Need Help: BIOS for TMC PCI48PG4-1.10 (486 w/ 3xPCI & 2x VLB) \ VOGONS

Need Help: BIOS for TMC PCI48PG4-1.10 (486 w/ 3xPCI & 2x VLB)

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First post, by RetroTechVeteran

Posted on 2021-08-01, 20:32

RetroTechVeteran Offline

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Hi, I need your help! =)

I need a BIOS (AMI WinBIOS from 12/15/93??) for the TMC PCI48PG4 motherboard.
It's a Socket3 motherboard with 3x PCI, 2x VLB slots and on board I/O interface.
The chipset is OPTI 82C895 (with 82C822, 82C602, 82C621A).

I just got this board and unfortunately it was damaged from battery leakage (already fixed)
and it's missing the cache & BIOS chips. Cache isn't a problem, but I can't find the BIOS
for download anywhere! =(

Can you please help me? Can I use a BIOS from a similar motherboard with OPTI 895 chipset?

Reply 1 of 3, by Horun

Posted on 2021-08-02, 01:30

Horun Offline

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The old TMC archive does not list a BIOS for your board model: http://web.archive.org/web/19970505191651/htt … mc.com/b486.htm
You can try another boards BIOS as long as it is from a board with same chipsets including the SMC super i/o....

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 3, by RetroTechVeteran

Posted on 2021-08-25, 05:02

RetroTechVeteran Offline

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Joined: 2021-08-01, 18:49
Location: Germany

Thanks! I tried several BIOS images for this OPTI chipset now, but nothing works well (ISA & VLB seem to be ok, but PCI won't work and some settings will crash/freeze the motherboard).

I'm still searching for the right BIOS: Award 2A4UKM21-00 would be great (I found a posting here in this forum with the right motherboard "TMC PCI48PG" - flonky_tash was searching for settings/manual in 2019, but unfortunately I cannot contact the user for a BIOS dump request). =(

If anyone has this BIOS (Award 2A4UKM21 or AmiBIOS for MyComp/TMC PCI48PG or PCI48PG4 please let me know)!

The Award-BIOS should be out there, I found one dl-link on Wims BIOS (OPTi802G822 chipset) but it always redirects me to biosagentplus?!?! =(
Please help! =)

Reply 3 of 3, by moturimi1

Posted on 2025-10-28, 17:06

moturimi1 Offline

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RetroTechVeteran wrote on 2021-08-25, 05:02:
I'm still searching for the right BIOS: Award 2A4UKM21-00 would be great (I found a posting here in this forum with the right mo […]
Show full quote

I'm still searching for the right BIOS: Award 2A4UKM21-00 would be great (I found a posting here in this forum with the right motherboard "TMC PCI48PG" - flonky_tash was searching for settings/manual in 2019, but unfortunately I cannot contact the user for a BIOS dump request). =(

If anyone has this BIOS (Award 2A4UKM21 or AmiBIOS for MyComp/TMC PCI48PG or PCI48PG4 please let me know)!

The Award-BIOS should be out there, I found one dl-link on Wims BIOS (OPTi802G822 chipset) but it always redirects me to biosagentplus?!?! =(
Please help! =)

I uploaded it here: https://theretroweb.com/motherboards/s/tmc-my … ix-pci48pg#bios
Unfortunately I do not own the AWARD Bios. Hopefully a collector can upload it to the Retro Web as well.

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