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Atari 5200,7800 Expansion pinout

motherboard connector

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UNKNOWN connector
at the Atari motherboard


Atari 5200 Expansion connector

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

Atari 7800 Expansion connector

 Gnd   +5v  CVideo MLum0 Mlum3 Blank OscDis ExtMen Gnd
--1-- --2--  --3-- --4-- --5-- --6-- --7-- ---8-- --9--

-18-- -17--  -16-- -15-- -14-- -13-- -12-- --11-- -10--
 Gnd  Audio   Rdy   MCol MLum2 MLum1 Msync  Clk2  ExtOsc
Pin Name Description
1GNDGround
2+5V+5 VDC
3CVIDEOInput to RF modulator (Video+Audio)
4MLUM0Maria Luminance Bit 0
5MLUM3Maria Luminance Bit 3
6BLANKBlanking output
7OSCDISDisable 14.31818 MHz Master Clock
8EXTMENExternal Maria Enable Input
9GNDGround
10EXTOSCExternal clock to replace Master Clock
11CLK2Phase 2 Clock from the 6502
12MSYNCMaria Composite Sync
13MLUM1Maria Luminance Bit 1
14MLUM2Maria Luminance Bit 2
15MCOLMaria Color Phase Angle
16RDYInput to the 6502
17AUDIOAudio
18GNDGround


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Pinouts.ru > Motherboard connectors pinouts >  Pinout of Atari 5200,7800 Expansion and layout of connector
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Source(s) of this and additional information: Classic Atari 2600/5200/7800 Game Systems FAQ, from Hardware Book 0 reports
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