Finally here is the MR BIOS for the "OPTI 386WB" a.k.a Shuttle HOT-307. […]
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Finally here is the MR BIOS for the "OPTI 386WB" a.k.a Shuttle HOT-307.
Speedsys refuses to dump a BIOS without a working HDD in the system for some reason although it dumps the BIOS to its own the directory on the floppy... that's the reason for the delay.
I also made a new BIOS dump of the OPTI 391 i486 MR BIOS just in case something was wrong with the old one and replaced the file in the message two pages back. I will also post it here.
Both files are dumped with Speedsys using a clean DOS 8 boot disk. If for some reason Speedsys makes non functional dumps I will try to find a better utility.
OPTI 391 i386 MR BIOS. From a working generic OPTI 391 "OPTI 386WB" motherboard.
OPTI 391 MR BIOS i386 .rar
OPTI 391 i486 MR BIOS. From a non working generic OPTI 391 "ST0486WB" motherboard. The BIOS (chip) works perfectly fine with the Shuttle HOT-403 OPTI 391 i486 motherboard I used for dumping the file.
OPTI 391 MR BIOS i486.rar
As both motherboards seems to be reference design boards and they both have WB in the name I guess either WB dosn't stand for "Write Back" or more likely reference design OPTI 391 motherboards use a write back L2 caching scheme.
Don't try these BIOS files unless you have a way to recover your old BIOS in case it dosn't work!!!