| A8 | <-- | 1 | --NSC-- --800-- |
40 | --- | Vcc |
| A9 | <-- | 2 | 39 | --> | !PS | |
| A10 | <-- | 3 | 38 | <-- | !WAIT | |
| A11 | <-- | 4 | 37 | --> | RESET OUT | |
| A12 | <-- | 5 | 36 | <-- | !BREQ | |
| A13 | <-- | 6 | 35 | --> | !BACK | |
| A14 | <-- | 7 | 34 | --> | IO/!M | |
| A15 | <-- | 8 | 33 | <-- | !RESET IN | |
| CLK | <-- | 9 | 32 | --> | !RD | |
| XOUT | <-- | 10 | 31 | --> | !WR | |
| XIN | --> | 11 | 30 | --> | ALE | |
| AD0 | <-> | 12 | 29 | --> | S0 | |
| AD1 | <-> | 13 | 28 | --> | !RFSH | |
| AD2 | <-> | 14 | 27 | --> | S1 | |
| AD3 | <-> | 15 | 26 | --> | !INTA | |
| AD4 | <-> | 16 | 25 | <-- | !INTR | |
| AD5 | <-> | 17 | 24 | <-- | !RSTC | |
| AD6 | <-> | 18 | 23 | <-- | !RSTB | |
| AD7 | <-> | 19 | 22 | <-- | !RSTA | |
| GND | --- | 20 | 21 | <-- | !NMI |
The NSC800 essentially provides a CPU with a Z80 instruction set and 8085 bus signals.