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AZ-FI13A-MC

June 1986

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Document:	MicroPDP11 Systems Owners Manual Jun86
Order Number:	AZ-FI13A-MC
Revision:	0
Pages:	121
Original Filename:	AZ-FI13A-MC_MicroPDP11_Systems_Owners_Manual_Jun86.pdf

OCR Text

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AZ-FI13A-MC
(Formerly EK-MIC11-0M-002)
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MicroPDP-11
Systems
Owner's Manual

Prepared by Educational Services
of Digital Equipment Corporation

1st Edition, January 1985
2nd Edition, September 1985
3rd Edition, June 1986

The material in this manual is for informational purposes and is subject to change
without notice.
Digital Equipment Corporation assumes no responsibility for any errors that may
appear in this manual.

FCC Notice: 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 a commercial
environment. Operation of this equipment in a residential area may cause interference in which case, the user, at his own expense, may be required to take measures to correct the interference.
Printed in U.S.A.
The manuscript for this book was created on a VAX-ll/780 system and, via a
translation program, was automatically typeset by Digital's DECset Integated
Publishing System. The book was produced by Educational Services Development
and Publishing in Marlboro, MA.

The following are trademarks of Digital Equipment Corporation:

mamaDmD'"

COMPACTape
DEC
DECmate
DECUS
DECwriter
DIBOL

MASSBUS
MicroPDP-11
PDP
P/OS
Professional
Rainbow
RSTS

RSX
RT
UNIBUS
VAX
VMS
VT
Work Processor

Contents
Introduction
Chapter 1

Installation

INTRODUCTION ............................................................................................. 1-1
UNPACK THE SYSTEM UNIT ....................................................................... 1-2
PUT THE SYSTEM UNIT WHERE IT WILL BE USED............................... 1-3
LABEL THE PANEL AND DISKETTE DRIVE UNITS ................................. 1-4
UNPACK THE INSTALLATION GUIDE FOR THE FIRST TERMINAL
YOU WANT TO CONNECT TO THE SYSTEM UNIT .................................. 1-5
USE THE INSTALLATION GUIDE TO UNPACK AND INSTALL THE
CONSOLE TERMINAL .................................................................................... 1-5
PULL THE REAR COVER OFF THE SYSTEM UNIT .................................. 1-6
SET THE SPEED CONTROL KNOB FOR THE CONSOLE TERMINAL ...... 1-7
CONNECT THE CONSOLE TERMINAL CABLE TO THE CONSOLE
TERMINAL AND THE SYSTEM UNITS ....................................................... 1-8
INST ALL AND CONNECT ANY ADDITIONAL DEVICES ............................ 1-9
IDENTIFY THE POWER CABLE .................................................................... 1-10
CHECK THE VOLTAGE SWITCH SETTING ................................................. 1-11
SET THE POWER SWITCH TO O(OFF) ......................................................... 1-12
PLUG IN THE POWER CABLE ...................................................................... 1-12
SET THE POWER SWITCH TO 1(ON) ........................................................... 1-13
FIND THE USER TEST DISKETTE AND THE BLANK DISKETTE IN
THE LAST DISKETTE HOLDER IN THIS BOOK ......................................... 1-14
OPEN DRIVE 1 AND INSERT THE DISKETTE ........................................... 1-15
FIND THE USER TEST TAPE CARTRIDGE IN THE CARTRIDGE
HOLDER IN THIS BOOK ................................................................................ 1-16
PRESS THE READY BUTTON ON THE CONTROL PANEL ....................... 1-16
UNLOCK THE TK50 TAPE DRIVE AND INSERT THE TAPE
CARTRIDGE .................................................................................................... 1-17
PRESS THE RESTART BUTTON ON THE SYSTEM CONTROL PANEL ... 1-18
TYPE T AND PRESS THE RETURN KEy........................................ ............ 1-19

iii

Contents

REMOVE THE TAPE CARTRIDGE OR DISKETTE ..................................... 1-20
INSTALL YOUR SOFTWARE ......................................................................... 1-21
PREPARE YOUR OPERATING SySTEM ....................................................... 1-22

Chapter 2

Operation

INTRODUCTION ............................................................................................. 2-1
CONTROL PANEL ........................................................................................... 2-2
TK50 CONTROLS ............................................................................................ 2-4
SWITCHING THE SYSTEM ON ..................................................................... 2-6
POWER-UP SEQUENCE WITH SOFTWARE INSTALLED ........................... 2-7
POWER-UP SEQUENCE WITH NO SOFTWARE INSTALLED ..................... 2-8
RX50 DISKETTES ........................................................................................... 2-9
Write-Protecting a Diskette ......................................................................... 2-10
Diskette Handling and Storage Guidelines ................................................... 2-10
Diskette Handling ......................................................................................... 2-11
Inserting a Diskette ..................................................................................... 2-12
Backup Diskettes .......................................................................................... 2-12
TK50 TAPE CARTRIDGE ............................................................................... 2-14
Labeling a TK50 Tape Cartridge ................................................................. 2-15
Write-Protecting a Tape Cartridge .............................................................. 2-16
Care and Handling of Tape Cartridges ......................................................... 2-17
Inserting a Tape Cartridge ........................................................................... 2-18
Removing a Tape Cartridge ......................................................................... 2-20
Backup Tape Cartridges ............................................................................... 2-21

Chapter 3

Troubleshooting

INTRODUCTION ............................................................................................. 3-1
TESTING STRATEGY ..................................................................................... 3-2
EXAMPLE OF ISOLATING A PROBLEM ...................................................... 3-3
TROUBLESHOOTING TABLES ...................................................................... 3-4
MICROPDP-11j73 AND MICROPDP-11j83 HARDWARE-INITIATED
ERROR MESSAGES ......................................................................................... 3-9
MICROPDP-ll HARDWARE-INITIATED ERROR MESSAGES .................... 3-10
USER TEST ..................................................................................................... 3-12
User Test Diagnostics Menu ....................................................................... 3-12
Running the User Test ................................................................................ 3-14
Type T and Press the Return Key .............................................................. 3-15
Sample Error Message ................................................................................. 3-17

Contents

Chapter 4

Upgrade

Appendices
Appendix A
Appendix B
Appendix C
Appendix D

Installation/Conversion Procedures
System Specifications
Related Documentation
MicroPDP-11 Options

Glossary
Tables
2-1
2-2
2-3
2-4
3-1
3-2
3-3
B-1
B-2
C-1
C-2
D-1
D-2
D-3

MicroPDP-11 Controls and Indicators .................................................. 2-3
TK50 Tape Drive Controls .................................................................. 2-4
TK50 Tape Drive Indicators ................................................................ 2-5
Power-Up Problem Solutions ................................................................ 2-6
Basic Troubleshooting Procedure ......................................................... 3-5
MicroPDP-11/73 and MicroPDP-11/83 Hardware-Initiated Error
Messages .......................................................................................... 3-9
MicroPDP-11 Hardware-Initiated Error Messages .............................. 3-11
Electrical Requirements ....................................................................... B-3
Environmental Conditions ..................................................................... B-3
MicroPDP-11 Library ........................................................................... C-1
Diagnostic Software Documentation ..................................................... C-2
MicroPDP-11 Memory Options ............................................................ D-3
Communication Options ........................................................................ D-3
MicroPDP-11 Mass Storage Options .................................................... D-4

Introduction
This book describes how to install and operate MicroPDP-ll systems and what to
do if you should have a problem with your system.
This manual assumes the user has little or no previous computer experience. To
help new users, a glossary of common computing terms is included.
Detailed technical information is available in the MicroPDP-ll Systems Technical
Manual and in other related documents. Appendix C provides ordering information.
User responses are in color when they appear in examples of dialogue between the
user and the system.

vii

Installation
INTRODUCTION

To install your system correctly, you should follow the steps in order. If you need
help at any time, refer to Chapter 3, Troubleshooting, or call your service
representative.

1·1

Installation

UNPACK THE SYSTEM UNIT

If any items are damaged or missing:

• Contact your sales representative or store.
• Contact your delivery agent.
CAUTION
Do not pick up the system unit by its front and rear covers when
moving it.

TERMINAL CABLE

~ FLAT SCREWDRIVER
SYSTEM UNIT

2 LABEL SHEETS

000000000

DODOOO

OTHER ITEMS ARE NOT
NECESSARY FOR THIS
INSTALLATION PROCEDURE.

POWER CABLE

BOOK

DISKETTES

1-2

Installation

PUT THE SYSTEM UNIT WHERE IT WILL BE USED

• Allow space around the system for air circulation and servicing.
• Place the system away from heaters, photocopiers, and direct sunlight.
• Minimize static by placing the system away from busy office corridors.
• Keep the area free from dust and other abrasive materials.
• Keep food and liquid away from the system.
• Refer to Appendix B for more details.

NOTE
Prepare the optional desktop or rack mount systems. Follow the
instructions in Appendix A and continue with Step 3.

1-3

Installation

LABEL THE PANEL AND DISKETTE DRIVE UNITS

• Label the diskette drives 1 and 2.
• Make sure that all buttons on the control panel are out.
NOTE
If your system does not have a fixed disk drive, label the
diskette drives 0 and 1. Most systems have a fixed disk drive,
so this book will refer to the diskette drives as drive 1 and
drive 2.

1-4

Installation

UNPACK THE INSTALLATION GUIDE FOR THE FIRST TERMINAL YOU
WANT TO CONNECT TO THE SYSTEM UNIT

• The first terminal connected to your system unit is called the console terminal.

USE THE INSTALLATION GUIDE TO UNPACK AND INSTALL THE
CONSOLE TERMINAL

• If you have a VT100-series terminal, refer to page A-7 in Appendix A for its

installation instructions.

1-5

Installation

PULL THE REAR COVER OFF THE SYSTEM UNIT

• The cover is held in place with pop fasteners.

1-6

Installation

SET THE SPEED CONTROL KNOB FOR THE CONSOLE TERMINAL

• The speed of most of Digital's terminals is set to 4800 baud.

MicroPDP-ll/73

..... N+:oo

co -w
(0 (0

Wcnl\J~CDcnCD'(:'

rrrrrrri

.... O'lW .............. -..,JU1

g8gg:~o(]lO ~

-.JO)01../:>oWN--O

c
o

;;~W;:::;:::::O(oCD ~
.... (O-.J.;:.WNf\.}-"

(,OO':INooO'l../:>oOoo
!VOOOOOOQ

80000000

1-7

Installation

8 CONNECT THE CONSOLE TERMINAL CABLE TO THE CONSOLE
TERMINAL AND THE SYSTEM UNIT
VT240
VT220
(REAR VIEW)
(REAR VIEW)

r--------\

J6l1(;;t;;;'.1l
:
~

l _____ - - ---~Lr.---

1-8

VT100

(R~EAR
VIEW)
I

- - _____J

Installation

INSTALL AND CONNECT ANY ADDITIONAL DEVICES

• Additional devices may include terminals, printers, and modems. You may
connect them in any order.
• Refer to each device's installation guide for instructions.

1-9

Installation

IDENTIFY THE POWER CABLE

• Make sure the power cable's plug matches the wall outlet.

115 V

POWER CABLE

1-10

220 V /230 V/240 V

Installation

CHECK THE VOLTAGE SWITCH SETTING
CAUTION
An incorrect voltage setting can damage the system.

115 V
IN N. AMERICA THE
SWITCH IS SET TO
115 V

220 V /230 V /240 V
IN OTHER COUNTRIES
THE SWITCH IS SET
TO 230 V. IF NOT,
LOOSEN HOLD DOWN
SCREWS AND SLIDE
SWITCH TO 230 V.

