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Document:	Firefox Workstation Packaging
Order Number:	MISC-68363BFE
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Firefox Workstation Packaging
Revision 3.0

Janice Ferguson (DECWSE:-FERGUSON)

Workstation Systems Engineering
Digital Equipment Corporation
100 Hamilton Avenue
Palo Alto, CA 94301
415-853-6750

December 28, 1987

RESTRICTED DISTRIBUTION

Copyright 1986, 1987 by Digital Equipment Corporation
The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for
any errors that may occur in this document. 1bis specification does not describe any program or product
currently available from Digital Equipment Corporation. Nor does Digital Equipment Corporation commit
to implement this specification in any product or program. Digital Equipment Corporation makes no commitment that this document accurately describes any product it might ever make.

Blank Page

Table of Contents

2. Workstation Packaging

2.1. Terminology .................................................................................................................... .
2.2. System Box .... .. ... ....... ..... .......................................................................... .......... ..... .. .. ....

2.2.1. DSSI Control Panel ... ...................... ....... ....... .. ........ ................ ..... ... .... ... ..... .. .. ....

2.2.1.1. Remote Front Panel Interface ... ........................... .... ........................... .. ...........
2.2.1.2. Power Supply Status ........................................................................................
2.2.1.3. Halt and Reset ..................................................................................................
2.2.1.4. Power OK ....... .. ... .. .............. ... .. ... ................ ........ .. .. ............... ......... ... .. .. .........
2 .2.1.5. Physical Description ..... ... .... ... .. ... .. .. .. . .. ... .. .. ... .. ... .. .. ... .. ... .... ... . .... ....... .. ... .. .. ... .

6
6
7
8

2.2.2. DSSI Devices ......................................................................................................
2.2.3. Modular Power Supplies

2.2.3.1. Backplane Connections ...................................................................................
2.2.3 .2. Mass Storage Connections . ....... ............... .. .. ... .. ... .. .. ... .. .... .... .. .. .. .. ...... .. ... .. .. ... .
2.2.3.3. BDCOK ...........................................................................................................
2.2.3.4. BPOK ...............................................................................................................
2.2.3.5. MI'BF ...............................................................................................................
2.2.3.6. Physical Attributes ...........................................................................................

12
12
12
12
13
13

2.2.4. Backplane ...........................................................................................................

2.2.4.1. Module Placement ...........................................................................................
2.2.4.2. Acceptable Module Outlines ...........................................................................

13
14

2.2.5. Covers .................................................................................................................

2.2.5.1. 1/0 Cover Assembly ........................................................................................
2.2.5.2. Graphics Cover Assembly ...............................................................................
2.2.5.3. Q-bus Covers ...................................................................................................

16
16
16

2.3. Mass Storage ....................................................................................................................

2.3.1. RF30 Hard Disk Unit ..........................................................................................
2.3.2. RF71 Hard Disk Unit ..........................................................................................
-··---2.3.3. lBO Cartridge Tape Unit ..................................................................................
2.3.4. 'I'F70 Cartridge Tape Unit ..................................................................................

17
19
21
21

2.4. Monitor ............................................................................................................................

2.5. Keyboard . .. ... .. .. ... .. . .. .. .. ... .. .. . .... .. . .. ... . ... .. ... .. . .. .. .. . .. ... .. .. .. . .... . .. .. ... .. ... .. .. .. . .. ..... .. .. . .. ... .. .. ... .

2.6. Mouse ..... ........................... ............................... ...................... .............. ............ ..... ... .. .. ... .

2.7. Tablet ................................................................. .,............. ... ................... .........................

iii

2.8. Cables ..... :.:.·......................................................................................................................

2.8.1. Monitor/Keyboald/Mouse Cable .... .. .. ... ..... .. .. ... .. ... .. .. ... .. ... .. .. ... ..... .. .. ... .. ... .. .. ... .

2.8.1.1. Keyboard/Mouse D-Sub Connector ... .. ... .. .. ... .. ... .... ... ..... .. .. ... .. ... .. .. ... .. ... .. .. ... .
2.8.1.2. Keyboard Micro-DIN Connector . .. .......... .... ........................ ...................... ......
2.8.1.3. Mouse Micro-DIN Connector .........................................................................

27
28

2.8.2. Modem Cable ..................................................... ..... .................................... ........
2.8.3. ThickWire Ethernet Cable ..................................................................................
2.8.4. ThinWire Ethernet Cable ....................................................................................
2.8.5. Printer/Console Cable .........................................................................................
2.8.6. Backplane to DSSI Control Panel Cable ............................................................
2.8.7. I/O Cover Module to Workstation I/0 Module Cable ........................................

29
30
30
30
31
31

·Revision History

Date
28 Dec 87

Version
3.0

Changed I/0 cover from 3-wide to 6-wide
Changed box to BA213 series
Added Thin Wire(Ibick Wire Ethernet info
Added more definition to cables

01May87

2.0

Added cover and cables
Changed module outline

07 Feb 87

1.0

First external release

Content/Changes

Blank Page

2. Workstation Packaging

Firefox is composed of standard DIGITAL corporate components and those components unique to Firefox.
This section describes the hardware packaging of Firefox, which is pictured in Figure 2-1.

Figure 2-1:

Firefox Workstation Packaging

The Firefox workstation has the following physical components:
System box

Firefox uses the Fbox. The Fbox is derived from the standard Sbox (BA213-A). The
backplane is specific to Firefox. Nine slots hold modules wlique to Firefox. Three slots
are available for standard Q-bus peripherals in an optional configuration. The Fbox
houses the RFXX hard disk drive and TFXX cartridge-tape drive.

Monitor

A new monitor (VR295) is required.

Keyboard

The standard LK201 or LK301 keyboard family is used.

Mouse

The corporate mouse (VSXXX-AA) is used.

Tablet

The graphics tablet (VSXXX-AB) is optional.

2.1. Terminology
Dual CPU medule

The Firefox processor module containing two CVAX processors and their
associated logic; plugs into the M-bus on the backplane

DSSI

DIGITAL Small Storage Interconnect; a new architecture for mass storage

Fbox

Fuebox, the Firefox-specific version of the BA213-series box

Graphics base module

The Firefox graphics processing module

Graphics expansion module

The optional Fuefox graphics module containing sixteen planes of video
memory

Graphics frontplane

The module that attaches to the front of all three graphics modules; it contains three high-density connectors, four LEDs, and three BNCs

2.1. Workstation Packaging

December 28, 1987

Firefox System Specification I

DIGITAL EQL"IP~E.~"'T CORPORATIOS - RESTRICTED DISTRJBLIIOS

Graphics cover

A triple-slot piece of metal with holes in it that the video BNCs stick
through

Graphics cover assembly

The graphics cover plus the graphics frontplane

Graphics ouput module

The Firefox module that contains the video-output logic and eight planes of
video memory

1/0 module

The Firefox module that contains the controllers for Ethernet, mass storage,
time-of-year clock, console/printer, keyboard, mouse/tablet, and modem;
plugs into the M-bus on the backplane

1/0 cover module

The module with the I/0 connectors and ethernet transceivers

1/0 cover

A six-slot piece of metal with holes in it that the hex display and I/0 connectors stick through

1/0 cover assembly

The 1/0 cover, 1/0 cover module, battery, and battery holder

Sbo!1t

Skunkbox, the corporate BA213-series box, with a 12-slot Q-bus backplane

2.2. System Box
The Fbox is the Firefox package. It meets the principal requirements of low cost and modularity in combination with adequate space for the required modules and mass storage. It is similar to the standard Sbox.
The differences between the two are shown in Table 2-1.
Table 2·1:

Fbox/Sbox Dlff9renc..

