
Chapter 3 Hardware
24 Reference Manual Express-IBR
Memory Map
The following table provides the common PC/AT memory allocations. Memory below 000500h is used by
the BIOS.
Table 3-2. Memory Map
Base Address Function
00000000h - 0009FFFFh Conventional Memory
000A0000h - 000AFFFFh Graphics Memory
000B0000h - 000B7FFFh Mono Text Memory
000B8000h - 000BFFFFh Color Text Memory
000C0000h - 000CFFFFh Standard Video BIOS
000D0000h - 000DFFFFh Reserved for Extended BIOS
000E0000h - 000EFFFFh Extended System BIOS Area
000F0000h - 000FFFFFh System BIOS Area (Storage and RAM Shadowing)
Top 32, 64, or 128MB of
Physical Memory
Shared memory of Integrated Graphics
FFE00000h - FFFFFFFFh System Flash
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