Wow, those zip files have a lot of MR BIOS files in them, they appear to be real BIOS ROMs too.
Here's the full list of MR BIOS roms in your find. Excellent work 😀
Filename Port Chipset Description
V000B200 STD_286 Generic (non-Chipset) 286 / 386 /486 Generic 286
V000B202 STD_202 Generic (non-Chipset) 286 / 386 /486 Generic 286 x000B200 (T-)
V000B203 STD_203 Generic (non-Chipset) 286 / 386 /486 Generic 286 x000B200 (T+)
V000B300 STD_386 Generic (non-Chipset) 286 / 386 /486 Generic 386
V000B302 STD_302 Generic (non-Chipset) 286 / 386 /486 Generic 386 x000B300 (T-)
V000B303 STD_303 Generic (non-Chipset) 286 / 386 /486 Generic 386 x000B300 (T+)
V000B400 STD_486 Generic (non-Chipset) 286 / 386 /486 Generic 486
V000B408 STD_408 Generic (non-Chipset) 286 / 386 /486 Generic 486 x000B400 (C-)
V000B409 STD_409 Generic (non-Chipset) 286 / 386 /486 Generic 486 x000B400 (C+)
V001B300 MICR300 MICRONICS 386 (Discrete-Logic) Discrete Logic 386, Cx486
V001B310 MICR310 MICRONICS 386 (Discrete-Logic) ASIC MIC-362/363 386, Cx486
V001B330 MICR330 MICRONICS 386 (Discrete-Logic) ASIC MIC-461/462 386, Cx486, 486
V002B306 OPTI306 OPTi WriteThru 82C381 / 82C481 82C381 - 386 WriteThru
V002B308 OPTI308 OPTi WriteThru 82C381 / 82C481 82C381 - 386 WriteThru x002B306 (TL-)
V002B309 OPTI309 OPTi WriteThru 82C381 / 82C481 82C381 - 386 WriteThru x002B306 (TL+)
V002B406 OPTI406 OPTi WriteThru 82C381 / 82C481 82C481 - 486 WriteThru
V002B408 OPTI406 OPTi WriteThru 82C381 / 82C481 82C481 - 486 WriteThru x002B406 (CL-)
V002B409 OPTI406 OPTi WriteThru 82C381 / 82C481 82C481 - 486 WriteThru x002B406 (CL+)
V004B300 ZYMS300 ZYMOS POACH-SX / Intel-335 386SX
V004B301 ZYMS301 ZYMOS POACH-SX / Intel-335 386SX Turbo: 8042 Pin 23 (only) Active Low
V004B302 ZYMS302 ZYMOS POACH-SX / Intel-335 386SX (T-)
V004B303 ZYMS303 ZYMOS POACH-SX / Intel-335 386SX (T+)
V007B315 OPTI315 OPTi 386SX SxPW/SxPI 82C281 / 82C283 82C281 - 386 SxPW (Write-Poster and Cache DISABLED)
V007B316 OPTI316 OPTi 386SX SxPW/SxPI 82C281 / 82C283 82C281 - 386 SxPW (Cache enabled)
V007B317 OPTI317 OPTi 386SX SxPW/SxPI 82C281 / 82C283 82C283 - 386 SxPI single-chip 386SX non-cache
V007B318 OPTI318 OPTi 386SX SxPW/SxPI 82C281 / 82C283 82C283 - 386 SxPI single-chip 386SX non-cache x007B317 (T+) note: external turbo circuit only
V007B31K OPTI31K OPTi 386SX SxPW/SxPI 82C281 / 82C283 82C281 - 386 SxPW (Cache enabled) x007B316 (TL-)
V007B31L OPTI31L OPTi 386SX SxPW/SxPI 82C281 / 82C283 82C281 - 386 SxPW (Cache enabled) x007B316 (TL+)
V009B303 SIS_303 SIS "RABBIT" 386, 85C3X0 Revs A,B,C Turbo via PIO-0 (85C320 Pin 83)
V009B306 SIS_306 SIS "RABBIT" 386, 85C3X0 Revs A,B,C Turbo via PIO-0 (85C320 Pin 83) (TL-) PIO-0 and 8042 pins
V009B307 SIS_307 SIS "RABBIT" 386, 85C3X0 Revs A,B,C Turbo via PIO-0 (85C320 Pin 83) (TL+) PIO-0 and 8042 pins
V010B300 TACT300 Texas Instruments "TIGER" TACT83000 TACT83000 386SX/DX, non-cache
V010B302 TACT302 Texas Instruments "TIGER" TACT83000 TACT83000 386SX/DX, Intel 385 cache
V010B303 TACT303 Texas Instruments "TIGER" TACT83000 TACT83000 386SX/DX, Austek cache
V010B30A TACT30A Texas Instruments "TIGER" TACT83000 TACT83000 386SX/DX, non-cache x010B300 (TL-)
V010B30B TACT30B Texas Instruments "TIGER" TACT83000 TACT83000 386SX/DX, non-cache x010B300 (TL+)
V010B400 TACT400 Texas Instruments "TIGER" TACT83000 TACT83000 486DX, no external cache
V016B401 SYML401 Symphony Labs "HAYDN" SL82C46X 386sx/386DX/486/Cx
