1 = usable, 0 = unusable).
Coprocessor zero is always usable in kernel mode,
regardless of the setting of the CU0 bit.
The diagnostic status (DS) field is an implementationdependent 12-bit diagnostic status field that is used for
self-testing and checking of the cache and virtual memory
system. For a detailed description of the DS field, see the
‘‘Diagnostic Status field’’ section.
The interrupt mask field (IM) is an 8-bit field that controls
the enabling of each of eight external interrupt conditions.
It controls the enabling of each of the external, internal,
coprocessor, and software interrupts (0 = disable, 1 =
enable). If interrupts are enabled, an external interrupt
occurs when corresponding bits are set in both the interrupt
mask field of the SR and the interrupt pending (IP) field
of the cause register. The actual width of this register is
CPU and System Registers E–9

machine dependent. For a description of the IP field, see
‘‘Cause register’’ section of this appendix.
KUo is the old kernel/user mode (0 = kernel, 1 = user).
IEo is the old interrupt enable setting (0 = disable, 1 =
enable).
KUp is the previous kernel/user mode (0 = kernel, 1 = user).
IEp is the previous interrupt enable setting (0 = disable, 1
= enable).
KUc is the current kernel/user mode (0 = kernel, 1 = user).
IEc is the current interrupt enable setting (0 = disable, 1 =
enable).
Diagnostic status field

The diagnostic facilities depend on the characteristics of the
cache and virtual memory system of the implementation.
Therefore, the layout of the diagnostic status field is implementation dependent. The diagnostic status field is normally
used for diagnostic code, and in certain cases, for operating
system diagnostic facilities (such as reporting parity errors).
On some machines it is used for relatively rare operations
such as flushing caches. Normally, this field should be set to
0 by operating system code. The diagnostic status bits are
BEV, TS, PE, CM PZ, SwC, and IsC. This set of bits provides
a complete fault detection capability, but is not intended to
provide extensive fault diagnosis.
The diagnostic status field has the following format:

27
23 22
21
20
19
18
17
16
+-----------------+-----+----+----+----+----+-----+-----+
|
0
| BEV | TS | PE | CM | PZ | SwC | IsC |
+-----------------+-----+----+----+----+----+-----+-----+
5
1
1
1
1
1
1
1
BEV controls the location of UTLB miss and general

exception vectors (0 = normal, 1 = bootstrap).
TS indicates that TLB shut down occurred.

E–10 CPU and System Registers

PE indicates that a cache parity error occurred. This bit can
be cleared by writing 1 to this bit position.
CM indicates whether a data cache miss occurred while the
system was in cache test mode (0 = hit, 1 = miss).
PZ controls the zeroing of cache parity bits (0 = normal, 1 =
parity forced to zero).
SwC controls the switching of the data and instruction
caches (0 = normal, 1 = switched).
IsC controls isolation of the cache (0 = normal, 1 = cache
isolated).
0 is unused (ignored on write, zero when read).

Status Register (R4000 Only)
The status register (SR) is a 32-bit read/write register that
contains the kernel/user mode, interrupt enable, and diagnostic
state of the processor. The SR contains the kernel, user,
supervisor, error level, exception level, and the interrupt enable
(IE) bit. These bits can also be directly read or written.
The status register has the following format:
31
28 27 26 25 24
16
+---------+---+---+---+----------------------------------+
|
CU
|RP |FR |RE |
DS
|
+---------+---+---+---+----------------------------------+
4
1 1
1
9
15
8 7
6
5
4 3
2
1
0
+------------+----+----+-----+-------+-----+-----+----+
|
IM
| KX | SX | UX | KSU | ERL | EXL | IE |
+------------+----+----+-----+-------+-----+-----+----+
8
1
1
1
2
1
1
1

The (CU) coprocessor usability field is a 4-bit field that
individually controls the usability of each of the four
coprocessor unit numbers (1 = usable, 0 = unusable).
Coprocessor zero is always usable in kernel mode,
regardless of the setting of the CU0 bit.
The (RP) reduce power enables reduced-power operation by
reducing the internal clock frequency.
The (FR) floating-point register enables additional floatingpoint registers (0-16 registers; 1-32 registers).

CPU and System Registers E–11

The (RE) reverse endian when set reverse byte orientation
in User mode.
The (DS) diagnostic status field is an implementationdependent 9-bit diagnostic status field that is used for
self-testing and checking of the cache and virtual memory
system. See ‘‘Diagnostic Status Field’’ for a detailed
description of the DS field.
The interrupt mask field (IM) is an 8-bit field that controls
the eight external, internal, coprocessor, and software
interrupts (0 = disable, 1 = enable). If interrupts are
enabled, an external interrupt occurs when corresponding
bits are set in both the interrupt mask field of the SR and
the interrupt pending (IP) field of the cause register.
The (KX) enables 64-bit addressing in Kernel mode.
The (SX) enables 64-bit addressing and operations in
supervisor mode.
The (UX) enables 64-bit addressing and operations in user
mode.
The (KSU) Mode (10-User, 01_supervisor, 00-Kernel)
The (ERL) Error level (0-normal, 1-error)
The (EXL) Exception level (0-normal, 1-exception)
Diagnostic Status Field

following format:

The Diagnostic Status field has the

24 23 22 21 20 19 18 17 16
+----+-----+--+--+--+--+--+--+
| 0 | BEV |TS|SR|0 |CH|CE|DE|
+----+-----+--+--+--+--+--+--+
2
1
1 1 1 1 1 1

The following Table E-5 describes the Diagnostic Status Fields:

E–12 CPU and System Registers

Table E-5. Diagnostic Status Fields
Field

Description

BEV

Controls the location of TLB refill and general exception
vectors. (0 -> normal; 1 -> bootstrap)
TLB shutdown has occurred (read-only)
A soft reset has occurred
"Hit" (tag match and valid state) or "miss" indication for
last CACHE Hit Invalidate, Hit Write Back Invalidate, Hit
Write Back, Hit Set Virtual, or Create Dirty Exclusion for a
secondary cache.
Contents of the ECC register are used to set or modify the
check bits of the caches when CE equals 1.
Specifies that cache parity or ECC errors are not to cause
exceptions
Reserved. Must be written as zeroes, returns zeroes when
read

TS
SR
CH

CE
DE
0

BadVAddr Register (R3000 and R4000)
The bad virtual address (BadVAddr) register for the R3000
and R4000 is a 32-bit read-only register that contains the most
recently translated virtual address for which a translation error
occurred.
The bad virtual address register has the following format:

+------------------------------------------------------+
|
BadVAddr
|
+------------------------------------------------------+

BadVAddr is the bad virtual address.

