Technical Reference
56
Motherboard Resources
Memory Map
Table 35. Memory Map
Address Range (decimal) Address Range (hex) Size Description
1024 K - 393216 K 100000 - 18000000 383 MB Extended memory
928 K - 1024 K E8000 - FFFFF 96 KB System BIOS
896 K - 928 K E0000 - E7FFF 32 KB System BIOS (available as UMB)
800 K - 896 K C8000 - DFFFF 96 KB Available high DOS memory (open to ISA and
PCI buses)
640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS
0 K - 640 K 00000 - 9FFFF 640 KB Conventional memory
DMA Channels
Table 36. DMA Channels
DMA Channel Number Data Width System Resource
0 8- or 16-bits Audio
1 8- or 16-bits Audio/parallel port
2 8- or 16-bits Diskette drive
3 8- or 16-bits Parallel port (for ECP)/audio
4 Reserved - cascade channel
5 16-bits Open
6 16-bits Open
7 16-bits Open
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