Digital PDFs

XX-750A8-DF

May 1981

50 pages

Original

2.5MB

Document:	DRS11 Option Description 198105
Order Number:	XX-750A8-DF
Revision:	000
Pages:	50
Original Filename:	http://bitsavers.org/pdf/dec/unibus/DRS11_Option_Description_198105.pdf

OCR Text

•

d Ig I t aI
•
•
dIg I t aI
•
•
dIg I t aI
•
•
dIg I t aI
•
•
dIg I t aI
•
•
dIg I t aI
•
•
dIg I t aI
DRSll/DSSll/DSPll
INPUT-OUTPUT SYSTEM
OPTION DESCRIPTION

digital
Computer Special Systems

NOTEBOOK SECTION
4.3-15

OPTION NUMBER

DRAWING SET NUMBER
DRSll-0
DSSll-0
DSPll-0

PROGRAM NUMBER
DECSPEC-11-BBBAD
DECSPEC-11-BBBAX

DOCUMENT NUMBER
CSS-MO-F-4.3-15

Q.lli

REVISION
C

DDDDDDD
DDDDDDD
DDDDDDD
DDDDDDD
DDDDDDD
DDDDDDD
DDDDDDD

MAY 1981

DRSll/DSSll/DSPll
INPUT-OUTPUT SYSTEM
OPTION DESCRIPTION

digital
Computer Special Systems

1st Printing November 1976
2nd Printing (Rev) March 1977
3rd Printing (Rev) August 1980
4th Printing (Rev) May 1981

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 which may appear in this manual.
Printed in U.S.A.

The following are trademarks of Digital Equipment
Corporation, Maynard, Massachusetts:

DECsystem-IO
DECSYSTEM-20
DECtape
DECwriter
DIBOL
Digital logo

IAS
MASSBUS
OMNIBUS
OS/8

PDP
PDT

RSTS
RSX
SBI
UNIBUS
VAX/VMS
VT

TABLE OF CONTENTS
1

INTRODUCTION • • • • • • • • • • • • • • • • • • • • • • •
General Description • • • • • • • • • • • • • • • ••
Specifications • • • • • • • • • • • • • • • • • • • •

INSTALLATION • • • • • •
Site Considerations

1.1
1.2
2. 1

2.2
2.3
2.3.1
2.3.2
2.4
2.4.1
2.4.2
2.5
2.5.1
2.5.2
2.6
2.6.1
2.6.2
2.6.3

2.7
2.8
2.9

1-1
1-1
1-2

.. .. .. .. .. .. . . . . . . . . . . . 2-1
2-1
Cables • • • . • • • . • • • . • • • • • • . • • • • • 2-1

Initial Operat1on • • • • • • • • • • • • • • • • • •
Module Jumpers • • • • • • • • • • • • • • • • • • •
Checkout Procedure • • • • • • • • • •
• • • • •
DRS11/DSS11 Connections • • • • • • • • • • • • • • •

2-1
2-1

2-2
2-2

•••••••••••••••••••••••
• • • • • • • • • • • • • • • • • • • • • • •

2-3

Wrap Arround Testing (Test 7) • • • • • • • • • • • •
DRS11-A or DRS11-B Looped with DSS11-A • • • • • • •
DRS11-B Looped With DSS11-B • • • • • • • • • • • •
DRS11-MP/DSS11-MP Cabling • • • • • • • • • • • • • •

2-4
2-4
2-5
2-5
2-5
2-6

DRS11
DSS 11

DRS11-MP • • • • • • • • • • • • • • • • • • • • • •

DRS11-MP Connected To DSS11-A/B (Test 7) • • • • • •
DSS 11-MP •

•

DSS11-MR/MS Cabling • • • • • • • • • • • • • • • • •
Acceptance Procedure • • • • • • • • • • • • • • • • •
Related Literature • • • • • • • • • • • • • • • • • •

2-3

2-7
2-8

2-9
2-9

OPERATION AND PROGAMMING • • • • • • • • • • • • • • • • •
3. 1
Controls • • . . . • . • . . • • • • . . • • . . . • .
3. 1 • 1
Toggle Switch • • • • • • • • • • • • • • • • • • •
3 .1.2
Ten Position DIP Swrtch • • • • • •
• •••••
Eight Position DIP Switch • • • • • • • • • • • • •
3 .1. 3
Interface Registers • • • • • • • • • • • • • • • • •
3.2
Control And Status Register (CSR) • • • • • • • • •
3.2.1
Bit 06, INT ENB (Interrupt Enable) • • • • • • • •
3.2.1.1
3.2.1.2
Bit 07, REQ (Request) • • • • • • • • • • • • • •
3.2.1.3
Bit 08, Request in Maintenance Mode • • • • • • •
3.2.2
DRS11 Output Registers • • • • • • • • • • • • • • •
3.2.3
DSS11 Input Registers • • • • • • • • • • • • • • •
Interrupt Programming • • • • • • • • • • • • • • • •
3.3
3.4
Programming Operation • • • • •
• • • • • • • • •

3-1
3-1
3-1
3-1
3-2
3-2
3-3
3-3
3-3
3-3

4
THEORY OF OPERATION • • • • • • • • • • • • • • • • • • • •
4.1
General Description • • • • • • • • • • • • • • • • •
4. 1. 1
Address Selection • • • • • • • • • • • • • • • • •
4. 1. 2
Bus Interrupt Control • • • • • • • • • • • • • • •
4.2
DRS11 Outputs • • • • • • • • • • • • • • • • • • • •
4.3
DSS11 Inputs • • • • • • • • • • • • • • • • • • • • •
4.4
DRS11-MP Output Signal Conditioning Module • • • • • •
4.5
DSS11-MP Input Contact Sense Conditioning Module • • •
4.6
DSS11-MR/HS Voltage Sense Conditioning Modules • • • •

4-1
4-1
4-1
4-1
4-4
4-4
4-5
4-5
4-6

5
5. 1
5.2

5.3
5.4

MAINTENANCE • • • • • • • • • •
General Description • • •
Preventive Maintenance • •
Diagnostic Testing • • • •
Quick Test Program • • • •

•
•
•
•
•

• • •
• • •
• • •
• • •
• • •

•
•
•
•
•

• • •
• • •
•••
• • •
• • •

• •
• •
• •
• •

3-3
3-5

3-6
3-6

5-1
5-1
5-1
5-1
5-2

6
6.1

CSS BUILT PARTS • • • • • • • • • • • • • • • • • • • • • •
CSS Parts • • • • • • • • • • • • • • • • • • • • • •

6-1
6-1

APPENDIX A SHIPPING/ACCESSORIES LIST
A.1
Equipment Furnished • • • • • • • • • • • • • • • • • •
A.2
Equipment Furnished (Cont.) • • • • • • • • • • • • • •
APPENDIX B DSP11 INTERCONNECT PANELS • • • • • • • • • • • • •
APPENDIX C CONNECTOR PINNING
C.1
General Description • • • • , • • • • • • • • • • • • •
C.2
DRS11-A/B • • • • • • • • • • • • • • • • • • • • • • •
C.3
DSS11-A/B • • • • • • • • • • • • • • • • • • • • • • •
C.4
DRS11-MP • • • • • • • • • • • • • • • • • • • • • • • •
C.5
DSS11-MP/MR/MS • • • • • • • • • • • • • • • • • • • • •

C-1
C-2
C-3
C-4
C-6

B.1
B.1.1
B.2
B.2.1

DSP11-A General Description • • • • • • • • • • • • •
DSP11-A Connections • • • • • • • • • • • • • • • •
DSP11-C General Description • • • • • • • • • • • • •
DSP11-C Connections • • • • • • • • • • • • • • • •