CPU and System Registers E–13

Error Exception Program Counter (Error EPC)(R4000 Only)
The Error EPC register is similar to the EPC register, but it
is used on ECC and parity error exceptions. It is also used to
store the PC on Reset, Soft Reset and NMI exceptions. The
address may be either:
the virtual address of the instruction that caused the
exception, or
the virtual address of the immediately preceding branch or
jump instruction when that address is in a branch delay
slot.
There is no branch delay slot indication for the ErrorEPC
register, the ErrorEPC register has the following format.
31
0
+--------------------------------------------------------+
|
ErrorEPC
|
+--------------------------------------------------------+
32

Configuration Register (R4000 Only)
The Configuration Register (Config) specifies various
configuration options selected on R4000 processors. Some
configuration options, as defined by Config bits 31...6, are set
by the hardware during reset, and are included in this register
as read-only status for software. Other configuration options
are read/write (defined by Config bits 5..0) and controlled
by software; on reset these fields are undefined. The Config
register has the following format:
31
12 11 9 8 6 5 4
3 2
0
+----------------------------------+----+----+--+--+--+----+
|
Hardware Parameters
| IC | DC |IB|DB|CU| K0 |
+----------------------------------+----+----+--+--+--+----+
3
3
1
1 1
3
Bits 31..12 indicate the setting of hardware parameters
which are loaded from the serial ROM on the daughter card.
For more information on these bits refer to the MIPS R4000
Microprocessor User’s Manual.

E–14 CPU and System Registers

Table E-6. Config Registers
Field/Bit
Name

IC
DC
IB
DB
CU

Description

Primary ICache Size (ICache size = 2 12+IC bytes)
Primary DCache Size (DCache size = 2 12+DC bytes)
Primary ICache block size (1 -> 32 bytes; 0 ->16 bytes)
Primary DCache line size (1 -> 32 bytes; 0 ->16 bytes)
Update on Store Conditional (0 -> Store Conditional uses
coherency algorithm specified by TLB; 1 -> SC uses cacheable
coherent update on write)
kesg0 coherency algorithm (2 -> uncached, 3 -> cached, non
coherent)

CPU and System Registers E–15

System Registers
This section describes the system registers used for
troubleshooting.
Data Buffers 3 to 0
The data buffers are general-purpose 32-bit read-write registers
used by the I/O control ASIC. For test purposes, these registers
can be read and written. Any DMA or access to a peripheral
device can overwrite these registers. To ensure proper testing,
disable all DMA engines.
Table E-7 lists the system registers.
Table E-7. System Registers
Register

Console Address

Description

SSR
SIR
Mask
EAR
ES
CS

0xBF840100
0xBF840110
0xBF840120
0xBFA40000
0xBFA80000
0xBFAC0000

System support register
System interrupt register
System interrupt mask register
Error address register
Memory error check/syndrome register
Memory bank size and ECC diagnostics
register

Use the e command to examine the contents of a system
register from the console. Enter the e command in the following
format:
e [options] [console_address]
See Appendix C, ‘‘Console Commands,’’ for information about
the formats and options used with the e command and the other
console commands.

E–16 CPU and System Registers

System Support Register (SSR)
The system support register (SSR) can be both read from and
written to. Bits <31:16> are used internally by the I/O control
ASIC. Bits <15:0> generate signals visible outside the I/O
control ASIC. Table E-8 shows the meaning of each bit position
of the SSR.
Table E-8. System Support Register 0xBF840100
Bits

Access

Description

R/W

27:23
22
21
20
19
18

R/W
R/W
R/W
R/W
R/W
R/W

17
16
15
14:13
12
11
10
9
8
7..0

R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W

Communication port 1 transmit DMA enable
(1=enable, 0=disable)
Communication port 1 receive DMA enable (1=enable,
0=disable)
Communication port 2 transmit DMA enable
(1=enable, 0=disable)
Communication port 2 receive DMA enable (1=enable,
0=disable)
Reserved.
Reserved
Reserved
Reserved
Reserved
SCSI DMA direction, 0 = transmit (read from
memory)
SCSI DMA enable (1=enable, 0=disable)
LANCE DMA enable (1=enable, 0=disable)
DIAGDN (diagnostic flag)
TXDIS (serial transmit disable)
Reserved
SCC reset (active low)
RTC reset (active low)
53C94 SCSI controller reset (SCSI active low)
LANCE reset (Ethernet active low)
LEDs

CPU and System Registers E–17

SSR<31>
When set to 1, this bit enables communication port 1
(serial line 2) to transmit DMA to SCC(0)-B. Communication
port 1 is the right comm port, viewed from the back.
SSR<30>
When set to 1, this bit enables communication port 1
(serial line 2) to receive DMA from SCC(0)-B. Communication
port 1 is the right comm port, viewed from the back.
SSR <29>
When set to 1, this bit enables communication port 2 (serial
line 3) to transmit DMA to SCC(1)-B. Communication port 2 is
the left comm port, viewed from the back.
SSR <28>
When set to 1, this bit enables communication port 2 (serial
line 3) to receive DMA from SCC(1)-B. Communication port 2 is
the left comm port, viewed from the back.
SSR <27:19>
These bits are reserved.
SSR <18>
This bit, set to 0 on power up or reset, determines the direction
of the SCSI DMA transfer. If the bit is 0, then memory data
will be supplied to the 53C94 SCSI controller upon demand
from the address specified by the SCSI DMA pointer. If the bit
is set to 1, data bursts of two words supplied from the 53C94
SCSI controller are written to memory.
SSR <17>
When set to 1, this bit enables SCSI DMA; 0 disables it.
SSR <16>
When set to 1, this bit enables LANCE DMA so that the
Ethernet interface can begin data transfer.

E–18 CPU and System Registers

SSR <15> DIAGDN
This bit reflects the state of the DIAGDN pin on the
motherboard, which is used by manufacturing diagnostics.
SSR <14:13> TXDIS
The bits allow diagnostics to disable the EIA drivers on the
serial lines.
When TXDIS are 0’s, the EIA drivers are active. When TXDIS
are 1’s, the EIA drivers are disabled.
Since the TXDIS signals are automatically cleared at power up
or reset, the EIA drivers are enabled by default.
TXDIS<0> disables communication port 1 (serial line 2) and the
mouse, and TXDIS<1> disables communication port 2 (serial
line 3) and the keyboard.
SSR <12>
This bit is reserved.
SSR <11>
This signal can be read from and written to. The SCC UARTS
are placed in a hard reset state when this bit is 0. This bit is
cleared to 0 at power up or reset, resetting the two SCC’s.
SSR <10>
This bit can be read from and written to. The time-of-year
controller is placed in a hard reset state when this bit is 0.
This bit is cleared to 0 at power up or reset, resetting the TOY.
When reset, the TOY loses neither its date nor its 50 bytes of
permanent storage.
SSR <9>
This bit can be read from and written to. The 53C94 SCSI
controller is placed in a hard reset state when this bit is 0. This
bit is cleared to 0 at power up or reset, resetting the 53C94
SCSI controller.

