First post, by bassybeats
Hey Team, first post here.
I have two boards of which I am trying to get one of them going. I have tested all the parts separately so I know its just the boards ( tested PSU, ram, cpu, vga card, cache, bios on one of them in working unit )
I have two of the MB-4DUVC boards ( the UMC chipset one ) and have ruled out the bios chip, CPU, Cache, ram, PSU and VGA card in the working unit. My ISA post code tester showed up and it is saying that the reset circuit is stuck high. Where do I start looking? I have attached a video of the working unit going through the post codes.
The other one is a PCI48AG-0 board. Again I have ruled out the CPU, Cache, ram, PSU and VGA card in a working unit. I cannot for the life of me find a BIOS file for this board ( i have attached what I dumped off the chip to see if someone can tell if it is corrupted). The post code board shows no activity but the CPU does get warm. Is this likely a BIOS issue?
Any direction would be helpful. The first time playing with 486's since I was a kid and I have forgotten most of it all. But I'm pretty damn sure the CPU's are configured correctly.