Fbox
Disk controller in slot 4
3 slots with Q-bus backplane connectors
9 slots with comet connectors

Sbox
Disk Controller in slot 1 or 12
12 slots with Q-bus backplane connectors
No comet connectors

The following are the similarities between the Fbox and the Sbox:
•

Part of BA213 series

•

One or two plug-in modular power supplies

•
•

Four _cavities for mass storage devices
Low noise level

•

Same card cage and plastics

•

Hin- and Reset switches on the DSSI control panel

Figure 2-2 shows the dimensions of the BA213-series box. Dress panels are in place. The black panel is a
sliding door that covers the insertion slot for the tape drive, write-protect switches, power switch, Halt and
Reset switches, and panel-removal latch.
Three levels of security are provided by a three-position key. Position 1 is locked. Position 2 allows removal of media and access to the disk-drive operator controls and Halt and Reset switches. Position 3 allows
access to the power switch and panel-removal latch.

2 Firefox System Specification

December 28, 1987

Workstation Packaging 2.2.

DIGITAL EQUIPMENT CORPORATION - REsTRICTED DISTRIBUTION

t----l</~ ---__,,.1

""·'--------------------------.......

:Z.7

;

\t\~

\
Figure 2-2:

BA213-•rte• box, Panela In Place

2.2. Workstation Packaging
December 28, 1987
Firefox System Specification 3

DIGITAL EQlJIPME.~1 CORPORATION - RESTRICTED DISTR1BlHION

The Sbox, with dress panels removed and one module pulled halfway out, is shown in Figure 2-3.

Figure 2-3:

Sbox, Panels Removed

There are 12 module slots in the card cage of the Sbox. The power supplies are positioned at either end of
the card cage, and two variable-speed fans are located below it. The upper portion of the Sbox houses the
four mass storage cavities. The Fbox is the same as the Sbox in these features but differs in the mechanical
covers for the slot area.
The Fbox with dress panels removed is shown in Figure 2-4.

Figure 2-4:

Fbox, Panels Removed

4 Firefox System Specification

December 28, 1987

Workstation Packaging 2.2. l.

DIGITAL EQC'IPME..'.'T CORPORATION - RESTRlCTED DISTRIBL'TION

2.2.1. 0551 Control Panel

The DSS1 control panel (54-17388-01) resides in front of the mass storage cavities. The function of this
panel is to act as a remote front panel and implement the operator control signals for the three possible RF
units. It also implements power supply status, the Halt switch, and the Reset switch. The RF drives and
the control panel communicate by using the Remote Front Panel signals.
DSSI functionality will be implemented and controlled by write-protect switches and indicators, drive
online/offiinc switches and indicators. and drive fault indicators. There will be three sets of these switches
and indicators to control three RF drives. There will also be unit ID switches to set the addresses of the
drives.
The front panel will provide three separate power-OK (POK) signals to the three RF drives. To allow
proper power-up sequencing of the drives, the second POK signal will be delayed by seven seconds from
the other two POK signals.
The DSSI control panel will be mounted to an assembly that is part of the system box. This assembly will
provide space for a user to attach a language label; that label will indicate the functionality of the controls
and LEDs m clear, easy-to-understand phrases. Language labels will be available In eleven languages.
2.2.1.1. Remote Front Panel ln111rface

Each of the RF drives connects to the control panel via a 10-pin ribbon cable located at the rear of the
drive. The signal names assigned to the pin numbers are listed in Table 2-2. "Data out" meam data from
the drive.
Table 2-2:

RF Remote Front Panel Connector Pin Aulgnments

Function

l
2
3
4
5
6
7

Ground
RFP_DATA_OUT_L
RFP _ADDR<2>
RFP _DA TA_IN_L
+5V
+5V
RFP_STROBE_L
RFP_ADDR<l>
RFP_ADDR<O>
Ground

8
9
10

The RFP_DATA_IN switch value is interpreted according to the address assignments that appear in Table
2-3.
Table 2·3:

Switch Functions

Addres's- Function
000
BUSID<O>
001
BUSID<l>
010
BUSID<2>
011
Reserved
100
Fault
101
Rwi/stop
110
Write Protect
111
Loopback Input
The RFP_DAT A_ OlJT indicator signal is interpreted according to the address assigrunents shown in Table
2-4.

2.2. l. l. Workstation Packaging

December 28, 198 7

Firefox. System Specification 5

DIGITAL EQL1PME.'iT CORPORATION - RESTRICTED DISTRIBCTION

Table 2-4:

Indicator Functions

Address

Function

000
001
010
011
100
101
110
111

Reserved
Reserved
Reserved
Ready
Fault
Run/stop
Write Protect
Loopback Output

For each drive, the DSSI control panel will implement the following:
•

Write-protect switch and indicator (a switch containing an indicator LED)

•

Ready/stop switch and indicator (a switch containing an indicator LED)

•

Fault indicator (LED)

•

Bus ID

•

Loopback output connected to loopback input

•

Power OK

The write-protect switches are push-button maintained and whenever the switch is pressed in, the associated disk drive is write-protected and the LED is illuminated. When the switch is out, either the drive is
write-enabled or it can be write-protected by the host The color will be amber.
The ready switches are push-button maintained, and will allow access to the drive. Whenever the switch is
pressed in, the associated disk drive is off-line and cannot be accessed; the LED is not illuminated. When
the switch is in the out position (access to the drive is allowed), the LED will indicate drive activity; the
color will be green.
•

The LED will not be illuminated when the drive is being accessed

•

It will be illuminated when the drive is available to be accessed

The fault-indicator LEDs are turned on by the drive logic when it detects an error that it classified as a
fault The color will be red.
The bus ID, or unit ID, switches are BCD-encoded plastic lens caps that fit into a programmable-unit-select
switch. Each of these programmable units must have a lens cap installed. The user will choose which lens
cap to install. The caps will be encoded with plastic tabs corresponding to the number on the face of the
lens cap. Each Firefox system will be provided with a 12-28766-19, a kit of eleven lens caps: three blank
lens caps and and eight lens caps numbered 0 through 7.
2.2.1.2. Power Supply Statua

A gree~-LED (DCOK LED) to the right of the Halt and Reset switches indicates the status of the output
voltages of the power supplies. In a single-power-supply system, it indicates that the output voltages are
within tolerance. In a two-power-supply system it indicates that both power supplies are within tolerance.
If the LED on the control panel is out, the user has to look at the individual LEDs on the power supplies to
deternt ine which power supply is at fault.
2.2.1.3. Halt and Reset

The Halt and Reset switches are provided on the RF control panel.
The Halt switch is push-button maintained. Pressing Halt asserts BHALT on the backplane, which causes
all processors in the system to halt (enter console mode). The LED contained in the Halt switch is
illuminated when the switch in pressed in. The color is red.

