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Looking for OAK OTI 037C VGA card BIOS dump...
- Thread starter george
- Start date
pietja
Experienced Member
H-A-L-9000
Experienced Member
Those are dumps from address space though, not EPROM dumps.
Thank you very much. The first dump is not working at all. With the remaining two the computer works but there is no VGA output...I forgot to mention that my VGA card has dual output, e.g. one VGA and one EGA/CGA connector...Also the PCB is with three oscillators...BIOS sticker says (C) 1988. Somebody burned the EPROM by rotating it into the socket by 180 degrees.
H-A-L-9000
Experienced Member
Thank you very much. The first dump is not working at all. With the remaining two the computer works but there is no VGA output...I forgot to mention that my VGA card has dual output, e.g. one VGA and one EGA/CGA connector...Also the PCB is with three oscillators...BIOS sticker says (C) 1988. Somebody burned the EPROM by rotating it into the socket by 180 degrees.
They all have these features iirc. Are you aware that these cards don't work on faster (fast 386 + 486) computers? A slower test PC is needed.
No, I was not aware. I am testing it on a Pentium 233 MHz machine...Is it a vga BIOS issue or an ISA bus timing?They all have these features iirc. Are you aware that these cards don't work on faster (fast 386 + 486) computers? A slower test PC is needed.
My OAK 037C VGA has BIOS v2.17 (1990) in a single 27C256 EPROM chip, but is NOT an 8bit XT card. I'm not sure at all if it's compatible with your OTI 037C implementation... you can just give it a try if you're out of options
View attachment OTI037C_BIOS Dv2.17v-352_1990.zip
View attachment OTI037C_BIOS Dv2.17v-352_1990.zip
H-A-L-9000
Experienced Member
It could also be caused by a hardware fault:
http://www.vintage-computer.com/vcf...-with-OTI037-EGA-VGA-card&p=375296#post375296
http://www.vintage-computer.com/vcf...-with-OTI037-EGA-VGA-card&p=375296#post375296
They all have these features iirc. Are you aware that these cards don't work on faster (fast 386 + 486) computers? A slower test PC is needed.
I had an OTI037 based card that worked fine in a Pentium machine.