Table 12 lists the system memory map.
Table 12. System Memory Map
Address Range
(decimal)
1024 K - 8388608 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
2.2
DMA Channels
Table 13. DMA Channels
DMA Channel Number
0
1
2
3
4
5
6
7
Address Range
(hex)
100000 - 1FFFFFFFF
F0000 - FFFFF
E0000 - EFFFF
C8000 - DFFFF
A0000 - C7FFF
9FC00 - 9FFFF
80000 - 9FBFF
00000 - 7FFFF
Data Width
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
16 bits
16 bits
16 bits
Technical Reference
Size
Description
8191 MB
Extended memory
64 KB
Runtime BIOS
64 KB
Reserved
96 KB
Potential available high DOS
memory (open to the PCI bus).
Dependent on video adapter used.
160 KB
Video memory and BIOS
1 KB
Extended BIOS data (movable by
memory manager software)
127 KB
Extended conventional memory
512 KB
Conventional memory
System Resource
Open
Open
Open
Open
DMA controller
Open
Open
Open
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