B-1
B-1
B-2
B-2

Typical DRS11/DSS11 Configuration • • • • • • • • • • •
DSS11-A Stand Alone Test 6 • • • • • • • • • • • • • •
DSS11-B Stand Alone Test 6 • • • • • • • • • • • • • •
DRS11-A/B Looped with DSS11-A • • • • • • • • • • • • •
DRS11-B Looped With DSS11-B • • • • • • • • • • • • • •
DRS11-MP Connected To User Equipment • • • • • • • • •
DRS11-MP To DSS11-A • • • • • • • • • • • • • • • • • •
DRS11-MP To DSS11-B • • • . • • • • • • • • • • • • • • •
Cabling For Test 6 Static Patterns • • • • • • • • • •
User Connections • • • • • • • • • • • • • • • • • • •
User Cabling Using DSS11-MR Or DSS11-MS • • • • • • • •
Static Pattern Test Cabling • • • • • • • • • • • • • •
Control And Status Register • • • • • • • • • • • • • •
First Data 'Register Out CRG1-DRS) • • • • • • • • • • •
Second Data Register Out (RG2-DRS) • • • • • • • • • •
Third Data Register Out (RG3-DRS) • • • • • • • • • • •
First Data Register In (RG1-DSS) • • • • • • • • • • •
Second Data Register In CRG2-DSS) • • • • • • • • • • •
Third Data Register In (RG3-DSS) • • • • • • • • • • •
DRS11-A/B Block Diagram • • • • • • • • • • • • • • • •
DSS11-A/B Block Diagram • • • • • • • • • • • • • • • •
Connector Edge View • • • • • • • • • • • • • • • • • •

1-1
2-3
2-4
2-4
2-5
2-5
2-6
2-6

Figures
1- 1

2- 1
2- 2
2- 3

2- 4
2- 5
2- 6
2- 7
2- 8
2- 9
2-10
2-11

3- 1
3- 2
3- 3
3- 4
3- 5
3- 6

3- 7

4- 1
4- 2
C-1

A-1
A-2
B-1

2-7

2-8
2-9
2-9
3-3
3-4
3-4
3-4
3-5
3-5
3-5
4-2
4-3
C-1

CHAPTER 1
INTRODUCTION

1.1

GENERAL DESCRIPTION

The DRS11/DSS11 input-output system, designed and manufactured by
the Digital Equipment Corporation, allows PDP-11 users to control
up to 48 digital inputs and 48 digital outputs.
Each output module can control up to 48 buffered outputs plus one
RC filtered interrupt input with either TTL or open collector
modules
can
be
characteristics.
Up to 16 DRS11 output
implemented in each system.
The input modules are the DSS11 series. Each DSS11 module allows
contact sense inputs or voltage sense inputs to be sent to the
PDP-11. Up to 48 input signals can be attached to each DSS11
controller module, and up to 16 DSS11 controllers can be used on
one system if desired. One interrupt input is also available on
each DSS11 module.
All DSS11 input signals are optically
isolated for system protection.
A typical DRS11/DSS11 system is shown in Figure 1-1.

UNIBUS

PDP-11

UNIBUS
OPTIONS

USER INPUTS

Figure 1-1

DSS11

D RS11

COND.

COND.
BD.

BO.

Typical DRS11/DSS11

USER
OUTPUTS

Configu~ation

Page 1-2
In addition to the I/O control modules, signal conditioning I/O
modules' can be ordered to satisify all system parameters. All
I/O control and signal conditioning modules are designed to
occupy small peripheral controller (SPC) slots in any POP-11 or
0011 panel. The signal conditioning modules that are currently
available are as follows:
1.
2.
3.
4.

DRS11-MP ••• 48 Optlically Isolated de Drivers
DSS11-MP ••• 48 Voltage Free Contact Sense Inputs
DSS11-MR ••• 48 Twenty-four Vdc Voltage Sense Inputs
DSS11-MS ••• 48 Forty-eight Vdc Voltage Sense Inputs

Also available are two interconnect panels (DSP11-A AND DSP11-C)
which allow easy user access to signals brought into the system's
control modules.

1.2

SPECIFICATIONS*

DIGITAL INPUTS (DSS11)
Description

Input Voltage Range
(ON state)
Input Current
Isolation Voltage
Prerequisite
Mounting
Unibus Loads
Amps @ +5V

DSS11-A
1'8 inputs (TTL)
plus one interrupt

DSS11-B
48 inputs (24Vdc)
plus one interrupt

4-7V
7-21mA
500V
PDP-11
1 SPC
one
1.6

24V+15S
16mi (nominal)
500V
PDP-11
1 SPC
one
1.6

INPUT SIGNAL CONDITIONING (DSS11-M)
Description

DSS11-MP
RC filtered
contact sense

DSS11-MR
RC filtered
voltage sense

DSS11-MS
RC filtered
voltage sense

RC Time Constant
Input Volt Range
(ON state)
Input Current
Contact Current

2ms(nominal)

24V+15S
user supplied
15mA(nominal)

24V+15j
13mA@24V

1'8V+10S
13mA@1'8V

* Specifica~ions are subject to change without notice.

Page 1-3
Prerequisite
Unibus Loads

DSS11-A
nor..?

DSS11-B
none

DSS11-A
none

DIGITAL OUTPUTS (DRS11)
DESCRIPTION

DRS11-A
!18 outputs plus
one interrupt

DRS11-B
48 outputs plus
one interrupt

Type Output
Output Voltage
Capability
(OFF state)
(ON state)
Output Current
Limitation
Prerequsite
Mounting
Unibus Loads
Amps @ +5V

TTL driver

open collector

TTL
compatible

30V max
• 7V @ 40mA

16mA @ .4V
PDP-11
1 SPC
one
2.5

40mA @ .7V
PDP-11
1 SPC
one
2.5

OUTPUT SIGNAL CONDITIONING (DRS11-HP)
Description

48 optically isolated de
drivers-one interrupt input

Type Output
Output Voltage
Capability
OFF state
ON state
Output Current
Limitation
Isolation Voltage
Prerequisite
Mounting
Unibus Loads
Amps @ +5V

open-collector
50V max
1.0V max @ 75mA
75mA@ 1.0V
500V max
DRS11-B
1 SPC slot next to DRS11-B
none
1.5

CHAPTER 2
INSTALLATION

2.1

SITE CONSIDERATIONS

The DRS11 and DSS11 modules are designed to occupy Small
Peripheral Controller (SPC) slots in any 0011, and as such have
the same environmental specifications as other PDP-11 module
options. When the optional signal conditioning modules are used,
space for them should be provided adjacent to the I/O control
modules.
The signal conditioning boards receive no signals from
the backplane in which they are inserted. They do ,however pass
on the Bus Grant signals in the same manner as the G727 Grant
Continuity card.

2.2

CABLES

Two test cables (7012989-01) and one test card (5412426) are
provided with the DSS11 option. In addition, each DRS11 and each
DSS11 option is shipped with two
10-foot
signal
cables
(7012989-10) to connect to user equipment.
A complete DRS11/DSS11 pin connector listing is given in Appendix
C of this manual.
Refer to this listing for pertinent hookup
procedures. Also, refer to Paragraphs 2.4 through 2.7 for
information concerning connections to customer equipment.

2.3

INITIAL OPERATION

2.3.1

Module Jumpers

The DRS11-A/B module has one hard-wired jumper (W1) that is used
to connect the DRS11 power supply GND to the power supply GND of
a DSS11-A when they are cabled for wraparound testing.
This
jumper should not be removed.

Page 2-2
The DSS11-A module has two hard-wire jumpers, W1 and W2.
These
jumpers supply +5Vdc and GND to the cable connectors. Ensure
that jumpers Wl and W2 are in place when no external power supply
is to be used for testing the DSS11-A.
NOTE
Never install jumpers Wl and W2
a DSS11-B option.

