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PET index - pinouts

Here is a description of some pinouts of the PET connectors. Most (i.e. all so far!) are from the 8296 addendum in the petio text typed in by Olaf Seibert (Many thanks!):

I have also gotten hold of a copy of the 8296 addendum and added some scans of the original pages.

For the layouts please see keyboards.html

80xx separate keyboard 25 pin D-Sub connector

          KEYBOARD
          ========

          PLease note that the original documentation in the 8296 addendum
          is incorrect. Here you can see the incorrect original documentation,
          and here is the relevant part of the schematics.

          +-----+--------+
          | PIN | SIGNAL |
          +-----+--------+
          |  1  | DEC 0  |
          |  2  | |   1  |
          |  3  | |   2  |
          |  4  | |   3  |
          |  5  | |   4  |
          |  6  | |   5  |
          |  7  | |   6  |
          |  8  | |   7  |
          |  9  | |   8  |
          | 10  | V   9  |
          | 11  | N.C.   |
          | 12  | GND    |  13                       1
          | 13  | N.C.   | +---------------------------+
          | 14  | KIN 0  | | o o o o o o o o o o o o o |
          | 15  | |   1  | \  o o o o o o o o o o o o /
          | 16  | |   2  |  --------------------------
          | 17  | |   3  |    25                    14
          | 18  | |   4  |
          | 19  | |   5  |
          | 20  | |   6  |
          | 21  | V   7  |
          | 22  | N.C.   |
          | 23  | N.C.   |
          | 24  | N.C.   |
          | 25  | N.C.   |
          +-----+--------+

I/O - IEEE488, Tape and Userport

As far as I know those connectors were the same for all the PETs, but you never know...

IEEE                                   USER - PORT
====                                   ===========

Arrangement of pins  plug J1/J12       Arrangement of pins  plug   J2

+-----+-------------+-----+--------+   +-----+-------------+-----+--------+
| PIN | SIGNAL      | PIN | SIGNAL |   | PIN | SIGNAL      | PIN | SIGNAL |
+-----+-------------+-----+--------+   +-----+-------------+-----+--------+
|  1  | DIO 1       |  A  | DIO 5  |   |  1  | GND         |  A  | GND    |
|  2  | DIO 2       |  B  | DIO 6  |   |  2  | VIDEO       |  B  | CA1    |
|  3  | DIO 3       |  C  | DIO 7  |   |  3  | /SRQ IN     |  C  | PA0    |
|  4  | DIO 4       |  D  | DIO 8  |   |  4  | /EOI        |  D  |  |1    |
|  5  | EOI         |  E  | REN    |   |  5  | DIAG        |  E  |  |2    |
|  6  | DAV         |  F  | GND    |   |  6  | #2CASSREAD  |  F  |  |3    |
|  7  | NRFD        |  H  |  |     |   |  7  | CASSWRITE   |  H  |  |4    |
|  8  | NDAC        |  J  |  |     |   |  8  | #1CASSREAD  |  J  |  |5    |
|  9  | IFC         |  K  |  |     |   |  9  | VERT DRIVE  |  K  |  |6    |
| 10  | SRQ         |  L  |  |     |   | 10  | HORZ DRIVE  |  L  |  V7    |
| 11  | ATN         |  M  |  V     |   | 11  | GRAPHIC     |  M  | CB2    |
| 12  | CHASSIS GND |  N  | GND    |   | 12  | GND         |  N  | GND    |
+-----+-------------+-----+--------+   +-----+-------------+-----+--------+

[ All IEEE signals are active low ]

    1  2  3  4  5  6  7  8  9 10 11 12
 +--o--o--o--o--o--o--o--o--o--o--o--o--+
 |                                      |  J1 / J2     [PCB edge connector]
 +--o--o--o--o--o--o--o--o--o--o--o--o--+
    A  B  C  D  E  F  H  J  K  L  M  N


   1  2  3  4  5  6  7  8  9 10 11 12
 +------------------------------------+
 | o  o  o  o  o  o  o  o  o  o  o  o |
 |                                    |    J12        [upright pins on PCB]
 | o  o  o  o  o  o  o  o  o  o  o  o |
 +------------------------------------+
   A  B  C  D  E  F  H  J  K  L  M  N

