| PING | DESCRIPTION |
|---|---|
| 1 | RDY* |
| 2 | DKRDY* |
| 3 | GND |
| 4 | GND |
| 5 | GND |
| 6 | GND |
| 7 | GND |
| 8 | MTRXD* |
| 9 | SEL2B, A2000 SEL3B* (1) |
| 10 | DRESB* |
| 11 | CHNG* |
| 12 | +5V |
| 13 | SIDEB* |
| 14 | WPRO* |
| 15 | TK0* |
| 16 | DKWEB* |
| 17 | DKWDB* |
| 18 | STEPB* |
| 19 | DIRB |
| 20 | SEL3B*, A2000 not used (1) |
| 21 | SEL1B*, A2000 SEL2B* (1) |
| 22 | INDEX* |
| 23 | +12V |
(1) SEL1B* is not drive 1, but rather the first external drive. Not all select lines may be implemented.
Internal Disk Drive Header
| PIN | DESCRIPTION |
|---|---|
| 1 | GND |
| 2 | CHNG* |
| 3 | GND |
| 4 | MTR0D* (LED) |
| 5 | GND |
| 6 | NC |
| 7 | GND |
| 8 | INDEX* |
| 9 | GND |
| 10 | SEL0B* |
| 11 | GND |
| 12 | NC |
| 13 | GND |
| 14 | NC |
| 15 | GND |
| 16 | MTR0D* |
| 17 | GND |
| 18 | DIRB |
| 19 | GND |
| 20 | STEPB* |
| 21 | GND |
| 22 | DKWDB* |
| 23 | GND |
| 24 | DKWEB* |
| 25 | GND |
| 26 | DK0 |
| 27 | GND |
| 28 | WPRO* |
| 29 | GND |
| 30 | DKRD* |
| 31 | GND |
| 32 | SIDEB* |
| 33 | GND |
| 34 | RDY* |