Chapter 3
Memory Map
The following table provides the common PC/AT memory allocations. These are DOS-level addresses. The
OS typically hides these physical addresses by way of memory management. Memory below 000500h is
used by the BIOS.
Table 3-2. Memory Map
Base Address
00000000h
-
000A0000h
-
000B0000h
-
000B8000h
-
000C0000h
-
000D0000h
-
000E0000h
-
000F0000h
-
Top 0, 1, 4, or 8MB of DRAM
FFE00000h
-
CoreModule 730
Function
0009FFFFh
Conventional Memory
000AFFFFh
Graphics Memory
000B7FFFh
Mono Text Memory
000BFFFFh
Color Text Memory
000CFFFFh
Standard Video BIOS
000DFFFFh
Reserved for Extended BIOS
000EFFFFh
Extended System BIOS Area
000FFFFFh
System BIOS Area (Storage and RAM Shadowing)
Integrated Graphics Memory
FFFFFFFFh
System Flash
Reference Manual
Hardware
17
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