Zaxxon Sega/Gremlin, 1982 ------------------------- 44pin connector at location P5 on Assy IC Brd A, Sound II SOLDER SIDE | PARTS SIDE | Gnd | A | 1 | Gnd Gnd | B | 2 | Gnd +5V | C | 3 | +5V +5V | D | 4 | +5V -5V | E | 5 | -5V +12V | F | 6 | (+12V) Spkr - | H | 7 | Spkr + (Coin Meter A) | J | 8 | (Coin Meter B) Coin Mech A | K | 9 | Coin Mech B Reset | L | 10| Service Switch P1 Start | M | 11| P2 Start P1 Left | N | 12| P1 Right P1 Up | P | 13| P1 Down P1 Fire | R | 14| (P1 Spare) (P2 Left) | S | 15| (P2 Right) (P2 Up) | T | 16| (P2 Down) (P2 Fire) | U | 17| (P2 Spare) (Gnd) | V | 18| (Gnd) R | W | 19| G B | X | 20| Comp Sync * (Gnd) | Y | 21| (Gnd) (Gnd) | Z | 22| (Gnd) * At the bottom center of the Sound II board, there is a section labeled "Color Conv." At the far left you will see switch #4 (SW4). If this switch is off ("0"), you will get JAMMA compatible negative composite sync. If it is on ("1"), you will get positive composite sync. Items in parantheses "()" are only needed for the cocktail setup, or perhaps as extra pinouts. Speaker @ 8 Ohms There is an additional 10pin connector between P1 on both boards. Pin 1 on the sound board maps to pin 1 on the video board, pin 2 on the sound board maps to pin 2 on the video board, etc. A Zaxxon boardset should come with the connector between these two sets of pins. P1 connector on both boards: Pin | Definition ---------------- 1 | Unused 2 | +12V 3 | Unused 4 | Gnd 5 | Gnd 6 | Gnd 7 | -5V 8 | +5V 9 | +5V 10 | +5V There is an additional 6pin MTA connector at P4. I believe it is needed to get sound. P4 connector on Sound II Board Pin | Definition ------------------------ 1 | Unused 2 | Unused 3 | Spkr + [to P57?] 4 | Spkr - [to P5H?] 5 | Unused 6 | Unused Switch Bank #1 -------------- SW #1 SW #2 (Bonus Ship) SW #5 SW #6 ----- ----- ----- ----- ON ON AT 10,000 * ON ON 3 Ships * ON OFF AT 20,000 ON OFF 4 Ships OFF ON AT 30,000 OFF ON 5 Ships OFF OFF AT 40,000 OFF OFF Free-Play SW #7 SW #8 ----- ----- ON Sound On * ON Cocktail Table OFF Sound Off OFF Upright Machine * Switch Bank #2 My Defaults: SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 -------------- ON ON ??? ??? ON ON ON OFF SW #1 SW #2 SW #3 SW #4 SW #5 SW #6 SW #7 SW #8 (Coin Mech A/B) ----- ----- ----- ----- ----- ----- ----- ----- ON ON ON ON ON ON ON ON 4 Coins 1 Play ON ON ON OFF ON ON ON OFF 3 Coins 1 Play ON ON OFF ON ON ON OFF ON 2 Coins 1 Play ON ON OFF OFF ON ON OFF OFF 1 Coin 1 Play ON OFF ON ON ON OFF ON ON * 1 Coin 2 Plays ON OFF ON OFF ON OFF ON OFF 1 Coin 3 Plays ON OFF OFF ON ON OFF OFF ON 1 Coin 4 Plays ON OFF OFF OFF ON OFF OFF OFF 1 Coin 5 Plays OFF ON ON ON OFF ON ON ON 1 Coin 6 Plays OFF ON ON OFF OFF ON ON OFF 2 Coins 1 Play 4 Coins 2 Plays 5 Coins 3 Plays 6 Coins 4 Plays OFF ON OFF ON OFF ON OFF ON 2 Coins 1 Play 4 Coins 3 Plays OFF ON OFF OFF OFF ON OFF OFF 1 Coin 1 Play 2 Coins 2 Plays 3 Coins 3 Plays 4 Coins 4 Plays 5 Coins 6 Plays OFF OFF ON ON OFF OFF ON ON 1 Coin 1 Play 2 Coins 2 Plays 3 Coins 3 Plays 4 Coins 5 Plays OFF OFF ON OFF OFF OFF ON OFF 1 Coin 1 Play 2 Coins 3 Plays OFF OFF OFF ON OFF OFF OFF ON 1 Coin 2 Plays 2 Coins 4 Plays 3 Coins 6 Plays 4 Coins 8 Plays 5 Coins 11 Plays OFF OFF OFF OFF OFF OFF OFF OFF 1 Coin 2 Plays 2 Coins 4 Plays 3 Coins 6 Plays 4 Coins 9 Plays