Difference between revisions of "Sega Model 1"

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*** Video Board: 171.661376 MB/sec (5× 36 MHz) {{fileref|M5M5178AP datasheet.pdf}}{{fileref|HM65256B datasheet.pdf}}
 
*** Video Board: 171.661376 MB/sec (5× 36 MHz) {{fileref|M5M5178AP datasheet.pdf}}{{fileref|HM65256B datasheet.pdf}}
 
** Audio RAM: 19.073486 MB/sec (16-bit, 10 MHz) {{fileref|MB8464A datasheet.pdf}}
 
** Audio RAM: 19.073486 MB/sec (16-bit, 10 MHz) {{fileref|MB8464A datasheet.pdf}}
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* Internal DSP cache bandwidth: 305.175781 MB/sec (61.04&nbspMB/sec, 32-bit, 16 MHz, per DSP)
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* Internal DSP cache bandwidth: 305.175781 MB/sec (61.04 MB/sec, 32-bit, 16 MHz, per DSP)
 
* Game ROM bandwidth: 61.04 MB/sec (32-bit, 16 MHz) {{fileref|MB8316200B datasheet.pdf}}
 
* Game ROM bandwidth: 61.04 MB/sec (32-bit, 16 MHz) {{fileref|MB8316200B datasheet.pdf}}
 
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Revision as of 07:53, 22 November 2015

Model1 board.jpg
Sega Model 1
Manufacturer: Sega
Release Date RRP Code

The Sega Model 1 is an arcade system board released by Sega in 1992. It is the successor to the Sega System 32 arcade boards, and was succeeded by the Sega Model 2 series. It was Sega's first hardware designed for 3D polygon graphics.

Originally, the Model 1 was simply known as the CG Board, but was retroactively given the Model 1 name after work on the Model 2 began.

Hardware

It began development in 1990,[1] with Yu Suzuki's Sega AM2 team involved in its development from the drawing board.[2] The Model 1 was intended to compete with Namco's System 21; Namco was then the market leader in polygonal 3D video games, with titles such as Galaxian³ and Starblade.[3] The Model 1 was eventually released in 1992, debuting with Virtua Racing. While it was a significant improvement over the System 21, the Model 1 hardware was expensive, and only a few games were developed for the platform.

Contrary to popular opinion, Lockheed Martin was not involved with the development of the Model 1, but it was developed internally at Sega, before Lockheed Martin became involved with the development of the Sega Model 2, according to former Lockheed Martin employee, Real3D's Jon Lenyo, in 1998. [1]

Technical Specifications

Sound

  • Sound CPU: Toshiba TMP68000N-10 (68000) @ 12 MHz [4]
  • Sound chips: 2× Sega 315-5560 Custom MultiPCM
    • Audio capabilities: 28 PCM channels per chip (one for music, one for sound effects), 56 PCM channels total
  • Sound timer: Yamaha YM3834 @ 8 MHz

Graphics

  • GPU: [4][7]
    • Geometrizer coprocessors: 5× Fujitsu TGP MB86233 DSP @ 16 MHz (FPU, ALU) [8][9]
      • Coprocessor abilities: Floating decimal point operation function, axis rotation operation function, 3D matrix operation function, DMA, T&L (transform, clipping, lighting) [10]
      • Fixed-point arithmetic: 32-bit instructions @ 80 MIPS (16 MIPS each)
      • Floating-point unit: 32-bit operations @ 80 MFLOPS (16 MFLOPS each)
      • Bus width: 32-bit
      • DSP coprocessors located on Main Board
    • Rasterizer Video Board: Sega 837-7894 171-6080D Video PCB @ 36 MHz
      • Sega Custom chipset: 315-5422, 315-5423, 315-5424, 315-5425, 315-5292

Memory

  • Memory: Up to 39,166 KB (7008 KB main, 23,646 KB video, 8512 KB audio)
  • System RAM: 2776 KB (1896 KB high-speed SRAM) [4]
    • Main RAM: 480 KB (at least 156 KB SRAM)
      • Main Board: 324 KB (320 KB main, 4 KB comm)
      • Comm Board: 12 KB SRAM (8 KB SRAM, 4 KB Dual-Port SRAM) [11][12]
      • Other boards: 144 KB SRAM (128 KB Memory Board, 8 KB I/O Board, 8 KB Motor Board)
    • VRAM: 2232 KB (at least 1464 KB SRAM)
      • Main Board: 768 KB (128 KB display lists, 576 KB tiles, 64 KB color)
      • Video Board: 1464 KB SRAM
    • Audio RAM: 64 KB (16 KB SRAM)
  • Internal DSP cache: 30 KB (6 KB per DSP) [9]
  • System ROM: 1 MB EPROM (768 KB Memory Board, 64 KB I/O Board, 64 KB Motor Board, 128 KB Comm Board) [4]
  • Game ROM: Up to 35,336 KB MROM (5504 KB main, 21,384 KB video,[13] 8.25 MB audio)[14]

Bandwidth

  • System RAM bandwidth: 568.4 MB/sec [4]
    • Main RAM: 72.479248 MB/sec
      • V60: 61.035156 MB/sec (32-bit, 16 MHz) [15]
      • Z80: 11.444092 MB/sec (3× 8-bit, 4 MHz) [16][17][12]
    • VRAM: 476.837158 MB/sec
      • DSP: 305.175781 MB/sec (5× 32-bit, 16 MHz) [15]
      • Video Board: 171.661376 MB/sec (5× 36 MHz) [15][18]
    • Audio RAM: 19.073486 MB/sec (16-bit, 10 MHz) [16]
  • Internal DSP cache bandwidth: 305.175781 MB/sec (61.04 MB/sec, 32-bit, 16 MHz, per DSP)
  • Game ROM bandwidth: 61.04 MB/sec (32-bit, 16 MHz) [19]

List of Sega Model 1 Games

Gallery

  • Unit

  • Amplifier PCB

  • Communication PCB

  • CPU

  • Input/Output PCB

  • Sound PCB

  • Video PCB


Sega arcade boards
Originating in arcades








  1. ↑ 1.0 1.1 http://www.thg.ru/smoke/19991022/print.html
  2. ↑ http://www.1up.com/features/disappearance-suzuki-part-1
  3. ↑ File:MeanMachinesSega19UK.pdf, page 51
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 https://github.com/mamedev/mame/blob/master/src/mame/drivers/model1.cpp
  5. ↑ File:Overview of 32-bit V-Series Microprocessor.pdf
  6. ↑ File:UPD70616ProgrammersReferenceManual.pdf
  7. ↑ 7.0 7.1 7.2 https://github.com/mamedev/mame/blob/master/src/mame/video/model1.cpp
  8. ↑ http://members.iinet.net.au/~lantra9jp1/gurudumps/m2status/index.html
  9. ↑ 9.0 9.1 File:MB86232 datasheet.pdf
  10. ↑ http://wiki.mamedev.org/index.php/TGP:Index
  11. ↑ File:MB8421 datasheet.pdf
  12. ↑ 12.0 12.1 File:MB8431 datasheet.pdf
  13. ↑ http://mamedb.com/game/vformula
  14. ↑ http://mamedb.com/game/vf
  15. ↑ 15.0 15.1 15.2 File:M5M5178AP datasheet.pdf
  16. ↑ 16.0 16.1 File:MB8464A datasheet.pdf
  17. ↑ File:MB8432 datasheet.pdf
  18. ↑ File:HM65256B datasheet.pdf
  19. ↑ File:MB8316200B datasheet.pdf


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