CPU and System Registers E–19

SSR <8>
This bit can be read from and written to. LANCE is placed in
a hard reset state when this bit is 0. This bit is cleared to 0 at
power up or reset, resetting LANCE.
SSR <7:0>
These bits determine the on/off state of the diagnostic LEDs.
When a register bit is 0, the corresponding LED is on. When a
register bit is 1, the corresponding LED is off. Since the LEDs
bits are automatically cleared at power up or reset, all the
LEDs are initially on.
Note: The relationship between the state of these register bits and

the on/off state of the LEDs is the opposite of the LED error codes
represented in a table in Chapter 9 and in Appendix D. In the cited
tables, the on state is represented by 1 and the off state is represented
by 0. Remember that the cited tables have nothing to do with the
register bits.

The correspondence between these register bits and the
diagnostic LEDs is not one to one right to left. Table E-9
lists the LED controlled by each register bit. The LEDs are
numbered 0 to 7 right to left when viewed from the rear.
Table E-9. LEDs Controlled by SSR LEDS Register Bits
Bit

LED Controlled

0
1
2
3
4
5
6
7

3
2
1
0
7
6
5
4

E–20 CPU and System Registers

System Interrupt Register (SIR)
The SIR register consists of two sections. Bits <31:16> are set
by the DMA engine for sundry DMA conditions. These bits
are always set by the system and can be cleared by writing 0
to them. Writing 1 has no effect. These bits are cleared to 0
during system power up or reset.
Bits <15:0> reflect the status of specific system devices and are
read only. A few of these are not usually used as interrupts
and should be masked. These bits may or may not be reset to
0 during system power up reset, depending on the state of the
interrupting device.
Table E-10. System Interrupt Register 0xBF840110
Bits

Access

Description

31
30

R/W0C
R/W0C

29
28
27
26

R/W0C
R/W0C
R/W0C
R/W0C

25
24
23
22
21
20
19
18
17
16
15

R/W0C
R/W0C
R/W0C
R/W0C
R/W0C
R/W0C
R/W0C
R/W0C
R/W0C
R/W0C
R

Communication port 1 transmit page end interrupt
Communication port 1 transmit DMA memory read
error
Communication port 1 receive half page interrupt
Communication port 1 receive DMA page overrun
Communication port 2 transmit page end interrupt
Communication port 2 transmit DMA memory read
error
Communication port 2 receive half page interrupt
Communication port 2 receive DMA overrun
Reserved
Reserved
Reserved
Reserved
SCSI DMA interrupt, (DMA buffer pointer loaded)
SCSI DMA overrun error
SCSI DMA memory read error
LANCE DMA memory read error
Reserved
(continued on next page)

CPU and System Registers E–21

Table E-10 (Cont.). System Interrupt Register 0xBF840110
Bits

Access

Description

14
13
12
11
10
9
8
7
6
5
4
3
2
1
0

R
R
R
R
R
R
R
R
R
R
R
R
R
R
R

NVR mode jumper
TURBOchannel slot 2 interrupt
TURBOchannel slot 1 interrupt
TURBOchannel slot 0 interrupt
NRMOD manufacturing mode jumper
SCSI interrupt from 53C94 SCSI controller
Ethernet interrupt
SCC(1) serial interrupt (communication 2 and keyboard)
SCC(0) serial interrupt (communication 1 and mouse)
TOY interrupt
PSWARN power supply warning indicator
Reserved
SCSI data ready
PBNC
PBNO

Note: Communication port 1 is the same as serial line 2.

Communication port 2 is the same as serial line 3.

SIR<31>
This interrupt is generated by the communication port 1
transmit DMA logic. The DMA transmitter, when enabled,
transmits bytes until the pointer reaches a 4-Kbyte page
boundary. At this point it stops DMA and interrupts the
processor. DMA is disabled whenever this bit is set. To restart,
clear this bit by writing 0; writing 1 has no effect.
SIR<30>
When a parity error, page crossing error, or maximum transfer
length error occurs during a communication transmit port
1 DMA, this bit is set and the DMA is disabled. The DMA
pointer contains the error address. Check the memory sections
for more information. To restart, software must clear this bit by
writing 0; writing 1 has no effect.

E–22 CPU and System Registers

SIR<29>
When the receive DMA pointer associated with communication
port 1 reaches a half page (2-Kbyte) boundary, this bit is set.
Software must disable DMA and then load a new pointer
and restart DMA without being interrupted. Clear this bit
by writing 0; writing 1 has no effect. The value of this bit is
informational only and does not stop the DMA.
SIR<28>
When the receive DMA pointer associated with communication
port 1 reaches a page boundary, this bit is set and the DMA
disabled. To restart, clear this bit by writing 0; writing 1 has
no effect. Note that bit <29> is set whenever this bit is set.
SIR<27>
This interrupt is generated by the communication port 2
transmit DMA logic. The DMA transmitter, when enabled
transmits bytes until the pointer reaches a page boundary. At
this point it stops DMA and interrupts the processor. DMA is
disabled whenever this bit is set. Clear this bit by writing 0;
writing 1 has no effect. Clearing this bit may restart the DMA
if the DMA enable bit is still on.
SIR<26>
When a parity error, page crossing error, or maximum transfer
length error occurs during a communication transmit port
2 DMA, this bit is set and the DMA is disabled. The DMA
pointer will contain the error address. Check the memory
sections for more information. To restart, software must clear
this bit by writing 0; writing 1 has no effect.
SIR<25>
When the receive DMA pointer associated with communication
port 2 reaches a (2-Kbyte) half-page boundary, this bit is set.
Software must disable DMA, load a new pointer, and restart
DMA quickly. Clear this bit by writing 0. Writing 1 has no
effect. This bit will always be set when bit 24 is set. The value
of this bit is informational only and does not stop the DMA.

CPU and System Registers E–23

SIR<24>
When the receive DMA pointer associated with communication
port 2 reaches a page boundary, this bit is set and the DMA
disabled. To restart, clear this bit by writing 0; writing 1 has
no effect. Note that bit<25> is also set whenever this bit is set.
SIR<23:20>
These bits are reserved.
SIR<19>
This interrupt is set whenever the SCSI DMA buffer pointer
associated with the SCSI port is loaded into the SCSI DMA
pointer register. Software uses this interrupt to load a new
buffer pointer into the SCSI buffer pointer register. Clear this
interrupt by writing 0 to it.
SIR<18>
This bit is set when the buffer pointer is not reloaded soon
enough. It indicates an overrun condition as the data buffer
space is exhausted. DMA is disabled when this bit is set. Clear
this bit by writing 0 to it.
SIR<17>
This bit is set when the SCSI DMA encounters a memory read
error during a DMA. DMA is disabled when this bit is set.
Clear this bit by writing 0 to it.
SIR<16>
This bit is set to 1 when the LANCE DMA encounters a
memory read error, disabling DMA. The LANCE will then
enter a timeout state, interrupting the processor to handle the
problem. The address of the error will be visible in the LPR.
Clear this bit by writing 0 to it; writing 1 to it has no effect.
SIR<15>
This bit is reserved.

