80 PIN ??? CONNECTOR at the computer.
| Pin | Name | Description |
| 1 | GND | Ground |
| 2 | GND | Ground |
| 3 | VCC | +5 VDC |
| 4 | VCC | +5 VDC |
| 5 | /CFGOUT | Configout AutoConfig signal (not connected) |
| 6 | /CFGIN | Configin AutoConfig signal (grounded) |
| 7 | GND | Ground |
| 8 | CCKQ | 3.58 MHz CCKQ clock (C3) |
| 9 | CDAC | 7.16 MHz CDAC clock (90° before system clock) |
| 10 | CCK | 3.58 MHz CCK clock (C1) |
| 11 | /OVR | Override (Disables /DTACK generation of Gary) |
| 12 | XRDY | External Ready (Generates wait states while low). |
| 13 | /INT2 | Level 2 Interrupt |
| 14 | n/c | not connected |
| 15 | A5 | Address Bus 5 |
| 16 | /INT6 | Level 6 Interrupt |
| 17 | A6 | Address Bus 6 |
| 18 | A4 | Address Bus 4 |
| 19 | GND | Ground |
| 20 | A3 | Address Bus 3 |
| 21 | A2 | Address Bus 2 |
| 22 | A7 | Address Bus 7 |
| 23 | A1 | Address Bus 1 |
| 24 | A8 | Address Bus 8 |
| 25 | /FC0 | Processor Function Code Status (bit 0) |
| 26 | A9 | Address Bus 9 |
| 27 | /FC1 | Processor Function Code Status (bit 1) |
| 28 | A10 | Address Bus 10 |
| 29 | /FC2 | Processor Function Code Status (bit 2) |
| 30 | A11 | Address Bus 11 |
| 31 | GND | Ground |
| 32 | A12 | Address Bus 12 |
| 33 | A13 | Address Bus 13 |
| 34 | /IPL0 | Interrupt Priority Level (bit 0) |
| 35 | A14 | Address Bus 14 |
| 36 | /IPL1 | Interrupt Priority Level (bit 1) |
| 37 | A15 | Address Bus 15 |
| 38 | /IPL2 | Interrupt Priority Level (bit 2) |
| 39 | A16 | Address Bus 16 |
| 40 | /BERR | Bus Error |
| 41 | A17 | Address Bus 17 |
| 42 | /VPA | Valid Peripheral Address (asserted by Gary) |
| 43 | GND | Ground |
| 44 | E | E Clock |
| 45 | /VMA | Valid Memory Address (asserted by Gary) |
| 46 | A18 | Address Bus 18 |
| 47 | /RST | Reset |
| 48 | A19 | Address Bus 19 |
| 49 | /HLT | Halt |
| 50 | A20 | Address Bus 20 |
| 51 | A22 | Address Bus 22 |
| 52 | A21 | Address Bus 21 |
| 53 | A23 | Address Bus 23 |
| 54 | /BR | Bus Request |
| 55 | GND | Ground |
| 56 | /BGACK | Bus Grant Acknowledge |
| 57 | D15 | Data Bus 15 |
| 58 | /BG | Bus Grant |
| 59 | D14 | Data Bus 14 |
| 60 | /DTACK | Data Transfer Acknowledge (normally asserted by Gary) |
| 61 | D13 | Data Bus 13 |
| 62 | R/W | Read/Write (high=read, low=write) |
| 63 | D12 | Data Bus 12 |
| 64 | /LDS | Lower Data Strobe |
| 65 | D11 | Data Bus 11 |
| 66 | /UDS | Upper Data Strobe |
| 67 | GND | Ground |
| 68 | /AS | Address Strobe |
| 69 | D0 | Data Bus 0 |
| 70 | D10 | Data Bus 10 |
| 71 | D1 | Data Bus 1 |
| 72 | D9 | Data Bus 9 |
| 73 | D2 | Data Bus 2 |
| 74 | D8 | Data Bus 8 |
| 75 | D3 | Data Bus 3 |
| 76 | D7 | Data Bus 7 |
| 77 | D4 | Data Bus 4 |
| 78 | D6 | Data Bus 6 |
| 79 | GND | Ground |
| 80 | D5 | Data Bus 5 |