2.3.2

Checkout Procedure

Perform the set-up and
sequence.
Ensure that
proceed as follows:

checkout procedure in the following
the system power is turned OFF, and

1. Set the DIP switches on the control modules for
the address and vector desired (Paragraph 3.1).
2. Plug the desired priority jumper in the I/O control
modules.
3. With an ohm meter, check for +5V to GND shorts.
Proceed only when certain that none exist.
4. Insert the DRS11/DSS11 modules in the backplane.
5. Insert the signal conditioning modules, if used,
in the backplane.
6. Insert the required cables (see the following
paragraphs for the appropriate configuration).

7. Power-up the system and load the diagnostic
program (DECSPEC-11-BBBAD) as described in
the diagnostic write-up.

8. Run the diagnostic program for 15 error
free passes with switch 07 set to a one (up).

9. Run tests 6 and/or 7, if applicable, for 5 passes.
2.4

DRS11/DSS11 CONNECTIONS

This section deals only with DRS11/DSS11 module testing.
For
information pertaining to signal conditioning module testing,
refer to Paragraphs 2.6 through 2.7.

Page 2-3

NOTE
In Paragraphs 2.4 through 2.7, all
conections
between
I/O control
modules and signal
conditioning
modules are done using the test
cables
(7012989-01).
All
connections to user equipment are
shown using the 10-foot
signal
cable (7012989-10). In all cases,
the Test card is the DSS11 Test
Connector (5412426).

2.4.1

DRS11

The DRS11 module does not have any test plugs or
requirements when being run without a DSS11 module.

2.4.2

test

cable

DSS11

The DSS11 module when tested alone requires the test card and two
test cables to run Test 6 of the diagnostic.
The DSS11-A module must have the.two hard-wire jumpers (W1 and
W2) installed to run Test 6 of the diagnostic program. The cable
and test sockets are shown in Figure 2-1 for this test.

,.....,

l'""""I

r--

........

J2
DSS1f-A

..-

.__
J1

,__

.........

TEST CARD

Figure 2-1 DSS11-A Stand Alone Test 6
When a DSS11-B is to be tested, an external 24Vdc power
must be attached to the test card as shown Figure 2-2.

supply

Page 2-4
+24 voe
EXTERNAL GND

~--EXTERNAL

TEST CARD

DSSH-B

Figure 2-2 DSS11-B Stand Alone Test 6

2.5

WRAP ARROUND TESTING (TEST 7)

The wrap around test allows data from the DRS11 to be fed to the
DSS11 and read to determine if any bits are not operating
properly. The following diagrams (Figures 2-3 and 2-4) show the
proper test cable connections to run this test.

2.5.1

DRS11-A Or DRS11-B Looped With DSS11-A

The Wl and W2 jumpers on the DSS11-A module must be in place to
run this test and the W1 jumper on the DRS11-A/B module may be
left in place.

,........,

.......

...........

.........

,........,
I-'

DSSH-A

D
J2

TEST CARD

=~o
Ji

DRSl1-A/B

Figure 2-3 DRS11-A/B Looped With DSS11-A

Page 2-5
2.5.2

DRS11-B Looped With DSS11-B

To run this test, the external 24Vdc power supply must be
connected to the test sockets as shown in Figure 2-4. The W1
jumper must be removed from the DRS11-B.
EXTERNAL + 24 ADC
r-EXTERNAL GND

CJ
~

.....

._..

....
...... ._..

.....

Cl
,....,

,....

l""""'I

I-'

t-'

......

TEST .CARD

D.RS11-B

DSS11-B

Figure 2-4 DRS11-B Looped With DSS11-B

2.6
2.6.1

DRS11-MP/DSS11-MP CABLING
DRS11-MP

The DRS11-MP, when used in conjunction with the DRS11-B, is
hooked up in the following manner. Note that the outputs of the
signal conditioning module are not tested unless either a DSS11-A
or DSS11-B module is present. The outputs of the DRS11-MP can be
checked with an oscilloscope using a toggle in program such as
found in the Maintenance Chapter (Paragraph 5.4) of this manual,
however, it will be necessary to use an external load and power
supply connected to the outputs to see them change.
The connections for system use are shown in Figure 2-5.
This
method of hookup is also required for scope loop checking without
the DSS11-A/B available for wraparound.
.-----OUT H

DRS11-B

D
J2

OUT L
J1

DRS11- MP

Figure 2-5 DRS11-MP Connected To User Equipment

Page 2-6
2.6.2

DRS11-M/P Connected To DSS11-A/B (Test 7)

When a DRS11-MP module is to be tested in the wraparound mode as
in Test 1 of the diagnostic, the cabling must be as shown in
Figures 2-6 and 2-7.
TEST CARD

0
J2

DRS11-B

DRS11-MP

DSS11-A

Figure 2-6 DRS11-MP To DSS11-A
TEST CARD
EXTERNAL GND

EXTERNAL

+24

voe

D
J1

DRS11-B

DRS11-MP

DSS11-B

Figure 2-7 DRS11-MP To DSS11-B

Page 2-7
2.6.3

DSS11-MP

The DSS11-MP input signal conditioning module mounts in a Small
Peripheral Controller (SPC) slot next to the DSS11-B. The
external power for the DSS11-MP must be supplied by the user and
attaches to pin 50 of connector J1 or to the lug (P1) soldered to
the module near the connectors.
Figure 2-8 shows the wiring used to run the static patterns
(Test 6) of the diagnostic.

test

c::::J JI
EXTERNAL +24 voe

D
J1

J2 J4

DSS11-MP

DSS11-A

Figure 2-8 Cabling For Test 6 Static Patterns

NOTE
When using Test 6, the data is
inverted on the Unibus with the
DSS11-MP
module
in
place.
Therefore,
it
is necessary to
remove
the
test
socket
from
connector J2 only when asked to by
the program, and when told
to
replace the test sockets, replace
the test socket in connector J2.
The connections to the user equipment is as shown in Figure 2-9.

Page 2-8
----INPUT H
INPUT L

J4'

DSS11-MP

OSSH-A

Figure 2-9 User Connections

2.7

DSS11-HR/MS CABLING

The DSS11-HR and DSS11-HS differ only in the voltages used for
the inputs.
The cabling is the same for both versions although
the components differ.
User cabling for the DSS11-MR or DSS11-MS is shown in
2-10.
The cabling for the static pattern (Test 6
diagnostic) is shown in Figure 2-11.
NOTE

The DSS11-HR is used with a DSS11-A
and the 0511-MS is used with a
DSS11-B.
~---INPUT

.--INPUT L

....., ,....,
t--

1-.......

I.-'

..._

.......

......

J2 .J4

DSS-11-MR/MS

DSS11- A/8

Figure 2-10 User Cabling Using DSS11-MR or DSS11-MS

Figure
of the

Page 2-9
TEST

CARD

j _ r - - - - - - - - + - - - - EXTERNAL GND

LI l

er_ L

JJ2
l.___ _ __,__ __,
JJ1
EXTERNAL

rI-

1....1

I1....1

DSS11-MR/MS

Figure 2-11

2.8

..J.V

DSSt1-A/B

Static Pattern Test Cabling

ACCEPTANCE PROCEDURE

The acceptance procedure is similar to the Initial Operation
(Paragraph 2-3) the difference being that the system should
already be configured. Loading and running the diagnostic for 5
error free passes of the non-intervention tests (bit 07 set to a
one) and 5 passes of the wraparound tests ensures that the DRS11
and DSS11 are operating properly. The program when loaded will
do an automatic start and print operating instructions. See the
diagnostic write-up for a description of the required TTY inputs.
Lower all the switches of the switch register for normal
operation, type the responses, and the diagnostic will execute
tests 1 through 7. Running the diagnostic in this manner will
require the operator to change the cabling and jumpers each time
the wraparound test or Test 6 is run.
It is, therefore,
suggested that the tests be run in two groups as instructed above
to facilitate easier checkout.
If the DRS/DSS modules are included as a part of a system, it is
necessary to include a DECX/11 module for each DRS11 and for each
DSS11 following the procedures in the DECX/11 module write-up
(DECSPEC-11-BBBAX).

