You could try the PAL for GVT-2 for a start:

FIC 486-GVT-2 missing PAL

majestyk wrote on 2022-01-29, 19:50:

You could try the PAL for GVT-2 for a start:

FIC 486-GVT-2 missing PAL

Thank you for your prompt response!

I will try it and report back with the result.

majestyk wrote on 2022-01-29, 19:50:

You could try the PAL for GVT-2 for a start:

FIC 486-GVT-2 missing PAL

Unfortunately it does not work.
No POST beeps, no display signal.

My PC Analyzer Diagnostic Card shows the FF AMI BIOS code - that means probably that the motherboard is trying to boot.
This means that either the JEDEC file is not appropriate, or the mobo has another unidentified fault.

Please (anyone) let me know if the appropriate JEDEC file becomes available.

In any case, thank you again.

Found the U2 GAL16V8B and Award BIOS from another board.
Will test and report back.

Here's the GAL dump from my 486-GVT-2 board (in case it helps).
https://www.ultimateretro.net/en/motherboards/2380#downloads

computerguy08 wrote on 2022-03-15, 12:07:

Here's the GAL dump from my 486-GVT-2 board (in case it helps).
https://www.ultimateretro.net/en/motherboards/2380#downloads

Thank you for your interest.

If my efforts fail with the new bios & jedec file, I will try yours...

Best regards.

computerguy08 wrote on 2022-03-15, 12:07:

Here's the GAL dump from my 486-GVT-2 board (in case it helps).
https://www.ultimateretro.net/en/motherboards/2380#downloads

I finally found a GAL dump from a working 486-GVT and it works!