8296 Tape

The same for the Tape connectors - supposed to be the same for all models

CASSETTE 1                             CASSETTE 2
==========                             ==========

Arrangement of pins  plug J3           Arrangement of pins  plug J6

+-----+-----+----------------------+   +-----+-----+----------------------+
| PIN | PIN | SIGNAL               |   | PIN | PIN | SIGNAL               |
+-----+-----+----------------------+   +-----+-----+----------------------+
|  1  |  A  | GND                  |   |  1  |  A  | GND                  |
|  2  |  B  | +5V                  |   |  2  |  B  | +5V                  |
|  3  |  C  | CASS MOTOR           |   |  3  |  C  | CASS MOTOR           |
|  4  |  D  | CASS READ          #1|   |  4  |  D  | CASS READ          #2|
|  5  |  E  | CASS WRITE           |   |  5  |  E  | CASS WRITE           |
|  6  |  F  | CASS SWITCH        #1|   |  6  |  F  | CASS SWITCH        #2|
+-----+-----+----------------------+   +-----+-----+----------------------+


    1  2  3  4  5  6
 +--o--o--o--o--o--o--+
 |                    |  J3 / J6                      [card edge connector]
 +--o--o--o--o--o--o--+
    A  B  C  D  E  F

8296 Memory expansion J4

MEMORY - EXPANSION
==================

Arrangement of pins  plug J4

+-----+-----------+-----+--------+
| PIN | SIGNAL    | PIN | SIGNAL |     J4
+-----+-----------+-----+--------+
|  1  | GND       | 26  | GND    | 25 o  o 50
|  2  | BD0       | 27  |  |     |    o  o
|  3  |   1       | 28  |  |     |    o  o
|  4  |   2       | 29  |  |     |    o  o
|  5  |   3       | 30  |  |     |    o  o
|  6  |   4       | 31  |  |     |    o  o
|  7  |   5       | 32  |  |     |    o  o
|  8  |   6       | 33  |  |     |    o  o
|  9  |   7       | 34  |  |     |    o  o
| 10  | N.C.      | 35  |  |     |    o  o
| 11  | N.C.      | 36  |  |     |    o  o
| 12  | /RAMSEL 9 | 37  |  |     |    o  o
| 13  | /RAMSEL A | 38  |  |     |    o  o
| 14  | /RAMON    | 39  |  |     |    o  o
| 15  | /SELEXP   | 40  |  |     |    o  o
| 16  | N.C.      | 41  |  |     |    o  o
| 17  | /CS 9     | 42  |  |     |    o  o
| 18  | /CS A     | 43  |  |     |    o  o
| 19  | /CS E     | 44  |  |     |    o  o
| 20  | /NOROM    | 45  |  |     |    o  o
| 21  | /PENSTRB  | 46  |  |     |    o  o
| 22  | /RESET    | 47  |  |     |    o  o
| 23  | READY     | 48  |  |     |    o  o
| 24  | /NMI      | 49  |  V     |    o  o
| 25  | GND       | 50  | GND    |  1 o  o 26
+-----+-----------+-----+--------+

8296 Memory expansion J9

MEMORY - EXPANSION
==================

Arrangement of pins  plug J9

+-----+-----------+-----+--------+
| PIN | SIGNAL    | PIN | SIGNAL |     J9
+-----+-----------+-----+--------+
|  1  | GND       | 26  | GND    | 25 o  o 50
|  2  | BA 0      | 27  |  |     |    o  o
|  3  |    1      | 28  |  |     |    o  o
|  4  |    2      | 29  |  |     |    o  o
|  5  |    3      | 30  |  |     |    o  o
|  6  |    4      | 31  |  |     |    o  o
|  7  |    5      | 32  |  |     |    o  o
|  8  |    6      | 33  |  |     |    o  o
|  9  |    7      | 34  |  |     |    o  o
| 10  |    8      | 35  |  |     |    o  o
| 11  |    9      | 36  |  |     |    o  o
| 12  |   10      | 37  |  |     |    o  o
| 13  |   11      | 38  |  |     |    o  o
| 14  |   12      | 39  |  |     |    o  o
| 15  |   13      | 40  |  |     |    o  o
| 16  |   14      | 41  |  |     |    o  o
| 17  |   15      | 42  |  |     |    o  o
| 18  | SYNC      | 43  |  |     |    o  o
| 19  | /IRQ      | 44  |  |     |    o  o
| 20  | DIAG      | 45  |  |     |    o  o
| 21  | PHI2      | 46  |  |     |    o  o
| 22  | B R/W     | 47  |  |     |    o  o
| 23  | /B R/W    | 48  |  |     |    o  o
| 24  | N.C       | 49  |  V     |    o  o
| 25  | GND       | 50  | GND    |  1 o  o 26
+-----+-----------+-----+--------+

