First post, by clb
I have this old multi-IO controller that has a floppy disk connector on it. Trying to use this with a 486 PC to connect a 5.25" floppy drive or a 3.5" floppy drive, but whichever I try (tried 4x 5.25" drives and 2x 3.5" drives, of which the 3.5" drives at least are tested on other systems to be known working), I get a DOS boot error
Floppy disk(s) fail (C0)
BIOS has a drive setting for both primary and secondary floppy disks:
but adjusting those settings does not work (e.g. the 3.5" drives are 1.44MB, tried them as either primary or secondary - also trying all combinations did not work)
I can't quite figure out if there are any other settings that would affect this in BIOS, so I'm thinking that either the IO controller card is dead, or it has some jumper configuration I am missing.
The IO controller has markings
Before I rule the card out as dead, any chance someone might have the manual or reference for the jumper settings? See photos in attachments.