You don't need the isa card most bios updates work as is even if you screw it up you can try it again. Just make sure you use a good working floppy there cheap as it is so get a fresh one and format it by rite clicking the drive and make it bootable by selecting copy system files, then go to the manufacturer's site for your motherboard and download the bios update or flash and follow there directions for flashing correctly.
And don't flash it while there is a storm going on you could ruin the bios.
hey, i think you are having the same problem as me... I want to recover the bios but i can't since I cant get the floppy to work!! I have a good floppy disk with drivers and all but the system won't read from A: (floppy drive)