50 PIN EDGE or IDC at the computer
| Pin | Name | Dir | Description |
|---|---|---|---|
| 2 | /REDWC | IN | Reduced Write Current |
| 4 | n/c | - | Reserved |
| 6 | n/c | - | Reserved |
| 8 | n/c | - | Reserved |
| 10 | /FD2S | IN | Disk is two sided |
| 12 | /DCG | IN | Disk has been changed/door open |
| 14 | /SIDE | OUT | Side select |
| 16 | /DLOCK | OUT | Door lock |
| 18 | /HLD | OUT | Head load |
| 20 | /INDEX | IN | Index Pulse |
| 22 | /READY | IN | Ready |
| 24 | n/c | - | Not connected |
| 26 | /SEL1 | IN | Select Drive 1 |
| 28 | /SEL2 | IN | Select Drive 2 |
| 30 | /SEL3 | IN | Select Drive 3 |
| 32 | /SEL4 | IN | Select Drive 4 |
| 34 | /DIR | OUT | Direction |
| 36 | /STEP | OUT | Step |
| 38 | /WDAT | OUT | Write data |
| 40 | /WGAT | OUT | Write gate |
| 42 | /TR00 | IN | Track 00 (Zero) |
| 44 | /WPROT | IN | Write protect |
| 46 | /RDATA | IN | Read data |
| 48 | n/c | - | Not connected |
| 50 | n/c | - | Not connected |
Notes
- Direction is Computer relative Diskdrive
- All odd pins are GND, Ground