How about a MR-BIOS ROM file repository?

Getting old software/games running on older hardware.

Re: How about a MR-BIOS ROM file repository?

Postby Deksor » 2019-3-11 @ 16:11

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Re: How about a MR-BIOS ROM file repository?

Postby Cyrix200+ » 2019-4-23 @ 19:01

I was digging through some boxes of junk I bought in the last few years, and I found this MR BIOS chip.

I have a MiniPro, but how do I find the correct chip type without removing the sticker?

Print on the bottom says 7138179BBA PHILIPPINES UX 50

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Re: How about a MR-BIOS ROM file repository?

Postby keropi » 2019-4-23 @ 19:56

read it as generic 27C512 it should do the trick
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Re: How about a MR-BIOS ROM file repository?

Postby Cyrix200+ » 2019-4-23 @ 20:58

keropi wrote:read it as generic 27C512 it should do the trick


So the software doesn't have a generic 27C512 option. I had tried a few already, but those didn't work. Then I selected OKI MSM27C512 and it worked!

Seems to be the "MR BIOS (tm) Copyright (c) 1992, Microid Research Ver V1.28 Port OPTI33" (Not sure if the 33 is part of the string) dated 01/15/92
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Re: How about a MR-BIOS ROM file repository?

Postby keropi » 2019-4-23 @ 21:34

a trick to remember, chose whatever 27C512 chip you want but uncheck the "Check ID" tickbox on lower left corner of the program - then it will work
Basically the programmer won't check if it's a TI, OKI, AMD, whatever manufacturer and just dump the data
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Re: How about a MR-BIOS ROM file repository?

Postby rmay635703 » 2019-4-24 @ 01:34

I had always hoped for bios upgrades for name brand machines like the Tandy 1000 Rex or ast advantage adventure 4/66d

Ah well
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Re: How about a MR-BIOS ROM file repository?

Postby Moogle! » 2019-4-26 @ 06:01

Aren't 386 BIOSes usually 32K?

You may to dump it as a 27c256, using the above mentioned methods. Wouldn't hurt to try both, I don't think.
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Re: How about a MR-BIOS ROM file repository?

Postby bjwil1991 » 2019-4-26 @ 06:58

Depends on the motherboard. Some were 64KB in size, others were 32KB.
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Re: How about a MR-BIOS ROM file repository?

Postby maxtherabbit » 2019-5-01 @ 14:42

what's the rundown on >502MB support with Mr BIOS? did the 386 BIOSes have any translation support?
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