|Switch 1:|| ON : Normal setting
OFF: Continously perform the Power On Self Test (POST)
|Switch 2:|| ON : 8087 math coprocessor chip is installed ( IC socket U4, adjacent to power connectors)
OFF: 8087 math coprocessor chip is not installed
|Switches 3 and 4:|| Installed motherboard RAM.
3=ON , 4=ON: Only bank 0 populated
3=OFF, 4=ON : Only banks 0/1 populated
3=ON , 4=OFF: Only banks 0/1/2 populated
3=OFF, 4=OFF: Banks 0/1/2/3 populated
|Switches 5 and 6:|| Video card type.
5=OFF, 6=OFF: MDA (monochrome)
5=OFF, 6=ON : CGA, at 40 column by 25 line mode
5=ON , 6=OFF: CGA, at 80 column by 25 line mode
5=ON , 6=ON: Cards with a BIOS expansion ROM (e.g. EGA / PGA / VGA)
|Switches 7 and 8:|| Floppy drive count.
7=ON , 8=ON: 1 floppy drive
7=OFF, 8=ON : 2 floppy drives
7=ON , 8=OFF: 3 floppy drives
7=OFF, 8=OFF: 4 floppy drives