Difference between revisions of "Sega System 1"

From Sega Retro
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{{multicol|
 
{{multicol|
 
* Graphics chipset:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
 
* Graphics chipset:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
−
** Sega 315-5011 sprite line comparator: 9.99991 MHz [[SRAM]] (100 ns){{fileref|Regulus System1 US Manual.pdf|page=8}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
+
** Sega 315-5011 sprite line comparator: 16‑bit line buffer RAM (14.999865 MHz, 29.99973 MB/s),{{fileref|Regulus System1 US Manual.pdf|page=8}}{{fileref|HangOn Schematics.pdf|page=4}} 9.99991 MHz sprite line buffer render/pixel clock, 4.999955 MHz sprite line buffer scan/erase clock{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}{{intref|Sega Pre-System 16 hardware notes (2004-03-29)}}
 
** Sega 315-5012 sprite generator
 
** Sega 315-5012 sprite generator
 
** Sega 315-5049 tilemap generator
 
** Sega 315-5049 tilemap generator
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* [[Palette|Color palette]]: 4096{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}
 
* [[Palette|Color palette]]: 4096{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}
 
** Colors on screen: 2048{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
 
** Colors on screen: 2048{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
−
* [[Sprite]] plane: Line buffer, double buffering, 32 sprites on screen, 16 colors per sprite, sprite flipping, hardware collision detection{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
+
* [[Sprite]] plane: Line buffer, double buffering, 16 colors per sprite, sprite flipping, hardware collision detection{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
 +
** Sprites on screen: 128 sprites (2 KB sprite attributes, 2 bytes per sprite){{intref|Sega Pre-System 16 hardware notes (2004-03-29)}}
 
** Sprite sizes: 8×8 to 256×224 [[texel]]s
 
** Sprite sizes: 8×8 to 256×224 [[texel]]s
−
** Line buffer [[fillrate]]: 6.55381 [[Pixel|MPixels/s]]
+
** Line buffer [[fillrate]]: 9.99991 [[Pixel|MPixels/s]]
−
** Texels per scanline: 384 (active scanlines) to 640 (VBlank scanlines)
+
** Sprites per scanline: 32 sprites, 640 texels
−
** Sprites per scanline: 32
 
 
* Background planes: 2 [[Tile Layer|tilemap]] layers (1 static, 1 scrolling), 8×8 tiles{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
 
* Background planes: 2 [[Tile Layer|tilemap]] layers (1 static, 1 scrolling), 8×8 tiles{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
 
** Tilemap sizes: 256×256 for both planes
 
** Tilemap sizes: 256×256 for both planes
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====Memory====
 
====Memory====
 
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{{multicol|
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* Memory: 154.25 [[Byte|KB]] (52 KB main, 92.25 KB video, 10 KB sound)
+
* Memory: 155.75 [[Byte|KB]] (52 KB main, 93.75 KB video, 10 KB sound)
−
* [[RAM]]: 18 KB{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
+
* [[RAM]]: 19.5 KB{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp Sega System 1 / System 2 (MAME)]}}
 
** Main: 4 KB
 
** Main: 4 KB
−
** [[VRAM|Video]]: 12 KB (4 KB video, 2 KB sprites, 2 KB palette, 4 KB collision)
+
** [[VRAM|Video]]: 13.5 KB [[SRAM]] (4 KB video, 2 KB sprite attributes, 1.5 KB sprite line buffers,{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/video/system1.cpp System1 / System 2 video hardware (MAME)]}}{{intref|Sega Pre-System 16 hardware notes (2004-03-29)}} 2 KB palette, 4 KB collision)
 
** Sound: 2 KB
 
** Sound: 2 KB
 
* [[ROM]]: 136.25 KB{{ref|[http://www.mamedb.com/game/starjack Star Jacker (MAME)]}}
 
* [[ROM]]: 136.25 KB{{ref|[http://www.mamedb.com/game/starjack Star Jacker (MAME)]}}

Revision as of 02:22, 6 October 2016

System1 PCB1.jpg
Sega System 1
Manufacturer: Sega
Release Date RRP Code

The Sega System 1 is an arcade platform officially debuted by Sega in 1983,[1] based on earlier 1982 prototype hardware. It is a Z80-based platform and the first in the decade-long "System" series of arcade boards.

The System 1 was a relatively popular arcade board for its day, supported not only by Sega, but by Japanese developers Coreland and VIC Tokai between 1983 and 1987. In 1985 it was succeeded by the slightly more powerful Sega System 2 board, though new games were released for both systems concurrently. Many of the System 1's games were ported to the SG-1000 and Sega Master System consoles.

