| # | Label | Type |
|---|---|---|
| 1 | VSS | gnd |
| 2 | ~NMI | in |
| 3 | ~IRQ | in |
| 4 | ~FIRQ | in |
| 5 | BS | out |
| 6 | BA | out |
| 7 | VCC | vcc |
| 8 | A0 | out |
| 9 | A1 | out |
| 10 | A2 | out |
| 11 | A3 | out |
| 12 | A4 | out |
| 13 | A5 | out |
| 14 | A6 | out |
| 15 | A7 | out |
| 16 | A8 | out |
| 17 | A9 | out |
| 18 | A10 | out |
| 19 | A11 | out |
| 20 | A12 | out |
| 21 | A13 | out |
| 22 | A14 | out |
| 23 | A15 | out |
| 24 | D7 | io |
| 25 | D6 | io |
| 26 | D5 | io |
| 27 | D4 | io |
| 28 | D3 | io |
| 29 | D2 | io |
| 30 | D1 | io |
| 31 | D0 | io |
| 32 | R/~W | out |
| 33 | ~DMA/BREQ | in |
| 34 | E | out |
| 35 | Q | out |
| 36 | MRDY | in |
| 37 | ~RESET | in |
| 38 | EXTAL | in |
| 39 | XTAL | in |
| 40 | ~HALT | in |