Desktop Board Resources; Memory Map; Dma Channels; System Memory Map - Intel D845GVAD2 - P4 Socket 478 ATX Motherboard Product Manual

Intel Desktop Board D845GVAD2 Product Guide

Desktop Board Resources

Memory Map

Table 32.

System Memory Map

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

DMA Channels

Table 33.

DMA Channels

DMA Channel Number
0
1
2
3
4
5
6
7
66
Address Range (hex)
100000 - 7FFFFFF
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
Size Description
2047 MB Extended Memory
64 KB Runtime BIOS
64 KB Reserved
96 KB Available high DOS memory (open
to the PCI bus)
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
Parallel port
Diskette drive
Parallel port (for ECP or EPP)
DMA controller
Open
Open
Open