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Specifications
Maintenance and Service Guide 6–7
System DMA specifications
System memory map specifications
Hardware DMA System function
DMA0 Not applicable
DMA1* Not applicable
DMA2* Not applicable
DMA3 Not applicable
DMA4 Direct memory access controller
DMA5* Not applicable
DMA6 Not assigned
DMA7 Not assigned
*ExpressCard controller can use DMA 1, 2, or 5.
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