I've got a BI-025C HT12 286 motherboard with an AMD 286 12/s CPU I've got it running after the battery leaking and I can enter the Bios if I power it down for a day or so but the usual "del, esc, F1" etc doesn't work, is a floppy disk needed? Also does anyone have the manual mainly for the 4 pins as "J4" next to the keyboard connector I think J4 is for an external battery but I don't know, I don't have a battery connected at the moment