Page 2-10
2.9

RELATED LITERATURE
Title
Logic Handbook
PDP-11 Peripherals Handbook

Document Number
EB-07459-58
EB-17560-20

CHAPTER 3
OPERATION AND PROGAMMING

3.1

CONTROLS

Each DRS11 and DSS11 module is equipped with three switches,
toggle, a ten position DIP, and an eight position DIP.
function of these switches is to:

3.1.1

one
The

Enable the Maintenance Mode for testing purposes.

Set the device address of the registers on each option.

Set the Trap Vector address for each interrupt.

Toggle Switch

The toggle switch, mounted on each module, enables data bit 08 to
set the INTERUPT REQUEST flip-flop when Bit 08 is loaded into the
Control and Status register {CSR).
This feature allows the
diagnostic to generate interrupts without an external request.

3.1.2

Ten Position DIP Switch

The ten position DIP switch is used to set the device register
address.
Positions 1 through 10 correspond to address bits 03
through 12 of the PDP-11 word on the DSS11, and address bits
12-03 on the DRS11. To select the desired address, the switch is
put in the OFF position to signify a ONE in that bit position.
Therefore, if switches 10, 09, and 07 were in the OFF position,
the device address would be 775000 on the DSS11.

Page 3-2
3.1.3

Eight Position DIP Switch

The vector address of each module is selected with the eight
position DIP switch. To obtain the desired vector address, the
switch is put in the ON position to signify a ONE for that bit.
Switch positions 2 through 8 correspond to data bits 02 through
08 respectively. Therefore, if switches 08 and 05 were ON , the
corresponding
interrupt vector is 440.
Switch position 1
disables vector address bit 02 when it is in the ON position.

3.2

INTERFACE REGISTERS

The diagnostic program (DECSPEC-11-BBBAD) exercises control over
the system and obtains information via four registers on each of
the control modules:
DRS11
Control And Status Register ••••••••••••••• CSR-DRS
1ST Data Register Out • •••••••••••••••••••• RG1-DRS
2ND Data Register Out • •••••••••••••••••••• RG2-DRS
3RD Data Register Out • •••••••••••••••••••• RG3-DRS
DSS1 l
Control And Status Register ••••••••••••••• CSR-DSS
lST Data Register I,n ••••••••••••••••••••• RG1-DSS
2ND Data Register In ••••••••••••••••••••• RG2-DSS
3RD Data Register In ••••••••••••••••••••• RG3-DSS
These registers can be assigned Bus Addresses as desired using
the procedures outlined in Paragraph 3.1.
The CSR for each
module will represent the address chosen using the switches, with
the data registers being the next three sequential addresses.
For example, if the switches were set as previously described for
an address of 775000, this would be the CSR and the data
registers would be Unibus addresses 775002, 775004, 775006.
These
registers
can be read or loaded using the PDP-11
instructions which access their addresses.

Page 3-3
3.2.1

Control And Status Register (CSR)

The Control and Status registers for both the DRSll and DSS11 are
identical, and are organized as shown in Figure 3-1. The
significance of each CSR bit is discussed in the following
paragraphs.

76XXXO
10

09 0a 01 0s ~

04 03 02 01

READ
ONLY
WRITE
ONLY

Figure 3-1

READ I
WRITE

Control And Status Register

3.2.1.1 Bit 06, INT ENB (Interrupt Enable) - When
set,
this
read/write bit allows an interrupt when CSR Bit 07 (REQUEST) is
set. !NIT clears this bit.

3.2.1.2 Bit 07, REQ (Request) - This read only bit is set when
an external request occurs. An interrupt will occur if Bit 06 is
set when REQ becomes true. !NIT and any access to the CSR clears
this bit.

3.2.1.3 Bit 08, Request In Maintenance Mode - This write
only
bit is used when checking modules in Maintenance Mode. Setting
this bit simulates an external request whose function
is
identical to CSR Bit 07.

3.2.2

DRS11 Output Registers

Figures 3-2 through 3-4 show the DRS11 Output Registers format.

Page 3-4

76XXX2
15

14 13

</J9 08

07 06 05

04 03 02 01

READ/WRITE

Figure 3-2

First Data Register Out (RG1-DRS)

76XXX4
15

I I

' 1<1>

</)9

</)7 06 </)5- </J4 03

02 01

</J</J

I I I I I I I I I I I I
16

)

y
READ/WRITE

Figure 3-3

Second Data register Out (RG2-DRS)

76XXX6
15

14 13

09 0'8 ,</J7 </>6 05

04 03 02 01

I I I I I I I I I I 132 I
READ I WRITE .

Figure 3-4

Third Data Register Out (RG3-DRS)

Page 3-5
3.2.3

DSS11 Input Registers

Figures 3-5 through 3-7 show the DSS11 Input Register Format.

76XXX2
15

10 09

r/JB

r/J1 17}6 05 04 e'>3 02 01

I I

100 I

\...,_________________ __________________)
y
READ ONLY

Figure 3-5

First Data Register In (RG1-DSS)

76XXX4
15

131 I

09 08 r/)1 r/)6 05

I I I

r/)2 01

I I I
16

y --~--~~~~---)

READ ONLY

Figure 3-6

Second Data Register In (RG2-DSS)

76XXX6
15 14

I411

Figure 3-7

09 08 0.7 06 05 04 03 02 01

I I I I I I I I I I 1I
32

Third Data Register In (RG3-DSS)

Page 3-6
3.3

INTERRUPT PROGRAMMING

Both DRS/DSS modules contain the facilities to perform program
interrupts.
Because
the interrupt logic is identical, a
discussion of one will suffice for both. There are two ways for
DRS/DSS modules to generate interrupts.
1.

Set the REQUEST flip-flop via one of the External
Request Lines.

Set Bit 08 in the CSR when the Maintenance switch is in
the Enable position.

In either case the interrupt will be generated if the INTERRUPT
ENABLE flip-flop has been set by loading bit 06 of the CSR with a
one.
When the interrupt is generated, the device will trap to the
address specified by the VECTOR SELECTION switch as explained in
Paragraph 3.1.3.
The only way to clear the REQ flip-flop is to read the CSR or to
issue the bus INIT signal, therefore, this must be done each time
the module does an interrupt.
NOTE
The REQ flip-flop is read as Bit
07.
External
Request
or
Maintenance Bit 08 will set the REQ
flip-flop, and both are read as bit
07.

3.4

PROGRAMMING OPERATION

Programming for the DRS11 and DSS11 is very straight foward. The
DRS11 output bits are enabled to the user connections immediately
upon loading the data registers, and are enabled until cleared by
the program or a system Reset.

Page 3-7
The DSS11 inputs are available to be read by the program almost
immediatly after being set by the user equipment, but due to the
uncertain nature of switch contact bounce, and the long time
constant of the optional input signal conditioning modules, it is
suggested that these inputs be read only when the user external
interrupt is generated. This external interrupt should be used
by the user to signal when the data has settled.

