"Gravitar" (Atari, 1982) ------------------------ P20: 44-pin edge connector component side solder side -------------- ----------- GND A 1 GND +5V B 2 +5V C 3 +22 VDC D 4 -22 VDC 10.3 VDC E 5 COIN LOCKOUT F 6 COIN CTR R COIN CTR L H 7 P1 LED P2 LED J 8 K 9 L 10 P1 START M 11 P2 START SW GND N 12 SW GND P 13 CABINET R 14 SLAM AUX COIN S 15 SELF TEST T 16 COIN L COIN R U 17 V 18 W 19 X 20 +5V Y 21 +SENSE (+5V) GND Z 22 -SENSE (GND) P19: 24-pin edge connector component siide solder side -------------- ----------- X OUT A 1 X GND Y OUT B 2 Y GND C 3 SHIELD D 4 FIRE ROT LEFT E 5 ROT RIGHT F 6 THRUST RED GND H 7 RED GREEN GND J 8 GREEN BLUE GND K 9 BLUE L 10 AUDIO GND M 11 AUDIO 2 N 12 AUDIO 1 Table 1-1 Game Price Options ------------------------------------------------------------------------------- Settings of 8-Toggle Switch on Gravitar PCB (at B4) 8 7 6 5 4 3 2 1 Option ------------------------------------------------------------------------------- Off On Free play On On 1 coin for 2 credits Off Off 1 coin for 1 credit < On Off 2 coins for 1 credit Off Off Right coin mechanism x 1 < On Off Right coin mechanism x 4 Off On Right coin mechanism x 5 On On Right coin mechanism x 6 Off Left coin mechanism x 1 < On Left coin mechanism x 2 Off Off Off No bonus coins < Off On Off For every 4 coins inserted, logic adds 1 more coin On On Off For every 4 coins inserted, logic adds 2 more coins Off Off On For every 5 coins inserted, logic adds 1 more coin On Off On For every 3 coins inserted, logic adds 1 more coin Off On On No bonus coins On Off Off ??? (not in manual!) On On On No bonus coins ------------------------------------------------------------------------------- < Manufacturer's recommended setting Table 1-2 Special Options ------------------------------------------------------------------------------- Settings of 4-Toggle Switch on Gravitar PCB (at P10/11) 4 3 2 1 Option ------------------------------------------------------------------------------- On Credits counted on one coin counter Off Credits counted on two separate coin counters ------------------------------------------------------------------------------- Table 1-3 Game Play Options ------------------------------------------------------------------------------- Settings of 8-Toggle Switch on Gravitar PCB (at D4) 8 7 6 5 4 3 2 1 Option ------------------------------------------------------------------------------- On On No bonus Off Off Bonus ship every 10,000 points < d d d On Off Bonus ship every 20,000 points e e e Off On Bonus ship every 30,000 points s s s U U On U Easy game play < Off Hard game play t t t o o Off Off o 3 ships per game N N On Off N 4 ships per game < Off On 5 ships per game On On 6 ships per game ------------------------------------------------------------------------------- < Manufacturer's recommended setting