Device Mapping
Processor Memory Address Map
Address Range
00000 to 9FFFF
A0000 to BFFFF
C0000 to C7FFF
C8000 to DFFFF
E0000 to EFFFF
F0000 to FFFFF
B-2
Function
Main memory
PCI/ISA video buffer memory
Video memory BIOS
PCI/ISA expansion board BIOS and
buffer memory
ISA adapter RAM
System BIOS memory
Size
640 KB
128 KB
32 KB
96 KB
64 KB
64 KB