V016B402 SYML402 Symphony Labs "HAYDN" SL82C46X 386sx/386DX/486/Cx with C&T 82C711 multi-IO
V016B403 SYML403 Symphony Labs "HAYDN" SL82C46X 386sx/386DX/486/Cx with NSC PC87310 Super-IO
V016B404 SYML404 Symphony Labs "HAYDN" SL82C46X 386sx/386DX/486/Cx x016b401 (TL-)
V016B405 SYML405 Symphony Labs "HAYDN" SL82C46X 386sx/386DX/486/Cx x016b401 (TL+)
V018B301 ETEQ301 ETEQ Microsystems 386, 82C491/2 "COUGAR", Rev A **ONLY**
V018B303 ETEQ303 ETEQ Microsystems 386, 82C491/2 "COUGAR", Rev B,C **NOT Rev A**
V018B304 ETEQ304 ETEQ Microsystems 386, 82C491/2 "COUGAR", Rev B,C **NOT Rev A** x018B303 (TL-)
V018B305 ETEQ305 ETEQ Microsystems 386, 82C491/2 "COUGAR", Rev B,C **NOT Rev A** x018B303 (TL+)
V018B401 ETEQ401 ETEQ Microsystems 486, 82C491/2 "COUGAR", Rev A **ONLY**
V018B403 ETEQ403 ETEQ Microsystems 486, 82C491/2 "COUGAR", Rev B,C **NOT Rev A**
V018B404 ETEQ404 ETEQ Microsystems 486, 82C491/2 "COUGAR", Rev B,C **NOT Rev A** x018B403 (CL-)
V018B405 ETEQ405 ETEQ Microsystems 486, 82C491/2 "COUGAR", Rev B,C **NOT Rev A** x018B403 (CL+)
V019B301 VLSI301 VLSI TOPCAT / Intel-340 386 SX/DX, non-cache
V019B302 VLSI302 VLSI TOPCAT / Intel-340 386 SX/DX, non-cache, with 82C106 combo chip
V019B312 VLSI312 VLSI TOPCAT / Intel-340 386 SX/DX, 385 cache, with 82C106 combo chip
V019B401 VLSI401 VLSI TOPCAT / Intel-340 486
V019B402 VLSI402 VLSI TOPCAT / Intel-340 486, with 82C106 combo chip
V019B404 VLSI404 VLSI TOPCAT / Intel-340 486, with 82C106, on-board COM2 inhibited for SCO
V020B324 OPTI324 OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B
V020B32B OPTI32B OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B x020B324 with C&T 82C711 multi-IO
V020B32C OPTI32C OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B x020B324 with NSC PC87310 Super-IO
V020B32E OPTI32E OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B x020B324 (T-)
V020B32F OPTI32F OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B x020B324 (T+)
V020B32G OPTI32G OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B x020B324 (CL-)
V020B32H OPTI32H OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C391 - 386 WriteBack Revs A,B x020B324 (CL+)
V020B424 OPTI424 OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C491 - 486 WriteBack (original)
V020B428 OPTI428 OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B
V020B42B OPTI42B OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B x020B428 with C&T 82C711 multi-IO
V020B42C OPTI42C OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B x020B428 with NSC PC87310 Super-IO
V020B42E OPTI42E OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B x020B428 (T-)
V020B42F OPTI42F OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B x020B428 (T+)
V020B42G OPTI42G OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B x020B428 (CL-)
V020B42H OPTI42H OPTi WriteBack 82C391 / 82C491 / 82C493 / 82C495 82C493/5 - 486 WriteBack Revs A,B x020B428 (CL+)
V023B301 PKDM301 Chips & Technologies PEAK-DM REV-0 CS8233 "PEAK-DM" REV-0 (NOT REV-B1)
V023B304 PKDM304 Chips & Technologies PEAK-DM REV-0 CS8233 "PEAK-DM" REV-0 (NOT REV-B1) x023B301 (TL-)
V023B305 PKDM305 Chips & Technologies PEAK-DM REV-0 CS8233 "PEAK-DM" REV-0 (NOT REV-B1) x023B301 (TL+)
V028B301 SLGC301 Syslogic - Solutions - PerCom 386, non-cache
V028B302 SLGC302 Syslogic - Solutions - PerCom 386, with cache
V028B304 SLGC304 Syslogic - Solutions - PerCom 386, non-cache (TL-)
V028B305 SLGC305 Syslogic - Solutions - PerCom 386, non-cache (TL+)
