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. While it is a successor to the Sega System 1, it is in fact largely an upgrade, utilising the same Z80 CPU and the same sound chips. The major upgrades of the System 2 are the addition of a ROM board, faster RAM, 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
- MCU: Intel 8751[1]
- RAM: 82 KB, including 32.5 KB high-speed SRAM (Static RAM) [1][2]
- Main: 4 KB
- Video: 12 KB (4 KB video, 2 KB sprites, 2 KB palette, 4 KB collision)
- Sound: 2 KB
- MCU: 64 KB
- 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[2]
- 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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