Reference and Sources: 
(50 PIN IDC MALE at the controller & devices)
(50 PIN IDC FEMALE at the cable)
| Pin | Name | Dir | Description | | 01 | GND | ------ | Ground | | 02 | GND | ------ | Ground | | 03 | +DB0 | IN/OUT | +Data Bus 0 | | 04 | -DB0 | IN/OUT | -Data Bus 0 | | 05 | +DB1 | IN/OUT | +Data Bus 1 | | 06 | -DB1 | IN/OUT | -Data Bus 1 | | 07 | +DB2 | IN/OUT | +Data Bus 2 | | 08 | -DB2 | IN/OUT | -Data Bus 2 | | 09 | +DB3 | IN/OUT | +Data Bus 3 | | 10 | -DB3 | IN/OUT | -Data Bus 3 | | 11 | +DB4 | IN/OUT | +Data Bus 4 | | 12 | -DB4 | IN/OUT | -Data Bus 4 | | 13 | +DB5 | IN/OUT | +Data Bus 5 | | 14 | -DB5 | IN/OUT | -Data Bus 5 | | 15 | +DB6 | IN/OUT | +Data Bus 6 | | 16 | -DB6 | IN/OUT | -Data Bus 6 | | 17 | +DB7 | IN/OUT | +Data Bus 7 | | 18 | -DB7 | IN/OUT | -Data Bus Parity7 | | 19 | +DBP | IN/OUT | +Data Bus Parity (odd Parity) | | 20 | -DBP | IN/OUT | -Data Bus Parity (odd Parity) | | 21 | DIFFSENS | ? | ??? | | 22 | GND | ------ | Ground | | 23 | res | - | Reserved | | 24 | res | - | Reserved | | 25 | TERMPWR | IN/OUT | Termination Power | | 26 | TERMPWR | IN/OUT | Termination Power | | 27 | res | - | Reserved | | 28 | res | - | Reserved | | 29 | +ATN | IN | +Attention | | 30 | -ATN | IN | -Attention | | 31 | GND | ------ | Ground | | 32 | GND | ------ | Ground | | 33 | +BSY | IN/OUT | +Bus is busy | | 34 | -BSY | IN/OUT | -Bus is busy | | 35 | +ACK | IN | +Acknowledge | | 36 | -ACK | IN | -Acknowledge | | 37 | +RST | IN/OUT | +Reset | | 38 | -RST | IN/OUT | -Reset | | 39 | +MSG | OUT | +Message | | 40 | -MSG | OUT | -Message | | 41 | +SEL | IN/OUT | +Select | | 42 | -SEL | IN/OUT | -Select | | 43 | +C/D | OUT | +Control or Data | | 44 | -C/D | OUT | -Control or Data | | 45 | +REQ | OUT | +Request | | 46 | -REQ | OUT | -Request | | 47 | +I/O | OUT | +In/Out | | 48 | -I/O | OUT | -In/Out | | 49 | GND | ------ | Ground | | 50 | GND | ------ | Ground |
Note: Direction is Device relative Bus (other Devices).
For more informations, references and sources go to
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