Technical Reference Guide
Figure 3-4 shows the system memory map.
4 GB
PCI Memory
Expansion
APIC Config. Space
PCI Memory
Host,
PCI, AGP Area
000E 0000h
000D FFFFh
Option ROM
(128 KB)
DOS Compatibility
Area
Host, PCI,
ISA Area
000B FFFFh
000C 0000h
0009 FFFFh
000A 0000h
0007 FFFFh
0008 0000h
0000 0000h
000F 0000h
000E FFFFh
0010 0000h
000F FFFFh
0100 0000h
00FF FFFFh
Extended Memory
(15 MB)
Extended BIOS
Area
Base Memory
(512 KB)
Fixed Mem. Area
(128 KB)
System BIOS Area
(64 KB)
Graphics/SMRAM
RAM (128 KB)
FFFF FFFFh
High BIOS Area
(2 MB)
Top of DRAM
16 MB
1 MB
640 KB
512 KB
NOTE:
All locations in memory are cacheable. Base memory is always mapped to DRAM. The next 128 KB
fixed memory area can, through the north bridge, be mapped to DRAM or to PCI space. Graphics RAM area is
mapped to PCI or AGP locations.
Figure 3–3. System Memory Map
hp compaq d330 and d530 Series Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition - June 2003
3-7
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