Namco System 357 (Paperback)

High Quality Content by WIKIPEDIA articles! The earliest non-microprocessor based arcade system boards were designed around codeless state machine computers with the main board and any support boards consisting of discrete logic circuits comprising each element of the game itself. The next generation of arcade system boards, with the inclusion of microprocessor based technology, incorporated the game program code directly on the main system board via game code stored in ROM chips mounted on the main board.