Asus P I-P55SP3AV P/I-P55SP3AV User's manual - Page 38

Software Guide PS/2 Mouse The "PS/2 mouse function control" default setting is "Enabled". When enabled and a device is connected to it, the PS/2 port uses IRQ 12. If no device is attached to the port, IRQ 12 is not used. Shadow Controls The default setting for the "Video BIOS Shadow" is "Enabled". This copies the video display card BIOS into system DRAM to improve performance. The next lines, "C8000-CBFFF Shadow" to "DC000-DFFFF Shadow" are for shadowing other expansion card ROMs. The default setting for these areas is "Disabled". If you have other expansion cards with ROMs on them, you will need to know which addresses the ROMs use to shadow them specifically. When you shadow a ROM it reduces the memory available between 640KB and 1024KB by the amount used for shadowing. After you have made your selections in BIOS Features Setup, press the key to go back to the main screen. The next item is Chipset Features Setup. 3-11