Sega System 18

From Sega Retro

System18 mainPCB.jpg
Sega System 18
Manufacturer: Sega
Variants: System 16, System C, Mega-Tech System, Mega Play, Mega Drive
Release Date RRP Code
Arcade
World
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The Sega System 18 (セガ システム 18) is an arcade system board released by Sega in 1989. The System 18 is primarily a soup-ed System 16, offering superior sound, more tile layers and extra graphics options.

System 18 boards had a very short run of games but most adhere to JAMMA standard, unlike previous systems. Most of these games also have the "suicide battery" as associated with Sega's System 16 hardware. It also contains the VDP used by the Sega Mega Drive console.

Technical specifications

  • Graphics chips:
  • 16-bit color palette: 15-bit RGB high color depth (32,768 colors) and 1-bit shadow & highlight that triples up to 98,304 colors
  • Colors on screen: 4096 (unique colors) to 8384 (with shadow & highlight)[1]
  • Graphical capabilities: 128 sprites on screen at one time, 4 tile layers, 1 text layer, 1 sprite layer with hardware sprite zooming, translucent shadows, sprites of any height and length, row & column scrolling

List of games

Photo gallery

References


Sega arcade boards
Originating in arcades









Console-based hardware








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PC-based hardware








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