E–24 CPU and System Registers

SIR<14> UNSCUR
When this bit is set, the contents of the NV RAM in the TOY
clock chip are set to default system values. Any password that
had been saved is lost.
SIR<13> TCO 2 interrupt
This bit reflects the value of the TURBOchannel slot 2
interrupt.
SIR<12> TCO 1 interrupt
This bit reflects the value of the TURBOchannel slot 1
interrupt.
SIR<11> TCO 0 interrupt
This bit reflects the value of the TURBOchannel slot 0
interrupt.
SIR<10> NRMMOD
This bit reflects the state of the manufacturing jumper on the
module. When the jumper is absent, NRMMOD is 0, and the
console should perform its normal power up or reset tests and
boot. When the jumper is installed, NRMMOD is 1, and the
console will execute manufacturing tests.
SIR<9>
This bit follows the state of the interrupt from the 53C94 SCSI
controller chip. This interrupt indicates that the transfer is
complete.
SIR<8>
This bit follows the state of the interrupt from the LANCE.
SIR<7>
This interrupt is generated by SCC(1), which contains both the
communication port 2 (ch B.) and the keyboard port UART (ch
A.). Software must read SCC(1) internal registers to determine
the appropriate course of action. Communication port 2 is the
same as serial line 3.

CPU and System Registers E–25

SIR<6>
This interrupt is generated by SCC(0), which contains both the
communication port 1 (ch B.) and the mouse port UART (ch A.).
Software must read SCC(0) internal registers to determine the
appropriate course of action. Communication port 1 is the same
as serial line 2.
SIR<5>
This bit follows the state of the time-of-year clock interrupt.
SIR<4>
This bit follows the state of the power supply warning indicator.
When this bit is set, the operating system should report an
error. When the power supply overheats, this bit is set to 1.
SIR<3>
This bit is reserved.
SIR<2>
This bit indicates SCSI receive data in the FIFO of the 53C94
SCSI controller. When transfers are aligned and the DMA is
enabled, data is moved from the FIFO to main memory by the
I/O control ASIC, and this interrupt is masked by software.
Unaligned transfers cannot use DMA and thus cannot use
this interrupt to signal when the processor must move data to
memory.
SIR<1>
This bit reflects the state of the halt button on the back of the
system unit. This bit is set to 0 when the button is pushed.
This interrupt should always be masked.
SIR<0>
This bit reflects the state of the halt button on the back of the
system unit. This bit is set to 1 when the halt button is pushed.
On R3000A systems, this interrupt should always be masked.
The halt interrupt is also presented at the processor interface,
so it should be visible to the CPU.

E–26 CPU and System Registers

System Interrupt Mask Register
Table E-11. System Interrupt Mask Register 0xBF840120
Bits

Access

Description

31:0

R/W

Interrupt mask

<31:0>
These bits, if 0, mask the corresponding interrupt observable in
the SIR. Bit <0> masks SIR<0>, bit <1> masks ) SIR<1>, and
so on. The mask does not prevent an interrupt from showing
up in the SIR; it merely keeps the CPU from being interrupted.
The interrupt mask is set to 0’s on power up, masking all
interrupts. Software must be set to 1 for those interrupts that
it wants enabled.

CPU and System Registers E–27

Error Address Register (EAR)
The error address register (EAR) (address: 0xBFA40000) is the
primary error log register that records the physical address of
TC I/O timeouts, TC DMA overruns, and memory ECC errors.
The EA register is cleared by system reset or by a processor
write. When an error occurs, EA.VALID is set along with the
log bits. Table E-12 shows the format of the EA register during
reads.
Table E-12. Error Address Register 0xBFA40000
Base

Size

Name

31
30
29
28
27
0

1
1
1
1
1
27

VALID
CPU
WRITE
ECCERR
RSRVD
ADDRESS

EAR<31> - EA.VALID
This bit is set to 1 when error information is clocked into
the register. When EA.VALID is already set, error logging is
disabled. That is, the EA register indicates only the first error
that occurred if there are multiple errors.
EAR<30> - EA.CPU
If this bit is 1, the error occurred during a processor
transaction. If this bit is 0, the error occurred during a TC
DMA transaction.
EAR<29> - EA.WRITE
If this bit is 1, the error occurred on an I/O write or memory
write transaction. If this bit is 0, the error occurred on an I/O
read or memory read transaction.
EAR<28> - EA.ECCERR
If this bit is 1, an ECC error occurred. If this bit is 0, an I/O
timeout or DMA overrun occurred.

E–28 CPU and System Registers

EAR<27> - EA.RSRVD
This bit is reserved and stuck at 0.
EAR<26:0> - EA.ADDRESS
This field records the value of the pipelined address in effect at
the time the error occurred. For I/O transactions and partial
memory writes, this is the word address issued by the processor.
For DMA overrun errors, this is the word address of the last
valid word transferred (127). For processor and DMA memory
reads, this is the word address in the memory controller.
However, due to pipelining of the memory controller, the column
field of the word address has advanced five stages before
the ECC error status is available. Software must extract
ADDRESS[11:0], perform a signed subtract of five, and then
reinsert this value into ADDRESS[11:0] to recover the address
of the word that contained the ECC error. Table E-13 lists the
values of bits <30>, <29>, and <28> for the different types of
system errors. During read conflicts, the memory controller
may service the same read request several times (while stalling
the processor) until conflicting write data in the write buffer has
been flushed. It is possible for ECC read errors to occur during
processor read conflicts when the processor is stalled. However,
after the write buffer is flushed, the error is overwritten with
new data, so the processor will not receive a bus error on
termination of the read. Also, if the processor is waiting for
a memory space partial write to complete, and a multi bit
ECC error occurs during the read/modify/write of the partial
data, invalid data and valid ECC check bits will be loaded into
memory. In this case, the ensuing read will complete without
causing an exception even though the read data is invalid. If
the address is a cached location, invalid data will be loaded into
the cache and the cache entry will be incorrectly marked valid.
Regardless of the type of masked error, a memory interrupt will
be generated, and the offending ECC read error or processor
partial write error will be correctly logged in the EA and ES
registers.

CPU and System Registers E–29

Table E-13. EA Error Log Types
bit
<30>
CPU

bit
<29>
CPU

bit
<28>
CPU

Error Type

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1

DMA read overrun
DMA memory read ECC
DMA write overrun
Invalid combination
Processor I/O read timeout
Processor memory read ECC
Processor I/O write timeout
Processor partial memory write ECC

If the MB ASIC has prefetching enabled, it is possible to log
processor read hard ECC errors without a processor error if the
ECC error occurs in the prefetched portion of the cache block.