HOLD DOWN
SCREWS

1-11

Installation

12
13

SET THE POWER SWITCH TO 0 (OFF)
PLUG IN THE POWER CABLE

• Thread all the cables through the lower cable guide.
• Replace the cover.

1-12

Installation

SET THE POWER SWITCH TO 1 (ON)

After a few moments, the system displays a message similar to the following.

KDF11 B·BE ROM VO.8

Testing in progress - Please v

128KW MEMORY
9 STEP MEMORY TEST
STEP 1 2 3 4 5 6 7 8 9
TOTAL MEMORY ERRORS =
CLOCK ENABLED

1 2 345 6 7 8 9
Waiting for media to be loaded, or driv

ERROR UNIT DU2
ERR 16 NOT BOOTABlE

Press the RETURN key when ready
ERROR UNIT DU1
ERR 16 NOT BOOTABlE
ERROR UNIT DUO
ERR 16 NOT BOOTABlE
WISH TO REBOOT [Y,(N))?

The system is now ready for testing.
The system contains either an RX50 diskette drive or a TK50 tape drive.

1-13

Installation

FIND THE USER TEST DISKETTE AND THE BLANK DISKETTE IN THE
LAST DISKETTE HOLDER IN THIS BOOK

• Use the diskette labeled "Micro-ll User TSTS #1".

WRITE PROTECT
NOTCH
JACKET

ORANGE _ _I ...
ARROW
PROTECTIVE
ENVELOPE

1-14

DISKETTE
SURFACE
DO NOT
TOUCH

Installation

OPEN DRIVE 1 AND INSERT THE DISKETTE

• Close the diskette drive door.

ALIGN THE ORANGE ARROW ON THE DISKETTE WITH
THE ORANGE STRIPE.

1-15

Installation

FIND THE USER TEST TAPE CARTRIDGE IN THE CARTRIDGE
HOLDER IN THIS BOOK

• Use the tape labeled "Micro-l1 User TSTS".

PRESS THE READY BUTTON ON THE CONTROL PANEL

• Pressing the Ready button places the fixed disk off-line and the green indicator
goes out.

~D~DD~D
Micro

PDP-II

R""

DC OK

Halt

Restart

~ ~
Filled Disk 0

W""p"""

1-16

---

PRESS TO SET
FIXED DISK OFF-LINE

Installation

UNLOCK THE TK50 TAPE DRIVE AND INSERT THE TAPE
CARTRIDGE*

• Unlock the tape drive by pushing the cartridge release handle to the left.
• Insert the tape cartridge completely into the tape drive. Make sure the arrow on
the tape cartridge faces left.
• Push the cartridge release handle to the right to lock the tape cartridge in place.
• Press the Load/Unload button on the tape drive.

* Refer to Chapter 2, Operation, Tables 2-2 and 2-3 and pages 2-18 through 2-20 for a
more detailed discussion of the TK50 tape drive's controls and procedures.

1-17

Installation

PRESS THE RESTART BUTTON ON THE SYSTEM CONTROL PANEL
~D~DD~D
Micro

PDP-II
"C"

I
0
LJCOK

~@}

PRESS TO RESET

f.--- THE SYSTEM

Fixed Disk 0
WfilePro\l!C\

Ready

[?J [?J

In a few moments, the system displays the User Diagnostics Menu.

USER DIAGNOSTICS MENU - V6.0 - PART 1
T - Test your System.
I - Identify System Devices.
F - Field Service Diagnostics Menu.
Type the letter then press the RETURN key. OR if you are
finished running diagnostics, remove the test media............

If you see any other message, go to Chapter 3, Troubleshooting, for help.

1-18

Installation

TYPE T AND PRESS THE RETURN KEY

Follow the directions displayed on the screen. If you are testing with a diskette,
these include inserting a blank diskette into drive 2.

In about 10 minutes, the system displays the following message.

,
YOUR SYSTEM HAS PASSED THE SYSTEM TEST.
To return to the User Diagnostics Menu, type U then
press the RETURN key, or if you are finished running
diagnostics, remove the test media. You may then turn
your system off or start the system software ............

If you see any other messages, go to Chapter 3, Troubleshooting, for help.

You have successfully installed and tested your system.
Return to the User Diagnostics Menu as shown on the screen.

1-19

Installation

REMOVE THE TAPE CARTRIDGE OR DISKETTE*

If you tested with a diskette, return it to its holder and go to Step 23.
If you tested with a tape, you must rewind and unload the tape before you
can remove the tape cartridge from the tape drive. Use the following procedure.

• Press the Load/Unload button to rewind and unload the tape. When the red
indicator light remains OFF, the rewind and unload process is completed.
• Push the cartridge release handle to the left and remove the tape cartridge.
• Store the tape cartridge in its holder in the back of the book.

* Refer to Chapter 2, Operation, Tables 2-2 and 2-3 and pages 2-18 through 2-20 for a
more detailed discussion of the TK50 tape drive's controls and procedures.

1·20

Installation

INSTALL YOUR SOFTWARE

Follow the instructions provided with your software.

1-21

Installation

PREPARE YOUR OPERATING SYSTEM

Perform a one-time system generation (SYSGEN) or configure (CON FIG) operation, if appropriate. Refer to your operating system documentation for information
and instructions.
These programs inform your operating system that legal devices are installed in
your computer upon which data may be written.
NOTE
Your operating system may not require a SYSGEN or CONFIG
operation.

1-22

Operation

INTRODUCTION

This chapter describes the controls and indicators of the computer and the TK50
tape drive, and what happens when you turn the system on.
The following is also provided for users unfamiliar with RX50 diskette drives and
diskettes, or with TK50 tape drives and tape cartridges.
• How to handle and store RX50 diskettes.
• How to use the RX50 diskette drive.
• How to handle and store TK50 tape cartridges.
• How to use the TK50 tape drive.

2-1

Operation

CONTROL PANEL

You control the system by using the On/Off switch and the Halt, Restart, WriteProtect, and Ready buttons.
~D~DDmD
Micro

PDP-II

I
0

R""

DeOK

Halt

Restart

~ @J
Filled Disk 0

Wr'teProtect

Readv

@J @J

Table 2-1 summarizes the operation of the control panel buttons and indicators.

2-2

Operation

Table 2-1
Controls and
Indicators

MicroPDP-ll Controls and Indicators
Position

Function

1
(lit - red)

Turns the system on.

Turns the system off.

Out

Out is the normal operating position.
The system may run only when the Halt
button is out.

In
(lit - red)

Stops the system. Press and release the Halt
button and type P to start the system.

Restart

Restarts the system as if the power switch
had just been turned on. Any work in
progress is lost. Press and release the Halt
button twice before restarting the system.

Fixed Disk 0
Write Protect

Out

Out is'the normal operating position. System
software is free to read and write information
on the disk.

In
(lit - yellow)

Prevents the system software from writing
on the fixed disk. You may write-protect
the fixed disk so that information is not
accidentally erased during diagnostic testing.
You may also write-protect the disk drive
when you copy the entire contents of the
fixed disk to diskettes as a backup.

Out
(lit - green)

The fixed disk is ready to be used for
information storage by the system software.

Disables the fixed disk. In effect, the fixed
disk is turned off.

Run

Lit

This indicator is lit (green) when the
processor is operating.

DC OK

Lit

This indicator is lit (green) when the power
supply is generating the correct dc voltages.

On/Off

Halt

Fixed Disk 0
Ready

2-3

Operation

TKSO CONTROLS

You control the TK50 tape drive by using the On/Off switch on the computer and
the Load/Unload button on the tape drive. Two indicators show the current operating status of the TK50 tape drive.

TAPE

SLOT

CARTRIDGE~
.

LOAD/UNLOAD
BUTTON AND RED
INDICATOR

l
I

CARTRIDGE
RELEASE LEVER

lilli'

Table 2-2 lists the function of the TK50 tape drive's controls. Table 2-3 lists the
operating conditions as indicated by the two indicators.
Table 2-2

TK50 Tape Drive Controls

Control

Position

Function

Loadl

Loads the tape (10-15 seconds).

Unload
button

H a tape is already in place when the power is
turned on, rewinding and loading can take up
to 2 minutes.
Cartridge
release
handle

Out

Rewinds and unloads the tape.

Lets you insert or remove a tape after rewind

and unload operations are completed.

Down

Locks tape in operating position.

NOTE
If a tape is already in place when the power is turned on,
rewinding and loading may take up to 2 minutes.

2-4

Operation

Table 2-3

TK50 Tape Drive Indicators

Red

Green

Condition

Off

No power to the tape drive.

Off

You may lift cartridge release handle; power
is present.

Off

Do not lift the cartridge release handle.
•
•
•
•

Power-up self-test is occurring.
Cartridge is inserted but handle is still up.
Tape is loading or unloading.
Tape is stopped.

Tape is successfully loaded.

Flashing

Tape is in motion (except rewind). Read/write
commands are being processed. Irregular fast
blinking means tape calibration is occurring. *

Flashing

1;'ape is rewinding.

Flashing
rapidly

Flashing

There is a fault. Press and release the
Load/Unload button four times. If the
problem persists, do not use the tape drive
and do not try to remove the tape cartridge.
Call your service representative.

* If tape is new, the system performs a calibration sequence that takes approximately two
minutes.

2-5

Operation
SWITCHING THE SYSTEM ON

When you turn the system on, the power-up sequence begins.
Table 2-4 describes the power-up sequence and what to do if there is a problem.
The figure shows how your system's control panel should look when everything is
working correctly.
.

Table 2-4

Power-Up Problem Solutions

Normal Sequence

Problem

Solution

On/Off switch is lit.

1/0 button not lit

Refer to Chapter 3,
Troubleshooting.

Run and DC OK
indicators are lit.

Run and DC OK
indicators are not lit.

Refer to Chapter 3,
Troubleshooting.

Halt button indicator
is not lit.

Halt button indicator
is lit.

Press and release the
Halt button.

Ready button indicator
lights after 30 seconds if
a fixed disk drive is
present.

Ready button indicator
does not light.

Press and release the
Ready button.

Red indicator on TK50
tape drive goes out after
two seconds. Green
indicator is lit.

Red indicator flashes
rapidly.

Press the Load/Unload
button four times. If the
problem persists, call your
service representative.

~DmDDmD
Micro

PDP-II

I
0

• •
0 0
0 [!]
R,o

DeOK

Halt

Restart

Fixed Disk 0

Write Protect

2-6

Ready

Operation
POWER-UP SEQUENCE WITH SOFTWARE INSTALLED

If software has been installed, the system displays a message similar to this:
MicroPDP-ll/73

MicroPDP-ll

128KW MEMORY
9 STEP MEMORY TE:
STEP 1 23456
TOTAL MEMORY ERR
CLOCK ENABLED

Loading USER Tests: V2
Please wait... ...... .

The terminal displays the numbers 1 through 9 slowly, indicating completion of
steps in the memory test. The system performs these tests each time you turn it
on or press the Restart button.
NOTE
The version number displayed on the screen may be different in
your system.

• The series of dots indicates the system is loading software. The first screen for
the software installed on your system appears in a few seconds.
• The system is now ready for use. Refer to your software documentation for
instructions.
• If the terminal displays a message different from the one shown here, there may
be a fault with the system. Refer to Chapter 3, Troubleshooting, for help.