6 Firefo:ic System Specification

December 28, 1987

Workstation Packaging 2.2. l .3.

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The Reset switch is momentary. The signal generated by this switch is de bounced on the DSSI control
panel. Pressing Reset causes BDCOK to pulse. A pulse on BDCOK initializ.es some registers, causes
self-test to occur, and then reboots the system. The LED contained in the Reset switch is controlled by a
bit in a register. This bit is used by the console code to indicate that the system is in run mode. When the
LED is illuminated, its color is green.
2.2.1.4. Power OK

The three power-OK signals. one for each of the RF drives, are on J4. The power-OK signal for drive 1
will be delayed from the other two power-OK signals (drives 0 and 2) by a minimum of seven seconds.
The pinout for J4 appears in Table 2-5.
Table 2-5:

Pin
1
2
3

Plnout for J4 (Power-OK Connector)

Signal
Drive 0 power OK
Drive 2 power OK
Drive 1 power OK

The connector J6 provides two more instances of the power-OK signals that will be used when the system
contains more than three DSSI devices. Pinout for 16 appears in Table 2-6.
Table 2-6:

Pin
1
2

Plnout for J6 (Power-OK Connector)

Signal
Drive 0 power OK
Drive 2 power OK

2.2. l.5. Workstation Packaging

December 28. 1987

Firefox System Specification 7

DIGITAL EQlilPME.NT CORPORATION - RESTRJCTED DISTRIBl7rION

2.2. 1.5. Phyalcal Description

The size of the DSSI control panel printed circuit board is approximately 4 inches by 6 inches. It is a fourlayer PC board, .096 inches thick (nominal), with one ounce copper. The two inner layers are power and
ground. The two outer layers are signal layers. All components are mounted on side l of the module.
A preliminary component location is shown in Figure 2-5.
4"
.+.

014

LJ16

UJI

D
Sll

logic

Unit ID

SlO

logic

5.2"

0110

LJ09

Fault

os3

Write
protect

DS4

Drive ready

logic

I
\

S2/D2

Restart switch
and

RUN LED
Figure 2·5:

012

locoK
I

osl/Dl

Halt switch
and
HALT LED

Propoeed Layout of the DSSI Control Panel

8 Firefox System Specification

December 28, 1987

Workstation Packaging 2.2. l.5.

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Mapping and function of the components on the DSSI control panel appear in Table 2-7. Drive 0 is
assumed to be the rightmost RF drive, Drive 1 to be in the middle, and Drive 2 to be the leftmost RF drive.
Table 2-7:

Component Mapping on the DSSI Control Panel

Reference Designator
Jl

12
J3
J4

15
16
SI
Dl
S2
D2
S3
D3
S4
D4
S5
D5
S6
D6
S7
D7
SS
D8
S9
SlO
Sll
D9
DlO
Dll
Dl2

2.2.2. Workstation Packaging

Component
l 0-pin right-angle header
10-pin right-angle header
10-pin right-angle header
3-pin right-angle header
10-pin right-angle header
2-pin right-angle header
Maintained switch
Red light-emitting diode
Momentary switch
Green light-emitting diode
Maintained switch
Amber light-emitting diode
Maintained switch
Green light-emitting diode
Maintained switch
Amber light-emitting diode
Maintained switch
Green light-emitting diode
Maintained switch
Amber light-emitting diode
Maintained switch
Green light-emitting diode
Programmable switch
Programmable switch
Programmable switch
Red light-emitting diode
Red light-emitting diode
Red light-emitting diode
Green light-emitting diode

Function
Drive 0 front panel interface signals
Drive 1 front panel interface signals
Drive 2 front panel interface signals
Power OK for three DSSI devices
Backplane signals
Power OK for two additional DSSI devices
Halt switch
Halt indicator
Reset switch
RUN indicator
Drive 0 write-protect switch
Drive 0 write-protect indicator
Drive 0 ready switch
Drive 0 available indicator
Drive 1 write-protect switch
Drive 1 write-protect indicator
Drive 1 ready switch
Drive 1 available indicator
Drive 2 write-protect switch
Drive 2 write-protect indicator
Drive 2 ready switch
Drive 2 available indicator
Drive 0 unit ID
Drive 1 unit ID
Drive 2 unit ID
Drive 0 fault indicator
Drive 1 fault indicator
Drive 2 fault indicator
DCOK indicator

December 28, 1987

Fircfolt System Specification 9

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2.2.2. DSSI Devices

The two rightmost mass storage devices are powered by the right power supply (one RF hard disk and one
TF tape). In the minimum Firefox configuration, only one bard disk can be used. The additional power
supply must be installed for additional bard disks. 1be two leftmost mass storage devices are powered by
the left power supply (two additional RF bard disks).
The 50-pin DSSI cable from the 1/0 module does not connect to the DSSI control panel. A SO-conductor
round cable connects to the 1/0 module and then is routed up to the mass storage cavities, to the right of the
tape. A 50-conductor fiat ribbon cable plugs into the round cable, then daisy-chains between the tape and
the three hard disks, ending in a connector after the last disk. Another cable, one end with a 50-pin header
plugs into the ribbon cable and then attaches with a high-density D-sub to the DSSI control panel bracket.
After the DSSI control panel cover is put in place, a high-density terminator is plugged into the highdensity D-sub. Part numbers are shown in Table 2-8.
Table 2-8:

DSSI Cable Part Numbers

Part Number
17-01930-01
17-01836-03
17-01835-03
TBD

Description
50-cooductor round (I/O module to mass storage area)
50-cooductor ribbon (connects masss storage devices)
50-conductor with high-dcmity D-sub
(mass storage to DSSI control panel bracket)
DSSI high-density tenninator

If the storage expansion box is used, the tenninator must be removed and the expansion box cable plugged
into the high-density D-sub.

