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

The UM480 variants all seem to lock up with my GA-486VM. The variant I settled on earlier in the thread comes the closest to working completely -- it detects the CPU fine, detects the proper amount of RAM and L2, and then locks up before I can even get into setup. I'm assuming it has something to do …

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

A 27C512 ROM chip equates to 64KB. Therefore, if you a 64KB image, just burn it to a 27C512 EEPROM and replace it with the one on your motherboard. I wouldn't overwrite the existing one. Oh wow I completely bungled that! I'm not sure how I divided 512 by 8 and came up with 128, but that's exactly …

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

So after some preliminary sifting I've narrowed it down to these: V037B401 UMC_401 UMC WriteBack 82C48X 486 WriteBack, Rev 0 *ONLY* V037B402 UMC_402 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* V037B404 UMC_404 UMC WriteBack 82C48X 486 WriteBack, Rev A,B *ONLY* x037B402 (TL-) I think that the …

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

I find myself a little overwhelmed at the sheer amount of stuff to sift through for this. Would anyone by chance know what would work with a UMC480 chipset? Chips are 82C481BF and 82C482AF. I'm not sure what revision that makes my chipset. I'd probably just go for trial and error, as I imagine the …

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