2-7

Operation

POWER-UP SEQUENCE WITH NO SOFTWARE INSTALLED

If no software has been installed, the system displays a message similar to this:

,.
Testing in progress - Please wait

1 234 567 8 9
Waiting for media to be loaded, or drive to go ready
Press the RETURN key when ready to continue

You have two options:
1. You can install software. Follow the instructions provided with the software.

2. You can run the User Test. Refer to Chapter 1, Installation, Step 15.
If the terminal displays a message different from the one shown here, refer to

Chapter 3, Troubleshooting, for help.

2-8

Operation
RXSO DISKETTES

A diskette stores information magnetically, in much the same way that sound is
recorded on audio tape. A diskette stores roughly 150 typewritten pages. An indicator on each drive lights when the drive is reading or writing information on a
diskette.
• Information stored on a diskette may be erased and replaced.
• A diskette stores information only on one side. As you insert a diskette into a
diskette drive, make sure you align the orange arrow on the diskette with the
orange stripe on the drive.

ACTIVE DRIVE
LIGHTS

2-9

Operation

Write-Protecting a Diskette

To prevent the system from adding or changing information on a diskette. carefully
cover its write-protect notch with a self-adhesive foil tab. This procedure is known
as write-protecting the diskette.
Remove the write-protect tab when you want to add or change information on the
diskette.

oJ! WRITEPROTECT
TAB

fil I
Diskette Handling and Storage Guidelines

• Never touch the exposed surfaces of the diskette.
• Do not bend or fold a diskette.
• Write the label before applying it to the diskette. Writing the label on the
diskette may crease the jacket.
• Always return a diskette to its protective envelope to keep out dust and dirt.
• Always store diskettes vertically and loosely to prevent their jackets from
warpmg.
• Keep diskettes away from direct sunlight. heaters. and other sources of heat.
• Keep diskettes away from magnets and equipment that generates magnetic
fields. such as motors, transformers. and terminals.
• Always handle diskettes gently.

2-10

Operation

Diskette Handling

The diskette rotates inside its jacket. It is continuously cleaned by the soft fabric
lining within.

NOTE
Use only formatted RXSOK diskettes, available from Digital or its
licensed distributors.

DISKETTE _ _~

WRITE PROTECT
NOTCH

JACKET
DISKETTE
SURFACE
DO NOT
TOUCH

PROTECTIVE
ENVELOPE

2-11

Operation

Inserting a Diskette

• Open the diskette drive door by pressing on its outer edge.
• Align the orange arrow on the diskette with the orange stripe on the drive and
insert the diskette.
• After inserting the diskette. press the diskette drive door to close it.
• Make sure the drive door is fully closed. The drive does not work with the door
open.
• Do not open the drive doors when the drive indicators are lit. Information could
be lost.
• Always return diskettes to their protective envelopes when you are through
using them. Tiny particles of dirt or dust can cause errors in reading or writing
data.
• Make and keep backup copies of all working diskettes. Refer to your software
documentation for instructions.
Backup Diskettes

Backup diskettes are duplicates of the information stored in your disk drive(s).
They provide insurance against accidental loss of your information.
• Make backup copies on diskettes or magnetic tape.
• Make a daily backup copy of all information you have changed or created.
• Make a weekly backup copy of all information stored on your fixed disk drive.
• Store all backup copies in a safe place.
• Keep an extra copy of each backup diskette.
• Refer to your software documentation for instructions.

2-12

Operation

ALIGN THE ORANGE ARROW ON THE DISKETTE WITH
THE ORANGE STRIPE.

2-13

Operation

TK50 TAPE CARTRIDGE

The TK50 tape drive holds one removable magnetic tape cartridge.
• The TK50 tape cartridge stores information magnetically in the same way sound
is recorded on an audio cassette.
• Each tape cartridge stores up to 94 million characters - the equivalent amount
of information that can be stored on 232 RX50 diskettes.
• Information stored on a tape can be erased and replaced.
• A TK50 tape cartridge stores information on only one side. You must insert the
tape cartridge correctly. Make sure the arrow on the tape cartridge faces left.

2-14

Operation

Labeling a TK50 Tape Cartridge

• Insert the label into the slot on the front of the tape cartridge.
• Never apply adhesive labels to the top, bottom, or sides of the tape cartridge.
• Never write on the tape cartridge with a pen or pencil.

LABEL

2-15

Operation
Write-Protecting a Tape Cartridge

Write-protecting a tape cartridge prevents accidental overwriting of information
stored on the tape.
• Slide the write-protect switch to the left to write-protect the tape.
• Slide the write-protect switch to the right when you want to add or change
information on the tape.

•

->I.

_-11

2-16

NOTWRITEPROTECTED
WRITEPROTECTED

Operation

Care and Handling of Tape Cartridges

• Allow a new, prerecorded tape cartridge to stabilize for 24 hours at room
temperature before using it.
• Store cartridges in a dust-free environment.
• Store at an even temperature between 10°C-40°C (50°F-104°F).
• Keep cartridges away from heaters, photocopiers, and direct sunlight.
• Keep cartridges away from magnets and equipment that generates magnetic
fields, such as motors and transformers.
• Keep cartridges away from terminals and X-ray equipment.
• Always handle tape cartridges gently.
NOTE
Use only TK50 COMPACTapes available from Digital or its
licensed distributors.

MAKE SURE
ARROW
FACES --+-~~U
LEFT

TAPE RELEASE SPRING
DO NOT TOUCH

2-17

Operation
Inserting a Tape Cartridge

• Make sure the Load/Unload button is out.
• Set the system's On/Off switch to 1 (ON).
- The TK50 red indicator is ON during the tape drive power-up self-test
(approximately two seconds).
- The red indicator goes OFF and the green indicator goes ON.
• Push the cartridge release handle to the left.
• Fully insert the tape cartridge into the tape drive. Make sure the arrow on the
tape cartridge faces left. When the tape cartridge is correctly seated, it locks in
place.
- The red indicator goes ON.
- The green indicator goes OFF.
• Push the cartridge release handle to the right to engage the drive's gears.
- The red indicator goes OFF.
- The green indicator goes ON.
• Push in the Load/Unload button.
- The red indicator goes ON.
- The green indicator goes OFF.
• The tape loads in 10-15 seconds to the beginning of tape (BOT)*. A mechanism
inside the drive picks up the tape and places it on a take-up reel within the
drive.
- The red indicator remains ON.
- The green indicator goes ON.

* If tape is new, the system performs a calibration sequence that takes approximately
two minutes. The green indicator blinks rapidly and irregularly during calibration.

2-18

Operation

CAUTION
If the red indicator flashes rapidly at any time, press and
release the Load/Unload button four times. If the problem persists, do not attempt to use the tape drive or remove the tape
cartridge. Call your service representative.

2-19

Operation

Removing a Tape Cartridge

You must unload a tape (includes rewinding and uncoupling) before you can
remove the cartridge from the tape drive. Use the following procedure.
1. Press the LoadlUnload button to the out (unload) position.

The red and green lights flash slowly, but not in unison, as the tape
rewinds to the beginning of the tape. This may take up to 90 seconds.
The red light remains on and the green light goes off, as the tape unloads
into the cartridge.
When the tape is completely unloaded, the red light goes off and the green
light comes on.
2. Pull the cartridge release handle up.
NOTE
Rewinding a tape can also be done under software control. Refer to
your software manual for Information.

3. Remove the tape cartridge and store it in a safe place.
4. Push the cartridge release handle down.
The green light remains on showing that there is power to the drive and
that you can safely move the cartridge release handle.
CAUTION
Always remove the tape cartridge from the tape drive when the
cartridge Is not In use or before you turn off the system. Failure to
remove the cartridge may result In damage to the tape cartridge.

2-20

Operation
Backup Tape Cartridges

A TK50 tape is an ideal medium for storing backup copies of files created on your
diskette or fixed disk drives. Refer to your software documentation for instructions
to perform a backup or file copy operation.
• Make a daily backup copy of all information you have changed or created.
• Make a weekly backup copy of all information stored on your fixed disk drive.
• Store all backup copies in a safe place.
NOTE
Write-protect diskettes and fixed disk drives when making
backup copies onto tape to prevent accidental loss of
information.

2-21

Troubleshooting
INTRODUCTION

Troubleshooting is the process of isolating and repairing minor problems. The
MicroPDP-ll system's power-up test checks the system's internal circuitry.
From time to time you may encounter a problem that is not related to the system's
diagnostic tests. For your convenience, Table 3-1 provides a basic troubleshooting
checklist of some of these problems, their possible causes, and ways to correct
them.
The User and Field Service test diskettes provide extended testing of the circuitry
and check the devices installed on the system.

3-1

Trou bleshooting

TESTING STRATEGY

A power-up test runs every time you turn the computer on. This test checks the
internal circuitry of the system. It also checks for the presence of software on the
system. If the test determines that no software is present, it displays a message on
the screen. See "Example of Isolating a Problem" on the next page.
If the test finds an error, it displays what is called a "hardware-initiated error"

message on the screen. Table 3-2 lists MicroPDP-ll/73 and MicroPDP-ll/83
error messages, their possible causes, and ways to correct them. Table 3-3 lists
MicroPDP-ll error messages, their possible causes, and ways to correct them.
The User Test isolates and identifies faults in the system. Use this test either in
response to an error message or to periodically test your system. The User Test
Diagnostics Menu is described on page 3-12. The method of running the User
Tests, sample screens, and an example of an error message follows the description
of the User Test Diagnostics Menu.

3-2

Troubleshooting
EXAMPLE OF ISOLATING A PROBLEM

The following error message appears for one of these reasons:
• Software is not present.
• A bootable diskette is not present, and
• The Return key has been pressed repeatedly.

,
Testing in progress - Please wait

1 2 345 6 7 8 9
Waiting for media to be loaded, or drive to go ready
Press the RETURN key when ready to continue

• Insert the User Test diskette into drive 1.
• Press the Restart button.
The system performs its self-test and loads the User Test diagnostics.

3-3

Troubleshooting

TROUBLESHOOTING TABLES

The corrective procedures listed in Table 3-1 are for minor problems.
It is sometimes necessary to replace a faulty component. The MicroPDP-ll
Systems Technical Manual describes how to replace a number of them.
NOTE
Major repairs should be carried out only by qualified
Field Service personnel.

If you have a problem, first try to identify and solve the problem. Use the
information in this section. Then, if necessary, refer to the MicroPDP-ll Systems
Technical Manual.
If you are not able to correct the problem, call your service representative.

3-4

Troubleshooting

Table 3-1

Basic Troubleshooting Procedure

Problem

Possible Cause

Corrective Action

No response when
the power switch
is turned on.
(Switch is not lit.)

The system is
not plugged in.

Plug the system in.

There is no power
at the wall outlet.

Try using a different wall outlet.

The system circuit
breaker is tripped.

Reset the circuit breaker by pressing
it in. (The circuit breaker is shown on
the previous page.) If it trips again,
your system needs repair. Call your
service representative.

The power cable
is incorrectly
installed.

Check that the cable is fully seated
into its socket at the rear of the
system unit and the wall outlet.

The Halt button is
pressed in (lit).

Press and release the Halt button;
it should not be lit.

The console terminal
is turned off.

Turn the terminal on.

The console terminal
is off-line.

Put the terminal on-line. Refer to the
terminal's documentation.

The console terminal
cable is not installed
correctly.

Make sure the cable is installed
properly at both ends.

Power is on
but there is no
response from the
system. (Switch
is lit.)

