MR BIOS

MR BIOS (short for Microid Research BIOS), unofficially and commonly nicknamed Mr. BIOS, is a personal computer BIOS developed by Microid Research Inc. (MRI) from 1989 to 1999. It was mostly offered as a third-party BIOS upgrade for existing motherboards of various brands. However, it was occasionally also used as the default BIOS on some motherboards.

Microid Research Inc. (MRI)

Microid Research Inc., abbreviated MRI, was a software development company founded in 1989 and incorporated in 1992 in Santa Clara, California. It was acquired by Unicore Software in the mid-1990s (most likely in 1995 or 1996) and relocated to North Andover, Massachusetts (where Unicore was located). Unicore was then acquired by Award Software in 1997, which then merged with Phoenix Technologies the following year.

Versions

The below is a list of known and possible versions of MR BIOS. Known versions with available ROMs are marked as "Available", while ones without are marked "Confirmed". Assumed possible versions are marked "Assumed".

Version	Earliest release date	Status	First seen on	Notes
V1.0A	November 18, 1990	Available	Two OPTi 82C283 chipset motherboards (QDI P386SX/25 PW and Shuttle HOT-306).	Both motherboards support the same ROM upgrade (V007B314)
V1.0B	Late-1990(?)	Assumed		May possibly exist assuming by the naming scheme, currently no ROMs are known.
V1.0C	Late-1990	Confirmed	Unknown OPTi 82C481 chipset motherboard, labelled "KMC486-25"	Only known instance of V1.0C so far. Currently no ROM dumps are available.
V1.0D	Late-1990 or early-1991(?)	Assumed		May possibly exist assuming by the naming scheme
V1.0E	April 2, 1991	Available	Cache Computers CACHE BAT 486 (Model 319) motherboard	Last known version using the V1.0x naming scheme. The ROM has no visible Microid Research or MR BIOS branding, so it was most likely licensed to the Cache Computers for use.
V1.26	October 27, 1991	Available	TAM33-P1/TAM40-P1 motherboard	Earliest known version under the new naming scheme.
V1.27	Late-1991 or early-1992(?)	Assumed		Likely exist assuming by the naming scheme
V1.28
V1.29	January 28, 1992	Available	ORCHID TECHNOLOGY SUPERBOARD 486	Earliest known version with the blue background setup utility.
V1.30	Early or mid-1992	Assumed		Likely exist assuming by the naming scheme
V1.31
V1.32
V1.33
V1.34
V1.35
V1.36	July 15, 1992	Available	Octek PANTHER II
V1.37	Mid-1992	Assumed		Likely exist assuming by the naming scheme
V1.38
V1.39
V1.40	September 9, 1992	Available	ECS 8517 V3.3
V1.41	October 14, 1992	Available	Octek Jaguar IV-C (Rev 1.6)
V1.42	Late-1992 or early-1993	Assumed		Likely exist assuming by the naming scheme
V1.43
V1.44
V1.45	March 16, 1993	Available	Octek HIPPO VL+
V1.46	Mid-1993	Assumed		May possibly exist assuming by the naming scheme
V1.47
V1.48
V1.49
V1.50
V1.51	August 6, 1993	Available	Octek JAGUAR V 386 (rev 2.0)
V1.52	August 20, 1993	Available	A-Trend 4GPV3, 4GPV3.1 and MECER CORPORATION B860 (REV. A)	All three motherboards support the same ROM upgrade (V080B425)
V1.53	November 20, 1993	Available	Octek HIPPO OP
V1.54	Late-1993 or early-1994	Assumed		May possibly exist assuming by the naming scheme
V1.55
V1.56
V1.57
V1.58
V1.59
V1.60	January 26, 1994	Available	BEK-tronic BEK-3739 and Edom/WinTech MA013-X	Both motherboards support the same ROM upgrade (V084B4BH)