Specifications

System 1

  • Board composition: One board
    • Master clock rate: 19.99982 MHz[2]
  • Main CPU: Zilog Z80 @ 4 MHz (8/16-bit instructions, 0.58 MIPS)
  • Sound CPU: Zilog Z80 @ 4 MHz (8/16-bit instructions, 0.58 MIPS)
  • Sound chips: Sega SN76496 @ 4 MHz, Sega SN76496 @ 2 MHz
  • MCU: Intel 8751[2]

Graphics

  • Graphics chipset:[2]
    • Sega 315-5011 sprite line comparator: 16‑bit line buffer RAM (14.999865 MHz, 29.99973 MB/s),[3][4] 9.99991 MHz sprite line buffer render/pixel clock, 4.999955 MHz sprite line buffer scan/erase clock[2][5]
    • Sega 315-5012 sprite generator
    • Sega 315-5049 tilemap generator
  • Video resolution: 256×224 (active), 640×260 (overscan)[2]
    • Scanlines: 260 (224 active, 36 VBlank)
    • Pixel clock rate: 9.99991 MHz (3.446099 MHz active, 6.55381 MHz HBlank/VBlank)
    • Refresh rate: 60.0952 Hz (VSync)
  • Color palette: 4096[6]
    • Colors on screen: 2048[2]
  • Sprite plane: Line buffer, double buffering, 16 colors per sprite, sprite flipping, hardware collision detection[6][2]
    • Sprites on screen: 128 sprites (2 KB sprite attributes, 2 bytes per sprite)[5]
    • Sprite sizes: 8×8 to 256×224 texels
    • Line buffer fillrate: 9.99991 MPixels/s
    • Sprites per scanline: 32 sprites, 640 texels
  • Background planes: 2 tilemap layers (1 static, 1 scrolling), 8×8 tiles[6][2]
    • Tilemap sizes: 256×256 for both planes

Memory

  • Memory: 155.75 KB (52 KB main, 93.75 KB video, 10 KB sound)
  • RAM: 19.5 KB[2]
    • Main: 4 KB
    • Video: 13.5 KB SRAM (4 KB video, 2 KB sprite attributes, 1.5 KB sprite line buffers,[6][5] 2 KB palette, 4 KB collision)
    • Sound: 2 KB
  • ROM: 136.25 KB[7]
    • Main: 48 KB
    • Video: 80.25 KB (48 KB tiles, 32 KB sprites, 256 bytes palette)
    • Sound: 8 KB

Prototype

Super Locomotive in 1982 ran on prototype arcade hardware that was very similar to the Sega System 1 later released in 1983. Super Locomotive had largely identical specifications, but with the following differences:[8][9][10]

Graphics

  • Graphics chipset:
    • Sega 315-5011 sprite line comparator
    • Sega 315-5012 sprite generator
  • Video resolution: 248×224 (active), 256×256 (overscan)
    • Pixel clock rate: 4 MHz
    • Refresh rate: 60 Hz
  • Color palette: 1568
    • Colors on screen: 768
  • Sprite plane:

Memory

  • Memory: 111.8125 KB (50 KB main, 51.8125 KB video, 10 KB sound)
  • RAM: 6.28125 KB
    • Main: 2 KB
    • Video: 2.28125 KB (1.75 KB video, 512 bytes sprites, 32 bytes scrolling)
    • Sound: 2 KB
  • ROM: 105.53125 KB[11]
    • Main: 48 KB
    • Video: 49.53125 KB (48 KB graphics, 1.53125 KB palette)
    • Sound: 8 KB

Gallery

  • PCB 1

  • PCB 2

List of Games

References

  1. ↑ 1983 Timeline (Sega Corporation)
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Sega System 1 / System 2 (MAME)
  3. ↑ File:Regulus System1 US Manual.pdf, page 8
  4. ↑ File:HangOn Schematics.pdf, page 4
  5. ↑ 5.0 5.1 5.2 Sega Pre-System 16 hardware notes (2004-03-29)
  6. ↑ 6.0 6.1 6.2 6.3 System1 / System 2 video hardware (MAME)
  7. ↑ Star Jacker (MAME)
  8. ↑ Super Locomotive (MAME)
  9. ↑ Super Locomotive video hardware (MAME)
  10. ↑ Sega Z80 Based Hardware (System 16)
  11. ↑ Super Locomotive (MAME)


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