Difference between revisions of "Sega X Board"

From Sega Retro
m (Text replacement - " {{ref|" to "{{ref|")
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* Sound chips:
 
* Sound chips:
 
** FM synthesis chip: [[Yamaha]] [[YM2151]] @ 4 MHz (8 FM channels)
 
** FM synthesis chip: [[Yamaha]] [[YM2151]] @ 4 MHz (8 FM channels)
−
** PCM sampling chip: SegaPCM (315-5218) @ 4 MHz {{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}} (stereo output, 16 PCM channels, 12-bit audio, 31.25 kHz sampling rate)
+
** PCM sampling chip: SegaPCM (315-5218) @ 4 MHz{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}} (stereo output, 16 PCM channels, 12-bit audio, 31.25 kHz sampling rate)
−
* Graphics processing unit: Sega Super Scaler chipset @ 50 MHz {{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
+
* Graphics processing unit: Sega Super Scaler chipset @ 50 MHz{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
 
** Main graphics chips: 315-5197 tilemap generator, 315-5211A sprite generator, 315-5242 color encoder, 315-5275 road generator, 315-5278 sprite ROM bank control
 
** Main graphics chips: 315-5197 tilemap generator, 315-5211A sprite generator, 315-5242 color encoder, 315-5275 road generator, 315-5278 sprite ROM bank control
 
** Math chips: 315-5248 hardware multiplier, 315-5249 hardware divider
 
** Math chips: 315-5248 hardware multiplier, 315-5249 hardware divider
 
* Memory: Up to 4586 KB (1180 KB main, 2940 KB video, 466 KB sound)
 
* Memory: Up to 4586 KB (1180 KB main, 2940 KB video, 466 KB sound)
−
** [[RAM]]: 802 KB, including 710 KB high-speed [[SRAM]] (Static RAM) {{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}{{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}
+
** [[RAM]]: 802 KB, including 710 KB high-speed [[SRAM]] (Static RAM){{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}{{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}
 
*** Main RAM: 148 KB (52 KB work/program SRAM, 32 KB work/mirror RAM, 32 KB IC31, 32 KB IC32)
 
*** Main RAM: 148 KB (52 KB work/program SRAM, 32 KB work/mirror RAM, 32 KB IC31, 32 KB IC32)
 
*** [[VRAM|Video RAM]]: 636 KB SRAM
 
*** [[VRAM|Video RAM]]: 636 KB SRAM
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*** Sound RAM: 18 KB SRAM (2 KB Z80 program, 16 KB SegaPCM chip)
 
*** Sound RAM: 18 KB SRAM (2 KB Z80 program, 16 KB SegaPCM chip)
 
*** SRAM speed: 45 [[wikipedia:Nanosecond|nanoseconds]] {{fileref|HM62256B datasheet.pdf}}
 
*** SRAM speed: 45 [[wikipedia:Nanosecond|nanoseconds]] {{fileref|HM62256B datasheet.pdf}}
−
** [[ROM]]: Up to 3784 KB (1032 KB main, 2304 KB video, 448 KB sound) {{ref|[http://www.mamedb.com/game/thndrbld Thunder Blade (MAME)]}}
+
** [[ROM]]: Up to 3784 KB (1032 KB main, 2304 KB video, 448 KB sound){{ref|[http://www.mamedb.com/game/thndrbld Thunder Blade (MAME)]}}
−
* Video resolution: 320×224 (display), 400×262 (overscan) {{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
+
* Video resolution: 320×224 (display), 400×262 (overscan){{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
 
** Scanlines: 224 (display), 262 (overscan), progressive scan
 
** Scanlines: 224 (display), 262 (overscan), progressive scan
 
** Framebuffer resolution: 512×256 pixels
 
** Framebuffer resolution: 512×256 pixels
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* [[Palette|Color palette]]: 98,304
 
* [[Palette|Color palette]]: 98,304
 
** 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.
 
** 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: 24,576 {{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
+
* Colors on screen: 24,576{{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
 
* Graphical layers:
 
* Graphical layers:
 