---- '
------"__,,

I',
I

'
I
I

I
I

....
I •• '
I
'
I
'

'
I
I

I
I

''
Figure 2-6:

'--'-

------ --

·'

DSSI Cable Routing

10 Firefox System Specification

December 29, 1987

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DIGITAL EQL"IPME.~1 CORPORATION - RESTRlCTED DISTR1BL1ION

2.2.3. Modular Power ·supplies

The Fbox supports one or two modular power supplies plugged directly into the backplane.
The H7868 power supply operates by means of line rectification with energy storage in bulk input capacitors followed by a 45-KHz switching regulator stage.
The H7868 provides a +5-volt output, a +12-volt output, and two fan outputs whose voltages vary in
response to ambient temperature variations. The available power to the +5-volt and + 12-volt outputs is 230
watts with 284 Watts start-up surge capability for winchester disk drives. To allow for wiring and backplane drops, the voltage of the +5-volt and the +12-volt outputs at the power supply is 0.1 volt higher than
specified.
Intended system load is as follows:
+5 volts Logic
+ 12 volts Communications and disk-drive motor(s)
Fan out
Table 2-9:

Cooling fans (offset by 0.8 volts to avoid acoustic beating)

Power Supply Output Ratings

Output

Minimum Load

Maximum Load

+5. i volts
+12. l volts
Fan

4.5 amperes
0 amperes
0 amperes

33 amperes
7 amperes (11.5 amperes surge for 30 seconds)
0.7 amperes@ -12.8 volts, 0.43 amperes@ -7.8 volts

Note that simultaneous loading of the +5-volt and + 12-volt outputs may not exceed 230 watts.
Each power supply has a fan output that can drive two 4.5-inch DC brushless fans (12-23609-04 ). These
outputs may also have no fans connected. In the Firefox application, the rightmost power supply will drive
both fans, and the leftmost power supply fan output will not be cormected. Fan current is not included in
the specified +5-volt or +12-volt loads.
A switch on the front of the power supply will allow a full power-down, power-up signal sequence of
BPOK and BDCOK without removal of the input power.
For overload protection, a resettable circuit breaker is provided to protect the input wiring. This circuit
breaker is externally accessible and is rated at 7 .5 amperes. The circuit breaker will not trip under normal
operating conditions.
There are two ve~ions of the power supply :
•

H7868-A: 100-120 V AC nominal

•

H7868-B: 220-240 VAC nominal

2.2.3. l. Workstation Packaging

December 29, 1987

Firefox System Specification 11

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2.2.3.1. Backplane Connections

The backplane connection to the power supply is through a 56-pin card-edge connector. The pinout for
this connector is described in Table 2-10.
Table 2·10:

Backplane Connector Plnout

Connector Pin Numbers Maximum Current
33 amperes
5 - 21
22- 48
36 amperes

Signal Name
+5 volts
Ground
+12 volts
FanA
FanB
Fan ground
BDCOKH
BPOKH

49 - 53

3 amperes
0.7 amperes
0.7 amperes
1.4 amperes
100 milliamperes
100 milliamperes
100 milliamperes

2
4
1, 3

54
56
55

BEVNT

\\iben two power supplies are used in the same system, the Line Time Cock (BEVNT) signal, +5-volt
lines, +12-volt lines, and fan outputs of each power supply must not be connected to each other. However,
BPOK and BDCOK can be paralleled.
2.2.3.2. Mass Storage Connection•

Power is delivered to the mus storage devices is through a 9-pin MrA connector attached to the front of
the power supply.
Table 2·11:

Mass Storage Connector Plnout

Signal Name
Ground
+5V
+12V
Key (pin removed)

Connector Pin Numbers Max Current
1, 3, 8, 9
9 amperes
6, 7
4,5
2

NIA

2.2.3.3. BDCOK

1bis signal is userted high on the bus to indicate that the DC voltages on the outputs are within the
specified limits. The negated state of this signal remains valid under all conditions of +5-volt and + 12-volt
outputs being out of tolerance. The negated state of this signal is used by devices to protect nonvolatile
data from conuption by circuits whose perfonnance is not reliable in the absence of valid D.C. voltages.

-.- ....

2.2.3.4. BPOK

1bis signal is asserted high on the bus to indicate that the power system is in a state that allows normal
operation of the system. The negated (low) state of this signal remains valid under all conditions when
normal operation is not allowed. The ~ertion of BPOK indicates to the system that a sufficient reserve of
D.C. power has been established to guarantee an orderly shutdown of the system. The time interval
between the assertion of BDCOK and BPOK can be used by devices in the system to do some housecleaning prior to execution of instructions by the CPU(s).
BPOK deasserts at a root-mean-square input voltage below 88 volts. 1bis negation of BPOK indicates to
the system that a DC power failure is likely.

12 Firefox:. System Specification

December 29, 1987

Workstation Packaging 2.2.3.5.

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2.2.3.5. MTBF

Tue MTBF goal of the H7868 power supply is 60 K hours (at 50 degrees Celsius).
The calculated MTBF is shown in Table 2-12.
Table 2-12:

H7868 Calculated MTBF

Temperature
Calculated MTBF
(hours)
(degrees Celsius)
121,987
86.627
61,825

40
50

2.2.3.6. Physical Attributes

The power supply weight is 6.5 pounds nominal.
The size is approximately 10.5 inches x 10.1 inches x 2.5 inches with a 2.5-inch extension on the 10.5-inch
dimension for the AC input connector.
2.2.4. Backplane

The Firefox backplane is unique to the Fuefox system. Its dimensions are the same as those of the Sbox
backplane.
2.2.4.1. Module Placement

The backplane has twelve slots populated as shown in Table 2-13.
Table 2·13:

Positioning of Module• In the Backplane

Slot

Module

Required or Optional

1
2
3

Graphics expansion module
Graphics output module
Graphics base module
Workstation 1/0 module
Dual-CV AX processor module
Memory module (8 or 16 Mbytes)
Dual-CVAX processor or memory module
Memory module
Q-bus adapter or memory module
··Q~us module
Q-bus module
Q-bus module

Optional
Required
Required
Required
Required
Required
Optional
Optional
Optional
Optional
Optional
Optional

4
5
6
7
8
9
10
11
12

2.2.4.2. Workstation Packaging

December 29, 1987

Firefox System Specification 13

DIGITAL EQUIPMENT CORPORATION· RESTRICTED DISTRIBt,'TION

2.2.4.2. Acceptable Module Outlines

The three Q-bus slots (slots 10-12) can be populated by Q-bus modules with a dual or quad fonn factor.
These options, which can be used only when a Q-bus adapter module is installed, appear in Figlll'es 2-7 and
2-8.
5.187"

8.41"

Figure 2-7:

Dual Form Factor

10.436"

8.41"

Figure 2-8:

Quad Form Factor

14 Firefox System Specification

December 29, 1987

Workstation Packaging 2.2.4.2.

