Desktop board resources, Memory map, Dma channels – Intel D865GBF User Manual
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Technical Reference
85
Desktop Board Resources
Memory Map
Table 38. System Memory Map
Address Range (decimal) Address Range (hex)
Size
Description
1024 K - 4194304 K
100000 - FFFFFFFF
4095 MB
Extended Memory
960 K - 1024 K
F0000 - FFFFF
64 KB
Runtime BIOS
896 K - 960 K
E0000 - EFFFF
64 KB
Reserved
800 K - 896 K
C8000 - DFFFF
96 KB
Available high DOS memory (open to the
PCI bus)
640 K - 800 K
A0000 - C7FFF
160 KB
Video memory and BIOS
639 K - 640 K
9FC00 - 9FFFF
1 KB
Extended BIOS data (movable by
memory manager software)
512 K - 639 K
80000 - 9FBFF
127 KB
Extended conventional memory
0 K - 512 K
00000 - 7FFFF
512 KB
Conventional memory
DMA Channels
Table 39. DMA Channels
DMA Channel Number
Data Width
System Resource
0
8 or 16 bits
1
8 or 16 bits
Parallel port
2
8 or 16 bits
Floppy drive
3
8 or 16 bits
Parallel port (for ECP or EPP)
4
8 or 16 bits
DMA controller
5 16
bits
Open
6 16
bits
Open
7 16
bits
Open