System ROM: Difference between revisions
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*$10FD80: ? | *$10FD80: ? | ||
*$10FD83: Nationality (JP:0, EN:1, EU:2, goes up to 6 ?) | *$10FD83: Nationality (JP:0, EN:1, EU:2, goes up to 6 ?) | ||
The NeoGeo CD (not CDZ) BIOS contains credits, organized to be displayed on the fix layer (how can this be seen on screen ?): | |||
<pre> | |||
CREDITS | |||
SOFTWARE NORIYUKI HIGASHI | |||
HARDWARE MOTOO YOKOYAMA TOSHIYA YAHARA | |||
GRAPHICS OTIAI | |||
SPECIAL JON GUSO | |||
THANKS CURRY SHIMIZU | |||
SNK ALL STAFF | |||
</pre> | |||
[[Noriyuki Higashi]] = Mr.Noric | |||
[[File:cd2_bios.jpg|right|thumb|SP1 BIOS ROM on a CDM3-2 board.]] | [[File:cd2_bios.jpg|right|thumb|SP1 BIOS ROM on a CDM3-2 board.]] | ||
Revision as of 23:50, 13 February 2011
BIOSes are ROMs containing the initial program executed by NeoGeo systems. They are present in all hardware types.
AES BIOS
128kB. NEO-EP0.
MVS BIOS
128kB. SP-S2. Different names according to nationality.
CD/CDZ BIOS
RAM locations
- $10FD80: ?
- $10FD83: Nationality (JP:0, EN:1, EU:2, goes up to 6 ?)
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
1MiB chip that contains Z80 and 68k programs, PCM sound, and graphics which are copied to the corresponding DRAMs at boot time.
Graphic visualisation of a CDZ BIOS dump, with separated data blocks (larger size available):
File:Cdzbiosgfx.png
