Steeple Chase, Atari (1975)
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44-pin edge connector
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     GND            | 1  | A  |    GND
     GND            | 2  | B  |    GND
     16v AC         | 3  | C  |    16v AC
     16v AC         | 4  | D  |    16v AC
     N/C            | 5  | E  |    N/C
     Lamps 2 and 5  | 6  | F  |    N/C
     Lamps 3 and 6  | 7  | H  |    N/C
     Lamps 1 and 4  | 8  | J  |    N/C
     JUMP SW 5      | 9  | K  |    JUMP SW 4
     JUMP SW 6      | 10 | L  |    JUMP SW 2
     JUMP SW 1      | 11 | M  |    JUMP SW 3 
     ANTENNA        | 12 | N  |    COIN SW 1
     COIN SW 2      | 13 | P  |    N/C
     START SW       | 14 | R  |    N/C
     AUDIO (+)      | 15 | S  |    N/C
     N/C            | 16 | T  |    COIN COUNTER
     GND            | 17 | U  |    GND
     COIN COUNTER   | 18 | V  |    N/C
     25v AC         | 19 | W  |    25v AC
     25v AC         | 20 | X  |    25v AC
     VIDEO          | 21 | Y  |    VIDEO GND
     GND            | 22 | Z  |    AUDIO (-)