** 4 tile planes
 
** 4 tile planes
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** 1 road plane: Can draw 2 roads at once
 
** 1 road plane: Can draw 2 roads at once
 
** Translucent shadows
 
** Translucent shadows
−
* [[Sprite|Sprite]] plane: Dual sprite framebuffers, hardware sprite zooming, sprite/texture rotation, [http://www.giantbomb.com/ray-casting/3015-1517/ ray casting] {{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}{{ref|[http://arcadeheroes.com/2013/06/28/the-short-lived-life-of-first-person-arcade-shooting-games/ The Brief Life of Arcade First Person Shooting Games]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
+
* [[Sprite|Sprite]] plane: Dual sprite framebuffers, hardware sprite zooming, sprite/texture rotation, [http://www.giantbomb.com/ray-casting/3015-1517/ ray casting]{{ref|[http://cgfm2.emuviews.com/txt/loftech.txt Sega X Board Hardware Notes]}}{{ref|[http://arcadeheroes.com/2013/06/28/the-short-lived-life-of-first-person-arcade-shooting-games/ The Brief Life of Arcade First Person Shooting Games]}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
 
** Sprite/texture sizes: 8×8 to 512×256 pixels
 
** Sprite/texture sizes: 8×8 to 512×256 pixels
 
** Colors per sprite/texture: 16
 
** Colors per sprite/texture: 16
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===''Super Monaco GP'' Specifications===
 
===''Super Monaco GP'' Specifications===
−
''[[Super Monaco GP]]'' featured the following upgrades in 1989: {{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
+
''[[Super Monaco GP]]'' featured the following upgrades in 1989:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaxbd.cpp Sega X-Board Hardware (MAME)]}}
  
 
{{multicol|
 
{{multicol|
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*** Link/Network board: 10 KB SRAM (8 KB SRAM, 2 KB [[wikipedia:Dual-ported RAM|Dual-Port]] SRAM)
 
*** Link/Network board: 10 KB SRAM (8 KB SRAM, 2 KB [[wikipedia:Dual-ported RAM|Dual-Port]] SRAM)
 
*** Motor board: 12 KB
 
*** Motor board: 12 KB
−
** [[ROM]]: Up to 4232 KB (1032 KB main, 2304 KB video, 832 KB sound, 32 KB comm, 32 KB motor) {{ref|[http://mamedb.com/game/smgp Super Monaco GP (MAME)]}}
+
** [[ROM]]: Up to 4232 KB (1032 KB main, 2304 KB video, 832 KB sound, 32 KB comm, 32 KB motor){{ref|[http://mamedb.com/game/smgp Super Monaco GP (MAME)]}}
 
* Sound output: 4-channel surround sound
 
* Sound output: 4-channel surround sound
 
}}
 
}}

Revision as of 21:16, 7 September 2016

Notavailable.svg
Sega X Board
Manufacturer: Sega
Release Date RRP Code

The Sega X Board is an arcade system board released by Sega in 1987 as a successor to Sega OutRun hardware. It debuted with After Burner and Thunder Blade.

The X Board specification is an expansion of the OutRun hardware, with more memory, and a more powerful GPU chipset, allowing for twice as many sprites/textures on screen at once, twice as many tile layers, a faster fillrate, more colors, and sprite/background rotation effects. The contents have also been condensed onto a single board, making it slightly easier to manufacture.

The X Board was the third in the Super Scaler series of arcade hardware, and would be succeeded by the Y Board and System 32, before the Model 1 made polygonal 3D arcade games more viable and financially affordable.

Hardware

As the third in Sega's Super Scaler series of arcade hardware (after the Sega Hang-On hardware and Sega OutRun hardware), it was noteworthy for its sprite/texture manipulation capabilities, which allowed it to create high quality three-dimensional visuals, such as the scaling and rotating environments in 1987's After Burner, and the ray casting like environments in 1988's Last Survivor and 1989's Line of Fire. This trend would continue with the Y Board and the System 32, before the Model 1 made true polygonal 3D arcade games more financially affordable.

