I have tried a few different floppy disks and I get similar results on this system but when I swap in a 5150 motherboard, everything works fine againīoth the XT-IDE and the floppy are DOS 6.22. I also tried with with an MDA card in place of the VGA with no change. When I did, I still get the same issue on this motherboard. The only board I can pull out in this setup is the XT-IDE. I do have extra cards and drives as well that I've been testing but that gets done on a different system. My setup is the same for all of the boards I've tested, I just swap out the motherboard. Luckily it's been mostly easy things like blown caps, broken traces, bad memory. I have a number of 51 motherboards that I have been testing and fixing for a friend that owns a computer shop. I tested the RAM (NEC D41256C -15) in one of my chip testers and they all passedĪ little more background. I verified that the floppy drive, floppy disk, cable, controller, video card, XT-IDE card and power supply all work flawlessly with other motherboards (both 51 boards)
However it will transfer over ĭiskCopy a: a: also fails when trying to duplicate a floppy It can boot from the floppy disk/drive, but when I format the floppy disk it gives me over 4GB in bad sectors. No shorts on the motherboard voltage rails.Ĭomputer will POST and boot without issue from both Floppy and from XT-IDE Visual inspection of the board - No cold solder joints, no component shorts and no broken traces that I can find. Original IBM 5160 (256 - 640) motherboard with 256 populated in Bank 0 Yes, you read that right, 4 GIGABYTES! See the attached pic. It eventually completes the format and then tells me that I have 4GB in bad sectors. When I format a floppy disk it gets about 70ish percent through, and then I hear it start to struggle.
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