Rally-X Pinouts Midway, 9 January 1981 Logic Board I, part. no. A082-91385-C000 PARTS SIDE | SOLDER SIDE ------------------------------------|-------------------------------------- (+5V) Gnd | A | 1 | Gnd (+5V) --------------------------------|---|---|---------------------------------- (+5V) Gnd | B | 2 | Gnd (+5V) --------------------------------|---|---|---------------------------------- +5V | C | 3 | +5V --------------------------------|---|---|---------------------------------- +5V | D | 4 | +5V --------------------------------|---|---|---------------------------------- (?) Credit Mult. | E | 5 | Power Credit Mult. (?) --------------------------------|---|---|---------------------------------- (Not Used) | F | 6 | Coin Meter --------------------------------|---|---|---------------------------------- Coin Sw. | H | 7 | NC (?)* --------------------------------|---|---|---------------------------------- 1P Start | J | 8 | 2P Start --------------------------------|---|---|---------------------------------- P1 Up | K | 9 | P2 Up --------------------------------|---|---|---------------------------------- P1 Down | L | 10| P2 Down --------------------------------|---|---|---------------------------------- P1 Right | M | 11| P2 Right --------------------------------|---|---|---------------------------------- P1 Left | N | 12| P2 Left --------------------------------|---|---|---------------------------------- P1 Smoke | P | 13| P2 Smoke --------------------------------|---|---|---------------------------------- Credit Sw. | R | 14| Test Pos. --------------------------------|---|---|---------------------------------- | S | 15| Gnd (Cocktail only) --------------------------------|---|---|---------------------------------- (Common) Gnd | T | 16| Gnd (Monitor) --------------------------------|---|---|---------------------------------- Red | U | 17| Green --------------------------------|---|---|---------------------------------- Blue | V | 18| Comp. Sync --------------------------------------------------------------------------- Spkr | W | 19| Spkr --------------------------------|---|---|---------------------------------- +12V | X | 20| +12V --------------------------------|---|---|---------------------------------- (+12V) Gnd | Y | 21| Gnd (+12V) --------------------------------|---|---|---------------------------------- (+12V) Gnd | Z | 22| Gnd (+12V) --------------------------------------------------------------------------- * NC may *not* mean "No Care" for this pinout. I can't figure out what it does exactly, but it does have traces in the schematic similar to the other buttons, controls, and switches. Elsewhere on the schematic (pin F) there is a "N.C." which is, I'm sure, a "No Care" pin. modified 96/11/18 by Paul T. (aq929@torfree.net) - parts/solder side was reversed