The baud rate
Make sure the baud rate settings are
settings of the system the same. Refer to Chapter 1,
and the terminal do
Installation, Step 7.
not match.
System does not
start from the
TK50 tape drive.

The Halt button on
the control panel is
pressed in.

Press and release the Halt button;
it should not be lit.

3-5

Troubleshooting
Table 3-1

Basic Troubleshooting Procedure (Cont.)

Problem

Possible Cause

Corrective Action

System does not
start from the
fixed disk drive.

The Ready button
is pressed in.

Press and release the Ready button;
it should be out and its indicator lit.

There is no software
on the fixed disk.

Load your software onto the fixed
disk drive. Follow your software
instructions.

There is no diskette
in the drive.

Insert a diskette into the drive and
close the door.

The drive door is
not closed.

Close the diskette drive door.

The diskette is
upside down.

Check that the orange arrow on the
diskette aligns with the orange stripe
on the drive.

The diskette is not
the correct kind.

Use a bootable system diskette.

The diskette is worn.

Try another diskette.

System does not
start from the
diskette drive.

TK50 tape drive
passes the powerup test but does
not work.

Tape cartridge not
Insert a tape cartridge and press the
present or not loaded. Load/Unload button to load the tape.

The controller module Call your service representative or run
may be faulty.
the Field Service Diagnostic Tests.
TK50 red indicator Possible problem with Press and release the TK50
flashes rapidly.
the tape drive.
Load/Unload button four times. If
the problem persists, stop the
operation of the tape drive and call
your service representative.
Tape cartridge
release handle
does not lift.

3-6

Power-up test still
in process.

Wait for the red indicator to go out
and try again. If the problem persists,
there may be a mechanical problem;
call your service representative.

Troubleshooting
Table 3-1

Basic Troubleshooting Procedure (Cont.)

Problem

Possible Cause

Corrective Action

Tape cartridge
release handle
does not lock.

Tape is not seated
properly.

Reinsert the tape cartridge. If the
problem persists, there may be a
mechanical problem; call your service
representative.

Tape does not
unload.

Load/Unload button
is in Load position.

Make sure the Load/Unload button
is in the Unload position. Wait for
the red indicator to go out before
removing the tape cartridge.

Not configured
or illegal device
name message.

Operating system
does not detect a
TK50 tape drive.

Perform a SYSGEN or CONFIG
operation. See Chapter 1, Installation,
Step 24, or call your service
representative.

Fixed disk read
error message.

The Ready button
is pressed in.

Press and release the Ready button.
The button should be out and its
indicator lit.

Fixed disk write
error message.

The Ready button is
pressed in.

Press and release the Ready button.
The button should be out and its
indicator lit.

The disk is writeprotected.

Press and release the Write-Protect
button. Its indicator should not be lit.

Diskette drive read There is no diskette
error message.
in the drive.

Insert a diskette into the drive and
close the door.

The drive door is
not closed.

Close the diskette drive door.

The diskette is
upside down.

Check that the orange arrow on the
diskette aligns with the orange stripe
on the drive.

Use preformatted RX50K diskettes
The diskette is
incorrectly formatted. from Digital.
The diskette is
worn out.

Try another diskette.

3-7

Troubleshooting

Table 3-1

Basic Troubleshooting Procedure (Cont.)

Problem

Possible Cause

Corrective Action

Diskette drive
write error
message.

There is no diskette
in the drive.

Insert a diskette into the drive and
close the door.

The drive door is
not closed.

Close the diskette drive door.

The diskette is
upside down.

Check that the orange arrow on the
diskette aligns with the orange stripe
on the drive.

The diskette is
write-protected.

Use a blank diskette or remove the
write-protect tab.

The diskette is full.

Use another diskette.

Use preformatted RX50K diskettes
The diskette is
incorrectly formatted. from Digital.
The diskette is
worn out.

Try another diskette.

The drive door is
not closed.

Insert the diskette into the drive and
close the door.

The diskette is
upside down.

Check that the orange arrow on the
diskette aligns with the orange stripe
on the drive.

The diskette is
damaged.

Try another copy of the diskette.

Tape read error
message.

The tape cartridge
may be faulty.

Try starting the tape again. If the
problem persists, try another tape
cartridge.

Tape write error
message.

The tape is writeprotected.

Slide the write-protect switch on the
tape cartridge to the right. If the
problem persists, try another tape
cartridge.

The User Test
diskette does
not run.

3·8

Troubleshooting
MICROPDP-11/73 and MICROPDP-11/83 HARDWARE-INITIATED ERROR
MESSAGES

If you have a MicroPDP-11 system, see page 3-10.
When you turn your MicroPDP-11/73 or MicroPDP-11/83 system on, it may
display one or more messages on the terminal. The system hardware generates
these messages, and, in most cases, they indicate faults in the system. Table 3-2
lists the possible messages and how to respond to them. If you need help at any
time, refer to the MicroPDP-ll Systems Technical Manual or call your service
representative.
Table 3-2

MicroPDP-ll/73 and MicroPDP-ll/83 Hardware-Initiated
Error Messages

Error Number

Error Title

Corrective Action

1,2,3

Boot is in progress. Wait for boot to
complete.

Waiting for user to select a boot device.
Choose a device.

5, 6

The system is inoperative. Call your service
representative.

BOOT ERROR

The automatic boot sequence failed to find a
device that could boot. Press the Return
key to list the boot error messages.

DRIVE NOT
READY

Check that there is a diskette in the drive
and the drive door is closed.
Release the Ready button; its indicator
should be lit.

NON BOOTABLE Try another diskette.
MEDIA IN THE
DRIVE

NO DISK
PRESENT OR
DRIVE IS NOT
LOADED

Insert a diskette into the drive and close the
drive door.

3-9

Troubleshooting

Table 3-2

MicroPDP-ll/73 and MicroPDP-ll/83 Hardware-Initiated
Error Messages (Cont.)

Error Number

Error Title

Corrective Action

NO TAPE
PRESENT

Install a tape cartridge in the tape drive.

NON-EXISTENT
CONTROLLER

Make sure you have typed the disk unit
number correctly.
Press the Restart button to restart the
system. If the error persists, refer to the
MicroPDP-ll Systems Technical Manual,
which explains how to select an alternate
drive.

NON-EXISTENT
DRIVE

Make sure you have typed the device name
correctly.

INVALID UNIT
NUMBER

Select a different disk drive unit number.

INVALID DEVICE Choose a different device.

CONTROLLER
ERROR

Call your service representative.

DRIVE ERROR

Check the diskette drive. Make sure the
diskette is properly inserted.
Press the Ready button; its indicator should
be lit.

22-76
77

Call your service representative.
CPU HUNG

Release the Halt button. If the error
persists, call your service representative.

MICROPDP-11 HARDWARE-INITIATED ERROR MESSAGES

When you turn the MicroPDP-ll system on, it may display one or more messages
on the terminal. The system hardware generates these messages, and, in most
cases, they indicate faults in the system. Table 3-3 lists the possible messages and
how to respond to them. If you need help at any time, refer to the MicroPDP-ll
Systems Technical Manual or call your service representative.

3-10

Troubleshooting

Table 3-3

MicroPDP-ll Hardware-Initiated Error Messages

Error Number

Error Title

Corrective Action
Your system is inoperative. Call your
service representative.

1-11

NON-EXISTENT
CONTROLLER

Press the Restart button to restart the
system. If this message persists, refer to
your technical manual, which explains how
to select an alternate drive.

DRIVE NOT
READY

Make sure a diskette is in the drive.

DRIVE ERROR

Check the diskette drive. Make sure the
diskette is properly inserted.

CONTROLLER
ERROR

Call your service representative.

NOT BOOTABLE

Install software or run the User Test.
Try a different diskette.

NO DISK

Insert a diskette in the disk drive.
Close the diskette drive door.
The diskette may be upside down. Check
that the orange arrow on the diskette
matches with the orange stripe on the drive.

NO TAPE

Install a tape cartridge in the tape drive.

NON-EXISTENT
UNIT

Press the Restart button to the system.
Make sure you type in the correct device
name.

20-23

Your system is inoperative. Call your
service representative.

3-11

Troubleshooting

USER TEST

The User Test diagnostics program isolates and identifies faults in the system.
You can run the User Test either in response to a message or to periodically test
your system.
You must use the console terminal to run the tests. The tests are stored on two
diskettes and are supplied with your system.
NOTE
There are several diskettes labeled Field Service Tests. These
tests require extensive knowledge of the XXDP+ software and
are to be used only by Field Service technicians. Refer to the
MicroPDP-11 Systems Technical Manua/for more details.
User Diagnostics Menu

The User Diagnostics Menu lists the options available to you when you run the
User Tests:

3-12

Troubleshooting

Runs a quick test of all devices known to be attached to the system. If the
test detects an error, the system tells you where the fault lies.

Causes the system to display a list of all of the devices known to be on the
system. This list includes the components of the basic system only. To return
to the User Diagnostics Menu, hold down the CTRL key and press C.

In most cases, <CTRL/C> cancels the present operation, and returns you to
the User Diagnostics Menu.
F

Causes the system to display the Field Service Diagnostic Menu. This option
is for your service representative only.

If you select an option by mistake:

• Press the U key to return to the User Diagnostics Menu.
• If this does not work, press the Restart button on the control panel. This
cancels the test and returns you to the condition as though you had just set the
power switch to 1 (ON).
If you type something the system does not recognize as a command, it displays:

• A question mark, or
• A message explaining that you must type a single letter followed by the Return
key.

3-13

Troubleshooting

Running the User Test

You can run the User Test in response to most messages.
To run the tests:
• Insert a copy of User Test #1 into diskette drive 1.
• Press the Restart button.
• The system displays a message similar to the following.
BOOTING DU1

Loading USER Tests: V6.00 this will take a few seconds.
Please wait.. .......... ..

• Mter a few seconds, the system displays the User Diagnostics Menu.

USER DIAGNOSTICS MENU - VS.O - PART 1
T - Test your System.
I - Identify System Devices.
F - Field Service Diagnostics Menu.
Type the letter then press the RETU RN key. OR if you are
finished running diagnostics, remove the test media........... .

The version number on your screen may be different.
If this message does not appear, try using the second copy of User Test #1. If this

does not work, refer to Tables 3-1 through 3-3 for help.

3-14

Troubleshooting

Type T and Press the Return Key

Follow the directions on the screen. These include inserting a blank diskette into
drive 2. If you have additional RX50 diskette drives in your system, insert blank
diskettes into these drives also.

The system displays the following message.

SYSTEM TEST DIRECTIONS.
This is a test of all system devices identified by the
diagnostic.
Install blank diskettes in other diskette drives to be
tested. Make sure the orange arrow on the diskette is
aligned with the orange stripe on the drive.
Make sure Write Protect for the Fixed Disk is turned off
(write protect indicator is not lit). Data stored on the
fixed disk will not be harmed.
NOTE: During one of the tests, a pattern of characters
will appear on other terminals connected to the system
this is normal.
Press the RETURN key to begin the test, OR to return to the
User Diagnostics Menu, type U then press the RETURN key .....

3-15

Troubleshooting

The system confirms the test is running:

SYSTEM TEST IN PROGRESS.
The test will take about 10 minutes. Results will be
reported at the end of the test. Angle brackets and
stars will be printed to indicated testing is in progress.
To halt the test at any time and return to the User
Diagnostics Menu, type 0 C by holding down the CTRL key
and pressing the C key.
IDENTIFICATION OF SYSTEM DEVICES.
The System Test will test the Processor, Memory and Line
Clock. Additional Devices that have been detected and
will be tested are:
DEVICE
Removable Disks (RX50)
Fixed Disk (RD52)
4-Port Interface (DZV11)

QUANTITY

2
1
1

NOTE
The list of devices to be tested may be different from the one
shown above.

