Pinout for P2 (the MDR-36 connector on the 932 interface)

This is a 36 pin MDR connector, with the following functions on each pin:
1 Serial Tx
3 Serial Rx
5 Serial CTS
7 Ground
9 Serial RTS
22 TTL Button 5 (Blue left)
24 TTL Button 6 (Yellow left)
26 TTL Button 7 (Green left)
28 TTL Button 8 (Red left)
30 TTL Button 1 (Blue right)
32 TTL Button 2 (Yellow right)
34 TTL Button 3 (Green right)
36 TTL Button 4 (Red right)
33 TTL Button 10 (White left)
35 TTL Button 9 (White right)
29 TTL trigger out

No external connections should be made to any of the other pins on this connector: doing so could cause damage to the internal circuitry.

Cable CB-932-PAR-1 Connections

These are the pin assignments for the DB-25 end of the standard parallel cable (the CB-932-PAR-1).

The third column, labeled "Par.", gives the parallel port names for each of the corresponding lines.

Button Pin Par. Typical assignment
1 2 D0 Blue, right
2 3 D1 Yellow, right
3 4 D2 Green, right
4 5 D3 Red, right
5 7 D5 Blue, left
6 8 D6 Yellow, left
7 9 D7 Green, left
8 11 +BUSY Red, left
9 6 D4 White, right
10 12 +PAPER White, left
Trigger 10 -ACK  
- 18 GND Ground