Parallel Bus Interface - Pinout

Pinout

Parallel Bus Interface (PBI) -
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50
Parallel Bus Interface (PBI) - Pinout
Pin TOP Pin BOTTOM
1 GND Ground 2 External select
3 A0 Address output 4 A1
5 A2 6 A3
7 A4 8 A5
9 A6 10 GND
11 A7 12 A8
13 A9 14 A10
15 A11 16 A12
17 A13 18 A14
19 GND 20 A15
21 D0 Data (bidirectional) 22 D1
23 D2 24 D3
25 D4 26 D5
27 D6 28 D7
29 GND 30 GND
31 Phase 2 clock output 32 GND
33 NC Reserved 34 Reset output
35 (IRQ) Interrupt request 36 Ready input
37 NC 38 External decoder output
39 NC 40 Refresh output
41 Column address output 42 GND
43 MPD Math pack disable input 44 Row address strobe
45 GND 46 Latch read/write out
47 NC (+5V on 600XL only) 48 NC (+5V on 600XL only, used for 1064)
49 Audio input 50 GND

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