Figure 3-4. System Memorym - Compaq Deskpro EP 6233 Technical Reference Manual

Figure 3-4 shows the system memory map for the system.
Host,
PCI, AGP Area
Host, PCI,
ISA Area
DOS Compatibility
Area
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 3–4. System Memory Map
FFFF FFFFh
High BIOS Area
FFE0 0000h (2 MB)
FFDF FFFFh
PCI Memory
(18 MB)
FEC1 0000h
FEC0 FFFFh
APIC Config. Space
(64 KB)
FEC0 0000h
FEBF FFFFh
PCI Memory
Expansion
(2548 MB)
4000 0000h
3FFF FFFFh
Host/PCI Memory
Expansion
(1008 MB)
0100 0000h
00FF FFFFh
Extended Memory
(15 MB)
0010 0000h
000F FFFFh
System BIOS Area
(64 KB)
000F 0000h
000E FFFFh
Extended BIOS Area
(64 KB)
000E 0000h
000D FFFFh
Option ROM
(128 KB)
000C 0000h
000B FFFFh
Graphics/SMRAM
RAM (128 KB)
000A 0000h
0009 FFFFh
Fixed Mem. Area
(128 KB)
0008 0000h
0007 FFFFh
Base Memory
(512 KB)
0000 0000h
Compaq Deskpro EP Series of Personal Computers
First Edition - April 1998
Technical Reference Guide
4 GB
1 GB
16 MB
1 MB
640 KB
512 KB
3-7