CHAPTER 4
THEORY OF OPERATION

4.1

GENERAL DESCRIPTION

Since the bus control logic for the DRS11 and DSS11 is the same,
they will be explained together. Reference to the appropriate
module's prints and Figures 4-1 and
4-2
will
help
in
understanding the following discussion.
The print sets are
designated DRS11-0 for the DRS11 modules and the DRS11-MP signal
conditioning module.
The prints for the DSS11 and the three
signal conditioning modules (DSS11-MP/MR/MS) are
designated
DSS11-0.

4.1.1

Address Selection

The device selection address decoding is done using an Exclusive
OR function.
All of the address lines from the Unibus are
received and checked against the address selected for that
device.
To accomplish this, Bus Address bits <17:13> are ANDed
together as all of these bits must be present for a device
address.
Bus Address bits <12:03> are brought to one side of an
Exclusive OR gate, and if the address lines match the respective
switch setting for that line, then the output of the Exclusive OR
gate will be high. When all the incoming signals and the switch
settings match, all the outputs of the Exclusive OR gates will be
high. The AND condition of these outputs with BUS MSYN generates
the internal MSYN and BUS SSYN signals. The internal MSYN signal
and Bus Address bits <02:01> generate the signals necessary to
control the CSR and Data registers of the device.

4.1.2

Bus Interrupt Control

Both the DRS/DSS control modules utilize two methods to generate
interrupts.
Each module has the ability to generate interrupts
under program control if the TOGGLE switch on the module is in
the M-position.
When the switch is in the M-position, loading
Data bit 08 into the CSR will set the REQ flip-flop, generating
an interrupt if INT EN is set.

Page 4-2

(0 3:11) ADDRESS
-

XOR

BUS
CONTROL 1--

MSYN_

SSYN

,,
INST
DCDR

SEL
2,4,6_
..

1--

BUFFER
REG

(1e&</>tb)
;..
....

DATA
RCVRS

008

SEL

L-

OUTPUT
DRIVER

~·

,, ,,
INTR
.,.-_ _ _
_ _ _ _ _____, INTERRUPT
CONTROL

f4--EXT INT IN

, 7

Figure 4-1

DRS11-A/B Block Diagram

L-. DATA

r-- r:/)rbOUT

Page 4-3

)

(03:17)
ADDRESS
..;

XOR

MSYN_

BUS,
1-CONTROL

SSYN

]

N
I
B

A (00•02) -

u
s

~00 1 1~

DATA
XCVRS

SEL
INST
DCDR

2,4,6_
I--

008

INPUT
BUFFER

DATA

OPTICAL

14- ISOLATOR t4-- INPUTS
00-47

SEL 0

11 ,,

v
-

INTERRUPT
CONTROL

INTR

Figure 4-2

OPTOISOLATOR

DSS11-A/B Block Diagram

EXT
IN T
IN

Page 4-4
If the TOGGLE switch is in the N-position, then the REQ flip-flop
will be set by an external interrupt request. On the DRS11 when
the EX INT IN signal is grounded, the REQ flip-flop is set.
On
the DSS11 module, the interrupt inputs are INT IN H and INT IN L.
In this case, the INT IN H signal is brought to a level of +5Vdc
or +24Vdc depending on the version of the DSS11 used, and the INT
IN L signal is brought to ground.
This
turns
on
the
opto-isolator and in turn sets the REQ flip-flop.
When the REQ and INT EN flip-flops are both set, the bus
interrupt cycle is started and is executed in the same manner as
all other Unibus interrupt requests.
The address which is used as the trap vector is selected by the
eight-position DIP switch.
When the BUS INTR L signal is
generated, those lines for whial. the switch is closed will be
asserted on the bus.

4.2

DRS11 OUTPUTS

The DRS11 outputs are controlled by three registers.
These
registers are loaded from the Data bus by SEL 2 H, SEL 4 H, or
SEL 6 H. When the data is loaded into the registers, it is
presented to the output lines to be used in whatever manner
desired. On the DRS11-A , the output drivers are SN7404 gates
which are capable of TTL outputs with +5Vdc as the maximum level.
The DRS11-B is supplied with SN7406 Opeh Collector Drivers which
have greater drive and higher voltage threshold output levels.
These SN7406's are capable of levels to +30Vdc and currents up to
40mA.
The status of the output bits can be read back to the
doing a read of the respective address.

4.3

Unibus

DSS11 INPUTS

The DSS11 inputs are all optically isolated to provide system
protection from the external connection points. When the IN XX H
line is tied to an exterl source of +5Vdc or +24Vdc (depending on
the version of the DSS11) and the IN XXL line is tied to a
ground level, the LED in the optoisolator turns ON. This causes
the B XX L line to go to ground enabling the respective line in
the SN74153 chip. Now the data can be read onto the Unibus by
reading the appropriate register.

Page 4-5
4.4

DRS11-MP OUTPUT SIGNAL CONDITIONING MODULE

The DRS11-MP Output Siginal Conditioning module provides the
DRS11-B with a higher output drive capacity. The output current
can be a maximum 75mA and the output voltage can be up to 50Vdc.
This module is mounted next to the DRS11-B in a small peripheral
slot.
It does not use any of the backplane signals except for
+5Vdc and GND.
When the output driver of the DRS11-B is turned ON, the output
goes to ground. This turns ON the LED in the optoisolator of the
DRS11-MP signal conditioning card. When the LED is ON the output
transistor is also turned ON, thus causing the output of the
signal conditioning module to conduct from the OUT H output to
the OUT L line. Therefore, if the OUT L line was connected to
power supply ground, and the OUT H line was connected to a load
of which the other side was connected to the high side of the
power supply, when the transistor was turned ON, the external
power supply would be applied to the load.
There are 48 such circuits on the output signal conditioning
module, and all have separate two lead outputs, thus allowing
more than one voltage level to be switched by one DRS11-HP.
There is also one interrupt request line on the DRS11-MP.
This
line is opticaly isolated, and requires a TTL level input. If
desired, the user may change the value of the current limiting
resistor to allow other input levels of this signal.
When this module is used to switch inductive loads or relays, the
user is responsible for any overvoltage protection of the output
driver.
Refer to Appendix C for DRS11-MP connector pinning.

4.5

DSS11-MP INPUT CONTACT SENSE CONDITIONING MODULE

The DSS11-MP input signal conditioning module allows the DSS11-A
module to sense switch contact closures. The DSS11-MP provides
48 filtered RC inputs plus one RC filtered interrupt input.
The time constant of the input filters is about 2 milliseconds.
For this reason, the interrupt request input must be used to
signal when the data inputs are to be read by the computer, as
false readings may be encountered due to contact bounce.
The 24Vdc power for the switches is supplied by the user, and may
be wired to pin 50 of connector J1, or it may be applied to the
solder lug located on the edge of the DSS11-MP module.
Use of
the solder lug is recommended for external supplies except for
light loading of the module.

Page 4-6

NOTE
When using this module, the open
state of a switch is read on the
Unibus as a ONE and the closed
contacts are read as a ZERO.
Refer to Appendix C for DSS11-MP connector pinning.

4.6

DSS11-MR/MS VOLTAGE SENSE CONDITIONING MODULES

The DSS11-MR provides 48 RC filtered data inputs for 24Vdc
signals and one interrupt request input. The DSS11-MS provides
the same RC filtered inputs except for the input levels which are
48Vdc.
When a contact is open, the input opto-isolato~ of the DSS11-A/B
is turned OFF, and the data on the Unibus will be read as a ZERO.
When the contact is closed, the data on the Unibus will be read
as a ONE.
The time constant of the RC filters is about 2 milliseconds. For
this reason the interrupt request line should be used to signal
when valid data is avalilable to be read.
The 24 or 48Vdc power must be supplied by the user with the
negative sid•· of the supply connected to the INPUT L line of the
signal conditioning module line, and the high side of the input
signal connected to the INPUT H line.
The DSS11-A is used with the DSS11-MR, and a DSS11-B must be used
with the DSS11-MS.
Refer to Appendix C for DSS11-MR/MS connector pinning.

