Pinouts of Connectors

Atari 5200,7800 Expansion connector pinout

layout
schematic diagram
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UNKNOWN connector  at the Atari motherboard
Pin Name
1 +5 VDC
2 Audio Out (2 port)
3 Ground
4 R/W Early
5 Enable E0-EF
6 D6
7 D4
8 D2
9 D0
10 IRQ
11 Ground
12 Serial Data In
13 Serial In Clock
14 Serial Out Clock
15 Serial Data Out
16 Audio In
17 A14
18 System Clock 01
19 A11
20 A7
21 A6
22 A5
23 A4
24 A3
25 A2
26 A1
27 A0
28 Ground
29 D1
30 D3
31 D5
32 D7
33 Not connected
34 Ground
35 Not connected
36 +5 VDC

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Pinouts.ru > Different motherboard connectors pinouts >  Pinout of Atari 5200,7800 Expansion connector and layout of connector

Source(s): Classic Atari 2600/5200/7800 Game Systems FAQ, from Hardware Book
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