Difference between revisions of "Sega System 2"

From Sega Retro
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===Memory===
 
===Memory===
 
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* Memory: 128.5 KB (100 KB main, 238.5 KB video, 34 KB sound)
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* Memory: 385.5 KB (100 KB main, 238.5 KB video, 34 KB sound)
 
* [[RAM]]: 32.5 [[Byte|KB]] [[SRAM]]{{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
 
* [[RAM]]: 32.5 [[Byte|KB]] [[SRAM]]{{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
 
** Main: 4 KB
 
** Main: 4 KB

Revision as of 03:01, 6 October 2016

System2 PCB.jpg
Sega System 2
Manufacturer: Sega
Release Date RRP Code

The Sega System 2 is an arcade platform introduced by Sega in 1985. It is a successor to the Sega System 1, though largely an upgrade, utilising the same Zilog Z80 CPU, sound chips, and Sega graphics chipset. 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

See Sega System 1 Specifications for details on underlying System 1 specifications. The following are changes that System 2 made to System 1 specifications.

  • Board composition: Main Board + ROM Board
  • Tilemap planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
    • Tilemap sizes: 512×512 for scrolling plane, 256×256 for fixed plane[1]

Memory

  • Memory: 385.5 KB (100 KB main, 238.5 KB video, 34 KB sound)
  • RAM: 32.5 KB SRAM[2]
    • Main: 4 KB
    • Video: 13.5 KB (4 KB video, 2 KB sprite attributes, 1.5 KB sprite line buffers, 2 KB palette, 4 KB collision)
    • Sound: 2 KB
  • ROM: 353 KB[3]
    • Main: 96 KB
    • Video: 225 KB (96 KB tiles, 128 KB sprites, 1 KB palette)
    • Sound: 32 KB

Gallery

  • PCB

List of Games

References

  1. ↑ https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp
  2. ↑ https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp
  3. ↑ Heavy Metal (MAME)


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