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Naomi GD-ROM Bios - MAME machine

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naomigd
Naomi GD-ROM Bios
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GAME SYSTEM CHD BIOS DEVICE PARENT CLONE MECHANICAL SCREENLESS

Main data
Romset and name:
naomigd Naomi GD-ROM Bios
Short name:
Naomi GD-ROM Bios
Manufacturer:
Year:
Genre:
System
Category:
System / BIOS
Serie:
-
Driver source:
Language:
-
Similar games:
Input / Controls
Players:
Up to 2 players
Input:
Joystick 8 ways
Buttons / keys:
Coins:
Cabinet:
-
Free-play:
Not supported
Rankings
Avarage user rating:
AntoPISA BestGame:
-
MASH All-Time:
-
Video
Display:
640x480@61.702586 Hz, CRT 31kHz
Orientation:
Horizontal
Scrolling:
Unknown
Colors:
-
CPU:
ARM7 (little), Hitachi SH-4 (little), Motorola MC68000, Toshiba TMP90PH44, Zilog Z80
Audio
Sound:
2 channels
Audio chips:
Speaker, Yamaha AICA
Romset
First release:
Mame 0.126 released on jul-06 2008
Last release:
Mame 0.226 released on oct-28 2020
Clone of:
-
Bios:
Not required
Use rom of:
-
Use sample of:
-
Previous romset:
None
New romset:
None
Files
Dump:
GOOD
Required files:
Status
OVERALL:
PRELIMINARY
Emulation:
Preliminary
Graphic:
Imperfect
Color:
Good
Sound:
Imperfect
Cocktail:
-
Protection:
Good
Save state:
Unsupported
Additional infos
  • History
  • Info
  • Score
  • PCB
  • Commands
  • Init
  • Driver
  • XML
  • Arcade System published 20 years ago:

    NAOMI GD-ROM System © 2000 Sega Enterprises, Limited.

    TECHNICAL
    The GD-ROM upgrade is compatible with Naomi and Naomi 2 via the option port on the top of the board. It comes with a DIMM board, very similar to the ROM board on a normal NAOMI cartridge, but has RAM instead of ROMS.

    RAM board Uses normal PC type DIMM's, so upgrading memory is not a problem, and relativly cheap.

    The GD Rom system has a very clever way of getting around the loading delay time. When the game is initially installed, the GD ROM loads its content into the Naomi RAM. Once this is completed, the GD ROM goes into standby unless the RAM gets corupted or the game gets shut off for 72 hours or more. This does two things,

    1) Eliminates loading delays completely, (after initial power up.)
    2) Minimizes the on/off cycles of the GD ROM drive and greatly increasing the life of this mechanical device.

    From Sega R+D - "We learned a lesson watching our coin-op competitors go through hardware hell. Many have been using off-board storage devices for years - hard drives, CD's, etc. with great success in increased content but at a tremendous cost in realiablity. These storage devices simply could not withstand the constant on/off cycling a coin-op application demands. Add to that the dirt and smoke a game has to put up with on location vs. a normal computer application and you can see how this was a problem waiting to happen"

    The GD-Rom system uses an electronic "key" that plugs into the DIMM module to act as an activator, to prevent people just copying the GD-Roms, visible on the top right of the pictures. A different key is supplied with every game.

    There is a well founded rumor that Sega may use this system for having multigame cabinets like the neogeo multi systems, as the GR-Rom can store a LOT of data....

    CONTRIBUTE
    Edit this entry: https://www.arcade-history.com/?&page=detail&id=48276&o=2
    Informations provided by © Alexis Bousiges
    Informations provided by Contribute to the translation
  • Informations provided by
    Informations provided by / © Copyright of Fujix
  • Informations provided by
  • Informations provided by
  • Informations provided by Fabricio Coroquer, revisited from the work of
  • Informations provided by Contribute
  • Informations provided by
  • Informations provided by
Dip-switches:
Cheats:
Ports:
Devices refs:

If you notice any inaccuracy or error, please report

Data updated on october 28 2020


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Romset:
naomigd
Title:
Naomi GD-ROM Bios
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