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Specifications
Maintenance and Service Guide 6–5
System memory map specifications
Size Memory address System function
640 KB 00000000–0009FFFF Base memory
128 KB 000A0000–000BFFFF Video memory
64 KB 000C0000–000CFFFF Video BIOS
64 KB 000E8000–000FFFFF System BIOS
00100000–XFFFFFFF Extended memory (based on
memory installed)
(X+1)0000000–FEDFFFFF PCI bus
FED00000–FED003FF High precision event timer
FEE01000–FFFFFFFF PCI bus