8-12 Specifications
Memory Map
The system supports system and video shadowing, both controlled through
complementary metal oxide semiconductor (CMOS). The system supports BIOS
as a cacheable area with write protection. The following table shows the
system's memory map.
System Memory Map
Memory Space
Size
Function
000000-0002FFh
768 bytes
BIOS Interrupt Vector Table
000300-0003FFh
256 bytes
BIOS Stack Area
000400-0004FFh
256 bytes
BIOS Data Area
000500-09FFFFh
639 KB
Applications Memory (used by the OS,
device drivers, TSRs, and all DOS
applications
0A0000-0AFFFFh
64 KB
Video Buffer (EGA and VGA)
0B0000-0B7FFFh
32 KB
Video Buffer (monochrome, CGA colour,
VGA monochrome)
0B8000-0BFFFFh
32 KB
Video Buffer (CGA, EGA colour, and VGA
colour)
0C0000-0CBFFFh
48 KB
Video ROM (EGA and VGA)
0CC000-0CFFFFh
16 KB
Unused. (Reserved for Adapter ROMs and
other devices requiring ROMs)
0D0000-0DFFFFh
64 KB
Used by Adapter ROMs (i.e., network
controllers, hard disk controllers, SCSI host
adapters)
0E0000-0EFFFFh
64 KB
Used by System ROM adapters (i.e.,
network controllers with boot capability)
0F0000h-0FFFFFh
64 KB
System AMIBIOS (includes Setup and hard
disk drive utilities)
100000h-1FFFFFF
32 MB
Built-In Extended Memory
2000000-5FFFFFF
64 MB
Extended Memory