Having a SIS 486 PCI/ISA mini sized system boardwith AMD P75 cpu, I keep getting disk i/o error when booting up. This error appears on 2 identical mobo's where the hardware was swapped from one to the other. Have tried 2 Seagate HDDs ( 1.7 gig & 407 meg ) both with clean installations of Win95, 3 different working FDDs and 3 sets of ribbon cabling. Both mobo's worked in recently upgraded PCs. Have tried all combos of hardware. Drives are detected by BIOS. Disconnecting either HDD or FDD results in same error. As same error with FDD, I am unable to boot from floppy.
Probably something being overlooked ... but I am unsure. Due to nature of urgency ... 150 points for fix.