CHAPTER 5
MAINTENANCE

5.1

GENERAL DESCRIPTION

Maintenance of the DRS/DSS11 option conforms to the accepted
maintenance procedures for electronic equipment presently in use;
i.e., ample preventive procedures performed on a routine schedule
can forecast failures before they occur. If a specific item does
fail, the design of the equipment allows for quick replacement of
modular elements of the complete package. One of the design
objectives was to provide a dependable and relatively maintenance
free assembly.

5.2

PREVENTIVE MAINTENANCE

Preventive maintenance consists of tasks performed at periodic
intervals to ensure proper equipment operation and m1n1mum
unscheduled downtime. These tasks include visual inspection and
replacement of marginal components.
The preventive maintenance schedule depends on the operating
environment and conditions at the installation site. Under
normal conditions, the
recommended
preventive
maintenance
schedule consists of inspection and cleaning every 600 hours of
operation or every four months, whichever occurs first.

5.3

DIAGNOSTIC TESTING

If a system failure is suspected, the diagnostic can be run
following the procedures in the diagnostic writeup.
It is
necessary to remove the user equipment to run these tests.
This
is simply facilitated by disconnecting the "BERG" type connectors
on the modules.
It is also very easy to do a static check of the DRS11 modules by
depositing data into the output registers from the PDP•11
console, and then reading the data to see if it agrees. Checking
the DSS11 inputs is also possible using this method provided the

Page 5-2
DRS11 module is hooked up as described in Paragraph 2.5
manual for Wraparound Testing.

5.4

this

QUICK TEST PROGRAM

The following toggle in program can be used to do a quick check
of the DRS11 or DSS11 if a problem is encountered while running
the diagnostic. This program allows the operator to send bits
contained in the Switch register to the Data register selected so
that the suspected bit that is failing may be checked in a tight
scope loop.
The address of the module under test must be put in the program
where the XXXX is shown in the following listing. If desired,
the DSS11 may also be checked using this program (if a DRS11 is
present) by using the wrap around cabling as described in
Paragraph 2.5 for the particular setup that is under test.
TEST PROGRAM
1$: MOV 177570,@REG
BR 1$
REG: 76XXXX
END
This may be deposited anywhere in memory.
like this:

At 1000 it would

1000:
1002:
1004:
1006:
1010:
Where the address of the DRS11
76XXXX is shown.

look

013777
177570
000002
000774
76XXXX
put

where

the

CHAPTER 6
CSS BUILT PARTS

6.1

CSS PARTS

The following equipment is available from the Computer
Systems group , and must be supplied through them.
DGITIAL P/N
M7893-YA/YB
M7894
M7895-YA/YB
M7896-YA/YC/YD
7012989
7012990

Description
DRS11 Module
DRS11-MR Module
DSS11 Module
DSS11 Signal Conditioning Module
Cables
DSS11 Test Plug

Special

APPENDIX A
SHIPPING/ACCESSORIES LIST

A.1

EQUIPMENT FURNISHED

QUANTITY /VARIATION

DIGITAL EQUIPMENT CORPORATION
MAYNARD, MASSACHUSETTS

SHIPPING LIST
ITEM

NO.

DWG NO./ PART NO.

DESCRIPTION

M7893-YA
M7893-YB

DRSll-A Module
DRSll-B Module

M7894

DRSll-MP Module

M7895-YA

DSSll-A Module

5
6

M7895-YB
M7896-YA

DSSll-B Module
DSSll-MP Module

7
8

M7896-YC
M7896-YD

DSSll-MR Module
DSSll-MS Module

70-12989-01

50 Pin Interconnect Cable

10
11
12

70-12989-10
54-12426-0
DSPll-A

50 Pin Interconnect Cable
DSSll Test Connector
DSPll-A Panel

54-12502-0-0

Connector Module

DSPll-C

DSPll-C Panel

TITLE

Ill

§: <
I

I
.-1
.-1
Ul

.-1
.-1
Ul
Ul
Q

Ill

I
.-1
.-1
Ul
Ul
Q

:E:

I
.-1
.-1
Ul
Ul
Q

:E:

I
.-1
.-1
Ul
Ul
Q

gj < u
I
I

I
.-1

.-1

.-1
Cll

.-1
A.

.-1
.-1
A.
Ul
Q

The following hardware will ship per
option:

1
2

t--~

I
.-1
.-1
Ul

DRSll/DSSll/DSPll INPUT-OUTPUT SYSTEM

- - - - - 1 - - - - 1 - .. - - 1
- - - - 1- - 1- - - - - - - - 2 2 2
2 2 - 2 2
- - - 1 1
- - - - - - - - - - - - 1

- -

DOCUMENT NUMBER

CSS-MO-F-4.3-15

- - - - - - - - - - - - - - - - - - - - - - - - 1 - - - - 1 - -

- - - - -

- - - 1

- 2 - - 1

REV.

Page A-2

EQUIPMENT FURNISHED (CONT.)

A.2

QUANTITY /VARIATION

DIGITAL EQUIPMENT CORPORATION

Ill

MAYNARD, MASSACHUSETTS

SHIPPING LIST
ITEM
NO.

DWG NO./ PART NO.

f f
8 ...............
'tl

DESCRIPTION

....
Ill

.....

..... .....

p.,
Ill

Ill
~

Ill
Ill

One standard Document Pack~e will be
provided with each shipment; an additional standard Document Package will ship
with each additional five~~b=a=s~i~c~m=o~d~u~l~e~s::._~1---+~+--+~-l--l-~+---l-~l---l---l~-+---I
(DRS/DSSll-A,B)
1
DECSPEC-11-BBBAD
2 ' DECSPEC-11-BBBAD

Diagnostic Listing
Diagnostic Tape

3
4

DEC/X-11-Module Listing
DEC/X-11-Module Tape

1
1

-: - -

DRSll Print Set
DSSll Print Set

1
1

~-~~--~~~~--~-+---=-~~~~=--~~~~~~~~~~~~u--+~+--+~r--+~1---+~1---+--~~-r--;

5
6

DECSPEC-11-BBBAX
DECSPEC-11-BBBAX
B-DD-DRSll-0-0
B-DD-DSSll-0-0

l
-

~~---D_D_-_D_s_P_1_1_-A~~~---1~D_S_P_l_1_-._~_P_i_·i_n__t~G_e_t~--~~~~~~~~~~~-1-+-_1+---+---+~-1--+~+--+~t--+-~t--~
8

B-DD-DSPll-C

DSPll-C Print Set

CSS-MO-F-4.3-15

DRSll/DSSll/DSPll QE_tion Descr!E.tion

TITLE

·~~~~~~--1--~~~~~~~~~~~~~~~~~~~~--l~+--+~-t--~~+--+~+--+~t---+---I

DOCUMENT NUMBER

DRSll/DSSll/DSPll INPUT-OUTPUT SYSTEM

CSS-MO-F-4.3-15

REV.

APPENDIX B
DSP11 INTERCONNECT PANELS

B.1

DSP11-A GENERAL DESCRIPTION

The DSP11-A panel provides the user with a convenient means for
connecting the DRS11 or DSS11 family of modules to his equipment.
The panel consists of 200 screw terminals to allow 100 double
ended signals to be connected to the control modules.
The 10-foot signal cable (7012989-10) is plugged from the module
to the DSP11-A panel, and all user connections are made to the
screw terminals.
The DSP11-A is a rack mountable panel that measures 5.25 inches
in height and approximately 3.5 inches in depth. The panel
consists of two identical rows of connector blocks to which the
user makes all of his connections. The following paragraph lists
only the connections for one half of the panel (one row).
The
other half of the panel is identical.

