By: Bally Midway Released: 1980 Display: Vertical (Cocktail or Upright) Pinout: 22-pin Custom CPU: Z80 Input: 4-Way Joystick Players: 2 (alternating) Identifying Marks: "Jr. PACMAN (FIELD-KIT) silk-screen'd on PCB. This is the last of the PacMan series of games to be created. It is the only one with a scrolling maze. The game features 8 mazes. My PCB has been converted to JAMMA by performing the modifications below. (A..Z is on component side, 1..22 is on solder side). A and 1 are nearest the heatsink. Letter Pins go ABCDEFHJKLMNPRSTUVWXYZ JAMMA Conversion: *** I take no responsibility if the conversion causes damage to your game! This is the way I modified my PCB. Your PCB may be different. Remove Q50 (transistor attached to large heatsink) Remove IR1 (4-pin transistor-like device) Provide +5V to: C,D,3,4,5,18 Provide +12V to: W,X,19,20 Provide GND to: A,B,Y,Z,1,2,15,21,22 Speaker: Pin-F = positive, Pin-H = negative. Credit Switch: Pin-9 1P Start: Pin-L, 2P Start: Pin-10 1P Left: Pin-M, 2P Left: Pin-P 1P Right: Pin-11, 2P Right: Pin-13 1P Up: Pin-N, 2P Up: Pin-12 1P Down: Pin-14, 2P Down: Pin-V Above switches (1P/2P-U/D/L/R, and credit switch) all must return to GND on their other pins. If you want the game in cocktail-mode, tie Pin-R to GND. Otherwise, leave it unconnected. Video: VideoGND = Pin-S, VideoR = Pin-T, VideoG = Pin-16, VideoB = Pin-U, VideoSYNC = Pin-17 When you power-up your game, adjust your power supply so that you see between +4.90V and +5.00V across chip 10D Pins 7 and 14. If voltage is low, the game may act strangely. Mine had a corrupted maze for player-2, and eating the tricycle with player-1 would not work properly. Needless to say, too much voltage will toast your game.