Chapter 1, Installation, outlines the conclusion of a successful test. The following
section explains what you see if the system detects a fault.

3-16

Troubleshooting

Sample Error Message

If the system detects an error, the test halts and displays a message similar to the
following.
ERROR DETECTED IN SYSTEM TEST

The system instructs you to insert User Test #2. Follow the directions displayed
on your screen.
The test then lists each component in turn, the time taken to test each component,
and the result of the test.
The following example shows that the test detected a fault in the removable disks
and controller.
NOTE
The list of devices to be tested may be different from the one
shown below.

Device tests will now be run to determine the cause of the
error.

DEVICE

MAXIMUM RUN
TIME(MIN.)

RESULTS

Processor ......................... 0.5 .................... OK
Memory ........................... 7.0 .................... OK
DZVll 4-Port Interface Test #1 ... 0.5 .................... OK
DZVll 4·Port Interface Test #2 ... 2.0 .................... OK
Fixed Disk & Controller ............ 1.0 .................... OK
Removable Disks & Controller ..... 5.0 .................... ERROR
DEQNA Ethernet-Qbus Adapter ... 1.0 .................... OK
Your system has an error as indicated above. Check the
Troubleshooting chapter of the Owner's Manual on how to
proceed, or call your Field Service Representative. OR. ..
To return to the User Diagnostic Menu,
type U then press the RETURN key .......... ..

3-17

Troubleshooting
At this point, you may:
• Check for any problems listed in Tables 3-1 through 3-3.
• Type U and press the Return key to return to the User Diagnostics Menu #2
and rerun the test.
• Go to the User Diagnostics Menu #1. To do this, remove User Test #2 and
insert User Test #1. Type U and press the Return key to go to the User
Diagnostics Menu #1.
If the message persists when you retry the test:

• Call your service representative, or
• Run the hardware-initiated diagnostics to further test the system, as explained in
the MicroPDP-ll Systems Technical Manual.
NOTE
It is not recommended you run the hardware-initiated tests or
Field Service tests unless you are a trained Field Service
technician.

3-18

Upgrade
As you upgrade your system, insert your documentation here for future reference.

4-1

Appendix A
Installation/ Conversion Procedures
INTRODUCTION

This section shows you how to do the following.
• Convert a floor stand system to a desktop system.
• Prepare a rack mount unit.
• Install any VT100-series video terminal and set the baud rate.

A-1

Installation/Conversion Procedures

DESKTOP CONVERSION

Remove the Front and Rear Covers.

• Install the four rubber feet on the right side of the system.

2 Remove the Four Screws at the Base of the System as Shown.

A-2

Installation/Conversion Procedures

Place the System Unit on a Table.
WARNING
You need two people to do this since the system weighs
30 kg (65 Ibs).

FOOT
STAND

Replace the Front and Rear Covers.

• Return to Step 4 of Chapter 1, Installation.

A-3

Installation/Conversion Procedures

PREPARING A RACK MOUNT MODEL

Check the Contents of your Rack Mounting Kit.

If any item is missing or damaged:

• Contact your salesperson or distributor.
• Contact your delivery agent.
If you need help, call your service representative.

WARNING
You need two people for this procedure since the rack mount
system weighs 27 kg (60 Ibs).

CO
•

(1 )

ca ~.
I

•

(1)

•

(1 )

()

(1)

~ NYLON STOP CABLE (1)

Q(11
PHILLIPS MACHINE SCREWS
WITH LOCK WASHERS
(1)

PHILLIPS MACHINE SCREWS

~ WITH LOCK WASHERS (13)

WASHERS

(2)

FASTENERS

(4)

(1 )

~ U NUTS

FLAT HEAD PHILLIPS
MACHINE SCREWS

(8)

Ci!J7

PHILLIPS TAP SCREWS

LOCKING HEX NUT

A-4

(12)

Installation/Conversion Procedures

2 Install all Brackets. Install the Front Fasteners.

ATTACH FASTENERS
AND SECURE FRONT
BRACKETS TO THE

LEFT FRONT BRACKET AND FASTENERS

3 Secure the End Plate to the Rails. Attach the Left and Right Rails to
the Rack.

LEFT FRONT RACK

LEFT REAR RACK

A-5

Installation/Conversion Procedures

Slide the System into the Rack. Attach the Front Cover.

~SCREW(S)1

5 Secure the Restraining Cable and Attach the Locking Plate to
the Rack.

•

Return to Step 4 of Chapter 1, Installation.

LEFT REAR RACK
NYLON STOP CABLE

SLIDE UNIT IN PLACE AND
SECURE NYLON CABLE AS SHOWN

A-6

Installation/Conversion Procedures

VT100 INSTALLATION

1 Set the Terminal Power Switch to 0 (OFF) and Connect the Keyboard.

Identify the Power Cable Plug and Check the Terminal Voltage Switch
Setting.
CAUTION
An incorrect voltage setting will damage your terminal.

115 V
THE SWITCH IS
ALREADY SET
TO 115 V
115 V

POWER
CABLE

220 V /230 V /240 V
SLIDE SWITCH TO
230 V

A-7

Installation/Conversion Procedures

3 Plug the Terminal in and Set the Power Switch to 1 (ON).
• After a beep, a blinking cursor. appears.
• If a flashing 4 appears, check that the keyboard cable is firmly plugged in.

POWER
CABLE

READ AND REMOVE -If-f~
WARNING LABEL

A-8

Installation/Conversion Procedures

Set the Terminal Transmit and Receive Speeds (Baud Rates).

• Press the Set-Up key. The terminal displays Set-Up A.
• Press the 5 key. The terminal displays Set-Up B.
• Set T (transmit speed) to 4800; press the 7 key until 4800 appears.
• Set R (receive speed) to 4800; press the 8 key until 4800 appears.
• Check that the On-Line light on your keyboard is on and the Local light is off.
• Press the 4 key to set the terminal on-line.
• Hold down the Shift key and press the S key. This saves the new settings.
• Press the Set-Up key to exit from Set-Up mode.

SET-UP B
TO EXIT PRESS "SET-UP"

I
111012111130100 40010

T SPEED 4800

R SPEED 4800

A-9

Appendix B
System Specifications
MicroPDP-ll systems allow multiple terminal installations on more than one floor
of a building or in more than one building. Your sales representative can provide
you with more information.

8-1

System Specifications

To get the best possible performance from your MicroPDP-ll system, you need to
provide the right operating conditions.
NOTE
Your terminal and printer may be different from those shown.

15 AMP DEDICATED CIRCUIT1 PHASE
POWER
CABLE

DO NOT SHARE
THESE LINES
WITH OTHER
ELECTRICAL
EQUIPMENT

8-2

System Specifications

OPERATING ENVIRONMENT

Table B-1

Electrical Requirements

Input

Specifications*

Line voltage
Voltage tolerance
Power source phasing
Frequency
Line frequency tolerance
Running current
Power consumption (max.)
Universal power sup-ply

120 V
88 V-128 V
Single
60 Hz
47 Hz-63 Hz

240 V
176 V-256 V
Single
50 Hz
47 Hz-63 Hz
4.4 A
2.2 A
343 W
345 W
Switchable for input voltage

* These depend on the voltage setting that you select.
Table B-2

Environmental Conditions
Operating

Maximum altitude
Temperature range*
Temperature change rate
Relative humidity
(noncondensing)

Nonoperating

2400 m (8000 ft)
12000 m (39400 ft)
15°C-32°C (59°F-89.6°F) -40°C-60°C (-40°F-140°F)
1°C/hour (33.8°F/hour)
10% to 95%
20% to 80%

* Reduce the temperature specification by l.8°e (1°F) for each 1000 m (3300 ft) increase
in altitude.

NOTE
Your service contract may require specific limits for temperature
and humidity.

8-3

System Specifications

PHYSICAL SPECIFICATIONS - MicroPDP-11 SYSTEMS

16.2 em
(6 in)

FLOOR STAND MODEL
31.75 kg (70 Ib)

DESKTOP MODEL
29.5 kg (65 Ib)

RACK MOUNT MODEl
24 kg (53 Ib)

8-4

64.2 em
(24.5 in)

System Specifications

RX50 DUAL DISKETTE DRIVE

Performance
Diskettes per dual diskette drive
Number of recording surfaces per diskette

2
1

Storage capacity
per diskette (96 tracks)
per track (10 sectors)
per sector
Transfer rate
Average access time

400 K (409,600 bytes)
5,120 bytes
512 bytes
31.25 Kbytes/s
264 ms

Functional Specifications
Rotational speed
Density

300 r/min
96 tracks per inch

Physical Specifications
Height
Width
Depth
Weight

8.4 cm (3.3 in)
14.7 cm (5.8 in)
21.6 cm (8.5 in)
1. 7 kg (3.8 lbs)

8-5

System Specifications

RD51 FIXED DISK DRIVE

Performance Specifications
Average access time
Average rotational latency
Transfer rate

85 mls
8.33 mls

5 Mbits/s (625 Kbytes/s)

Media Characteristics
Formatted capacity
Recording surfaces (heads)
Disks
Bytes per track
Bytes per sector
Sectors per track
Track per drive
Recording method

11.059 Mbytes
4
2
8,192
512
16
1,200
Modified Frequency Modulation (MFM)

Physical Specifications
Height
Width
Depth
Weight

8-6

8.4 cm (3.3 in)
14.7 cm (5.8 in)
21.6 cm (8.5 in)
2.7 kg (5 lbs)

System Specifications

RD52 FIXED DISK DRIVE

Performance Specifications
Average access time
Average rotational latency
Transfer rate

53 m/s
8.5 m/s
5 Mbits/s

Media Characteristics
Formatted capacity
Recording surfaces (heads)
Disks
Bytes per track
Tracks per drive
Track density (tpi)
Recording method

30.96 Mbytes
6
3
10,416
3,072
591
Modified Frequency Modulation (MFM)

Physical Specifications
Height
Width
Depth
Weight

8.25 cm (3.25 in)
14.6 cm (5.75 in)
20.32 cm (8 in)
3.15 kg (7 lbs)

8-7

System Specifications

TK50 TAPE DRIVE

Performance Specifications
Start distance
Stop distance
Data rate
Tape speed
Access time from insertion
of a new cartridge

12.7 cm (5 in) (min.); 30.5 cm (12 in) (max.)
8.9 cm (3.5 in) (min.); 12.7 cm (5 in) (max.)
45 Kbytes/s
75 in/s
1 min (min.); 35 min (max.)

Media Characteristics
Unformatted capacity
Recording medium
Recording density
Number of tracks
Mode of operation
Read/Write method
Recording method

132 Mbytes
1.27 cm (1/2 in) wide; 182.88 m
(600 ft) long magnetic tape
6667 bits per in
22
Streaming
Serpentine
Modified Frequency Modulation (MFM)

Physical Specifications
Height
Width
Depth
Weight

8-8

8.25 cm (3.25 in)
14.6 cm (5.75 in)
20.32 cm (8 in)
2.3 kg (5 lbs)

System Specifications

POWER SUPPLY

Output Current

4.5 A-36 A
+5 Vdc
+12 Vdc
o A-6 A
Total power output
230 W (max.)
Overvoltage protection
Overcurrent protection
Thermal shutdown
Digital standard AC OK, DC OK, and remote controller signals.