DIGITAL EQL1PMENT CORPORATION -RESTRICTED DISTRlBCTION

·The nine other slors (slots 1-9) are populated with a new fonn factor. called L-series quad. These slors use
comet connectors (L-series) in the backplane, and the modules are quad size; hence the name L-series
quad. This fonn factor closely matches the L-series hexadecimal fonn, except that it has two tabs instead
of three. The new L-series quad fonn factor is shown in Figure 2-9.
10.436"

I s.41"
I

j
Figure 2-9:

L-serles Quad Form Factor

2.2.5. Covers

The modules' metal covers, which are important design features of the Fbox, fonn a continuous surface
that becomes part of the RF shield. Connectors for the cables that exit from the box are mounted in the
module covers. Cables that plug into these connectors travel down inside the dress panels and out through
the guides and slots in the base platfonn. All nonbackplane communication hardware required between the
workstation 1/0 module and the outside world {LEDs, switches, connectors, and so forth) is mounted in
these handles.
The nine Firefox-specific slots have two covers.
•

One six-slot I/0 cover

•

One three-slot graphics cover

2.2.5. l. Workstation Packaging

December 29, 1987

Firefox System Specification 15

DIGITAL EQt:IPME.~ CORPORATION -RESTRICTED DISTRlBliTION

2.2.5.1. t/O Cover Assembly

The I/0 cover assembly consists of the 1/0 metal cover, an I/O cover module. and a battery and battery
holder. It is placed over the Frrefox workstation I/O module and five other modules that have no external
connectors (these include the memory. dual-CV AX processor. and the Q-bus adapter).
The I/O cover module connects to the workstation 1/0 module via a 50-pin twisted-ribbon cable. Connectors on the 1/0 cover module protrude through the I/O cover. Table 2-14 lists the the items that are seen on
the front of the 1/0 cover assembly.
Table 2-14:

1/0 Cover Assembly Features

Feature
ThickWire Ethernet
1bin Wire Ethernet
Ethernet switch
Printer/console
Modem
Keyboard/mouse/tablet
System status

Implementation
15-pin female D-sub connector
B NC receptacle
Slide switch
6-pin female MMJ connector
25-pin male D-sub connector
15-pin male D-sub connector
One hexadecimal display

The logic for both ThinWire and 'IbickWue Ethernet is present on the 1/0 cover module. However. only
one of the Ethernet connections can be used at a given time. A slide switch determines which is active.
The battery is mounted in a battery holder that is inside the I/O cover. It is attached to the cover module by
a two-wire cable that ends in a two-pin female connector. This female connector mates with a two-pin
right-angle male connector on the 1/0 cover module. The battery automatically recharges when power is
turned on. Battery power will last at least 100 hours when the power is turned off.
2.2.5.2. Graphics Cover Auembly

The graphics cover assembly consists of the graphics cover and the graphics frontplane. The graphics cover
goes over the three graphics modules (graphics base module, graphics output module. and graphics expansion module). The graphics frontplane is a module with three 100-pin high-density connectors. three
BNCs, and four LEDs. The high-density connectors on the graphics frontplane mate directly to highdensity connectors on each of the graphics modules (base module. output module, and expansion module)
in a 24-plane system. In an 8-plane system, the third high-density connector does not mate because the
expansion module is not present The three BNCs (red, gree~ and blue) and four LEDs (graphics subsystem status) protrude through the graphics cover. The graphics cover does not attach to the graphics
frontplane; it :°lounts on top of the frontplane.

2.2.5.3. Q.bua Cowra

When empty, each of the three Q-bus slots has a single-width blank cover (covers one slot). If a Q-bus is
occupied by a module with no 1/0, it retains its blank cover. If it is occupied by a module with external
connectors, the blank cover is replaced by a cover specific to that module (the standard Sbox handle or
cover). A "handle" is a type of cover that is riveted to a module; it usually has 1/0.

16 Firefox System Specification

December 29, 198 7

Workstation Packaging 2.2.5.3.

DIGITAL EQUIPME.NT CORPORATION - RESTRICTED DISTRIBCTION

2.3. Mass Storage
The mass storage tray on the top of the Fbox enclosure provides mounting space for four standard 5 114-inch
mass storage devices. Each mass storage device is shock mounted and can be separately removed or
installed.
2.3.1. RF30 Hard Disk Unit

The RF30 hard disk unit, illustrated in Figure 2-10, incorporates the following features:
•

Sire: half-height 5 1/4-inch Winchester disk

•

Media: non-operator-removable disks

•

Formatted capacity: 150 Mbytes

•

Transfer rate: 12.0 Mbits/sec

•

Seek time:
--Track to track: 6 ms
--Average:< 23 ms
--Maximum: < 41 ms

•

Average access time: 33.5 ms

•

Rotational latency: 8.33 ms

•

Weight:< 4 lbs

•

Acoustic noise:< 5.7 dB (seeking)

•

Minimum life expectancy: 5 years (80% POH)
--MTBF: > 40K POH (steady-state goal at FRS)
--MTTR: 1/2 hour (field)

•

Power requirements:
--Average power: 28 watts
--+5 volts: TBD A
--+ 12 volts: TBD A

The RF30 hard disk has three external connectors: a 50-pin DSSI connector (DEC PN 12-16832-03), a 4pin power connector (DEC PN 12-18855-00), and a 10-pin remote front-panel connector (DEC PN 1227247-02).
The remote front-panel interface supports the following:
•

DSSI bus ID (0-7)

•
•
•
•
•
•
•
•

Ready-status LED
Fault switch
Fault-status LED
~tjte-protect switch

Write-protect-status LED
Run/stop switch
Run/stop-status LED
Loopback signal

2.3.1. Workstation Packaging

December 29, 1987

Firefox System Specification 17

DIGITAL EQUIPME.1\1 CORPORATION -RESTRICTED DISTRIBLl'IO~

~
I

Figure 2·10:

RF30 Mechanical Illustration

18 Firefox System Specification

December 29, 1987

Workstation Packaging 2.3.1.