V028B306 SLGC306 Syslogic - Solutions - PerCom 386, with cache (TL-)
V028B307 SLGC307 Syslogic - Solutions - PerCom 386, with cache (TL+)
V028B401 SLGC401 Syslogic - Solutions - PerCom 486, no external cache
V028B404 SLGC404 Syslogic - Solutions - PerCom 486, no external cache (TL-)
V028B405 SLGC405 Syslogic - Solutions - PerCom 486, no external cache (TL+)
V032B300 SCAT300 Chips & Technologies SCAT-SX 82C386 "SCAT-SX", with 82C711 combo-IO
V032B304 SCAT304 Chips & Technologies SCAT-SX 82C386 "SCAT-SX", with 82C711 combo-IO x032B300 (711)(TL-)
V032B305 SCAT305 Chips & Technologies SCAT-SX 82C386 "SCAT-SX", with 82C711 combo-IO x032B300 (711)(TL+)
V036B200 HDK_200 Ever Success "Hedaka" 286 286 EverTech
V036B210 HDK_210 Ever Success "Hedaka" 286 286 EverTech, with built-in EMS
V037B301 UMC_301 UMC WriteBack 82C48X 386 WriteBack, Rev 0 *ONLY*
V037B302 UMC_302 UMC WriteBack 82C48X 386 WriteBack, Rev A,B *ONLY* (Not REV-0 !)
V037B304 UMC_304 UMC WriteBack 82C48X 386 WriteBack, Rev A,B *ONLY* (Not REV-0 !) x037b302, for Cyrix layout with A20M and FLUSH
V037B401 UMC_401 UMC WriteBack 82C48X 486 WriteBack, Rev 0 *ONLY*
V037B402 UMC_402 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY*
V037B403 UMC_403 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY*, NO Turbo (for 486SX 2X-OSC)
V037B404 UMC_404 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* x037B402 (TL-)
V037B405 UMC_405 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* x037B402 (TL+)
V037B406 UMC_406 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* x037B403 (CL-) (NO turbo, for 486SX 2X-OSC)
V037B407 UMC_407 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* x037B403 (CL+) (NO turbo, for 486SX 2X-OSC)
V037B40A UMC_40A UMC WriteBack 82C48X 486 REV-B (2WS)
V037B40B UMC_40B UMC WriteBack 82C48X 486 REV-B (2WS) NO Turbo (for 486SX 2X-OSC)
V037B40C UMC_40C UMC WriteBack 82C48X 486 REV-B (2WS) x037B40A (2WS) (TL-)
V037B40G UMC_40G UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* x037B402, for L-Bus M/Boards that hang at PostCode 1D (PAL bug causes Ready-Hang on WEITEK access)
V039B200 HT12200 Headland Technologies HT12/12+, HT22/18C, HT320, HT340 286 HT12/HT12+
V039B201 HT12201 Headland Technologies HT12/12+, HT22/18C, HT320, HT340 286 HT12/HT12+ x039b200 (T-)
V039B202 HT12202 Headland Technologies HT12/12+, HT22/18C, HT320, HT340 286 HT12/HT12+ x039b200 (T+)
V039B210 HT12210 Headland Technologies HT12/12+, HT22/18C, HT320, HT340 286 HT12/HT12+, built-in EMS
V039B211 HT12211 Headland Technologies HT12/12+, HT22/18C, HT320, HT340 286 HT12/HT12+, built-in EMS x039b210 (T-)
V039B212 HT12212 Headland Technologies HT12/12+, HT22/18C, HT320, HT340 286 HT12/HT12+, built-in EMS x039b210 (T+)
V042B320 ELIT320 Elite Microelectronics "EAGLE" 386 Rev A1
V042B324 ELIT324 Elite Microelectronics "EAGLE" 386 Rev A1 x042B320 (TL-)
V042B325 ELIT325 Elite Microelectronics "EAGLE" 386 Rev A1 x042B320 (TL+)
V044B330 OPTI330 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed)
V044B331 OPTI331 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed) x044B330 with C&T 82C711 multi-IO
V044B332 OPTI332 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed) x044B330 with NSC PC87310 Super-IO
V044B334 OPTI334 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed) x044B330 (T-)
V044B335 OPTI335 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed) x044B330 (T+)
