![]() Jumpers around the U1 socket, for using two 2732 EPROMs: Jump E12 to GND (large GND trace next to the ROM sockets).Just download the above file andĮxpand it, and burn your game into 2732 EPROMs. One set of Jumpers for a -35 MPU using 2732 EPROMs.įor the -35 MPU board, using all 2732 for ANY game has the advantage Using these files will allow you to use a -35 MPUīoard for ANY Bally game from 1977 to 1985. Only Baby Pacman and Granny and the Gators ROMs are missing from The original program size and code is still available from Williams atīut I highly suggest you down load the ZIP fileĪll the Bally ROMs for all games from Freedom (1977) to Cybernaut (1985), and has been Has been re-formated to fit this size EPROM. This really makes sense as the largest EPROMs that willįit the -35 MPU board are 2732's, which are commonly andĬheaply available. Themselves to the board (instead of the other way around). To use the largest EPROM size, and cater the EPROMs Set of ROMs, the best idea is to maximize the board So instead of custom jumpering a board to a particular The traces and jumpers start to lift and strip off theīoard. To fail, and MPU boards are shifted from game to game.Īn MPU board can only be jumpered so many times before Jumpering is not a big problem until the MPU's ROM chips begin Max out ROM Memory on the -35 MPU to use 2732 EPROMs. MPU board, J5 will have 33 pins (including the removed "key" pin). Way to tell (besides looking at the silkscreened part number on (remember the -133 is really a -35 board with R113 changed to a diode CR52). MPU board working first before proceeding.Īlso of course, make sure the board being worked on is a AS-2518-35 (or AS-2518-133) MPU That the jumpers are correct for the ROMs installed. If the MPU board is jumpered incorrectlyįor the game ROMs installed, the diagnostic LED light will stay It is EXTREMELY important that you have a working MPU boardīefore you change any jumper locations! If the MPU boardĬurrently has ROMs in it, get it working first before playing Important: Before you Change any Jumpers!! When things don't work: -35/-133 MPU Game ROMs, EPROMs, and Locked-on or Not Working Feature Lights (Lamp Driver board)ģd. ![]() Locked-on or Not Working Coils (Solenoid Driver board). ![]()
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