DIGITAL EQUIPME."i'T CORPORATION - RESTRlCTED DISTRlBL'TION

2.3.2. RF71 Hard Disk Unit

The RF71 hard disk unit. illustrated in Figure 2-11, has the following features:
•

Size: full-height 511.-inch Winchester disk

•

Media: non-operator-removable disks

•

Formatted capacity: 400 Mbytes

•

Transfer rate: 12.0 Mbits/sec

•

Seek time:
--Track to track: TBD ms
--Average:< 19.2 ms
--Maximum: < TBD ms

•

Average access time: 27.5 ms

•

Rotational latency: 8.33 ms

•

Weight: < 9 lbs

•

Acoustic noise:< TBD dB (seeking)

•

Minimum life expectancy: TBD years (TBD% POH)
--MTBF: > 35K POH (steady-state goal at FRS)
--MTI'R: 1 hour (field)
Power requirements:
--Average power: 38 watts
--+5 volts: TBD A
--+12 volts: TDD A

The RF70 hard disk has three external connectors: a 50-pin DSSI connector (DEC PN 12-16832-03), a 4pin power connector (DEC PN 12-18855-00), and a 10-pin remote front-panel connector (DEC PN 1227247-02).
The remote front-panel interface supports the following:
•

DSSI bus ID (0-7)

•
•
•
•
•
•
•
•

Ready-status LED
Fault switch
Fault-status LED
Write-protect switch
Write-protect-status LED
Run/stop switch
Run/stop-status LED
Loopback signal

2.3.2. Workstation Packaging

December 29, 1987

Firefox System Specification 19

DIGITALEQL1PME.NT CORPORATION-RESTRlCTED DISTRIBL!ION

Figure 2-11:

RF71 Mechanical Illustration

20 Firefox System Specification

December 29, 1987

Workstation Packaging 2.3.2.

DIGITAL EQUIPMThi CORPORATION -RESTRICTED DISTRIBUTION

2.3.3. TF30 Cartridge Tape Unit
The 1F30 cartridge tape unit is a TK50 with an imbedded DSSI controller. It can read and write TK50 cartridges. This tape unit has the following features:
•

Size: half-height 5 114-inch cartridge tape unit

•

Media: operator-removable 1/2-inch cartridge tapes

•

Formaned capacity: 95 Mbytes

• ::,

Transfer rate: 500 Kbits/sec

•

Recording density: 6.7K BPI

•

Weight:< TBD lbs

•

Acoustic noise: < TB D dB

•

Minimum life expectancy: TBD years (TBD% POH)
--MTBF: > 25K POH (steady-state goal at FRS)
--MTTR: 1 hour (field)

•

Power requirements:
--+5 volts: TBD A
--+12 volts: TBD A

The TF.30 cartridge tape has TBD external connectors.
2.3.4. TF70 Cartridge Tape Unit

The TF70 cartridge tape unit has the following features:
•

Sire: full-height 5 114-inch cartridge tape unit

•

Media: operator-removable V2-inch cartridge tapes

•

Formatted capacity: 296 Mbytes

•

Transfer rate: 1 :Mbits/sec

•

Recording density : 1OK BPI

•

Weight:< TBD lbs

•

Acoustic noise:< TBD dB

•

Minimum life expectancy: TBD yem (TBD% POH)
--MTBF: > TBD POH (steady-state goal at FRS)
--MTIR: TBD hour (field)

•

Power requirements:
--+5 volts: TBD A
--+12 volts: TBD A

The Tf7({ cartridge tape has TDD external connectors.

2.4. Workstation Packaging

December 29, 1987

Firefox System Specification 21

DIGITAL EQUIPMENT CORPORATION. RESTRlCTED DISTRIBL'TION

2.4. Monitor
Firefox uses the new VR295 monitor, which has the following basic features:
•

Resolution: 1280 x 1024 pixels

•

Size: 19-inch landscape orientation 338 mm x 270 mm

•

Refresh rate: 66 Hz, noninterlaced

•

RGB color

•

Pitch of 97 pixels/inch (.3lmm)

•

69-K.Hz horizontal frequency

•

114-MHz video bandwidth

The monitor will be an in-house design. It will have composite sync on green_
Inputs to the monitor are in the rear and are recessed in the cover. It has a tilt/swivel mechanism. During
installation, the only set-up adjustments needed are for brightness and contrast. The monitor will operate in
a usable fashion 30 seconds after tum-on.
The .MTBF of the monitor will be greater than 25,000 hours. MTIR of the monitor will be one hour maximum.

2.5. Keyboard
The corporate LK201 keyboard family will be used for Firefox if the LK.301 is not available. Main
features of the LK201 keyboard are the following:
•

Low profile and a detachable cord

•

105 keys in four groups: main keypad, editing keypad, numeric keypad, and function keys

•

Four status LEDs

•

International variants

•

Several modes of operation Wlder software control

•

Self-testing and self-identifying with respect to revision level (not with respect to language variant)

Each end of the keyboard cable terminates in a four-pin M:MJ connector. One end plugs into the keyboard,
the other into a matching four-pin female connector embedded in the molded conoector block at the end of
the video cable. The electrical interface is EIA RS-423, running at 4800 baud.
The wire assignments in the keyboard cable are shown in Table 2-15.
Table 2·15:

Keyboard Wire Aulgnments

Wire ·. Function
1
Receive data signal

Signal Level
EIA RS-423

2
3
4

+12 V (350 milliamperes maximum)
EIA RS-423

Power return/signal reference
Power input
Transmit data signal

22 Firefox System Specification

December 29, 198 7

Workstation Packaging 2.6.

DIGITAL EQUIPMENT CORPORATION -RESTRICTED DISTRIBL'TIO~

2.6. Mouse
The corporate-standard VSXX:X-AA mouse is used with Firefox. Its major features are the following:

•

Three buttons

•

Resolution: 200 counts/inch

•

Tracking speed: 30 inches/sec

•

Two electrical interfaces: RS-232 or TTL

•

Two operating modes: incremental or polling

•

Tracking rate: 55 reports/sec in incremental mode; up to 95 reports/sec in polling mode

•

Self-testing and self-identifying with respect to revision level

The 5-foot mouse cable is shielded and contains six conductors. It terminates into a male seven-pin
Micro-DIN-type connector that plugs into a seven-pin female connector embedded in the molded connector
block at the end of the video cable.
The signals on these connector pins are shown in Table 2-16.
Table 2-16:

Mouse Pin Signals

~-----------

Pin
1
2
3
4

5
6
7
Shell

- .

Signal
GND
TXD
RXD
GND/-12V
+5V

~~--~-·-······-~·····-··

Description
Signal and power return
Serial out from mouse
Serial in to mouse
TIL/RS-232
Power
Not used
Not used
Protective ground

The mouse communicates at 4800 baud. Each frame consists of one start bit, eight data bits, one parity bit
(odd), and one stop bit. Incoming parity and the most significant incoming data bit are ignored.
The mouse uses half-duplex communication If a byte is sent to the mouse while it is transmitting, the
mouse will abort the data being transmitted (force a break) and then process the new command immediately (except during self-test). If a byte is received between the characters of a multiple· byte report, the
mouse is still transmitting and will abort the current report.
In increment~ mode, the mouse reports at 55-Hz intervals anytime there is movement or a change in button
position since the last report. In polling mode, the mouse reports in response to a Request Position command. In both cases, the mouse report consists of a three-frame message that contains the current positions
of the ~e buttons and the X and Y displacements since the last report. The X and Y displacements are
measured in 1/200-incb units and are expressed as a signed 6-bit values.
The mouse can be insttucted to initiate a self-test At the conclusion of this test, it transmits a four.frame
message that indicates error status, hardware and firmware revision levels, and button status.