V044B336 OPTI336 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed) x044B330 (CL-)
V044B337 OPTI337 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 386 DXPI 82C496 ('497 and async design autosensed) x044B330 (CL+)
V044B430 OPTI430 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed)
V044B431 OPTI431 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed) x044B430 with C&T 82C711 multi-IO
V044B432 OPTI432 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed) x044B430 with NSC PC87310 Super-IO
V044B434 OPTI434 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed) x044B430 (T-)
V044B435 OPTI435 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed) x044B430 (T+)
V044B436 OPTI436 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed) x044B430 (CL-)
V044B437 OPTI437 OPTi Single-Chip 386/486 DxPI 82C496 (+82C497) 486 DXPI 82C496 ('497 and async design autosensed) x044B430 (CL+)
V045B400 CNTQ400 CONTAQ 82C591/2 386/486 WriteBack 386/486/Cx WriteBack
V045B406 CNTQ406 CONTAQ 82C591/2 386/486 WriteBack 386/486/Cx WriteBack (CL-)
V045B407 CNTQ407 CONTAQ 82C591/2 386/486 WriteBack 386/486/Cx WriteBack (CL+)
V046B420 ETEQ421 ETEQ Microsystems 486, 82C4901/2 "BENGAL" (WriteBack)
V047B400 MOSL400 Mosel MS400 Single Chip MS400 486 chipset
V047B403 MOSL403 Mosel MS400 Single Chip MS400 486 chipset x047B400 (T+) <--- Eval Board
V047B405 MOSL405 Mosel MS400 Single Chip MS400 486 chipset x047B400 (TL+)
V049B300 FORX300 36C300 + 36C200/46C402 WriteThru 386 chipset - 1st generation
V049B303 FORX303 36C300 + 36C200/46C402 WriteThru 386 chipset - 1st generation x049B300 (T+)
V050B410 FORX410 46C411 + 46C402 WriteThru 386/486/Cyrix - 2nd generation chipset
V050B413 FORX413 46C411 + 46C402 WriteThru 386/486/Cyrix - 2nd generation chipset x050B410 (T+)
V050B418 FORX418 46C411 + 46C402 WriteThru 386/486/Cyrix - 2nd generation chipset x050B410 (CL-)
V050B419 FORX419 46C411 + 46C402 WriteThru 386/486/Cyrix - 2nd generation chipset x050B410 (CL+)
V051B321 PKDM321 Chips & Technologies PEAK-DM REV-B1 386 C282310 "PEAK-DM" REV-B1
V051B322 PKDM322 Chips & Technologies PEAK-DM REV-B1 386 C282310 "PEAK-DM" REV-B1 x051b321 (T-)
V051B323 PKDM323 Chips & Technologies PEAK-DM REV-B1 386 C282310 "PEAK-DM" REV-B1 x051b321 (T+) <-- Eval Board
V051B324 PKDM324 Chips & Technologies PEAK-DM REV-B1 386 C282310 "PEAK-DM" REV-B1 x051b321 (TL-)
V051B325 PKDM325 Chips & Technologies PEAK-DM REV-B1 386 C282310 "PEAK-DM" REV-B1 x051b321 (TL+)
V051B420 PKDM420 Chips & Technologies PEAK-DM REV-B1 486 C282310 "PEAK-DM" REV-B1, without chipset turbo
V051B428 PKDM428 Chips & Technologies PEAK-DM REV-B1 486 C282310 "PEAK-DM" REV-B1, without chipset turbo x051b420 (CL-)
V051B429 PKDM429 Chips & Technologies PEAK-DM REV-B1 486 C282310 "PEAK-DM" REV-B1, without chipset turbo x051b420 (CL+) <-- Eval Board
V052B320 FORX320 36C311 Single Chip 386SX with Cache 386SX/486SLC with cache
V052B323 FORX323 36C311 Single Chip 386SX with Cache 386SX/486SLC with cache x052B320 (T+) <-- eval board
V053B300 HT32300 Headland HT320 386DX "Shasta" plus cache 386 HT320
V053B303 HT32303 Headland HT320 386DX "Shasta" plus cache 386 HT320 x053B300 (T+) (turbo thru 8042 active high)
V053B30F HT3230F Headland HT320 386DX "Shasta" plus cache 386 HT320 x053B303 (T+)(711)
Sadly none of these are for any boards that I have 😀 Here's the excel spreadsheet of all the BIOSes listed in the .doc files compared to the file listing once everything's extracted, if anyone wants to compare.