Gaplus ------ Parts Side Solder Side ----------------------------------------- GND A | 1 GND SPEAKER + B | 2 SPEAKER - LOCK OUT SOLENOID C | 3 COIN COUNTER 1 P START LAMP D | 4 2 P START LAMP +12V E | 5 +12V +5V F | 6 +5V GND H | 7 GND SERVICE SW J | 8 COIN 1 SW K | 9 COIN 2 SW 1 P START SW L | 10 2 P START SW P1 Button 1 M | 11 P2 Button 1 P1 LEFT SW N | 12 P2 LEFT SW P1 DOWN SW P | 13 P2 DOWN SW P1 RIGHT SW R | 14 P2 RIGHT SW P1 UP SW S | 15 P2 UP SW T | 16 U | 17 V | 18 P1 Button 2 W | 19 P2 Button 2 X | 20 COIN COUNTER 2 Y | 21 TABLE GND GND Z | 22 GND If you have a cocktail version, then connect pin 21 to ground. Otherwise, leave it off. SOCKET CONTACT (VIDEO) SOCKET CONTACT (PWR) 1 RED 1 +12V 1A 2 GREEN 2 GND 3 BLUE 3 +5V 4A 4 SYNC 5 GND 6 N/C ---------------------------------------------------------------------------- I don't remember if the switches are labelled 'A' and 'B' on the board or not, but that's how they are referred to in the manual, and 'A' is the one closer to the pinouts. Switch A ( * indicates factory recommended settings ) 1 2 3 4 5 6 7 8 off off 3 fighters * off on 2 fighters on off 4 fighters on on 5 fighters off off 1 coin = 1 credit * (coin 1) off on 1 coin = 2 credits on off 2 coins = 1 credit on on 3 coins = 1 credit off sound in attract mode on no sound in attract mode * off (not used - should stay off) off off 1 coin = 1 credit * (coin 2) off on 1 coin = 2 credits on off 2 coins = 1 credit on on 3 coins = 1 credit Switch B 1 2 3 4 5 6 7 8 off normal * on test off off on level 1 (easiest) off off off 0 (standard) * off on off 2 (progressively off on on 3 more difficult) on off off 4 on off on 5 on on off 6 on on on 7 off normal * Round Advance on advance (see note below) off off off 100, 300 and every 600 Bonus Ships off off on 150, 400 (in hundred housands) [Note: on my machine off on off 150, 400 and every 900 these switches did off on on 100, 300 and every 300 _not_ have the on off off 50, 200 and every 300 indicated effect] on off on 50, 150 and every 600 on on off 50, 150 and every 300 on on on 30, 150 and every 600 * Round Advance note: By turning 'on' the option switch while 'parsec' is being indicated on the screen, you can advance through the 'rounds'. Push the one player control lever forward (player number one _up_ switch is 'on') to indicate the number. The indicated round number will appear on the monitor screen when the option switch is turned 'off'.