8-9

Appendix C
Related Documentation
Table C-1

MicroPDP-ll Library

Document

Order Number

MicroPDP-ll System Site Preparation and
Verification Guide
MicroPDP-ll Systems Owner's Manual
MicroPDP-ll Systems Technical Manual
MicroPDP-ll System Pocket Service Guide
MicroPDP-l1 System Illustrated Parts Breakdown
MicroPDP-l1 Systems Maintenance Guide
DZVll Asynchronous Multiplexer Technical Manual
KDJll-B CPU Module User's Guide
KDFll-BA CPU Module User's Guide
KDFll-B Print Set
KDJ11-BC Print Set
MSVll-P User Guide
MSVll-J MOS Memory User's Guide
RQDXl Controller Module User's Guide
RQDX2 Controller Module User's Guide
RQDX3 Controller Module User's Guide
RD52A Technical Description Manual
TK50 Tape Drive Subsystem Owner's Manual

EK-OLCP5-SP
EK-MICll-OM
EK-MICll-TM
EK-MICll-PS
EK-OLCP5-IP
EK-MICll-SG
EK-DZVll-TM
EK-KDJ1B-UG
EK-KDFEB-UG
MP-OI650-01
MP-0l969-0l
EK-MSVOP-UG
EK-MSVl]-UG
EK-RQDXI-UG
EK-RQDX2-UG
EK-RQDX3-UG
EK-RD52A-TD
EK-LEP05-0M

Microcomputer Handbook Series
Microcomputer Interfaces Handbook
Microcomputer and Memories Handbook
MicroPDP-ll Systems Handbook
PDP-II Software Handbook

EB-20175-20
EB-18451-20
EB-24944-20
EB-08687-20

Software Documentation
Introduction to RT -11
RT-ll System User's Guide
RSTS/E System User's Manual
RSX-llM System Generation and Installation Guide
RSX-llM-PLUS System Generation and Installation Guide

DEC-ll-ORITA-A-D
DEC-II-0RGDA-A-D
AA-5133B-TC
AA-H625C-TC
AA-H431C-TC

C-1

Related Documentation

You may order these by writing to:
Digital Equipment Corporation
Accessories and Supplies Group
P.O. Box CS2008
Nashua, NH 03061
Attention: Documentation Products

Table C-2

Diagnostic Software Documentation

Document

Order Number

XXDP+/SUPR User's Manual
DEC/XlI User's Manual
DEC/XII Cross Reference Manual

AC-F348A-MC
AC-F053-MC
AC-F055-MC

For further information on diagnostic software, refer to the PDP-ll Software
Components Catalog (AV-B02lE-TC). To order these documents, contact your
Digital sales representative.

C·2

Appendix D
MicroPDP-ll Options
Many information management and software tools are available for MicroPDP-ll
systems. Refer to the PDP-ll Software Components Catalog (AV-B021E-TC) or
contact your sales representative for a list of these tools.
You may add additional modules and components to the computer if there is available space on the backplane. The capacity of the power supply may also affect the
addition of options. Some options are customer-installable, while others require
installation by trained personnel.
For specific information about MicroPDP-ll options, refer to the MicroPDP-ll
Systems Technical Manual or to the documentation provided with the option.

0-1

MicroPOP-11 Options

TERMINAL AND PRINTER OPTIONS

You can use any of Digital's video or hard-copy terminals, and any LA-series
printer with MicroPDP-ll systems. MicroPDP-ll systems support terminals and
printers that meet EIA standard RS-232C.
The number of terminals or printers you may connect to a MicroPDP-ll system
depends on the model.
Some options available for MicroPDP-ll systems allow addition of four or more
terminals and printers. See the MicroPDP-ll Systems Technical Manual for
further details.
PROCESSOR OPTIONS

The basic MicroPDP-11 system processor can be expanded by the addition of
floating-point capability and commercial instruction set options. The following
options are for KDFll-B systems only.
1. The KEFll-AA Floating-Point Option (for KDFll-Bx only)

The KEFll-AA option performs operations on 32-bit and 64-bit floating-point
numbers. It provides up to 17 digits of precision and integer-to-floating-point
conversion. The option is a 40-pin chip that mounts directly on the CPU module.
2. The FPFll Floating-Point Option (for KDFll-B only)

The FPF11 option also performs operations on 32-bit and 64-bit floating-point
numbers and it provides up to 17 digits of precision, as well as integer-tofloating-point conversions. The FPF11 option operates six times faster than the
KEF11-AA option. The option is a quad-height module that is mounted in the
backplane.
3. The KEFll-BB Commercial Instruction Set (CIS) Option (for KDFll-Bx
only)

The KEFll-BB option provides improved COBOL performance, text editing, and
word processing capability. The CIS option adds character string instructions to
the basic PDP-ll instruction set. The option is a double-socket chip that is
mounted on the CPU module.

0-2

MicroPOP-11 Options

MEMORY OPTIONS

Table D-1 lists some of the memory options available for MicroPDP-11 systems.

Table D-1

MicroPDP-11 Memory Options

Module Number

Capacity

Chip

MCVll-DC
MSVll-PK
MSVll-PL
MRVll-D

32 Kbytes
256 Kbytes
512 Kbytes
64 Kbytes

16 K CMOS
64 K
64 K
Customer-supplied PROMs

COMMUNICATION OPTIONS

Table D-2 lists some of the communication options available for MicroPDP-ll
systems.

Table D-2

Communication Options

Model

Maximum
Speed

Transmission
Mode

DUVll-AP
DPVll-AP
DZVll-DP
DHV11-AP
DLV]1-LP
DLVE1-DP
DMVll-AP
DMVll-BP
DMVll-CP
DMVll-FP
DEQNA-KP

19,200
Synchronous
56,000
Synchronous
9,600
Asynchronous
38,400
Asynchronous
38,400
Asynchronous
19,200
Asynchronous
56,000
Synchronous
56,000
Synchronous
56,000
Synchronous
56,000
Synchronous
Controller to interface to a local area Ethernet network.

There may be some software restrictions on baud rates. Refer to your software
documentation.

0-3

MicroPOP-11 Options

MASS STORAGE OPTIONS

Table D-3 lists some of the mass storage options available for MicroPDP-11
systems.

Table D-3

MicroPDP-ll Mass Storage Options

Type

Storage Type

Formatted
Capacity per
Drive

TU58

Tape

512 Kbytes

TK25

Tape

60 Mbytes

Yes (22-bit)
Block mode

RXV21-EP

Diskette

512 Kbytes

Yes (18-bit)

RLV22-AP

Disk

lOA Mbytes

Yes (22-bit)

RX50

Diskette

2 X 400 Kbytes

Yes (22-bit)
Block mode

RD51

Fixed disk

10 Mbytes

Yes (22-bit)
Block mode

RD52

Fixed disk

31 Mbytes

Yes (22-bit)
Block mode

RC25

Disk platter
fixed/removable

52 Mbytes

Yes (22-bit)
Block mode

TSV05

Tape

40 Mbytes

Yes (22-bit)

DMA
Capability

This is only a partial list of options available for MicroPDP-ll systems. For a
complete, up-to-date list, contact your sales representative.

0-4

Glossary
NOTE
Italicized words in definitions are themselves Glossary entries.
Access time

The total time taken to find data in a storage location. For disks, the access
time is equal to the sum of the average latency time and the average seek
time.
ANSI

The acronym for "American National Standards Institute."
Answerback

A preprogrammed response from a terminal.
Application program

A program designed to meet specific user needs; for example, one that
monitors a manufacturing process.
Assembled program count

The address of an instruction relative to the starting address of the program.
Asynchronous multiplexer

A device that controls and alternates the transmission of signals in order that
more than one signal can be transmitted over a single communications line.
The data transmitted contains the necessary synchronizing information in the
form of start and stop signals.
Backplane

The panel into which all the system's printed circuit boards are inserted.
The backplane contains all their interconnecting wiring and permits
the printed circuit boards to share signals.

G-1

Glossary
Backup

The process of making copies of the data stored in your disk drivers) so that
you can recover that data after an accidental loss. You make these copies on
diskettes or magnetic tape.
Backup copy

A copy of data stored in your disk drive(s) or on diskettes. Backup copies are
made on diskettes or magnetic tape. It is good practice to make daily backup
copies of all data files you have changed. Also, each week, make a backup copy
of all the files on your fixed disk drive.
Baud rate

The speed at which signals are transmitted along a communications line. In the
case of binary signals, one baud equals one bit per second.
Binary

A number system that uses only 2 digits: 1 and o. These digits are represented in computer circuitry by the presence of current (equivalent to 1) or its
absence (equivalent to 0). All computer programs are executed in binary form.
Bit

A binary digit; the smallest unit of information in a binary system of notation,
designated as a 1 or a O.
Boot

A commonly used abbreviation for bootstrap.
Bootable medium

A device containing software (such as an operating system) that the computer's
bootstrap program can activate in order for the computer to begin processing.
Bootstrap
1.

A program which, in the case of the MicroPDP-ll system, you activate
when you turn on the computer. The program loads preliminary instructions into memory. These instructions then load an operating system or
other software into memory so the computer can begin processing.

To use a bootstrap program.

BOT

G-2

The acronym for "beginning of transmission."

The acronym for "beginning of tape."

Glossary

Buffer

A storage area that temporarily holds data being transferred between two
devices.
Bug

A mistake in the design or implementation of a program.
Bus

A group of electrical connections (wires) that carries signals between different
parts of a computer system.
Bus error trap

A high-priority interrupt that halts the processor routine and initiates a subroutine. The interrupt occurs because of an error on the bus (for example, a
device fails to answer at its expected address) and usually indicates a faulty
CPU or memory module.
Bus grant

Composed of two signals used by the CPU to acknowledge requests for the
bus.
1.

The bus interrupt acknowledge (BIAK) signal acknowledges an interrupt
request.

The bus direct-memory-access grant (BDMG) signal acknowledges a DMA
request.

A device receiving one of these signals will pass the signal on to the next
device on the backplane, only if it does not require the bus itself. Therefore,
devices closer to the CPU have priority over those further down the
backplane.
Byte

A group of eight binary digits (bits). A byte is typically one-half or one-quarter
the size of a word, depending on the computer.
CCITT

The acronym for "Comite Consultatif Internationale de Telegraphie et
Telephonie" (International Telegraph and Telephone Consultative Committee).
Central processing

The activities carried out by the central processing unit.

G-3

Glossary
Central processing unit (CPU)

The part of a computer system that controls the interpretation and execution
of instructions.
Channel

A path for electrical transmission between two points.
Command

An order given by a user to a computer, often through a terminal keyboard.
Communications line

A cable along which electrical signals are transmitted. Devices or computer
systems that are connected by communications lines can share information and
resources.
Computer system

A combination of hardware and software that performs specified operations on
data; often abbreviated as system.
Console terminal

The terminal you use when installing software and running diagnostic programs. In a MicroPDP-ll system, the console terminal is usually connected to
the AO socket at the rear of the system.
Control status register (CSR)

A register that contains status information about a device.
Controller

The computer component, usually a printed circuit board, that regulates the
operation of one or more peripheral devices.
Control panel

The part of a computer that contains its control switches and indicators.
CPU

Central processing unit.
CRC

The acronym for "cyclic redundancy check," a method of detecting errors.
Data

A formalized representation of facts, concepts, or instructions suitable to automated or human communication, interpretation, or processing.

