Amiga Internal IDE
40-Pin IDC Male in Amiga 600, 1200 and 4000.
| Pin | Description | Pin | Description |
| 1 | /Reset | 21 | Unused |
| 2 | Ground | 22 | Ground |
| 3 | Drive Data 7 | 23 | /I/O Write |
| 4 | Drive Data 8 | 24 | Ground |
| 5 | Drive Data 6 | 25 | /I/O Read |
| 6 | Drive Data 9 | 26 | Ground |
| 7 | Drive Data 5 | 27 | I/O Channel Ready |
| 8 | Drive Data 10 | 28 | Unused |
| 9 | Drive Data 4 | 29 | Unused |
| 10 | Drive Data 11 | 30 | Ground |
| 11 | Drive Data 3 | 31 | Interrupt Request |
| 12 | Drive Data 12 | 32 | Unused |
| 13 | Drive Data 2 | 33 | Disk Address 1 |
| 14 | Drive Data 13 | 34 | Unused |
| 15 | Drive Data 1 | 35 | Disk Address 1 |
| 16 | Drive Data 14 | 36 | Disk Address 1 |
| 17 | Drive Data 0 | 37 | /IDE_CS1 |
| 18 | Drive Data 15 | 38 | /IDE_CD2 |
| 19 | Ground | 39 | /Active (LED driver output) |
| 20 | Unused | 40 | Ground |
The extra four pins used on the mini 44-pin 2.5-inch IDE connector (as found in the Amiga 600 and 1200):
| 41 | +5 Volts | 43 | Ground |
| 42 | +5 Volts | 40 | Unused |
Source: Amiga 4000 Hardware Guide
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