Intel D845GLAD Product Guide - Page 66

Desktop Board Resources, Memory Map, DMA Channels

Page 66 highlights

Intel Desktop Boards D845GLLY and D845GLAD Product Guide Desktop Board Resources Memory Map Table 33. System Memory Map Address Range (decimal) 1024 K - 2097152 K 960 K - 1024 K 896 K - 960 K 800 K - 896 K Address Range (hex) 100000 - 7FFFFFF F0000 - FFFFF E0000 - EFFFF C8000 - DFFFF 640 K - 800 K 639 K - 640 K A0000 - C7FFF 9FC00 - 9FFFF 512 K - 639 K 0 K - 512 K 80000 - 9FBFF 00000 - 7FFFF Size 2047 MB 64 KB 64 KB 96 KB 160 KB 1 KB 127 KB 512 KB 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 34. DMA Channels DMA Channel Number Data Width 0 8 or 16 bits 1 8 or 16 bits 2 8 or 16 bits 3 8 or 16 bits 4 8 or 16 bits 5 16 bits 6 16 bits 7 16 bits System Resource Parallel port Diskette drive Parallel port (for ECP or EPP) DMA controller Open Open Open 66

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Intel Desktop Boards D845GLLY and D845GLAD Product Guide
66
Desktop Board Resources
Memory Map
Table 33.
System Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
1024 K - 2097152 K
100000 - 7FFFFFF
2047 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 34.
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
Diskette 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