B.1.1

DSP11-A CONNECTIONS

The cable from the module (M7893-M7896) is attached to one of the
"BERG" connectors on the DSP11-A so that the pinning of the
module connector is carried to the screw terminals on the front
of the DSP11-A.
In other words pin 1 on the module is now
connected to screw terminal 1 etc. The top row of screws are
connected to connector J1 on the DSP11 module and the lower row
of screw terminals on the blocks is connected to J2.
For the
sake of consistency, the active signal lines from the modules
should be brought to J1. The return lines should be connected to
J2 on the DSP11-A.

DSP11 INTERCONNECT PANELS
B.2

Page B-2

DSP11-C GENERAL DESCRIPTION

The DSP11-C panel provides the user with a convenient means of
connecting the DRS11 or DSS11 family of modules to his equipment.
The panel consists of four fifty pin female
micro-ribbon
"telephone" type connectors with attached ten foot cables.
The 5.25 inch high panel can be rack mounted in the cabinet such
that the tenfoot signal cables will attach to the appropriate
DRS/DSS modules with enough slack to permit the mounting box to
be fully extended from the cabinet.

B.2.1

DSP11-C Connections

Each of the four connectors (J1-J4} on the DSP11-C panel are
identical.
In a typical application, J1 would be the signal
cable and J2 the return cable for one DRS11 or DSS11 module.
J3
and J4 would be used for a second DRS11 or DSS11.
The pinout of the connectors does not follow the numbered outputs
of the DRS/DSS11 modules.
Pins 1-25 do correspond to outputs
1-25, but pins 26-50 correspond to signals 50-26 respectively.
Refer to Appendix C for full definition of all DRS/DSS11 module
outputs.

APPENDIX C
CONNECTOR PINNING

C.1

GENERAL DESCRIPTION

The following pages list the signal pins for the entire DRS/DSS
family of modules. Refer to these to determine the user cabling
to the external equipment.
NOTE
The
pinning
of
all
50-pin
connectors are as shown in Figure
C-1, and NOT as indicated on the
connector-rtself.

Figure C-1

Connector Edge View

Page C-2
C.2

DRS11-A/B
CONNECTOR Jl
SIGNAL NAME PIN NUMBER
OUT 00
01
OUT 01
02
OUT 02
03
OUT 03
04
OUT 04
05
OUT 05
06
OUT 06
07
OUT 07
08
OUT 08
09
OUT 09
10
OUT 10
11
OUT 11
12
OUT 12
13
OUT 13
14
OUT 14
15
OUT 15
16
OUT 16
17
OUT 17
18
OUT 18
19
OUT 19
20
OUT 20
21
OUT 21
22
OUT 22
23
OUT 23
24
OUT 24
25
OUT 25
26
OUT 26
27
OUT 27
28
OUT 28
29
OUT 29
30
OUT 30
31
OUT 31
32
OUT 32
33
OUT 33
34
OUT 34
35
OUT 35
36
OUT 36
37
OUT 37
38
OUT 38
39
OUT 39
40
OUT 40
41
OUT 41
42
OUT 42
43
OUT 43
44
OUT 44
45
OUT 45
46
OUT 46
47
OUT 47
48
EX INT IN
49
GND
50

CONNECTOR J2
SIGNAL NAME PIN NUMBER
GND
01
GND
02
GND
03
GND
04
GND
05
GND
06
GND
07
GND
08
GND
09
GND
10
GND
11
GND
12
GND
13
GND
14
GND
15
GND
16
GND
17
GND
18
GND
19
GND
20
GND
21
GND
22
GND
23
GND
24
GND
25
GND
26
GND
27
GND
28
GND
29
GND
30
GND
31
GND
32
GND
33
GND
34
GND
35
GND
36
GND
37
GND
38
GND
39
GND
40
GND
41
GND
42
GND
43'
GND
44
GND
45
GND
46
GND
46
GND
48
GND
49
GND
50

Page C-3

c.3

DSS11-A/B
CONNECTOR J1
SIGNAL NAME PIN NUMBER
01
IN 00 H
02
IN 01 H
IN 02 H
03
04
IN 03 H
IN 04 H
05
IN 05 H
06
IN 06 H
07
IN 07 H
08
IN 08 H
09
IN 09 H
10
IN 10 H
11
IN 11 H
12
IN 12 H
13
IN 13 H
14
IN 14 H
15
IN 15 H
16
IN 16 H
17
IN 17 H
18
IN 18 H
19
IN 19 H
20
IN 20 H
21
IN 21 H
22
IN 22 H
23
IN 23 H
24
IN 24 H
25
IN 25 H
26
IN 26 H
21
IN 27 H
28
IN 28 H
29
IN 29 H
30
IN 30 H
31
IN 31 H
32
IN 32 H
33
IN 33 H
34
IN 34 H
35
IN 35 H
36
IN 36 H
37
IN 37 H
38
IN 38 H
39
IN 39 H
40
IN 40 H
41
42
IN 41 H
IN 42 H
43
44
IN 43 H
IN 44 H
45
IN 45 H
46
IN 46 H
47
48
IN 47 H·
INT IN H
49
PWR TST
50

CONNECTOR J2
SIGNAL NAME PIN NUMBER
IN 00 L
01
IN 01 L
02
IN 02 L
03
04
IN 03 L
IN 04 L
05
06
IN 05 L
IN 06 L
07
IN 07 L
08
IN 08 L
09
IN 09 L
10
IN 10 L
11
IN 11 L
12
IN 12 L
13
14
IN 13 L
IN 14 L
15
IN 15 L
16
IN 16 L
17
IN 17 L
18
IN 18 L
19
20
IN 19 L
IN 20 L
21
IN 21 L
22
IN 22 L
23
24
IN 23 L
IN 24 L
25
IN 25 L
26
IN 26 L
27
IN 27 L
28
IN 28 L
29
IN 29 L
30
IN 30 L
31
IN 31 L
32
IN 32 L
33
IN 33 L
34
IN 34 L
35
· IN 35 L
36
IN 36 L
37
IN 37 L
38
IN 38 L
39
40
IN 39 L
IN 40 L
41
IN 41 L
42
IN 42 L
43
44
IN 43 L
IN 44 L
45
IN 45 L
46
IN 46 L
47
IN 47 L
48
INT IN L
49
PWR TST
50

Page C-4
C.4

DRS11-HP

CONNECTOR J1
SIGNAL NAME PIN NUMBER
IN 00 L
01
IN 01 L
02
IN 02 L
03
04
IN 03 L
IN 04 L
05
IN 05 L
06
IN 06 L
07
IN 07 L
08
IN 08 L
09
10
IN 09 L
IN 10 L
11
IN 11 L
12
IN 12 L
13
14
IN 13 L
IN 14 L
15
IN 15 L
16
IN 16 L
17
IN 17 L
18
IN 18 L
19
IN 19 L
20
IN 20 L
21
IN 21 L
22
IN 22 L
23
24
IN 23 L
IN 24 L
25
IN 25 L
26
IN 26 L
27
IN 27 L
28
IN 28 L
29
IN 29 L
30
IN 30 L
31
IN 31 L
32
IN 32 L
33
IN 33 L
34
IN 34 L
35
IN 35 L
36
IN 36 L
37
IN 37 L
38
IN 38 L
39
40
IN 39 L
IN 40 L
41
IN 41 L
42
IN 42 L
43
IN 43 L
44
IN 44 L
45
IN 45 L
46
IN 46 L
47
IN 47 L
48
REQ LINE
49
50