Technical Specifications

X Board Specifications

  • Board composition: Single board
  • CPU:
  • Sound chips:
    • FM synthesis chip: Yamaha YM2151 @ 4 MHz (8 FM channels)
    • PCM sampling chip: SegaPCM (315-5218) @ 4 MHz[1] (stereo output, 16 PCM channels, 12-bit audio, 31.25 kHz sampling rate)
  • Graphics processing unit: Sega Super Scaler chipset @ 50 MHz[1]
    • Main graphics chips: 315-5197 tilemap generator, 315-5211A sprite generator, 315-5242 color encoder, 315-5275 road generator, 315-5278 sprite ROM bank control
    • Math chips: 315-5248 hardware multiplier, 315-5249 hardware divider
  • Memory: Up to 4586 KB (1180 KB main, 2940 KB video, 466 KB sound)
    • RAM: 802 KB, including 710 KB high-speed SRAM (Static RAM)[1][2]
      • Main RAM: 148 KB (52 KB work/program SRAM, 32 KB work/mirror RAM, 32 KB IC31, 32 KB IC32)
      • Video RAM: 636 KB SRAM
        • CPU: 92 KB (64 KB background tiles, 12 KB roads, 4 KB sprites, 4 KB text, 16 KB color)
        • 315-5211A: 520 KB (8 KB dual sprite banks, 512 KB dual sprite framebuffers)
        • Other: 20 KB (4 KB sprites, 4 KB roads, 12 KB text)
      • Sound RAM: 18 KB SRAM (2 KB Z80 program, 16 KB SegaPCM chip)
      • SRAM speed: 45 nanoseconds [3]
    • ROM: Up to 3784 KB (1032 KB main, 2304 KB video, 448 KB sound)[4]
  • Video resolution: 320×224 (display), 400×262 (overscan)[2][1]
    • Scanlines: 224 (display), 262 (overscan), progressive scan
    • Framebuffer resolution: 512×256 pixels
  • Refresh rate: 59.6368 to 60 Hz (V-sync)
    • Frame rate: 59.6368 to 60 frames per second
  • Color palette: 98,304
    • 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: 24,576[2][1]
  • Graphical layers:
    • 4 tile planes
    • 1 text plane
    • 1 sprite plane
    • 1 road plane: Can draw 2 roads at once
    • Translucent shadows
  • Sprite plane: Dual sprite framebuffers, hardware sprite zooming, sprite/texture rotation, ray casting[2][5][1]
    • Sprite/texture sizes: 8×8 to 512×256 pixels
    • Colors per sprite/texture: 16
    • Sprites/textures on screen: 256 on screen at one time per frame, 15,267 to 15,360 scaled per second
    • Video clock cycles: 50 MHz
    • Sprite fillrate: 50 million pixels/texels per second
    • Sprite pixels/texels per frame: 833,333 (at 60 Hz) to 838,408 (at 59.6368 Hz)
    • Sprite pixels/texels per scanline: 3180 to 3200 sprite pixels/texels per scanline
    • Sprites/textures per scanline: 256

Super Monaco GP Specifications

Super Monaco GP featured the following upgrades in 1989:[1]

  • Board composition: Main board + Link/Network board + Sound board + Motor board
  • CPU:
    • Main CPU: Hitachi FD1094 @ 12.5 MHz, Motorola MC68000 @ 12.5 MHz (16-bit & 32-bit instructions @ 4.375 MIPS)
    • Sound CPU: 2× Zilog Z80 @ 4 MHz (8-bit & 16-bit instructions @ 1.16 MIPS)
    • Comm CPU: Zilog Z80 @ 8 MHz (1.16 MIPS)
    • Motor CPU: Zilog Z80 @ 8 MHz (1.16 MIPS)
  • Sound chips:
    • FM synthesis chip: Yamaha YM2151 @ 4 MHz (8 FM channels)
    • PCM sampling chips: 2× SegaPCM (315-5218) @ 4 MHz (stereo output, 32 PCM channels, 12-bit audio, 31.25 kHz sampling rate)
  • Memory: Up to 5064 KB (1180 KB main, 2940 KB video, 858 KB sound, 42 KB comm/link/network, 44 KB motor)
    • RAM: 832 KB, including 720 KB high-speed SRAM (Static RAM)
      • Main RAM: 148 KB (52 KB work/program SRAM, 32 KB work/mirror RAM, 32 KB IC31, 32 KB IC32)
      • Video RAM: 636 KB SRAM
      • Sound RAM: 26 KB, including 18 KB SRAM
      • Link/Network board: 10 KB SRAM (8 KB SRAM, 2 KB Dual-Port SRAM)
      • Motor board: 12 KB
    • ROM: Up to 4232 KB (1032 KB main, 2304 KB video, 832 KB sound, 32 KB comm, 32 KB motor)[6]
  • Sound output: 4-channel surround sound

List of Games

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Sega X-Board Hardware (MAME)
  2. ↑ 2.0 2.1 2.2 2.3 Sega X Board Hardware Notes
  3. ↑ File:HM62256B datasheet.pdf
  4. ↑ Thunder Blade (MAME)
  5. ↑ The Brief Life of Arcade First Person Shooting Games
  6. ↑ Super Monaco GP (MAME)


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