E–30 CPU and System Registers

Error Syndrome Register (ES)
The error syndrome (ES) register (address: 0xBFA80000) is a
slave error log register that records check bits and syndrome
bits of the last memory read. The ES register is frozen when
EA <31> is 1. The ES register is cleared by system reset and
processor writes.
Table E-14 shows the format of the ES register during reads.
The syndrome bytes are only valid if EA <31> is 1. The CHKHI
byte is only valid if the VLDHI bit <31> is set to 1. The
CHKLO byte is only valid if the VLDLO bit <15> is set to
1.
Table E-14. Error Syndrome Register 0xBFA80000
Base

Size

Name

31
24
23
16
15
8
7
0

1
7
1
7
1
7
1
7

VLDHI
CHKHI
SNGHI
SYNHI
VLDLO
CHKLO
SNGLO
SYNLO

ES<31> - ES.VLDHI
This bit is set to 1 whenever the CHKHI field <30:24> is
updated.
ES<30:24> - ES.CHKHI
In the absence of errors, this field records the last check bits
read from the high bank of memory (odd word). Once an error
occurs, and the EA.VALID bit EA <31> is set to 1, this field is
frozen.

CPU and System Registers E–31

ES <23> - ES.SNGHI
This bit records the single-versus-double bit error output of
the ECC logic at the time that an error was detected by the
high bank of memory. If it is 1, a single-bit error occurred. If
it is 0, a double-bit error occurred. This bit is valid when the
ES.SYNHI <22:16> field is valid.
ES<22:16> - ES.SYNHI
This field records the syndrome bits calculated by the ECC
logic at the time that an error was detected by the high bank of
memory (odd words). The EA.ADDRESS field (EA <26:0>) field
must be used to determine whether the error pertains to a low
or high word of memory. This field is undefined for low bank
errors. The syndrome can be used to determine which bit was
in error. See the next section, "ECC logic," for a description of
the syndrome logic.
ES<15> - ES.VLDLO
This bit is set to 1 whenever the CHKLO field <14:8> is
updated.
ES<14:8> - ES.CHKLO
In the absence of errors, this field records the last check bits
read from the low bank of memory (even word). Once an error
occurs, and the EA.VALID bit (EA<31>) is set to 1, this field is
frozen.
ES<7> - ES.SNGLO
This bit records the single-versus-double bit error output of
the ECC logic at the time that an error was detected by the
high bank of memory. If it is 1, a single-bit error occurred. If
it is 0, a double-bit error occurred. This bit is valid when the
ES.SYNLO <6:0> field is valid.

E–32 CPU and System Registers

ES<6:0> - ES.SYNLO
This field records the the syndrome bits calculated by the ECC
logic at the time that an error was detected by the low bank
of memory (even words). The EA.ADDRESS field (EA <26:0>)
field must be used to determine whether the error pertains to
a low or high word of memory. This field is undefined for high
bank errors. The syndrome can be used to determine which bit
was in error. See the next section, "ECC logic," for a description
of the syndrome logic.

CPU and System Registers E–33

Control Register (CS)
The control (CS) register (address: 0xBFAC0000) controls the
memory array size decoding via the CS.BNK32M bit <10>. The
CS register also controls the ECC data path. CS is a read/write
register that is cleared by system reset.
Table E-15 shows the format of the CS register during reads
and writes.
Table E-15. Control Register 0xBFAC0000
Base

Size

Name

16
15
14
13
11
10
7
0

16
1
1
1
2
1
3
7

RSRVD2
DIAGCHK
DIAGGEN
CORRECT
RSRVD1
BNK32M
RSRVD0
CHECK

CS<31:16> - CS.RSRVD2
This field must be written with zeros.
CS<15> - CS.DIAGCHK
This bit controls a diagnostic multiplexor in the ECC read data
path. If the CS.DIAGCHK bit <15> is 0, check bits from the
memory array card are used during memory reads. If the CS
DIAGCHK bit <15> is 1, the CS.CHECK field <6:0> specifies
the check bits during memory reads. Since CS is cleared by
system reset, check bits are read from memory by default.
CS<14> - CS.DIAGGEN
This bit controls a diagnostic multiplexor in the ECC write
data path. If the CS.DIAGGEN bit <14> is 0, check bits are
calculated from the processor or TC data word during memory
writes. If the CS DIAGGEN bit <14> is 1, the CS.CHECK field
<6:0> specifies the check bits during memory writes. Since

E–34 CPU and System Registers

CS is cleared by system reset, check bits are generated from
processor or TC data by default.
CS<13> - CS.CORRECT
This bit controls whether or not the ECC logic corrects singlebit errors in memory read data. When this bit is 1, the singlebit error in the read data is complemented as specified by the
ECC syndrome. When this bit is 1 and the ECC logic detects
a multi-bit error, the output of the ECC logic is undefined.
The state of this bit does not affect memory interrupts, error
logging, or bus errors; it only controls modification of memory
data. Since CS is cleared by system reset, ECC correction is
disabled by default.
CS<12:11> - CS.RSRVD1
This field must be written with zeroes.
CS<10> - CS.BNK32M
This bit controls the memory bank stride. If this bit is 0, the
stride is 8 Mbytes. If this bit is 1, the stride is 32 Mbytes.
Powerup/reset sets this bit and determines whether each
memory module is an 8- or 32-Mbyte module. Then, if no
32-Mbyte modules are found, this bit is cleared. Since CS is
cleared by system reset, the memory bank stride defaults to 8
Mbytes.
CS<9:7> - CS.RSRVD0
This field must be written with zeroes.
CS<6:0> - CS.CHECK
This field specifies the diagnostic check value used by the
CS.DIAGCHK and CS.DIAGGEN multiplexors.

CPU and System Registers E–35

ECC logic
This section describes the error correction code (ECC) logic.
MT generates seven check bits for each word written to the
memory arrays. For each word read from the memory arrays,
MT verifies that the check bits are consistent with the data
bits. If a single-bit error is detected, the erroneous bit is
automatically corrected if CS CORRECT (bit <>) is 1. If a
single- or double-bit error is detected, and EA.VALID (bit EA<>)
is 0, the EA and ES registers are written and frozen with the
address, check, and syndrome bits of the memory word.
Table E-16 lists the data bits included in the exclusive-or logic
for each check bit. The ES.CHKLO (ES <>), ES.CHKHI (ES
<>), and CS.CHECK (CS <>) fields correspond to:
64*C16 | 32*C8 | 16*C4 | 8*C1 | 2*C0 | CX
Table E-16. Participating Data Bits in Check Bit Calculation
Bit

