Datasheet

System Address
140 Intel
®
82845G/82845GL/82845GV GMCH Datasheet
Figure 5-1. Memory System Address Map
Figure 5-2. Detailed Memory System Address Map
Main Memory
Address Range
PCI Memory
Address Range
Top of Main
Memory
4 GB
Graphics
Memory
AGP Graphics
Aperture
Independently Programmable
Non-overlapping Windows
DOS Area
(640 KB)
000000h
0A0000h
09FFFFh
0C0000h
0BFFFFh
0E0000h
0DFFFFh
0FFFFFh 1 MB
896 KB
768 KB
640 KB
0 KB
0F0000h
0EFFFFh
960 KB
DOS
Compatibility
Memory
0 MB
Optionally
mapped to the
AGP
Std PCI/ISA
Video Mem
(SMM Mem)
128 KB
Expansion Card
BIOS
and Buffer Area
(128 KB;
16 KB x 8)
Lower BIOS Area
(64 KB; 16 KB x 4)
Upper BIOS Area
(64 KB)
System Memory
Space
64 GB
1 MB
16 MB
640 KB
15 MB
2 GB
4 GB Max TOM
Optional ISA Hole
Main Memory
Range
PCI
Memory
Range
Extended
Memory
AGP
Window
Graphics
Aperture