| Pin | Name |
|---|---|
| 1 | System Ground |
| 2 | Luminance (TTL) |
| 3 | IEEE-SRQ |
| 4 | IEEE-EOI |
| 5 | Diagnostic Sense |
| 6 | Cass.1 Read |
| 7 | Cass.2 Read |
| 8 | Diag Tape Wrt. |
| 9 | Vertical Sync (TTL) |
| 10 | Horizontal Sync (TTL) |
| 11 | GND |
| 12 | GND |
| A | GND |
| B | CA1 |
| C | PB0 |
| D | PB1 |
| E | PB2 |
| F | PB3 |
| H | PB4 |
| J | PB5 |
| K | PB6 |
| L | PB7 |
| M | PA2 (CB2) |
| N | GND |
Signal level of 2, 9 and 10 is TTL (like MGA/CGA Video in IBM PC).
correct
incorrect