Parity

CX
C0
C1
C2
C4
C8
C16
CX
C0
C1
C2
C4
C8
C16

even
even
odd
odd
even
even
even
even
even
odd
odd
even
even
even

0,4,6,7,8,9,11,14
0,1,2,4,6,8,10,12
0,3,4,7,9,10,13,15
0,1,5,6,7,11,12,13
2,3,4,5,6,7,14,15
8,9,10,11,12,14,15
0,1,2,3,4,5,6,7
17,18,19,21,26,28,29,31
16,17,18,20,22,24,26,28
16,19,20,23,25,26,29,31
16,17,21,22,23,27,28,29
18,19,20,21,22,23,30,31
24,25,26,27,28,29,30,31
24,25,26,27,28,29,30,31

Table E-17 lists the significance of each syndrome code logged
in the ES register. The multi-bit syndrome codes are shown for
completeness; MT does not report these as hard errors with the
assertion of either p.mc.~rErr or t.mo.~err as appropriate. MT
E–36 CPU and System Registers

only reports double-bit errors as hard errors. If the operating
system detects a multi-bit error syndrome code, it should log
the error and shut down immediately.
Table E-17. Syndrome Decoding
Syndrome Error

Syndrome Error

none

C16

double

multi

double

D24

double

multi

double

D25

double

multi

double

D10

multi

double

multi

double

D26

double

D27

double

D11

multi

double

D12

double

D17

double

D28

double

D13

multi

double

multi

double

D29

D16

double

multi

double

multi

double

D30

double

D14

multi

double

multi

double

D18

double

multi

double

D15

double

D19

double

D31

D20

double

multi

double

multi

double

multi

double

D21

double

multi

D22

double

multi

(continued on next page)

CPU and System Registers E–37

Table E-17 (Cont.). Syndrome Decoding
Syndrome Error

Syndrome Error

double

multi

double

D23

double

multi

double

multi

double

multi

double

multi

double

multi

E–38 CPU and System Registers

F
Connector Pin Assignments
This appendix lists pin assignments for the following
connectors:
SCSI cable connectors
Keyboard and mouse or tablet connectors
Serial communications connectors
ThickWire Ethernet connectors
Power supply connector
Modem loopback
Ethernet loopback
It also provides a summary of loopback connectors.

Connector Pin Assignments F–1

Table F-1. SCSI Cable Connector Pin Assignments
Pin

Signal

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

I/O
REQ
C/O
SEL
MSG
RST
ACK
BSY
GND
ATN
GND
RSVD
TERMPWR
RSVD
GND
GND
PARITY
DATA<7>
DATA<6>
DATA<5>
DATA<4>
DATA<3>
DATA<2>
DATA<1>
DATA<0>

25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
NC
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND

F–2 Connector Pin Assignments

Table F-2. Keyboard and Mouse or Tablet Connector Pin Assignments
Pin

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Source

Keyboard

Mouse
/Tablet

Signal

Description

GND
KEY.TX
KEY.RX
+12V
GND
MSE.RX

Ground
Keyboard transmitted data
Keyboard received data
Keyboard/tablet power
Ground
Mouse received data

MSE.TX
GND
GND
NC
NC
NC
+5V
–12V
GND

Mouse transmitted data
Ground
Ground

Mouse power
Mouse power
Ground

Connector Pin Assignments F–3

Table F-3. Serial Communications Connectors Pin Assignments
Pin

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

Source

Signal

CCITT1

EIA2

Description

CPU Module

GND
TX

102
103

AB
BA

Modem/printer

RX
RTS
CTS
DSR
GND
CD

104
105
106
107
102
109

BB
CA
CB
CC
AB
CF

Modem/printer

112

Modem/printer

TxCk
(DCE)

114

Signal ground
Modem transmitted
data
Modem received data
Request to send
Clear to send
Data set ready
Signal ground
Carrier detector
Unconnected
Unconnected
Unconnected
SPDMI
Unconnected
Unconnected
Modem transmit clock

Unconnected
Modem transmit clock

Modem/printer
CPU Module
Modem/printer
Modem/printer

Modem/printer

RxCk
(DEC)

115

CPU Module

DTR

108.2

Modem/printer
CPU Module

RI
SS

125
111

CE
CH

Unconnected
Unconnected
Data terminal ready
Unconnected
Ring indicator
DSRS
Unconnected
Unconnected

1 Comite Consultatif International Telegraphique et Telephonique, an international consultative
committee that sets international communications standards
2 Electronic Industries Association

F–4 Connector Pin Assignments

Table F-4. ThickWire Ethernet Connector Pin Assignments
Pin

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Source

XCVR
KNO3A-AA
XCVR
XCVR

XCVR
KNO3A-AA
XCVR
KNO3A-AA

Signal

Description

ACOL+
ATX+
GND
ARX+
GND
CTL+
GND
ACOL–
ATX–
GND
ARX–
+12V
GND
CTL–

Shield
Collision presence
Transmission
Ground
Reception
Power return
Control output
Ground
Collision presence
Transmission
Ground
Reception
Power
Ground
Control output

Table F-5. Power Supply Pin Assignments
Pin

Signal

Wire Gauge

1
2
3
4
5
6

+12 volt
Ground
–12 volt
Ground
POK
Warning

18
18
22
22
22
22

Connector Pin Assignments F–5

Table F-6. Modem Loopback Connector Pin Assignments
From
Pin No.

Signal

To
Pin No.

Signal

P4-2
P4-4
P4-6
P4-12
P4-18
P4-18
P4-18

TX2
RTS2
DSR2
SPDMI2
LLPBK2
LLPBK2
LLPBK2

P4-3
P4-5
P4-20
P4-23
P4-8
P4-22
P4-25

RX2
CTS2
DTR2
DSRS2
CI2
RI2
TMI2

Table F-7. Ethernet Loopback Connector Pin Assignments
From
Pin No.

Signal

To
Pin No.

Signal

Description

P6-3
P6-10
P6-13

TRA+
TRA–
PWR

P6-5
P6-12
P6-6

REC+
REC–
RET

Through capacitor
Through capacitor
Through resistor and LED

Table F-8. Summary of Loopback Connectors
Function

Communications
loopback connector
ThickWire loopback
connector
ThinWire T-connector
ThinWire terminator

F–6 Connector Pin Assignments

Standard/
Unique

Part Number

Option Number

Standard

12-15336-13

H3200

Standard

12-22196-02

N/A

Standard
Standard

12-25869-01
12-26318-01

H8223
H8225

Index
A
Adapter
serial line, 4–11
Adapter, serial line, 4–10
Additional memory, 1–14
Addresses, 9–16
hardware, 9–18
memory, 5–16, 9–17
NVRAM, 5–16
Alternate terminal, 3–1
settings, 3–1
Antistatic kit, 4–2
Autoboot, 2–4

B
BadVAddr register, E–13
Base system module, 5–2
clear-NVR connector, 5–2
CPU module, 5–9
CPU module connector, 5–2
diagnostic ROM, 5–2
ESAR, 5–7
ESAR chip, 5–2
Ethernet controller, 5–2
install, 5–6
keyboard-mouse connector, 5–2
option module connectors, 5–2
power connectors, 5–2

