Desktop Board Resources
Memory Map
Table 32. System Memory Map
Technical Reference
Address Range (decimal)
1024 K - 2097152 K
960 K - 1024 K
896 K - 960 K
800 K - 896 K
640 K - 800 K
639 K - 640 K
512 K - 639 K
0 K - 512 K
Address Range (hex)
100000 - 7FFFFFF
F0000 - FFFFF
E0000 - EFFFF
C8000 - DFFFF
A0000 - C7FFF
9FC00 - 9FFFF
80000 - 9FBFF
00000 - 7FFFF
Size
2047 MB
64KB
64KB
96KB
160KB
1KB
127KB
512KB
Description
Extended Memory
Runtime BIOS
Reserved
Available high DOS memory (open to the PCI bus)
Video memory and BIOS
Extended BIOS data (movable by memory manager software)
Extended conventional memory
Conventional memory
DMA Channels
Table 33. DMA Channels
DMA Channel Number
0
1
2
3
4
5
6
7
Data Width
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
16bits
16bits
16bits
System Resource
Parallel port
Floppy drive
Parallel port (for ECP or EPP)
DMA controller
Open
Open
Open
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