List of Sega Arcade System Boards - Sega System 1

Sega System 1 was a type of arcade hardware used in various Sega arcade machines from 1983 until 1987. For most of its run it coexisted with Sega System 2 (1985–1988) and as a result had many similar features (the only major difference being that System 2 had two separate circuit boards instead of one). In its four year span it was used in some 20 different arcade games including Choplifter, Flicky, Pitfall II: Lost Caverns, Wonder Boy, and Wonder Boy in Monster Land.