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
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