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System DMA specifications
Hardware DMA System function
DMA0 Not applicable
DMA1* Not applicable
DMA2* Not applicable
DMA3 Not applicable
DMA4 Direct memory access controller
DMA5* Available for PC Card
DMA6 Not assigned
DMA7 Not assigned
*PC Card controller can use DMA 1, 2, or 5.
System memory map specifications
Size Memory address System function
640 KB 00000000-0009FFFF Base memory
128 KB 000A0000-000BFFFF Video memory
48 KB 000C0000-000CBFFF Video BIOS
160 KB 000C8000-000E7FFF Unused
64 KB 000E8000-000FFFFF System BIOS
15 MB 00100000-00FFFFFF Extended memory
58 MB 04800000-07FFFFFF Super extended memory
58 MB 04800000-07FFFFFF Unused
2 MB 08000000-080FFFFF Video memory (direct access)
4 GB 08200000-FFFEFFFF Unused
64 KB FFFF0000-FFFFFFFF System BIOS
98 Chapter 6 Specifications