2. 7. Workstation Packaging

December 29, 1987

Firefox System Specification 23

DIGITAL EQUIPME.'1 CORPORATION - RESTRICTED DISTRIBUTION

2.7. Tablet
The corporate-standard VSXXX-AB tablet is used This is an optional component. If used, it replaces the
mouse. The tablet may be used with either a stylus or a puck. The major features of the tablet are the following:
•

Active area: 11 inches x 11 inches

•

Four-button puck and a two-button stylus

•

Resolution: 200 counts/inch

•

Electrical interface: RS-232, with settable rates of 4800 or 9600 baud

•

Two operating modes: incremental or polling

•

Tracking rate: settable at 55, 72. or 120 reports/sec for incremental mode; up to 50 reports/sec in
4800-baud polling mode; or up to 80 requests/sec in 9600-baud polling mode

•

Self-testing and self-identifying with respect to revision level and with respect to the fact that it is
not a mouse

The tablet cable is a 5-foot shielded cable containing four conductors. Llke the mouse. it terminates in a
seven-pin male Micro-DIN-type connector. This connector plugs into the same female connector as the
mouse cable, so only one can be in used at a time.
The signals on the pins are shown in Table 2-17.
Table 2-17:

Pin
1
2
3
4
5
6
7
Shell

Tablet Pin Signal•

Signal
GND
TXD
RXD

+12V

Description
Signal and power return
Serial out from tablet
Serial in to tablet
Not used
Not used
Power
Device present (connected to Pin 1)
Protective ground

In incremental mode, the tablet reports at the set rate any time there is a movement or a change in button
position since the last report. In polling mode, the tablet reports in response to a Request Position command. In both cases, the tablet-position report consists of a five-frame message that contains the current
positions ofany buttons, a proximity bit, and the X and Y positions. 1be X and Y displacements are measured in 1/200~inch units and are expressed as unsigned 12-bit values.
The tablet can be instructed to initiate a self-test. At the conclusion of the tes~ it transmits a four-frame
message that indicates error status, hardware and fi.Imware revision levels, and button status.

24 Firefox System Specification

December 29. 1987

Workstation Packaging 2.8.

DIGITAL EQUIPM&'41T CORPORATION - RESTRICTED DISTRIBUTION

2.8. Cables
Because of the design of the Fbox and the module covers, some standard cables cannot be used with Firefox. Firefox cables are described in Table 2-18.
Table 2-18:

Cables

Cable
Monitor/keyboard/mouse
Comm/modem
1bickWire Ethernet
1binWire Ethernet
Printer/console
Backplane to DSSI control panel
I/0 cover module to I/0 module

Status
New cable, specific to VR295
New cable, specific to Firefox
New cable, specific to Firefox
Standard cable with T-connector
Standard cable with MMJ connector
Standard to the BA213-series box
New cable, specific to Firefox

Part Number
17-01864-01
17-01862-01
17-01863-01
BC16T
BC16E
TBD
17-01861-01

2.8.1. Monitor/Keyboard/Mouse Cable

1bis cable is designed to be the unique interface between the Firefox system and the new VR295 monitor.
The length of the cable is 15 feet It ships with the Fiorefox system.
The cable is composed of three TBD coax (video) and ten strands of 30AWG wire (keyboard/mouse).
Each coax is individually shielded. The serial lines, along with the required power and ground, are
together in one shield. The three coax and the keyboard/mouse wires are molded together to form one
cable. The exact form is TBD.
At the system end, the coax breaks out to three 75-ohm BNCs and the keyboard/mouse wires attach to one
15-pin, female, right-angle D-sub connector. The three BNCs attach to the graphics cover assembly.
Because of their excellent signal integrity and FCC characteristics, 75-obm BNCs are used. The female Dsub connector attaches to the 15-pin male D-sub on the I/O cover assembly.

2.8. l. Workstation Packaging

December 29, 1987

Firefox System Specification 25

DIGIT AL EQCIP~R.Vf CORPORA TIO~ - RESTRICTED DISTRIBCTIO!'I

At the monitor end of the cable, there is a connector block. Three shielded coax with 75-ohm BNC connectors emerge from this block and plug into the back of the monitor. Figure 2-12 shows the connector block
mounted on the monitor, and the covered connector block is pictured in Figure 2-13.

?'-------~

Figure 2·12:

Uncovered Connector Block Mounted on the Monitor

Figure 2·13:

Covered Connector Block

26 Firefox System Specification

December 29, 1987

Workstation Packaging 2.8.1.

DIGITAL EQUIPMENT CORPORATION - RESTRICTED DISTRIBUTION

The connector block also contains a PC boa.rd that maps the keyboard/mouse wires to the appropriate
female modular connectors, one each for the keyboard and the mouse. The mapping for these wires is
shown in Table 2-19.
Table 2-19:

Mapping of Keyboard/Mouse Signals In the Connector Block

Keyboard/Mouse
D-Sub Connector
Pin Numbers
1, 8, 9, 15
2
3
4,5
6
7

13
14
10, 11, 12

Wire Color
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
No connection

Keyboard
Modular Connector
Pin Numbers
3
4
1
2

Mouse
Modular Connector
Pin Numbers
1

2
3
5
4

2.8.1.1. Keyboard/Mouse 0-Sub Connector

At the system end of the cable, the keyboard/mouse signals enter the cable through a 15-pin female D-sub
connector. The signal assignments are shown in Table 2-20.
Table 2·20:

Pin
1
2
3
4

5
6

8
9
10
11

12
13

Keyboard/Mou• Connector Signal Assignments

Signal
GND

KTX
KRX
+12V
+12V

:MRX
MTX
GND
GND
MFMDl
LED4
MFMDO

+5.3V

-:-~V

GND

Function
Keyboard ground
Keyboard transmitted data (to keyboard)
Keyboard received data (from keyboard)
Keyboard power
Tablet power
Mouse received data (from mouse)
Mouse transmitted data (to mouse)
Mouse ground
Keyboard power return
Manufacturing mode input
Most significant bit of status display output
Manufacturing mode input
Mouse power
Mouse power
Mouse power return

2.8.1.2. Workstation Packaging

December 29, 1987

Firefo:it System Specification 27

DIGITAL EQUIPMENT CORPORATION - RESTRICTED DISTRIBt.rrION

2.8.1.2. Keyboard Micro-DIN Connector

The corporate LK201 keyboard family is used for Firefox. Each end of the keyboard cable terminates in a
four-pin ~ connector. One end plugs into the keyboard and the other end into a matching four-pin
female connector embedded in the molded connector block at the end of the monitor/keyboard/mouse
cable. The pin assignments in this cable are shown in Table 2-21.
Table 2-21 :

