Bally AS-2518-51 Sound board (also known as Sound Module A8, Assembly AS-3022-X where X is the board number related to the game) with custom sound ROM at U4. Used board, rebuilt and tested board with all new electrolytic capacitors and repairs done as needed. Sample board shown. $20 credit for returned boards in good condition, leg corrosion on socketted ICs being the main sore spot. Please use the information below only to help determine the origin of your board, all boards are believed identical except for U4 and jumpers
BMX (AS-3022-15, U4=E888-02), Frontier (AS-3022-12, U4=E819-09), Future Spa (AS-3022-1, U4=E781-5), Gold Ball (A084-91495-A371, U4=???), Grand Slam (AS-3022-18, U4=???), Hotdoggin’ (AS-3022-9, U4=E809-07), Mystic (AS-3022-7, U4=E798-05), Nitro Ground Shaker (AS-3022-2, U4=E776-15), Rolling Stones AS-3022-5, U4=E796-19), Silverball Mania (AS-3022-3, U4=E786-11), Skateball (AS-3022-11, U4=E823-14), Space Invaders (AS-3022-6, U4=E792-07), Speakeasy (AS-3022-14, U4=E877-1), Viking (AS-3022-8, U4=E802-07)