Repair & Schematics
Sega Mega CD

BIOS File Headers (Sega Mega CD)

1min

A useful resource when dealing with BIOS files is to know how their headers look so when you open a binary dump you can identify the BIOS version.

BIOS Version

Header

Compile date

Mega-CD 1.00g (JP)

SEGA MEGA DRIVE (C)SEGA 1991.NOVMEGA-CD BOOT ROM 11/20-1991 17:00 1.00gMEGA-CD BOOT ROM

November 20th 1991 5:00 AM

Mega-CD 1.00L (JP)

SEGA MEGA DRIVE (C)SEGA 1991.NOVMEGA-CD BOOT ROM 12/02-1991 15:20 1.00lMEGA-CD BOOT ROM

December 2nd 1991 at 3:30 pm

Mega-CD 1.00o (JP)

SEGA MEGA DRIVE (C)SEGA 1991.NOVMEGA-CD BOOT ROM 12/06-1991 10:10 1.00oMEGA-CD BOOT ROM

December 6th 1991 10:10 AM

Mega-CD 1.00P (JP)

SEGA MEGA DRIVE (C)SEGA 1991.NOVMEGA-CD BOOT ROM 12/17-1991 12:00 1.00pMEGA-CD BOOT ROM

December 17th 1991 12:00 PM

Mega-CD 1.00S (JP)

SEGA MEGA DRIVE (C)SEGA 1991.DECMEGA-CD BOOT ROM 12/28-1991 OS220:30 1.00SMEGA-CD BOOT ROM

December 28th 1991 8:30 PM

Sega Wonder-Mega 1.00W (JP)

SEGA MEGA DRIVE (C)SEGA 1992.FEBWONDER-MEGA BOOTROM 02/06-1992 01:30 1.00WWONDER-MEGA BOOT

February 6th 1992 1:30 AM

Mega-CD 1.11 (JP)

SEGA MEGA DRIVE (C)SEGA 1992.MAYMEGA-CD BOOT ROM 05/01-1992 02:30 1.11 MEGA-CD BOOT ROM

May 1st 1992 2:30 AM

Sega CD 1.00 (US)

SEGA MEGA DRIVE (C)SEGA 1992.JULSEGA-CD BOOT ROM08/04-1992 03:00 1.00 SEGA-CD BOOT ROM

August 4th 1992 3:00 AM

Sega CD 1.10 (US)

SEGA MEGA DRIVE (C)SEGA 1992.OCTSEGA-CD BOOT ROM10/11-1992 18:30 1.10 SEGA-CD BOOT ROM

November 11th 1992 6:30 PM

Mega-CD 1.00 (E)

SEGA MEGA DRIVE (C)SEGA 1992.OCTMEGA-CD BOOT ROM10/27-1992 15:15 1.00 MEGA-CD BOOT ROM

October 27th 1992 3:15 PM

Mega-CD 2.00C (JP)

SEGA MEGA DRIVE (C)SEGA 1992.DECCD2 BOOT ROM 12/22-1992 14:00 2.00cCD2 BOOT ROM

December 22nd 1992 2:00 PM

Sega CD 2.00 (US)

SEGA MEGA DRIVE (C)SEGA 1993.MARCD2 BOOT ROM 03/14-1993 01:00 2.00 CD2 BOOT ROM

March 14th 1993 1:00 AM

Mega-CD 2.00 (E)

SEGA MEGA DRIVE (C)SEGA 1993.MARCD2 BOOT ROM 03/30-1993 12:00 2.00 CD2 BOOT ROM

March 30th 1993 12:00 PM

LaserActive 0.98 (JP)

SEGA MEGA DRIVE (C)SEGA 1993.APRMEGA-LD BOOT ROM 03/29-1993 17:00 0.98 MEGA-LD BOOT ROM

April 29th 1993 5:00 PM

LaserActive 0.98 (US)

SEGA MEGA DRIVE (C)SEGA 1993.APRMEGA-LD BOOT ROM 03/29-1993 17:00 0.98 MEGA-LD BOOT ROM

April 29th 1993 5:00 PM

LaserActive 1.04 (US)

SEGA GENESIS (C)SEGA 1993.APRMEGA-LD BOOT ROM 09/22-1993 17:00 1.04 MEGA-LD BOOT ROM

September 22nd 1993 5:00 PM

Sega WonderMega 2.00 (JP)

SEGA MEGA DRIVE (C)SEGA 1993.MAYWONDERMEGA2 BOOTROM 05/27-1993 13:20 2.00 WONDERMEGA2 BOOT

May 27th 1993 1:20 PM

Mega-CD 2.00W (E) b1

SEGA MEGA DRIVE (C)SEGA 1993.JUNCD2 BOOT ROM 06/01-1993 20:00 2.00WCD2 BOOT ROM

June 1st 1993 8:00 PM

Sega CD 2.00W (US)

SEGA MEGA DRIVE (C)SEGA 1993.JUNCD2 BOOT ROM 06/01-1993 20:00 2.00WCD2 BOOT ROM

June 1st 1993 8:00 PM

Sega CD 2.11X (US)

SEGA MEGA DRIVE (C)SEGA 1993.JUNCD2 BOOT ROM 06/21-1993 16:00 2.11XCD2 BOOT ROM

June 21st 1993 4:00 PM

Sega CDX 2.21x (US)

SEGA MEGA DRIVE (C)SEGA 1993.SEPCDX BOOT ROM 09/07-1993 19:00 2.21XCDX BOOT ROM

September 7th 1993 7:00 PM

Multi-Mega 2.21x (EU)

SEGA MEGA DRIVE (C)SEGA 1993.SEPCDX BOOT ROM 09/16-1993 14:00 2.21XCDX BOOT ROM

September 16th 1993 2:00 PM

JVC X'Eye 2.00x (US)

SEGA MEGA DRIVE (C)SEGA 1993.DECWONDERMEGA2 BOOTROM 12/27-1993 16:30 2.00 X EYE BOOT for(MP)

December 27th 1993 4:30 PM

JVC X'Eye 2.00 (JP)

SEGA MEGA DRIVE (C)SEGA 1993.DECWONDERMEGA2 BOOTROM 12/27-1993 16:30 2.00 X EYE BOOT for(MP)

December 27th 1993 4:30 PM

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