| ATA (40) Pin | CD-ROM (50) Pin | Name | Description |
|---|---|---|---|
| 1 | Audio Left | audio left | |
| 2 | Audio Right | audio right | |
| 3 | Audio ground | audio ground | |
| 2 | 4 | GND | Ground |
| 1 | 5 | /RESET | Reset |
| 4 | 6 | DD8 | Data 8 |
| 3 | 7 | DD7 | Data 7 |
| 6 | 8 | DD9 | Data 9 |
| 5 | 9 | DD6 | Data 6 |
| 8 | 10 | DD10 | Data 10 |
| 7 | 11 | DD5 | Data 5 |
| 10 | 12 | DD11 | Data 11 |
| 9 | 13 | DD4 | Data 4 |
| 12 | 14 | DD12 | Data 12 |
| 11 | 15 | DD3 | Data 3 |
| 14 | 16 | DD13 | Data 13 |
| 13 | 17 | DD2 | Data 2 |
| 16 | 18 | DD14 | Data 14 |
| 15 | 19 | DD1 | Data 1 |
| 18 | 20 | DD15 | Data 15 |
| 17 | 21 | DD0 | Data 0 |
| 21 | 22 | DMARQ | DMA Request |
| 19 | 23 | GND | Ground |
| 25 | 24 | /DIOR | Read Strobe |
| 23 | 25 | /DIOW | Write Strobe |
| 22 | 26 | GND | Ground |
| 27 | 27 | IORDY | I/O Ready |
| 29 | 28 | /DMACK | DMA Acknowledge |
| 31 | 29 | INTRQ | Interrupt Request |
| 32 | 30 | /IOCS16 | IO ChipSelect 16 |
| 33 | 31 | DA1 | Address 1 |
| 34 | 32 | PDIAG | Passed Diagnostics |
| 35 | 33 | DA0 | Address 0 |
| 36 | 34 | DA2 | Address 2 |
| 37 | 35 | /IDE_CS0 | (1F0-1F7) |
| 38 | 36 | /IDE_CS1 | (3F6-3F7) |
| 39 | 37 | /ACTIVE - /DASI - DASP | Led driver |
| +5V | 38 | +5V | + 5 volts power |
| +5V | 39 | +5V | + 5 volts power |
| +5V | 40 | +5V | + 5 volts power |
| +5V | 41 | +5V | + 5 volts power |
| +5V | 42 | +5V | + 5 volts power |
| 24 | 43 | GND | Ground |
| 26 | 44 | GND | Ground |
| 30 | 45 | GND | Ground |
| 40 | 46 | GND | Ground |
| 28 | 47 | Device Cfg | Spindle Sync or Cable Select |
| GROUND | 48 | GND | Ground |
| 49 | reserved | Vendor Unique | |
| 50 | reserved | Vendor Unique |
