| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | /RESET | ¨ | Reset |
| 2 | GND | Ground | |
| 3 | DD7 | ©¨ | Data 7 |
| 4 | DD8 | ©¨ | Data 8 |
| 5 | DD6 | ©¨ | Data 6 |
| 6 | DD9 | ©¨ | Data 9 |
| 7 | DD5 | ©¨ | Data 5 |
| 8 | DD10 | ©¨ | Data 10 |
| 9 | DD4 | ©¨ | Data 4 |
| 10 | DD11 | ©¨ | Data 11 |
| 11 | DD3 | ©¨ | Data 3 |
| 12 | DD12 | ©¨ | Data 12 |
| 13 | DD2 | ©¨ | Data 2 |
| 14 | DD13 | ©¨ | Data 13 |
| 15 | DD1 | ©¨ | Data 1 |
| 16 | DD14 | ©¨ | Data 14 |
| 17 | DD0 | ©¨ | Data 0 |
| 18 | DD15 | ©¨ | Data 15 |
| 19 | GND | Ground | |
| 20 | KEY | Key (Pin missing) | |
| 21 | DMARQ | DMA Request | |
| 22 | GND | Ground | |
| 23 | /DIOW | ¨ | Write Strobe |
| 24 | GND | Ground | |
| 25 | /DIOR | ¨ | Read Strobe |
| 26 | GND | Ground | |
| 27 | /IORDY | © | I/O Ready |
| 28 | SPSYNC:CSEL | Spindle Sync or Cable Select | |
| 29 | /DMACK | DMA Acknowledge | |
| 30 | GND | Ground | |
| 31 | INTRQ | © | Interrupt Request |
| 32 | /IOCS16 | ? | IO ChipSelect 16 |
| 33 | DA1 | ¨ | Address 1 |
| 34 | PDIAG | Passed Diagnostics | |
| 35 | DA0 | ¨ | Address 0 |
| 36 | DA2 | ¨ | Address 2 |
| 37 | /IDE_CS0 | ¨ | (1F0-1F7) |
| 38 | /IDE_CS1 | ¨ | (3F6-3F7) |
| 39 | /ACTIVE | ¨ | Led driver |
| 40 | GND | Ground |