System ROM: Difference between revisions
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BIOSes are ROMs containing the initial program executed by NeoGeo systems. They are present in all hardware types. | BIOSes (officially called "SYSTEM ROM") are ROMs containing various generic functions and the initial program executed by NeoGeo systems. They are present in all hardware types. | ||
== AES BIOS == | == AES BIOS == | ||
[[File:aes_biosep0.jpg|right|thumb|Toshiba EP0 BIOS ROM found on an AES board]] | [[File:aes_biosep0.jpg|right|thumb|Toshiba EP0 BIOS ROM found on an AES board]] | ||
Size: 128KiB. Called "NEO-EP0". | |||
== MVS BIOS == | == MVS BIOS == | ||
[[File:mvs_sp-s2.jpg|right|thumb|Toshiba SP-S2 BIOS ROM on a 1FZS MVS slot.]] | [[File:mvs_sp-s2.jpg|right|thumb|Toshiba SP-S2 BIOS ROM on a 1FZS MVS slot.]] | ||
Size: 128KiB. Called "SP-S2". Different names according to nationality. | |||
Holds functions for coins, [[UPD4990|calendar]] and player starts. | |||
== CD/CDZ BIOS == | == CD/CDZ BIOS == | ||
[[File:cd2_bios.jpg|right|thumb|SP1 BIOS ROM on a CDM3-2 board.]] | |||
[[File:brd_spj.jpg|thumb|SPJ Japanese BIOS on a [[ROM-Only boards|ROM-only arcade board]]. Picture courtesy of [[http://www.mvs-scans.com MVS-Scans]].]] | |||
Size: 512KiB. | |||
Chip that contains [[Z80]] and [[68k]] programs, PCM sound, and graphics which are copied to the corresponding [[DRAM|DRAMs]] at boot time. The BIOS on CD systems also contains graphics and sounds. There is ''no'' [[SFIX]] or [[SM1]] ROMs on cart systems. | |||
The [[CD hardware versions|CD1 and CD2]] BIOSes (FRONT-SP1 and TOP-SP1) include the [[Sound drivers list|"Ver 3.0 by Mr.Noric.1993/11/10 14:00"]] Z80 [[sound driver]]. | |||
The [[CDZ]] BIOS includes the "Ver 3.0 by MAKOTO.04/03/10 to SK" driver. | |||
The NeoGeo CD (not CDZ) BIOS contains credits, organized to be displayed on the fix layer (how can this be seen on screen ?): | The NeoGeo CD (not CDZ) BIOS contains credits, organized to be displayed on the fix layer (how can this be seen on screen ?): | ||
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[[Noriyuki Higashi]] = Mr.Noric | [[Noriyuki Higashi]] = Mr.Noric | ||
Graphic visualisation of a CDZ BIOS dump, with separated data blocks:<br> | |||
[[File:cdzbiosgfx.png]] | |||
Graphic visualisation of a CDZ BIOS dump, with separated data blocks | |||
[[File:cdzbiosgfx.png | |||
[[Category:Base system]] | [[Category:Base system]] | ||
Revision as of 06:01, 4 July 2011
BIOSes (officially called "SYSTEM ROM") are ROMs containing various generic functions and the initial program executed by NeoGeo systems. They are present in all hardware types.
AES BIOS
Size: 128KiB. Called "NEO-EP0".
MVS BIOS
Size: 128KiB. Called "SP-S2". Different names according to nationality.
Holds functions for coins, calendar and player starts.
CD/CDZ BIOS
Size: 512KiB.
Chip that contains Z80 and 68k programs, PCM sound, and graphics which are copied to the corresponding DRAMs at boot time. The BIOS on CD systems also contains graphics and sounds. There is no SFIX or SM1 ROMs on cart systems.
The CD1 and CD2 BIOSes (FRONT-SP1 and TOP-SP1) include the "Ver 3.0 by Mr.Noric.1993/11/10 14:00" Z80 sound driver.
The CDZ BIOS includes the "Ver 3.0 by MAKOTO.04/03/10 to SK" driver.
The NeoGeo CD (not CDZ) BIOS contains credits, organized to be displayed on the fix layer (how can this be seen on screen ?):
CREDITS SOFTWARE NORIYUKI HIGASHI HARDWARE MOTOO YOKOYAMA TOSHIYA YAHARA GRAPHICS OTIAI SPECIAL JON GUSO THANKS CURRY SHIMIZU SNK ALL STAFF
Noriyuki Higashi = Mr.Noric
Graphic visualisation of a CDZ BIOS dump, with separated data blocks:
File:Cdzbiosgfx.png
