Sega System 2
From Sega Retro
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| Sega System 2 | |||||
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| Manufacturer: Sega | |||||
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The Sega System 2 is an arcade platform introduced by Sega in 1985. It is a "successor" to the Sega System 1 though is in fact largely identical, utilising the same Z80 CPU and the same sound chips. The only major differences between the System 1 and the System 2 is the addition of a ROM board and a larger 512×512 background scrolling plane.
The System 2 was supported alongside the System 1, with its last game being released in 1988.
Technical Specifications
- Board composition: Main board & ROM board
- Main CPU: Zilog Z80 @ 4 MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
- Sound CPU: Zilog Z80 @ 4 MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
- Sound chips: Sega SN76496 @ 4 MHz, Sega SN76496 @ 2 MHz
- GPU chipset: Sega 315-5011 (sprite line comparator), Sega 315-5012 (sprite generator), 315-5049 (tilemap chip)
- Video resolution: 256×224 (display), 640×260 (overscan)
- Refresh rate: 60.0952 Hz (V-sync)
- Color palette: 4096
- Colors on screen: 2048
- Tilemap planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
- Tilemap sizes: 512×512 for scrolling plane and 256×256 for fixed plane[1]
- Sprites: Dual line buffers, double buffering, 32 sprites per scanline, 16 colors per sprite, sprite flipping, hardware collision detection
- Sprite sizes: 8 to 256 pixels width, 8 to 256 pixels height
- Pixel clock cycles: 10 MHz (60.0952 Hz refresh rate)
- Sprite pixel/texel fillrate: 10 million pixels/texels per second, 166,402 pixels/texels per frame (260 scanlines), 640 sprite pixels/texels per scanline
Gallery
PCB
List of Games
- Heavy Metal (1985)
- Choplifter (1985)
- Shooting Master (1985)
- 119 (1986)
- Warball (1986)
- Wonder Boy (also released on Sega System 1) (1986)
- Dakkochan House (1987)
- Toki no Senshi: Chrono Soldier (1987)
- Wonder Boy in Monster Land (1987)
- UFO Senshi Youko Chan (1988)
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