G-4

Glossary

Data transmission

The movement of data, in the form of electrical signals, along a communications line.
Debug

To detect, locate, and correct mistakes (bugs) in a program.
Default

The value of a selection assumed by the computer when a specific value is not
supplied by the user.
Delimiter

A character that terminates a character string or message, or separates it
from surrounding text.
Device

Any equipment connected to a computer that is capable of receiving, storing,
or transmitting data. See input device, output device, input/output device.
Device name

The name that identifies a device within a computer system and used to refer
to that device when communicating with the system.
Diagnostic program

A program that detects and isolates malfunctions in a computer's hardware.
Disk

A rigid, flat, circular plate with a magnetic coating on which data is stored in
concentric circles (tracks). Disks come in different sizes, with different storage
capacities.
Disk drive

A device that records information on one or more rapidly spinning disks.
Diskette

A flexible, flat, circular plate with a magnetic coating, contained in a sealed
envelope, and used for storing data. Standard diameters are 133.4 mm (5.25
in) and 203.2 mm (8 in).
Diskette drive

A device that records information on one or more rapidly spinning diskettes.

G-5

Glossary

DMA

The acronym for "direct memory access," a facility that allows input/output
transfers to bypass the CPU's general registers and go directly to and from
memory.
DTR

The acronym for "data terminal ready," a control signal that enters a modem
from the terminal or communications device using the modem. When the signal is set, it informs the modem that the terminal is ready to transmit or
receive data. When the signal is clear, the terminal is not ready.
Dual-height module

An option for Q22-Bus systems that requires half a slot on the backplane.
Duplex

In communications, simultaneous, two-way, independent transmission in both
directions; also called full-duplex.
EIA

The acronym for the "Electronic Industries Association."
EIA interface

The standard code defined by the Electronic Industries Association for use in
data exchange.
EOT
1.

The acronym for "end of transmission."

The acronym for "end of tape."

EPROM

The acronym for "erasable programmable read-only memory," a ROM that
can be reprogrammed by a user.
Error message

A message displayed by the computer that indicates it has detected a mistake
or malfunction.
FCC

The acronym for "Federal Communications Commission," Washington, D.C.
File

A collection of related information treated by the computer as a single item.

G-6

Glossary
Firmware

A program of instructions that is in read-only-memory (ROM) so it will not be
changed. For example, the MicroPDP-ll and MicroVAX systems' firmware
includes the self-test program that runs every time you turn the computer on.
First address range

The range within which the starting address of a memory module must occur.
(For examples, see Table 4-4 in the MicroPDP-ll Systems Technical Manual.)
The actual starting address is determined by the combination of the first
address range and the partial starting address.
Floating-point processing

A method of calculation that automatically moves the decimal point.
Formatted data

Data laid out in a particular pattern to conform to a predetermined structure.
The structure is dictated by the operating system.

FRU
The acronym for "field replaceable unit."
Full-duplex

A form of data transmission in which messages can pass through a circuit, in
both directions, simultaneously; also called duplex.
Graphics

The use of lines and figures to display data, as opposed to the use of printed
characters.
Half-duplex

A form of data transmission in which messages can pass through a circuit in
both directions. However, transmission in both directions cannot take place
simultaneously.
Hard-copy terminal

A terminal that displays information on paper, rather than on a screen.
Compare video terminal.
Hardware

The physical components, mechanical and electrical, that make up a computer
system. Compare software.

G-7

Glossary

Head

The part of a disk or diskette drive that reads, records, and erases data; also
called read/write head.
Hertz (Hz)

A unit of frequency equal to one cycle per second.
Input device

A piece of equipment that is used to get data into a computer; a keyboard, for
example.
Input/output (I/O) device

A piece of equipment that accepts data for transmission both to (input) and
from (output) a computer; a terminal, for example.
Instruction set

A group of commands that tells the computer what operation to perform.
Interactive

A method of communicating with a computer system in which you type a
command at the keyboard, the system executes the command and responds,
usually with a prompt for a further command.
Interface

A device or software program that allows two components of a computer to
communicate with each other.
Interrupt

A break in a program, caused by an external source, that requires that control
pass temporarily to another program.
I/O

Abbreviation for "input/output."
I/O page address

The physical address of a device register.
ISAM

The acronym for "Index Sequential Access Method," the technique for accessing records in files that have an indexed sequential organization.
Jumper

An electrical conductor used to complete a circuit, and so affect the logic of a
circuit board.

G-8

Glossary

K
When referring to the storage capacity of a computer, the symbol that means
2 to the 10th power (1024 in decimal notation). Hence, a 4 K memory has
4096 words.
Kbyte

Abbreviation for kilobyte.
Keyboard

The part of a terminal you use to type commands and text.
Kilobyte

1024 bytes.
Latency time

The delay while waiting for data on a rotating disk to reach the disk head.
The average latency time is equal to half the time taken for one revolution of
the disk.
LED

The acronym for "light-emitting diode."
List processing

A feature of some word processing software you can use to produce many
copies of a standard text, with certain information changing from one copy to
the next. For example, you can use list processing to produce personalized
letters.
Load

To move software, usually from a peripheral device into memory.

To physically place a disk into a disk drive, or tape into a tape drive.

LSI

The acronym for "large-scale integration."
Magnetic tape

A long strip of plastic coated with magnetic oxide, used for storing data; often
called magtape.
Mbyte

Abbreviation for megabyte.

G-9

Glossary

Megabyte

1,048,576 bytes.
Memory

The area where a computer finds the instructions and data it needs to process,
and where it stores the results. Memory is organized as a series of locations,
or cells, each of which can hold one word. The locations are numbered in
sequence. These numbers, or addresses, enable the computer to refer to the
memory's contents.
Memory management unit

A device that extends the amount of memory the CPU can access to 64 Kbytes
or more. The memory management unit also protects and organizes areas of
memory.
Menu

A displayed list of options.
Mode

A state (e.g., line or local mode) or method of operation (e.g., console dialog
mode).
Modem

The acronym for "modulator-demodulator," a telecommunications device that
provides an interface between a computer and a peripheral device or another
computer.

MaS
The acronym for "metallic oxide semiconductor."
Mount (a disk)

To load a disk into a disk drive, and put the drive on-line.

MSCP
The acronym for "mass storage control protocol."
Nonvolatile memory

A storage medium that retains its data in the absence of power.
ODT

The acronym for "on-line debugging technique."
Off-line

Pertaining to equipment, devices, and events that are not under direct control
of a computer.
G-10

Glossary

On-line

Pertaining to equipment, devices, and events that are in direct communication
with a CPU and thereby under its control in some way.
Operating system

A collection of computer programs that controls the overall operation of a
computer and performs such tasks as:
1.

Assigning places in memory to programs and data

Processing requests, scheduling jobs, and

Controlling the operation of input and output devices.

Output device

A piece of equipment used to extract data from a computer system; a printer,
for example.
Parity bit

An extra bit added to a byte or word to ensure there is always either an even
or odd number of bits, according to the logic of the system.
Parity error

An error caused when the value calculated for a parity bit is not equal to its
actual value.
Partial starting address

The starting address of a memory module relative to the first address range
for that module. (For examples, see Table 4-4 in the MicroPDP-ll Systems
Technical Manual.) The actual starting address of the module is determined
by the combination of the first address range and the partial starting address.
Peripheral device

Any device distinct from the central processing unit that provides it with
additional memory storage or communication capability; disk and diskette
drives, vide.o terminals, and printers, for example.
Power-up sequence

A series of ordered events that occurs when you turn on a system.
Printer

A peripheral device that provides paper copies of information stored in a
computer.

G-11

Glossary

Processor status word

A register in some computers that indicates the current priority of CPU
operation, the condition of the previous operation, and other basic control
information.
Program

A complete sequence of instructions necessary for a computer to perform a
task. See software.
Program counter

A register in the CPU that holds the address of the next instruction (except in
the case where the current instruction causes a jump).
PROM

The acronym for "programmable read-only memory," a ROM that can be
programmed by a user.
Prompt

A word or symbol a computer displays to indicate it is waiting for you to type
a command.
Protocol

A formal set of conventions governing the format and relative timing of message exchanges between two communicating processes.
Q22-Bus

An extended version of the LSI-Bus that allows 22-bit addressing.
Quad-height module

An option for Q22-Bus systems that requires a full slot on the backplane.
RAM

The acronym for" random-access memory," a memory in which the CPU can
access all locations with equal facility.
Random-access

Pertains to a storage device from which data or blocks of data can be read in
any order.
Read-only memory (ROM)

A memory that does not allow modification of its contents. That is, a computer
can use the data in a ROM, but cannot change it.

G-12

Glossary
Real-time

Refers to the actual time during which a process takes place.
Reboot

To restart a computer system. Pressing the Restart button on the control
panel reboots the MicroPDP-ll system.
Record

A set of related data that a program can treat as a unit. A file consists of a
number of records.
Reserved instruction

An instruction that is not available to the system. For example, instructions
relating to floating-point operations are not available to systems that have no
floating-point options installed.
Reserved instruction trap

A jump to a specified location that occurs when the system attempts to execute a reserved instruction.
ROM

The acronym for "read-only memory," preprogrammed memory that can be
read from, but not written to.
RTS

The acronym for "request to send," a signal sent from a terminal to a modem
to inform the modem that the terminal is ready to transmit data.
Run

A single, continuous execution of a program.

To execute a program.

Seek time

The time taken for a disk drive's read/write heads to move to the required
track on the disk.
Serial line unit

A device that provides an interface between a serial communications line and
the CPU module.
Serial transmission

A method of transferring data in which the bits of the characters are sent
sequentially on a single path.

G-13

Glossary

Software

Programs executed by a computer system to perform chosen or required
functions. Compare hardware.
Software package

A set of related programs that together perform a specific task.
Stop bits

In serial transmission, one or two bits that are transmitted at the end of a
data word. The stop bits give the receiver time to ready itself for the next
data word.
Storage medium

Any device capable of recording information; a diskette, for example.
Store

To enter data onto a storage device, such as a disk, or into memory.
Synchronous
1.

Having identical time periods.

A communications format in which each data character uses the same
time period. The data, including blank time, is controlled by an external
clock device or modem.

System

A computer system; a combination of hardware and software that performs
specific processing operations.
System management

Tasks performed by the operating system that control the overall operation of
the computer system.
System mapping routine

A program that finds and displays the hardware addresses of the devices in a
system.
Terminal

An input/output device generally used for communication between the user of
a computer system and the system itself. Terminals are divided into two basic
categories: video and hard-copy.
Track

A path on a diskette, disk, or tape that holds data.

G-14

Glossary
Trap

A conditional jump to a known memory location, performed automatically
by hardware. The jump occurs when the execution of an instruction causes
an unexpected result. The address location from which the jump is made is
stored. (A trap is distinguished from an interrupt in that an interrupt is caused
by an external event.)
USART

The acronym for "universal asynchronous receiver/transmitter," a device that
performs parallel-to-serial and serial-to-parallel conversion.
Utility program

A program used to perform some frequently required process in the operation
of a computer.
Video terminal

A terminal that displays information on a screen. Compare hard-copy terminal.
Winchester disk

A hard disk permanently sealed in a drive unit to prevent contaminants from
affecting the read/write head.
Word

The largest number of bits a MicroPDP-ll system can process in anyone
operation. Some computers can process longwords (two words), and quadwords
(four words).
Word processing software

Software you use to process text; for example, to create, edit, and print
documents.
Write-protect

To protect a disk, diskette, or other storage medium against the addition,
revision, or deletion of information.
Write-protect sensor

The part of a diskette drive that registers whether the write-protect notch of a
diskette is covered.
Write-protect notch

A small notch in the side of a diskette's jacket that you cover with an adhesive
label or tab to write-protect the diskette.