Page C-5
DRS11-MP (cont.)
CONNECTOR J2
SIGNAL NAME PIN NUMBER
OUT 00 H
01
OUT 01 H
02
OUT 02 H
03
OUT 03 H
04
OUT 04 H
05
OUT 05 H
06
OUT 06 H
07
OUT 07 H
08
OUT 08 H
09
OUT 09 H
10
OUT 10 H
11
OUT 11 H
12
OUT 12 H
13
OUT 13 H
14
OUT 14 H
15
OUT 15 H
16
OUT 16 H
17
OUT 17 H
18
OUT 18 H
19
OUT 19 H
20
OUT 20 H
21
OUT 21 H
22
OUT 22 H
23
OUT 23 H
24
OUT 24 H
25
OUT 25 H
26
OUT 26 H
27
OUT 27 H
28
OUT 28 H
29
OUT 29 H
30
OUT 30 H
31
OUT 31 H
32
OUT 32 H
33
OUT 33 H
34
OUT 34 H
35
OUT 35 H
36
OUT 36 H
37
OUT 37 H
38
OUT 38 H
39
OUT 39 H
40
OUT 40 H
41
OUT 41 H
42
OUT 42 H
43
OUT 43 H
44
OUT 44 H
45
OUT 45 H
46
OUT 46 H
47
OUT 47 H
48
INT IN H
49
50

CONNECTOR J3
SIGNAL NAME PIN NUMBER
OUT 00 L
01
OUT 01 L
02
OUT 02 L
03
OUT 03 L
04
OUT 04 L
05
OUT 05 L
06
OUT 06 L
07
OUT 07 L
08
OUT 08 L
09
OUT 09 L
10
OUT 10 L
11
OUT 11 L
12
OUT 12 L
13
OUT 13 L
14
OUT 14 L
15
OUT 15 L
16
OUT 16 L
17
OUT 17 L
18
OUT 18 L
19
OUT 19 L
20
OUT 20 L
21
.OUT 21 L
22
OUT 22 L
23
OUT 23 L
24
OUT 24 L
25
OUT 25 L
26
OUT 26 L
27
OUT 27 L
28
OUT 28 L
29
OUT 29 L
30
OUT 30 L
31
OUT 31 L
32
OUT 32 L
33
OUT 33 L
34
OUT 34 L
35
OUT 35 L
36
OUT 36 L
37
OUT 37 L
38
OUT 38 L
39
OUT 39 L
40
OUT 40 L
41
OUT 41 L
42
OUT 42 L
43
OUT 43 L
44
OUT 44 L
45
OUT 45 L
46
OUT 46 L
47
OUT 47 L
48
INT IN L
49
GND
50

Page C-6

C.5

DSS11-MP/MR/MS
CONNECTOR J1
SIGNAL NAME PIN NUMBER
IN 00 H
01
IN 01 H
02
IN 02 H ·
03
IN 03 H
04
IN 04 H
05
IN 05 H
06
IN 06 H
07
IN 07 H
08
IN .08 H
. 09
IN 09 H
10
IN 10 H
11
IN 11 H
12
IN 12 H
13
IN 13 H
14
IN 14 H
15
IN 15 H
16
IN 16 H
17
IN 17 H
18
IN 18 H
19
IN 19 H
20
IN 20 H
21
IN 21 H
22
IN 22 H
23
IN 23 H
24
IN 24 H
25
IN 25 H
26
IN 26 H
27
IN 27 H
28
IN 28 H
29
IN 29 H
30
IN 30 H
31
IN 31 H
32
IN 32 H
33
IN 33 H
34
IN 34 H
35
IN 35 H ·
36
IN 36 H
37
IN 37 H
38
IN 38 H
39
IN 39 H
40
IN 40 H
41
IN 41 H
1'2
IN 42 H
43
IN 1'3 H
qq
IN 44 H
1'5
IN 1'5 H
46
IN 46 H
47
IN 47 H
1'8
REQ IN H
1'9
PWR TST
50

CONNECTOR J2
SIGNAL NAME PIN NUMBER
IN 00 L
01
IN 01 L
02
IN 02 L
03
04
IN 03 L
IN 04 L
05
IN 05 L
06
IN 06 L
07
IN 07 L
08
IN 08 L
09
IN 09 L
10
IN 10 L
11
IN 11 L
12
IN 12 L
13
14
IN 13 L
IN 14 L
15
IN 15 L
16
IN 16 L
17
IN 17 L
18
IN 18 L
19
IN 19 L
20
IN 20 L
21
IN 21 L
22
IN 22 L
23
24
IN 23 L
IN 24 L
25
IN 25 L
26
IN 26 L
27
IN 27 L
28
IN 28 L
29
IN 29 L
30
IN 30 L
31
IN 31 L
32
IN 32 L
33
IN 33 L
34
IN 34 L
35
IN 35 L
36
IN 36 L
37
IN 37 L
38
IN 38 L
39
40
IN 39 L
IN !JO L
41
IN 41 L
42
IN 42 L
43
44
IN 1'3 L
IN 44 L
45
IN 45 L
46
IN 46 L
47
IN 47 L
48
REQ IN L
49
PWR TST
50

Page C-7
DSS11-MP/MR/MS

(cont}

CONNECTOR J3
SIGNAL NAME PIN NUMBER
OUT 00 H
01
OUT 01 H
02
OUT 02 H
03
OUT 03 H
04
OUT 04 H
05
OUT 05 H
06
OUT 06 H
07
OUT 07 H
08
OUT 08 H
09
OUT 09 H
10
OUT 10 H
11
OUT 11 H
12
OUT 12 H
13
OUT 13 H
14
OUT 14 H
15
OUT 15 H
16
OUT 16 H
17
OUT 17 H
18
OUT 18 H
19
OUT 19 H
20
OUT 20 H
21
OUT 21 H
22
OUT 22 H
23
OUT 23 H
24
OUT 24 H
25
OUT 25 H
26
OUT 26 H
27
OUT 27 H
28
OUT 28 H
29
OUT 29 H
30
OUT 30 H
31
OUT 31 H
32
OUT 32 H
33
OUT 33 H
34
OUT 34 H
35
OUT 35 H
36
OUT 36 H
37
OUT 37 H
38
OUT 38 H
39
OUT 39 H
40
OUT 40 H
41
OUT 41 H
42
OUT 42 H
43
OUT 43 H
44
OUT 44 H
45
OUT 45 H
46
OUT 46 H
47
OUT 47 H
48
INT IN H
49
50

CONNECTOR J4
SIGNAL NAME PIN NUMBER
01
OUT 00 L
OUT 01 L
02
OUT 02 L
03
04
OUT 03 L
OUT 04 L
05
OUT 05 L
06
OUT 06 L
07
OUT 07 L
08
OUT 08 L
09
10
OUT 09 L
OUT 10 L
11
OUT 11 L
12
OUT 12 L
13
14
OUT 13 L
OUT 14 L
15
OUT 15 L
16
OUT 16 L
17
OUT 17 L
18
OUT 18 L
19
20
OUT 19 L
OUT 20 L
21
OUT 21 L
22
OUT 22 L
23
24
OUT 23 L
OUT 24 L
25
OUT 25 L
26
OUT 26 L
21
OUT 27 L
28
OUT 28 L
29
OUT 29 L
30
OUT 30 L
31
OUT 31 L
32
OUT 32 L
33
OUT 33 L
34
OUT 34 L
35
OUT 35 L
36
OUT 36 L
37
OUT 37 L
38
OUT 38 L
39
40
OUT 39 L
OUT 40 L
41
OUT 41 L
42
OUT 42 L
43
OUT 43 L
44
OUT 44 L
45
OUT 45 L
46
OUT 46 L
47
OUT 47 L
48
INT IN L
49
50

~nmnomo

Computer Special Systems
printed in U.S.A;