Base system module (cont’d)
RAM, 5–2
remove, 5–4
SCSI controller, 5–2
serial ports (RS-232), 5–2
SIMM connectors, 5–2
TURBOCHANNEL option module
connectors, 5–2
Base system module tests, D–6
Basic hardware, 1–4
Boot software, 2–8

C
Clear-NVR connector, 2–6, 5–2
Clear-NVR jumper, 2–6
cntl test, 10–9
Commands
?, C–7
boot, C–7
cat, 10–13, C–9
cnfg, 9–4, 9–5, C–10
cnfg 3, 9–6
d, C–19
e, 9–28, C–20
erl, C–21
go, C–21
init, C–22
ls, 10–12, C–22
passwd, 2–5, C–23

Index–1

Commands (cont’d)
printenv, C–24
restart, C–24
script, C–24
setenv, 3–2, C–25
sh, 10–11, C–27
t, 10–6, C–28
test, C–28
uerf, 9–20
unsetenv, C–29
Comm-line-to-MMJ adapter (see serial
line adapter), 4–11
Common tests, 10–9
Configuration
cnfg command, 9–5, 9–6
Configuration displays, 9–4
base system, C–12
color frame buffer, C–16
detailed, 9–6
2D graphics accelerator module,
C–17
3D graphics module, C–17
Ethernet controller, C–14
general, C–10
overview, 9–5, C–10
SCSI controller, C–15
Connector pin assignments, F–1 to F–6
Connectors, 1–8, 1–10
CPU module, 1–10
Ethernet, 1–8
internal, 1–10
keyboard-mouse, 1–8
power, 1–10
external, 1–8
RS-232, 1–8
SCSI, 1–8, 1–10
serial communications (See
Connectors, RS-232), 1–8
SIMM, 1–10
TURBOchannel option module, 1–10
external, 1–8
Console commands
key combinations, C–3

Index–2

Console exception messages, 9–14
Console mode, 2–2
full, 2–2
restricted, 2–2
Console prompt (>>), 2–2
Control key combinations, C–3
Control register, E–34
Controls and indicators, 1–6
CPU module, 1–13, 5–9
system boot rom, 1–13
CPU module connector, 5–2
CPU registers, E–2
CPU type utility, D–22

D
Data buffers, E–16
Diagnostic LEDs, 1–6
Diagnostic ROM, 5–2
Diagnostic status, E–10

E
ECC logic, E–36
equipment specifications
RZ23L hard disk drive, A–11
RZ24L hard disk drive, A–13
RZ25 hard disk drive, A–15
RZ26 hard disk drive, A–17
Equipment specifications
BA42 storage expansion box, A–10
LK401-AA keyboard, A–4 to A–5
RRD42 optical compact disc drive,
A–29
RX23 diskette drive, A–30 to A–31
RX33 diskette drive, A–32 to A–33
RZ58 SCSI hard disk drive, A–18 to
A–19
system unit, A–2 to A–3
TK50Z tape drive, A–20 to A–21
TLZ04 cassette tape drive, A–27
TLZ06 cassette tape drive, A–28
TZ30 tape drive, A–22 to A–23
TZ85 tape drive, A–24
TZK10 QIC tape drive, A–25 to A–26

Equipment specifications (cont’d)
VSXXX-AB tablet, A–8 to A–9
VSXXX-GA mouse, A–6 to A–7
Error address register, E–28
Error logs, 9–20
event types, 9–23
format, 9–20
memory, 9–24
Error messages, 9–9
console command, C–29
memory, 9–13
test, 9–9
Error syndrome register, E–31
ESAR, 5–4, 5–7, 5–28
base system, 5–7
ESAR chip, 5–2
option module, 5–28
Ethernet
base system ESAR, 5–7
option module ESAR, 5–28
Ethernet controller, 5–2
Ethernet loopback connector, 4–14
Ethernet station address register
(ESAR), 5–7, 5–28
?EV, C–29
?EVV, C–29
Exception messages, 9–14
Exception program counter register,
E–8
External loopback test, 10–10

F
Front cover plate, 4–5

H
Halt button, 1–6, 2–3, 2–4
Hardware
basi, 1–4
configurations, 1–2
Hardware physical addresses, 9–18

Individual tests, 10–8, D–2
Input devices, 7–1
keyboards, 7–2
LPFK, 7–6
mouse, 7–3
PFD, 7–6
tablet, 7–3
?IO, C–29

K
Keyboard, 1–16, B–8
Keyboard-mouse connector, 5–2
Keyboards, 7–2
KN03-GA, 5–9

L
LED
codes, 9–2
diagnostic, D–76
LED codes, D–76
LEDs
CPU, 5–9, 9–2
DCOK, 5–20, 9–2
diagnostic, 1–6, 9–2
power, 1–6, 5–20, 9–2
LEDs:CPU, 11–8
LEDs:DCOK, 11–8
LEDs:diagnostic, 11–8
LEDs:power, 11–8
Lighted programmable function
keyboard, 1–16
Loopback connector
Ethernet, 4–14
serial line, 4–15
ThickWire, 4–14
Loopback connectors, 4–10
LPFK, 7–6, B–8

M
Memory
additional, 1–14
address ranges, 5–16

Index–3

Memory (cont’d)
NVRAM, 1–14, 5–14, 5–19
SIMM, 1–14, 5–14
slots, 5–16
Memory addresses, 5–16, 9–17
Memory error logs, 9–24
Memory error messages, 9–13
Memory modules, 5–14
address ranges, 5–16
in cnfg displays, C–13
Memory slot numbers, 5–16
Memory slots, 5–14
Monitors, 1–15
Mouse, 1–16, 7–3, B–8
Multiscreen, 1–15

N
Name plate, 4–9
NVRAM module, 1–14, 5–14, 5–19

O
On/off switch, 1–6
Operating mode, 2–4
Option module
ESAR, 5–28
Option module connectors, 5–2
Option modules
remove and install, 5–26
Options, 1–12
Overheat, 11–36

P
Part numbers, B–1
adapters, B–10
basic system components, B–4
bezels, B–10
cables, B–9
connectors, B–10
cords, B–9
Ethernet, B–9, B–10
hardware documentation, B–12
input devices, B–8
internal drives, B–5

Index–4

Part numbers (cont’d)
keyboard, B–8
lighted programmable function
keyboard (LPFK), B–8
LPFK, B–8
major FRUs, B–4
monitors, B–7
mouse, B–8
PFD, B–8
power supply, B–4
programmable function dials (PFD),
B–8
SCSI, B–9, B–10
SCSI hardware, B–4
small hardware, B–10
software documentation, B–11
standoffs, B–10
system module, B–4
system unit chassis, B–4
system unit cover, B–4
tablet, B–8
terminators, B–10
passwd command, 2–5
Password, 2–5
change, 2–6
command, 2–5
erase, 2–6
remove, 2–6
set, 2–6
unknown, 2–6
?PDE3, C–29
PFD, 7–6, B–8
Pin assignments
Ethernet loopback connector, F–6
I/O cover SCSI cable, F–2
keyboard/mouse/tablet connector,
F–3
modem loopback connector, F–6
printer/communications connector,
F–4
printer/console loopback connector,
F–5
summary of loopback connections,
F–6

