Read the F. Manual xD
Otherwise google manufacturer's website for assistance.
General tip: Hit tab key on computer cold turkey startup to see the "dos screen", if you already do, look for things like "Hit Del to enter setup", only you want to enter Bios upgrade.
This way you dont need a bootable floppy disc as long as computer can read your device.
General tip2: Older computer's dont normally have a hot key to enter bios updater, so you have to anyway lookup website and download the bios update with also a boot floppy.
Welcome to the forums, you posted in wrong category btw.