G-15

Index
Air flow,

1-3

Backplane, D-l
Backup copy
description, 2-12
guidelines, 2-12, 2-21
how to make, 2-12, 2-21
storage, 2-12, 2-21
Baud rate
console terminal, 1-7
Digital's terminals, 1-7
receive speed, A-9
speed control knob, 1-7
transmit speed, A-9
troubleshooting, 3-5
VT100, A-9
Boot error message, 3-9, 3-11
Buttons
Halt
function, 2-3
how to use, 2-3
troubleshooting, 3-5
list of, 2-3
Ready
function, 2-3
how to use, 2-3
Restart
function, 2-3
how to use, 2-3
troubleshooting, 3-5
TK50 tape drive, 2-4
troubleshooting, 3-5-3-8

Write-protect
function, 2-3
how to use, 2-3
Cartridge release handle
troubleshooting, 3-6, 3-7
use, 1-17,1-20,2-4
Caution
TK50 tape drive warning, 2-19
voltage switch setting, 1-11, A-7
Circuit breaker
location, 3-4
troubleshooting, 3-5
Components, D-l
CONFIG, 1-22
Console terminal
cable, 1-8
install, 1-5, 1-8
instructions, 1-5
troubleshooting, 3-5
Control panel. See also buttons
buttons, 2-2
description, 2-2
indicators, 2-2
table
buttons, 2-3
indicators, 2-3
Controller
error message, 3-10-3-11
non-existent, 3-10-3-11
Cover
remove, 1-6
replace, 1-12
CPU error message, 3-10-3-11
Index-1

Index

DC OK indicator, 2-3
See also indicators
Desktop unit, convert to, A-I-A-3
Device
definition, 1-9
error message, 3-10-3-11
install additional, 1-9
testing, 3-16
Diagnostic tests
definition, 3-1
location, 3-1
user, 3-12-3-17
Diskette. See also backup copy;
write-protect
arrow, 1-15, 2-9
backup copy, 2-12
blank
install, 1-21, 3-15
location, 1-14
erase, 2-9
formatted, 2-11, 3-7
handling, 2-1,2-9-2-13
holder, 1-20
install, 1-15, 1-21,2-12
jacket, 2-11
labels, 2-10
no disk present, 3-9, 3711
parts of, 2-11
protective envelope, 2-11
reading from, 2-10
removing, 1-20
storage, 2-10
user test location, 1-14
write-protect, 2-10
writing to, 2-10
Diskette drive
door operation, 2-12-2-13
indicators, 2-9, 2-12
read error, 3-7
write error, 3-8
insert or load, 2-12

Index-2

Documentation
handbooks, C-l
hardware, C-l
how to order, C-2
software, C-2
table, C-l
Door, rear
close, 1-12
open, 1-6
Drive not ready, 3-9, 3-11
Electrical requirements, B-3
Environmental conditions, 1-3, B-3
Error message. See troubleshooting
CPU, 3-10
table, hardware-initiated, 3-9
VT100, A-8
Fixed disk
read error, 3-7
write error, 3-7
write-protect, 2-3
Floating-point options, D-2
Formatted diskette. See diskette
Halt button. See also buttons
function, 2-3
indicator, 2-3
using, 2-3
Hardware. See also troubleshooting
diagnostics, when to use, 3-18
error table, 3-9-3-10
Help
damaged or missing items, 1-2
site preparation, B-1
troubleshooting, 3-1-3-18
who to call, 1-1
Humidity requirements, B-3
Illegal device message, 3-7
Indicators
DC OK, function, 2-3
Run, function, 2-3

Index

TK50 tape drive, function, 2-5
write-protect, function, 2-3
Installation
additional devices, 1-9
console terminal, 1-8
labels, 1-4
procedure, 1-1-1-13
software, 1-21
testing, 1-13-1-20
TK50 tape cartridge, 1-17, 2-18
user test, 1-15
Isolating a problem, 3-3
Label
control panel, 1-4
diskette drive, 1-4
TK50 tape cartridge, 2-15
user test diskette, 1-14
user test TK50 tape
cartridge, 1-16
Load
diskette, 1-15
software, 1-21
TK50 tape cartridge, 1-17
user test, 1-15
Load/unload button
indicator, 2-5
using, 1-17,2-18
Magnetic tape, 2-14
See also TK50 tape cartridge
Operating environment, B-2, B-3
Operating system
CONFIG, 1-22
installation, 1-21
SYSGEN, 1-22
troubleshooting, 3-7
Operation, 2-1-2-21
Options
communication
restrictions, D-3
table, D-3

mass storage
formatted capacity, D-4
table, D-4
memory, table, D-3
printer, D-2
terminal, D-2
Ordering documentation, C-2
Physical size, B-4
Power cable
identification, 1-10, A-7
install, 1-12
troubleshooting, 3-5
Power consumption, B-3
Power supply specifications, B-9
Power switch
function, 2-3
troubleshooting, 3-5
using, 1-12, 1-13, 2-3
Power-up
buttons and indicators, 2-6
error message, 3-3
help, 2-6
no software installed, 2-8
options, 2-8
problems, how to fix, 2-6
sequence, 2-6
software installed, 2-7
table, 2-6
test, 2-7,3-2
Problem-solving table, 3-5
Processor options, D-2
Rack mount unit, install, A-2-A-6
RD51 fixed disk drive,
specifications, B-6
RD52 fixed disk drive,
specifications, B-7
Read error, 3-7
Ready button. See also buttons
use in testing, 1-16
using, 2-3
Index-3

Index

Reference. See documentation, C-2
Repairs. See troubleshooting, 3-4
Restart button. See also buttons
use in testing, 1-18
using, 2-3
Rewind a tape cartridge, 2-20
Run indicator, 2-3
RX50 diskette. See diskette
RX50 dual diskette drive,
specifications, B-5
Screen
no software installed, 2-8
power-up, 1-13,2-7-2-8
software installed, 2-7
user test
diagnostic menu, 1-18
error message, 3-17
successful test, 1-19
test directions, 3-14
Service contract, B-3
Site preparation, 1-3, B-I-B-4
Speed
baud rate, 1-7
control knob, 1-7
Storage devices. See options
SYSGEN, 1-23
System will not start, 3-6
Tape. See TK50 tape cartridge;
TK50 tape drive
Tape drive. See TK50 tape drive
Temperature requirements, B-3
Terminal
console terminal, 1-5
hard-copy, D-2
VT100
baud rate, A-4
install, 1-5, A-7-A-9
Testing strategy, 3-2-3-3
See also troubleshooting

Index-4

TK50 tape cartridge
caution, 2-19
does not unload, 3-7
erase, 2-14
handling guidelines, 2-17
installation, 1-17, 2-18
labeling, 2-15
loading time, 2-4
no tape present, 3-10
read error, 3-8
removing, 1-20, 2-20
rewind, 2-20
storage capacity, 2-14
storage temperature, 2-17
user test, 1-16
using a new tape cartridge, 2-17
warning, 2-19
what to order, 2-17
write error, 3-8
write-protect, 2-16
TK50 tape drive. See also
troubleshooting
button
description, 2-4
operation, 2-18
cartridge release handle
operation, 2-18
troubleshooting, 3-6, 3-7
use, 2-4
caution, 2-19
controls and indicators, 2-4-2-5
does not start, 3-6
indicators
function, 2-5
operation, 2-18, 2-20
inserting a tape, 2-18
load/unload button, 2-4, 2-18, 2-20
locked tape, 2-4
operation, 2-18-2-20
red indicator, 3-6
remove a tape, 2-20

Index

specifications, B-8
warning, 2-19
Troubleshooting
definition, 3-1
error message, 3-3, 3-7
hardware-initiated error, 3-9-3-10
isolating a problem
message, 3-3
solutions, 3-3
procedure, 3-4
read error, 3-7
repairs, major, 3-4
repairs, minor, 3-4
software not present, 3-2
system will not start
from diskette drive, 3-6
from fixed disk drive, 3-6
table, 3-5-3-8
tape read error, 3-8
tape write error, 3-8
TK50 cartridge release
handle, 3-6, 3-7
TK50 tape drive
does not start, 3-6
TK50 red indicator, 3-6
TK50 tape, 3-7, 3-10
user test
diskette, 3-8
when to use, 3-2
write error, 3-7
write-protect problems, 3-7, 3-8
Unit number error message, 3-10
User test
blank diskette, 3-15
definition, 3-12
description, 3-2, 3-12-3-17
diagnostic menu
options, 1-19,3-12-3-13
to return to, 1-19,3-13

diskette
does not run, 3-8
label, 1-14
location, 1-14
error message
example, 3-17
how to proceed, 3-17
what to do, 3-18
how to run, 3-13-3-16
install, 1-15
location, 3-12
screen instructions, 3-15
successful test message, 1-21
test running screen, 3-16
TK50 tape
Micro-l1 User Test, 1-16
when to use, 3-2, 3-12
Voltage switch
caution, 1-11
setting, 1-11, A-7
Voltage tolerence, B-3
VT100. See also terminal
baud rate, A-9
error message, A-8
installation, A-7-A-9
on-line, A-9
receive speed, A-9
set-up, A-9
transmit speed, A-9
Write error, 3-7, 3-8
Write-protect
button, 2-3
diskette
how to, 2-10
notch, 2-10
tab, 2-10
fixed disk, 2-3
indicator, 2-3
TK50 tape cartridge, 2-16
troubleshooting, 3-7
Index-5

C. 15162; 1-1, MR-13452; 1-2, MR-13453; 1-3, MR-13454; 1-4, MR-13456; 1-5, MR-13457; 1-5, MR-13458; 1-6, MR-13459; 1-7, MR-13460; 1-8, MR-13461;
1-9, MR-13462; 1-10, MR-13463: 1-11, MR-13464; 1-12, MR-13465; 1-13, MR-15509; 1-14, MR-13466; I-IS, MR-13467; 1-16, MR-15512; 1-16, MR-15513;
1·17, MR-15504; 1-18, MR-15511; 1-18, MR-13469; 1-19, MR-13470; 1-19, MR-13471; 1-20, MR-15506; 1-21, MR-13472; 2-2, MR-13473; 2-4, MR·15508;

2-6, MR-13474: 2-7, MR-13468: 2-8, MR-13479: 2-9, MR-13476: 2-10, MR-13477: 2-11, MR-13466: 2-13, MR-13478: 2-14, MR-15507: 2-15, MR-14176:
2-16, MR-14177: 2-17, MR-15514: 2-19, MR-15505: :1-3, MR-13479: 3-4, MR-13480: 3-12, MR-13469: 3-14, MR-13469: 3-15, MR-13470: 3-15, MR-13481:
3-16, MR-13482: 3-17, MR-13483: A-2, MR-13484: A-2, MR-13485: A-3, MR-13486: A-3, MR-13487: A-4, MR-13488: A-5, MR-13489: A-5, MR-13490: A-6, MR-l:l491:
A-6, MR-13492; A-7, MR-13493; A-7, MR-13494; A-B, MR-13495; A-9, MR-13496; B-1, MR-11435; B-2, MR-13497; B-3, MR-13498