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| {{rom|MCD|sha1=|md5=|crc32=9f6f6276|size=|date=1993-06-01|source=[[Sega CD 2]] (Funai Model) (NA) (2.00 Rev A)|comments=MK4102 MPR-15511A-T|quality=|file=Us scd2 930601.zip}} | | {{rom|MCD|sha1=|md5=|crc32=9f6f6276|size=|date=1993-06-01|source=[[Sega CD 2]] (Funai Model) (NA) (2.00 Rev A)|comments=MK4102 MPR-15511A-T|quality=|file=Us scd2 930601.zip}} |
| {{rom|MCD|sha1=|md5=|crc32=0507b590|size=|date=1993-03-30|source=[[Sega Mega-CD II]] (Funai Model) (EU) (2.00)|comments=MK4102-50 MPR-15512-T|quality=|file=Eu mcd2 930330.zip}} | | {{rom|MCD|sha1=|md5=|crc32=0507b590|size=|date=1993-03-30|source=[[Sega Mega-CD II]] (Funai Model) (EU) (2.00)|comments=MK4102-50 MPR-15512-T|quality=|file=Eu mcd2 930330.zip}} |
− | {{rom|MCD|sha1=|md5=|crc32=4d5cb8da|size=|date=1993-06-01|source=[[Sega Mega-CD II]] (Funai Model) (EU) (2.00 Rev A)|comments=MK4102-50 MPR-15512-T|quality=|file=Eu mcd2 930601.zip}} | + | {{rom|MCD|sha1=|md5=|crc32=4d5cb8da|size=|date=1993-06-01|source=[[Sega Mega-CD II]] (Funai Model) (EU) (2.00 Rev A)|comments=MK4102-50 MPR-15512A-T|quality=|file=Eu mcd2 930601.zip}} |
| {{rom|MCD|sha1=|md5=|crc32=2e49d72c|size=|date=1993-06-21|source=[[Sega CD 2]] (Sony Model) (NA) (2.11)|comments=MK-4102A MPR-15764-T|quality=|file=Us scd2 930621.zip}} | | {{rom|MCD|sha1=|md5=|crc32=2e49d72c|size=|date=1993-06-21|source=[[Sega CD 2]] (Sony Model) (NA) (2.11)|comments=MK-4102A MPR-15764-T|quality=|file=Us scd2 930621.zip}} |
| {{rom|MCD|sha1=|md5=|crc32=d48c44b5|size=|date=1993-09-07|source=[[Sega CDX]] (NA) (2.21x)|comments=MK-4121 MPR-16139-T|quality=|file=Us cdx 930907.zip}} | | {{rom|MCD|sha1=|md5=|crc32=d48c44b5|size=|date=1993-09-07|source=[[Sega CDX]] (NA) (2.21x)|comments=MK-4121 MPR-16139-T|quality=|file=Us cdx 930907.zip}} |
Revision as of 09:18, 8 January 2020
- Back to: Sega Mega-CD.
The original Japanese Mega-CD boot ROM, version 1.00.
All variants of the Sega Mega-CD come pre-installed with a boot ROM - a menu interface which appears when the console is given power. While a Sega Mega Drive cartridge can boot almost instantaneously, CD-ROMs require verification and loading, which depending on the quality of the disc or drive, can take several seconds. In addition to help drive the CD-ROM, the Mega-CD's boot ROM informs the user that console is in Mega-CD mode, and cruically gives them something more interesting to look at than a blank screen.
Over time, many slightly different boot ROMs were developed by Sega (or its partners), either for localisation purposes, bug fixes or due to changes in hardware. The Wondermega for example has a different style of boot ROM to a standard Mega-CD, while the LaserActive has to accommodate the Mega LD format.
Functions
Most Mega-CD boot ROMs offer the same functionality - principly to run Mega-CD games. Most models can also play music CDs and Japanese models accept CD+G discs. As the Mega-CD also contains on-board memory for save games, the boot ROM allows users to manage data, either by removing save data they no longer need, or by transferring it to a CD BackUp RAM Cart. Later boot ROMs and the LaserActive cull some of these features, possibly as a cost-saving measure or limitations with the hardware.
On the Mega-CD, boot ROMs typically play a music track, while colourful Mega-CD and/or Sega logos dance around, demonstrating the system's rotation and scaling abilities. Boot ROM versions 2.00 and later support use of the Sega Mouse in control port 2, should users what to use that device to navigate the menus.
All of these features (and more) were also made available in the Sega Saturn and Sega Dreamcast, as well as most rival disc-based consoles.
Screenshots
Main screen
CD-ROM playback
Storage information
ROM dump status
System |
Hash |
Size |
Build Date |
Source |
Comments |
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?
