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Z80 Parallel Input/Output Controller


NOTE: the asterisk means ACTIVE LOW

Z 80 PIO Pin Use Pin Use Pin Use Pin Use
Z80 PIO 1 D2 11 GND 21 B RDY 31 PORT B4
2 D7 12 PORT A3 22 INT ENABLE OUT 32 PORT B5
3 D6 13 PORT A2 23 *INT 33 PORT B6
4 *CHIP ENABLE 14 PORT A1 24 INT ENABLE IN 34 PORT B7
5 CONTROL/DATA SEL 15 PORT A0 25 CLOCK INPUT 35 *RD
6 PORT B/A SEL 16 *A STB 26 + 5V POWER 36 *IORQ
7 PORT A7 17 *B STB 27 PORT B0 37 *M1
8 PORT A6 18 A RDY 28 PORT B1 38 D5
9 PORT A5 19 D0 29 PORT B2 39 D4
10 PORT A4 20 D1 30 PORT B3 40 D3


Docs about how to program this device.