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 Atari Parallel Bus Interface

Atari 8 Bit Parallel Bus Interface (PBI) (600XL and 800XL only)

  
3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49

  
4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

Pin Function
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 GN
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 Math pack disable input
44 Row addr strobe
45 GND
46 Latch read/write out
47 NC (+5V on 600XL only)
48 NC (+5V on 600XL only, used to power 1064)
49 Audio input
50 GND

 

 

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