First post, by retroegde
I need help identifying this 8088 motherboard because it has a keyboard header that I need to properly wire-up. I also need to know what the switch settings are. I'll give details on this PC, which i think is OEM, if it helps with the board identification. The only identification I see on the board is PC-820804-35. Only marking on the case are referencing a model number of PC401. Case and motherboard both say made in Taiwan R.O.C. I had to cut the case to even get the motherboard out.
When I power it up it beeps once, attempts to read a floppy disk, and then the hard disk fires up and is loud as <bleep>. No video. The computer has two video cards and I've tried both without messing with any of the current settings.
I've been able to test the following items in my IBM 5150
- The monochrome card (DTK PII-134) works.
- The floppy controller card and drive (IBM labeled TM-100) also work.
It came with a loaded AST SixPakPlus which I couldn't get to work in the IBM 5150 but I may need to play around with it some more
The PC came with a Computer Memories 6426-S 21mb hard drive (wd1002s-wx2) controller which I can't test in my 5150 but I'm purchased a 5160 power supply so I'll be able to test soon.
The newer video card is a VEGA Video-7 (1986 with 1988 on BIOS). I haven't tried this out in the 5150 yet.
The BIOS is m5l2764K and I want to get the equipment to dump and read the contents.
I've checked Total Hardware (https://arvutimuuseum.ee/th99/) but not many motherboards without a keyboard connector.