• Lost World
• Strikes & Spares
• Super Sonic
• $6 Million man
• Playboy
• Star Trek
• Kiss
• Paragon
• Harlem Globetrotters
• Nitro Groundshaker
• Dolly Parton
• Future Spa
• Silverball Mania
• Space Invader
• Rolling Stones
• Mystic
• Viking
• Hot Doggin'
• Xenon
• Frontier
• Flash Gordon
• 8 Ball Deluxe and 8BD Limited Edition
• Fireball II
• Embryon
• Fathom
• Medusa
• Centaur
• Elektra
• Vector
• Spectrum
• Rapid Fire
• Mr. & Mrs. Pac Man
• Speakeasy
• B.M.X.
• Granny & the Gators
• Goldball
• X's & O's
• Black Pyramid
• Fireball Classic
• Cybernaut
• Grand Slam
• Baby Pacman
• Kings of steel
• Centaur II
• Spy Hunter

Both the early and the late MPU boards use JUMPER wires which can be moved to change the way that the processor chip addresses the information contained in the ROM chips. These READ-ONLY-MEMORY chips contain the maps of the playfield and the switch matrix, the layout of the solenoid coils, as well as the 'rules of the game'. When these games were first produced, it was cost effective to have the ROMs produced in large numbers with the program imprinted permanently on the chip. These devices, called MASKED ROMS, can not be erased or re-programmed. They require a particular JUMPER combination to run. If any one of the jumpers is missing or misplaced, the board simply will not work. To confuse matters, it is now possible to purchase replacement ROMs on EPROM, or ERASABLE-PROGRAMMABLE-READ-ONLY-MEMORY. The only difference between the MASKED ROM and the EPROM is the ADDRESSING neccessary for the computer to read the chip. Therefore, it becomes neccessary to change the JUMPERS when changing chips, whether you are putting a different game on a particular board, or simply replacing failed original chips. The following JUMPER CHART explains how to get any particular device to run in any given MPU board. NOTE: Connection points on the circuit board all have the prefix "E".

BALLY 2518-17 EARLY MPU WITH:

*9316A in U2 & 9316A in U6 USE JUMPERS 1-2, 3-4, 6-7

*2716 in U2 9316A in U6 USE JUMPERS 1-2, 3-4, 6-7
BECAUSE THE EARLY BOARD DID NOT HAVE JUMPERS FOR 2716 EPROMS, YOU MUST PERFORM THE FOLLOWING MODIFICATION TO THE BOARD:
Component side of board: Cut the trace from {U2 pin 18} to {U3 pin 18} where it passes between sockets U2 & U3. Solder side of board: Run a jumper from {U2 pin 18} to {U17 pin 11}. Cut the trace going to {U2 Pin 21}. Jump from Pin 21 to Pin 24 (+5 Volts) on U2.

*2716 in U2 2716 in U6 = 1-2, 3-4, 6-7
PERFORM THE FOLLOWING MODIFICATION:
Component side of board: Cut pin 4 away from U18;
Solder side of board: Short pin 4 to pin 5 on U18 with a solder blob; Cut the trace at Pin 21 on both U2 & U6. Run a jumper from Pin 21 to Pin 24 on both.

BALLY 2518-35 MPU WITH:

Note: When connecting jumper 13A to 14 or 19, be certain to cut 13-15.

• *9316A in U1 (or NO U1) 9316A in U2 9316A in U6
• 1-4, 2-6, 7-8, 9-11, 12-36, 13-15, 16A-19, 31-32, 33-34
  
  
• *9316A in U1 9316A in U2 2716 in U6
• 1-4, 2-6, 7-8, 9-11, 12-36, 13A-19, 16A-18, 31-32, 33-35
  
  
• *No U1 2716 in U2 9316A in U6
• 1-5, 2-4, 7-8, 10-12, 11-29, 13A-14, 16A-19, 31-32, 33-34
  
  
• *No U1 2716 in U2 2716 in U6
• 1-5, 2-4, 7-8, 10-12, 11-29, 13A-14, 16A-18, 31-32, 33-35
  
  
• *2716 in U1 2716 in U2 2716 in U6
• 1-5, 2-4, 7-8, 10-12, 11-25, 13A-14, 16A-18, 31-32, 33-35
  
  
• *2716 in U1 2716 in U2 9316A in U6
• 1-5, 2-4, 7-8, 10-12, 11-25, 13A-14, 16A-19, 31-32, 33-34
  
  
• *2716 in U1 2716 in U2 2532 or 9332 in U6
• 1-5, 2-4, 7-8, 10-12, 11-25, 13A-14, 16A-34, 29-33, 31-32
  
  
• *No U1, 2532 or 9332 in U2, 2532 or 9332 in U6
• 4-12, 7-8, 10-11, 13A-14, 16A-34, 29-33, 31-32
  
  
• *No U1, 2532 or 9332 in U2, 2732 in U6
• 4-12, 7-8, 10-11, 13A-14, 16A-29, 31-32, 33-35
  

• Any Single chip ........................................................ $25.
  
• Any Two chips from the same game; ( add $20)= total $45.
  
• All Three chips from the same game; (add $15)= total $60.
  
• All Four chips from Stern 200 games; (add $10)= total $70.
  

Unfortunately, many of these original boards have battery leakage corrosion damage. We work on these board every day, and we give free repair estimates if you'd like to send your board to us. CLICK HERE to read more about it.

If you are missing your MPU or yours is corroded beyond repair, we stock