Sega NAOMI 2

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NAOMI2.jpg
Sega NAOMI 2
Manufacturer: Sega
Variants: Sega NAOMI 2 GD-ROM, Sega NAOMI 2 Satellite Terminal
Add-ons: GD-ROM
Release Date RRP Code

The Sega NAOMI 2 is an arcade board developed by Sega and is a successor to Sega NAOMI hardware. It was originally released in 2000. Since it uses similar NAOMI architecture (but significantly beefed up), it is also fully backwards compatible with its predecessor.

The NAOMI 2 is significantly more powerful than the NAOMI, including a dual CPU setup, new T&L GPU, dual rasterizer GPU, increased memory, and faster clock rates and bandwidth. This leads to games with much more polygons than a NAOMI game, rendered at much faster speeds, while the new T&L GPU adds advanced lighting and particle effects. It was also more affordable than the very expensive Sega Hikaru arcade system that preceded it.

As with the NAOMI, the NAOMI 2 was also available in GD-ROM and Satellite Terminal variants.

Development

VideoLogic's Elan, the T&L geometry GPU coprocessor used in the NAOMI 2, had been in development since 1998, when the original NAOMI arcade system and Dreamcast console launched. [1]

Technical Specifications

NAOMI 2 Specifications

Graphics

  • Geometry T&L coprocessor GPU: VideoLogic Elan @ 200 MHz
  • Rasterizer GPU: 2× NEC-VideoLogic PowerVR 2 (PVR2DC/CLX2/Holly) @ 200 MHz [2]
  • FPGA: Altera FLEX EPF8452AQC160-3 FPGA @ 125 MHz [10][11]
    • Core units: 42 units
    • Bus width: 336‑bit internal, 120‑bit external
  • Color depth: 32‑bit ARGB,[5] 16,777,216 colors (24‑bit color) with 8‑bit (256 levels) alpha blending,[3] YUV and RGB color spaces, color key overlay [12]
  • Display resolution: 31 kHz horizontal sync, 60 Hz refresh rate, VGA,[13] progressive scan
    • Single monitor: 496×384 to 800×608 pixels [14]
    • Dual monitor: 992×768 to 1600×608 pixels
  • Geometric performance:
    • 100 million polygons/sec, raw performance [2]
    • 28 million textured polygons/sec, with lighting, shadows and trilinear filtering
    • 20 million textured polygons/sec, with lighting, shadows, trilinear filtering and anti-aliasing
    • 10 million textured polygons/sec, with 6 light sources per polygon,[3] shadows, trilinear filtering and anti-aliasing
  • Rendering fillrate:
    • 6 billion pixels/sec, for opaque polygons
    • 2 billion pixels/sec, for semi‑transparent polygons [8]
    • 2–6 billion pixels/sec, depending on opacity/translucency of polygons
  • Texturing performance:
    • Texture fillrate: 2 billion texels/sec
    • Textures per pass: 10 [2]

Memory

  • RAM/ROM memory: 304–584 MB (136 MB RAM, 168–448 MB ROM)
    • Video memory: 240–352 MB (96 MB RAM, 144–256 MB ROM)
  • System RAM: 136 MB SDRAM [10]
    • Main RAM: 32 MB
    • VRAM: 96 MB
      • Elan: 32 MB (geometry/model data)
      • PowerVR2: 64 MB (2× 32 MB)
    • Sound RAM: 8 MB
  • System ROM: 2048.25 KB (2 MB BIOS EPROM, 256 bytes EEPROM) [10]
  • Cartridge ROM: 168–448 MB
    • 2000 format: 168–280 MB (24 MB EPROM,[15] 144–256 MB FlashROM/MROM)
    • 2005 format: Up to 448 MB (128–448 MB FlashROM, 0–40 MB EPROM, 128 KB Flash PROM)[16]
  • Cache: 264 KB
    • L2 cache: 256 KB [2]
    • FPGA Configuration SRAM: 8 KB [10][17]

Bandwidth

  • Internal processor bandwidth: 13 GB/sec
    • SH4 cache: 6.4 GB/sec (2× 64‑bit, 400 MHz)
    • GPU: 21.25 GB/sec (976‑bit)
      • Elan: 12.8 GB/sec (512‑bit, 200 MHz)
      • PowerVR2: 3.2 GB/sec (2× 64‑bit, 200 MHz)
      • FPGA: 5.25 GB/sec (336‑bit, 125 MHz)
    • AICA: 256 MB/sec (32‑bit, 67 MHz)
  • RAM/ROM memory bandwidth: 16.1 GB/sec (15.1 GB/sec system, 1 GB/sec cartridge)
    • Video memory: 14 GB/sec (13 GB/sec VRAM, 900 MB/sec ROM)
  • System RAM bandwidth: 15 GB/sec [10]
    • Main RAM: 1.6 GB/sec (2× 64‑bit, 100 MHz) [18]
    • VRAM: 13 GB/sec (640‑bit)
      • Elan: 11 GB/sec (4× 128‑bit, 166 MHz) [6]
      • PowerVR2: 2 GB/sec (2× 64‑bit, 125 MHz) [19]
    • Sound RAM: 132 MB/sec (16‑bit, 66 MHz)
    • SRAM: 44 MB/sec (16‑bit, 22 MHz, HM62256)
  • System ROM bandwidth: 88 MB/sec [10]
    • BIOS EPROM: 80 MB/sec (16‑bit, 40 MHz) [20][21]
    • EEPROM: 8 MB/sec (2× 16‑bit, 2 MHz) [22]
  • Cartridge ROM bandwidth: 900 MB/sec (50 MHz) [23]
    • Note: High-speed access allows ROM to effectively be used as RAM, and textures streamed directly from ROM. [24]
  • Cartridge RAM bandwidth: 100 MB/sec (16-bit, 50 MHz)

