## Z80 Parallel Input/Output Controller

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Z 80 PIO | Pin | Use | Pin | Use | Pin | Use | Pin | Use
--- | --- | --- | --- | --- | --- | --- | --- | ---
| 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

I'm looking for the docs about how to program this device. If you have it in digital-form please email me.

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