This is a typical
Memory Map of a
PC.
Hex Address Purpose
0-3FF Interrupt Vectors
400-47F ROM-BIOS RAM
480-5FF Basic and system function RAM
600-9FFFF Program Memory
0A0000-0AFFFF VGA/EGA Video Memory
0B0000-0B0FFF Monochrome Video Memory
0B8000-0BFFFF CGA Video Memory
0C0000-0CFFFF Hard Disk ROM
0D0000-0D7FFF Spare ROM
0D8000-0DFFFF Spare ROM
0E0000-0E7FFF Spare ROM
0E8000-0EFFFF Spare ROM
0F0000-0F3FFF Spare ROM
0F4000-0F7FFF Spare ROM
0F8000-0FDFFF Spare ROM
0FC000-0FDFFF ROM-BIOS
0FE000-0FFFFF ROM-BIOS
This memory map assumes Real Mode operation.