NAOMI 2 GD-ROM Specifications

The NAOMI GD-ROM, released in 2001, is identical to the standard NAOMI, but uses GD-ROM discs for storage instead of ROM cartridges. It comes with a DIMM Board, which is very similar to a ROM cartridge, but with RAM instead of ROM. When a game is installed, the GD ROM content is loaded onto the DIMM Board RAM, so that the game data runs from the DIMM Board rather than the GD-ROM disc. The NAOMI 2 GD-ROM specification includes the following differences:

  • Board composition: Motherboard + Daughter Board + DIMM Board
  • Storage media: GD-ROM drive
    • GD-ROM transfer rate: 1.8 MB/sec (1800 KB/sec)

Memory

  • RAM: 392–648 MB (SDRAM)
    • Main RAM: 32 MB
    • VRAM: 96 MB
    • Sound RAM: 8 MB
    • DIMM RAM: 256–512 MB [25]
  • L2 cache: 256 KB
  • ROM: 26 MB
    • System ROM: 2048.25 KB (24 MB BIOS EPROM, 256 bytes EEPROM)
    • DIMM ROM: 24 MB (EPROM)

Bandwidth

  • RAM bandwidth: 16–17 GB/sec
    • Main RAM: 1.6 GB/sec
    • VRAM: 13 GB/sec
    • Sound RAM: 132 MB/sec
    • SRAM: 44 MB/sec
    • DIMM RAM: 1.1–2.13 GB/sec (1/2× 64-bit, 133 MHz) [25][26]

List of Games

NAOMI 2 Games

NAOMI 2 GD-ROM Games

NAOMI 2 Satellite Terminal Games


Sega arcade boards
Originating in arcades








  1. ↑ htt (Wayback Machine: 1998-12-06 11:10)
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 http://www.ign.com/boards/threads/noami-2-future.6157195/
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 http://www.segatech.com/arcade/naomi2/index.html
  4. ↑ http://computer.org/micro/articles/dreamcast_2.htm (Wayback Machine: 2000-08-23 20:47)
  5. ↑ 5.0 5.1 5.2 http://segatech.com/technical/overview/index.html
  6. ↑ 6.0 6.1 http://pdf.datasheetcatalog.com/datasheet/nec/UPD4564323G5-A80-9JH.pdf
  7. ↑ htt (Wayback Machine: 2014-07-03 01:18)
  8. ↑ 8.0 8.1 http://ign.com/articles/2000/09/21/jamma-2000-naomi-2-revealed
  9. ↑ File:NAOMI 1998 Press Release JP.pdf
  10. ↑ 10.0 10.1 10.2 10.3 10.4 10.5 https://github.com/mamedev/mame/blob/master/src/mame/drivers/naomi.cpp
  11. ↑ https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/ds/dsf8k.pdf
  12. ↑ http://www3.sharkyextreme.com/hardware/reviews/video/neon250/2.shtml (Wayback Machine: 2007-08-11 10:20)
  13. ↑ http://wiki.arcadeotaku.com/w/Sega_Naomi_Universal
  14. ↑ http://cadcdev.sourceforge.net/docs/kos-current/video_8h_source.html
  15. ↑ http://mamedb.com/game/clubkrte
  16. ↑ File:XCF01S datasheet.pdf
  17. ↑ https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/hb/cfg/cfg_cf52004.pdf
  18. ↑ File:HM5264 datasheet.pdf
  19. ↑ File:HY57V161610D datasheet.pdf
  20. ↑ http://pdf.datasheetcatalog.com/datasheets2/19/194530_1.pdf
  21. ↑ File:http://static1.squarespace.com/static/51f517f0e4b01da70d01ca2a/t/5454670fe4b07d8d6df49459/1414817551272/27C160.pdf
  22. ↑ File:AT93C46 datasheet.pdf
  23. ↑ File:S29GL-N datasheet.pdf
  24. ↑ http://farm6.staticflickr.com/5471/12172411045_18bfc5912f_c.jpg
  25. ↑ 25.0 25.1 http://wiki.arcadeotaku.com/w/Sega_Naomi_DIMM_board_and_GD-ROM
  26. ↑ File:M366S3323CT0 datasheet.pdf


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