Address and Interrupt Tables C-1A p p e n d i x CAddress and Interrupt TablesC.1 System Memory MapAddress Range Definition Function000000 - 09FFFF 640 KB memory Base memory0A0000 - 0BFFFF 128 KB video RAM Reserved for graphics displaybuffer0C0000 - 0AFFFF Video BIOS and SystemServices0E0000 - 0EFFFF256 KB system ROMPOST when power-onPMU for SMIFree for runtime0F0000 - 0FFFFF System BIOS100000 - 7FFFFF Extended memory7 MBOnboard memory8 MB