Pin assignments (cont’d)
ThickWire Ethernet connector, F–5
Pins test, 10–10
Pointing devices
LPFK, 1–16
mouse, 1–16
PFD, 1–16
tablet, 1–16
Power connectors, 5–2
Power indicator LED, 1–6
Power supply, 5–20
Power-up self-tests, 10–5
Power-up sequence, 11–8
Programmable function dials, 1–16

Q
Quick test script, 10–5

R
R>, 2–2
RAM, 5–2
Registers, 9–28, E–1
BadVAddr, E–13
cause, E–5
control, E–34
CPU, E–2
CS, E–34
data buffers, E–16
EAR, E–28
EPC, E–8
error address, E–28
error syndrome, E–31
ES, E–31
exception program counter, E–8
SIR, E–21
SSR, E–17
status, E–9
system, E–16
system interrupt, E–21
system interrupt mask, E–27
system support, E–17

S
Scripts
creating, 10–14
list, 10–12
quick test, 10–5
SCSI
cable lengths, 6–3
controllers, 1–17
drives, 1–17
ID, 6–2
requirements, 6–2
terminators, 6–2
SCSI chain terminator, 4–13
SCSI controller, 5–2
SCSI controller terminator, 4–12
SCSI terminators, 4–10
sdiag test, 10–9
Serial line adapter, 4–10, 4–11
Serial line loopback connector, 4–15
Serial number plate, 4–7
Serial ports (RS-232), 5–2
setenv command, 3–2
Shutdown software, 2–9
SIMM, 1–14, 5–14
SIMM addresses, 5–16
SIMM connectors, 5–2
SIMMs
remove and install, 5–18
Slot numbers, 9–16, 10–3
memory, 5–16
?SNF, C–29
Software
boot, 2–8
shutdown, 2–9
Speaker, 5–20
Static-sensitive materials, 4–2
Status register, E–9
?STF, C–29
?STX, C–29
System interrupt mask register, E–27
System interrupt register, E–21

Index–5

System module, 5–2
System software, 2–7
System support register, E–17
System unit cover, 4–4

T
Tablet, 1–16, 7–3, B–8
t command, 10–6
Terminal, 1–15
Terminator
SCSI chain, 4–13
SCSI controller, 4–12
Test error messages, 9–9
Tests
base system module, D–6
cache data, D–6
cache/data, D–6
cache/fill, D–8
cache/isol, D–10
cache isolate, D–10
cache/reload, D–12
cache/seg, D–14
cache segment, D–14
collision, D–29
common diagnostic utilities, D–30
cpu-type, D–22
CRC, D–31
cyclic redundancy code, D–31
DMA registers, D–33
DMA transfer, D–35
ecc/cor, D–16
ESAR, D–37
Ethernet, D–30
Ethernet DMA registers, D–33
Ethernet DMA transfer, D–35
external loopback, D–38
floating 1/0 memory, D–20
floating-point unit, D–17
fpu, D–17
halt button, D–23
individual, D–2
individual tests, 10–8
internal loopback, D–41

Index–6

Tests (cont’d)
IRQ, D–39
keyboard, D–24
LANCE, D–30
list of, 10–8
mem, D–19
mem/float10, D–20
mem/init, D–21
memory module, D–19
mem/select, D–21
misc/halt, D–23
misc/kbd, D–24
misc/mouse, D–26
misc/pstemp, D–27
misc/wbpart, D–27
mouse, D–26
multicast, D–43
ni/cllsn, D–29
ni/common, D–30
ni/crc, D–31
ni/dma1, D–33
ni/dma2, D–35
ni/esar, D–37
ni/ext-lb, D–38
ni/int, D–39
ni/int-lb, D–41
ni/m-cst, D–43
ni/promisc, D–45
ni/regs, D–47
NVR, D–52
overheat, D–27
partial write, D–27
power-up self-test, 10–2
prcache, D–49
prcache/arm, D–50
prcache/clear, D–51
prcache/unarm, D–51
promiscuous mode, D–45
RAM select lines, D–21
real-time, D–55
real-time clock period, D–53
real-time clock registers, D–54
registers, D–47
rtc/nvr, D–52

Tests (cont’d)
rtc/period, D–53
rtc/regs, D–54
rtc/time, D–55
scache/data, D–56
scc/access, D–57
scc/dma, D–57
scc/int, D–60
scc/io, D–61
scc/pins, D–63
SCC transmit-receive, D–66
scc/tx-rx, D–66
scsi/cntl, D–69
SCSI controller, D–69
scsi/sdiag, D–70
SCSI send diagnostics, D–70
scsi/target, D–71
send diagnostics, D–70
serial communication chip access,
D–57
serial communication chip direct
memory access, D–57
serial communication chip I/O, D–61
serial communication chip interrupts,
D–60
serial communication chip pins, D–63
subtests, 10–2
tlb/prb, D–74
TLB probe, D–74
tlb/reg, D–75
TLB registers, D–75
zero memory, D–21
Tests:
scache data, D–56
Tests:ecc correction, D–16
Test scripts, 10–2, 10–11
list, 10–12
?TFL, C–29
ThickWire loopback connector, 4–14
?TNF, C–29
Transmit and receive test, 10–10
Troubleshoot:console exception, 11–21

Troubleshooting
overview, 8–1
Troubleshooting:error message on
monitor, 11–19
Troubleshooting:Ethernet, 11–31
Troubleshooting:hardware missing from
cnfg display, 11–25
Troubleshooting:keyboard, 11–37
Troubleshooting:memory modules,
11–28
Troubleshooting:mouse, 11–37
Troubleshooting:no display, 11–17
Troubleshooting:no display with ULTRIX
running, 11–39
Troubleshooting:NVRAM module, 11–28
Troubleshooting:overheat, 11–36
Troubleshooting:power supply, 11–35
Troubleshooting:power-up self-test does
not complete, 11–8
Troubleshooting:SCSI, 11–29
Troubleshooting:serial communications,
11–33
Troubleshooting:SIMMs, 11–28
Troubleshooting:test error messages,
11–20
Troubleshooting:test exception messages,
11–19
Troubleshooting:ULTRIX error logs,
11–42
TURBOCHANNEL option module
connectors, 5–2
TURBOchannel option modules
remove and install, 5–26
?TXT, C–29

U
ULTRIX error logs, 2–4, 9–20
ULTRIX software, 2–7
Unknown password, 2–6
Utilities
display MOP counters, D–33
ni/ctrs, D–33

Index–7