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1993-03-29
|
LaserActive (NA) (1.02)
|
BIOS header lists version as 0.98
|
|
("Us lsr 930329.zip" does not exist) (info)
|
|
?
|
|
|
1993-03-29
|
LaserActive (Japan) (1.02)
|
BIOS header lists version as 0.98
|
|
("Jp lsr 930329.zip" does not exist) (info)
|
|
?
|
|
|
1993-09-22
|
LaserActive (NA) (1.04)
|
|
|
("Us mld 930922.zip" does not exist) (info)
|
|
?
|
|
|
1993-08-10
|
LaserActive (Japan) (1.05)
|
|
|
("Jp lsr 930810.zip" does not exist) (info)
|
|
?
|
|
|
|
Sega Mega-CD (Japan) (1.00 Rev B)
|
HAA-2910 EPR-14088B
|
|
("BIOS Mega CD Japan 1.00g.7z" does not exist) (info)
|
|
?
|
|
|
|
Sega Mega-CD (Japan) (1.00 Rev C)
|
HAA-2910 EPR-14088C
|
|
("BIOS Mega CD Japan 1.00l.md.zip" does not exist) (info)
|
|
?
|
|
|
|
Sega Mega-CD (Japan) (1.00 Rev D)
|
HAA-2910 EPR-14088D
|
|
("BIOS Mega CD Japan v1.00o.7z" does not exist) (info)
|
|
?
|
|
|
1991-12-17
|
Sega Mega-CD (Japan) (1.00 Rev E)
|
HAA-2910 EPR-14088E
|
|
("Jp mcd1 911217.zip" does not exist) (info)
|
|
?
|
|
|
|
Sega Mega-CD (Japan) (1.00 Rev H)
|
HAA-2910 EPR-14088H, MPR-14088H-T
|
|
("BIOS Mega CD Japan 1.00S.md.zip" does not exist) (info)
|
|
?
|
|
|
1992-05-01
|
Sega Mega-CD (Japan) (1.11)
|
Dumped from Japanese model 2 sample/prototype
|
|
("Jp mcd2 920501.zip" does not exist) (info)
|
|
?
|
|
|
1991-12-28
|
Sega Mega-CD (Asia) (1.00 Rev H)
|
|
|
("Jp mcd1 911228.zip" does not exist) (info)
|
|
?
|
|
|
|
Sega CD (NA) (1.00)
|
|
|
("BIOS Sega CD USA 1.00.md.zip" does not exist) (info)
|
|
?
|
|
|
1992-10-11
|
Sega CD (NA) (1.10 Rev B)
|
MK-1690 MPR-15045B-T
|
|
("Us scd1 921011.zip" does not exist) (info)
|
|
?
|
|
|
1992-10-27
|
Sega Mega-CD (EU) (1.00)
|
MK-1690-18
|
|
("Eu mcd1 921027.zip" does not exist) (info)
|
|
?
|
|
|
1992-12-22
|
Sega Mega-CD 2 (Funai Model) (Japan) (2.00)
|
HAA-2912 MPR-15398-T
|
|
("Jp mcd2 921222.zip" does not exist) (info)
|
|
?
|
|
|
1993-03-14
|
Sega CD 2 (Funai Model) (NA) (2.00)
|
MK4102 MPR-15511-T
|
|
("Us scd2 930314.zip" does not exist) (info)
|
|
?
|
|
|
1993-06-01
|
Sega CD 2 (Funai Model) (NA) (2.00 Rev A)
|
MK4102 MPR-15511A-T
|
|
("Us scd2 930601.zip" does not exist) (info)
|
|
?
|
|
|
1993-03-30
|
Sega Mega-CD II (Funai Model) (EU) (2.00)
|
MK4102-50 MPR-15512-T
|
|
("Eu mcd2 930330.zip" does not exist) (info)
|
|
?
|
|
|
1993-06-01
|
Sega Mega-CD II (Funai Model) (EU) (2.00 Rev A)
|
MK4102-50 MPR-15512A-T
|
|
("Eu mcd2 930601.zip" does not exist) (info)
|
|
?
|
|
|
1993-06-21
|
Sega CD 2 (Sony Model) (NA) (2.11)
|
MK-4102A MPR-15764-T
|
|
("Us scd2 930621.zip" does not exist) (info)
|
|
?
|
|
|
1993-09-07
|
Sega CDX (NA) (2.21x)
|
MK-4121 MPR-16139-T
|
|
("Us cdx 930907.zip" does not exist) (info)
|
|
?
|
|
|
1993-09-16
|
Sega Multi-Mega (EU) (2.21x)
|
MK-4121-50 OPR-16140
|
|
("Eu mmg 930916.zip" does not exist) (info)
|
|
?
|
|
|
1992-02-06
|
Sega Wondermega (Japan) (1.00)
|
HWM-5010 G301
|
|
("Jp wmg 920206.zip" does not exist) (info)
|
|
?
|
|
|
|
Victor Wondermega M2 (Japan) (2.00)
|
RG-M2 G303[n 1]
|
|
("Wondermega 2.00 Bios.zip" does not exist) (info)
|
|
?
|
|
|
1993-12-27
|
JVC X-Eye (NA) (2.00)
|
RG-M10BU G304
|
|
("Us xeye 931227.zip" does not exist) (info)
|
|
?
|
|
|
|
Aiwa CSD-GM1 (JP) (2.11)
|
MPR-15768-T
|
|
("Aiwa_CSD_GM1_Bios.zip" does not exist) (info)
|
|
Notes
- ↑ [The ZIP file contains two dumps, a "good" dump and a "bad" dump. The "bad" dump has an incorrect HINT vector, but is otherwise identical to the "good" dump. The CRC32 listed here is for the "good" dump. The ZIP file contains two dumps, a "good" dump and a "bad" dump. The "bad" dump has an incorrect HINT vector, but is otherwise identical to the "good" dump. The CRC32 listed here is for the "good" dump.]
References