8296 Power supplies/expansion J10 and J11

POWER EXP. AC                         POWER EXP. DC
=============                         =============

Arrangement of pins  plugJ10          Arrangement of pins  plugJ11

+-----+-----------+                   +-----+-----------+
| PIN | SIGNAL    |                   | PIN | SIGNAL    |
+-----+-----------+   +---+           +-----+-----------+   +---+
|  1  | AC  8V    |  1| o |           |  1  | +9V UNREG.|  1| o |
|  2  | AC  8V    |  2| o |           |  2  | KEY       |  2|   |
|  3  | GND       |  3| o |           |  3  | KEY       |  3|   |
|  4  | KEY       |  4|   |           |  4  | +9V UNREG.|  4| o |
|  5  | GND       |  5| o |           |  5  | GND       |  5| o |
|  6  | AC  8V    |  6| o |           |  6  | +9V UNREG.|  6| o |
|  7  | AC  8V    |  7| o |           |  7  | GND       |  7| o |
+-----+-----------+   +---+           +-----+-----------+   +---+

8296 Changes in arrangements of pins Memory expansion J4

This is the change from 8032 (old) to 8296 (new).

J 4    Memory expansion
+-----------------------------------+
| Pin        Signal                 |
|       old            new          |
+-----------------+-----------------+
| 12  /SEL 4      | /RAM SEL 9      |
| 13  /SEL 5      | /RAM SEL A      |
| 14  /SEL 6      | /RAM ON         |
| 15  /SEL 7      | /SEL EXP        |
| 16  /SEL 8      | N.C.            |
| ...             |                 |
| 19  /SEL B      | /CS E           |
+-----------------+-----------------+

8296 Power supply J8 changes from 8032

J 8     Power supply
+-----------------+-----------------+
|      8032       |      8096       |
|                 |                 |
| Pin  Signal     | Pin  Signal     |
+-----------------+-----------------+
|  1   8V AC      |  1   AC         |
|  2   +9V UNREG  |  2   GND        |
|  3   GND        |  3   AC         |
|  4   8V AC      |                 |
|  5   8V AC      |                 |
|  6   GND        |                 |
|  7   KEY        |                 |
|  8   14V AC     |                 |
|  9   14V AC     |                 |
+-----------------+-----------------+

8296 Power supply for hardware expansion J10 changes from 8032

J 10    Power supply for hardware expansion
+-----------------------------------+
| Pin        Signal                 |
|       old            new          |
+-----------------+-----------------+
|  1    -9V UNREG |   AC 1          |
|  2    -9V UNREG |   AC 1          |
|  3    KEY       |   GND           |
|  4    +16V UNREG|   KEY           |
|  5    +16V UNREG|   GND           |
|  6    GND       |   AC 2          |
|  7    GND       |   AC 2          |
+-----------------+-----------------+

8296 keyboard connector on board J5

KEYBOARD
========

Arrangement of pins plug J5

+-----+--------+
| PIN | SIGNAL |  J5
+-----+--------+ +---+
|  A  | KIN 0  | | o |  A
|  B  | |   1  | | o |  B
|  C  | |   2  | | o |  C
|  D  | |   3  | | o |  D
|  E  | |   4  | | o |  E
|  F  | |   5  | | o |  F
|  H  | |   6  | | o |  H
|  J  | V   7  | | o |  J
|  1  | DEC 0  | | o |  1
|  2  | |   1  | | o |  2
|  3  | |   2  | | o |  3
|  4  | |   3  | | o |  4
|  5  | |   4  | | o |  5
|  6  | |   5  | | o |  6
|  7  | |   6  | | o |  7
|  8  | |   7  | | o |  8
|  9  | |   8  | | o |  9
| 10  | V   9  | | o | 10
| 11  | KEY    | |   | 11
| 12  | GND    | | o | 12
+-----+--------+ +---+

8296 Reset switch

          RESET
          =====

          Arrangement of pins plug J14

          +-----+--------+
          | PIN | SIGNAL |
          +-----+--------+  +---+
          |  1  | RESET  | 1| o |
          |  2  | GND    | 2| o |
          +-----+--------+  +---+

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Last modified: 2021-12-29
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