43 Chapter B
B.4 1st MB memory map

Table B.4: 1st MB memory map

Addr. range (Hex) Device
F000h - FFFFh System ROM
E000h - EFFFh Reserved for BIOS boot
CC00h - DFFFh available
C000h - CB00h VGA BIOS
B800h - BFFFh CGA/EGA/VGA text
B000h - B7FFh Reserved for graphic mode usage
A000h - AFFFh EGA/VGA graphics
0000h - 9FFFh Base memory
* default setting