Keyboard Signal Assignments

Signal

1
2

RX
GND
+12V
TX

3
4

Function
Receive data (serial-in to keyboard)
Signal ground
Power
Transmit data (serial-out from keyboanl)

2.8.1.3. Mouse Micro-DIN Connector

The corporate-standard VSXXX-AA mouse is used. Alternately, the corporate-standard VSXXX-AB
tablet is used (if used, it replaces the mouse). The 5-foot mouse cable is shielded and contains six conductors. The 5-foot tablet cable is shielded and contains four conductors. Both terminate into a male sevenpin Micro-DIN connector. This connector plugs into a seven-pin female connector embedded in the molded
connector block at the end of the monitor/keyboard/mouse cable. The signals on these connector pins are
shown in Table 2-22.
Table 2·22:

Pin
1
2

3
4
5
6

7
Shell

Mouse/Tablet Slgnal Assignments

Signal
GND
TXD
RXD
-12V
+SY
+12V

Description
Signal and power return
Serial out from mouse/tablet
Serial in to mouse/tablet
Only used by mouse
Only used by mouse
Only used by tablet
Device present. Not used
Protective ground

28 Firefox System Specification

December 29, 1987

Workstation Packaging 2.8.2.

DIGITAL EQUIPMENT CORPORATION - RESTRICTED DISTRIBt.rrION

2.8.2. Modem Cable

The modem cable has 25-pin D-sub connectors on each end. Its connections are the industry standard for
modem signals. At the system end, the cable has a female right-angle connector that causes this cable to be
unique to Firefox. It is similar to BC22E (17-00322). The length is TBD. This cable, which does not ship
with the Firefox system, is available as an option. The signals on the connector pins at the system end of
the modem cable (the end with the right-angle connector) are shown in Table 2-23.
Table 2-23:

Modem Cable Signal Assignments at the System End

Signal

1
2

3
4

5
6
7
8

TX
RX
RTS
CTS
DSR
GND
CD

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

SPD.MI

LLPBK
DTR
RI
DSRS
TMI

Function
Protective ground
Transmitted data
Received data
Request to send
Oear to send
Data-set ready
Signal ground
Carrier detect
:; nconnected
Unconnected
Unconnected
Speed-mode mdicator
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Local loopback
Unconnected
Data-tenninal ready
Unconnected
Ring indicator
Data-signaling rate select
Unconnected
Test-mode indicator

The connected signals go straight through the cable (i.e. pin 2 to pin 2).

2.8.3. Workstation Packaging

December 29. 1987

F~fox System Specification

DIGITAL EQUn>MENT CORPORATION - RESTRJCTED DISTRIBUTION

2.8.3. ThlckW1re Ethernet Cable

The ThickWire Ethernet cable is a standard cable with a 15-pin. male, right-angle connector at the system
end. It does not ship with the Firefox system. The signals on the connector pins at the system end are
shown in Table 2-24.
Table 2-24:

ThickWire Ethernet Signal Assignments at the System End

Signal

2
3
4

5
6

7
8
9
10
11
12
13
14
15

COL+
TX+
GND
RX+
GND
CTL+
GND
COLTXGND

RX+12V
GND
CTL-

Function
Shield
Collision presence
Transmit
Ground
Receive
Power return
Control output
Ground
Collision presence
Transmit
Ground
Receive
Power
Ground
Control output

2.8.4. ThlnWlre Ethernet Cable

The Thin Wire Ethernet cable is a standard cable with a T connector at the system end. The T connector
mates with a BNC connector on the l/O cover module. This cable does not ship with the Fuefox system.
2.8.5. Printer/Console Cable

The printer/console cable is a standard cable that is available is three variations. It does not ship with the
Firefox system. The types of printer/console cable are listed in Table 2-25.
Table 2-25:

Printer/Console Cable Part Numbers

Part Number
BC16E-10

Leqtb

BC16Er~

25 feet

BC16E-SO-

50 feet

10 feet

The pin assignments on the system end of the printer/console cable are as shown in Table 2-26.

30 Firefox System Specification

December 29, 1987

Workstation Packaging 2.8.S.

DIGITAL EQUIPMENI' CORPORATION - RESTRICTED DISTR!BlJTION

Table 2-26:

Prfnt.r/Console Cable Signal Assignments at the System End

Signal

Function

1
2

+5V
TX
GND
RX
GND
GND

Power
Transmit data
Transmit ground
Receive data
Receive ground
Power return

3
4
5
6

2.8.6. Backplane to DSSI Control Panel Cable

The backplane to DSSI control panel cable (BOSSI cable) contains power and ground for the DSSI control
panel. the BDCOK signal. the BPOK signal. and the BHALT signal. The goal is for this cable, which ships
with the Firefox system, to be the same as the standard Sbox BOSSI cable. The pin assigrunents for both
ends of this cable are shown in Table 2-27.
Table 2-27:

Pin
1
2
3
4
5
6

7
8

9
10

BOSSI Signal Assignments

Signal
+5V
+5V
SHALT
GND
GND
GND
BPOK
Spare
BDCOK
SRUN

2.8.7. 110 Cover Module to Workatatlon VO Module Cable

The I/0 cover module to workstation 1/0 mcxlule cable (I/O ribbon cable) contains the signals needed for
communication between the two mcxlules. They are power, ground, Ethernet, keyboard, mouse, modem,
printer/console, and system-status. The 1/0 ribbon cable is unique to Firefox, although the connectors and
twisted-ribbon cable are high-volume. industry-standard items. This cable is permanently attached to the
1/0 cover module. The pin assignments for both ends of this cable are shown in Table 2-28.

2.8.7. Workstation Packaging

December 29, 1987

Firefox. System Specification 31

DIGITAL EQUlPMENT CORPORATION - RESTRlCTED DISTRIBUTION

Table 2-28:

VO Ribbon Cable Slgnal Assignments

Signal

1
3
5
7
9
11

+12V
GND
TXO
CTS2
RTS2
TXl

13
15
17
19
21
23
25
27
29.
31
33
35
37
39
41
43
45
47
49

+12V
GND
RXO
GND
DTR2
RXl
GND

RI2
TX2
DSRS2
SPDMI2
TX3
+5V
LLPBK2
-12V
:MFMDO
LEDO
LED2
TX+
LED4
COL+
GND
RX+
GND
+12V

2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42

DSR2

46
48
50

32 Firefox System Specification

CD2
RX2

GND
TMI2
RX3
+5VBAT
GND
-12V
MFMDl

LEDl
LED3

TXSPARE
COLGND
RXGND
+12V

December 29, 1987

Workstation Packaging 2.8.7.