Compaq Deskpro 4000N - Chapter 6 Graphics Subsystem; Introduction

Compaq Deskpro 4000S and 4000N Personal Computers 7-5
Table 7-5
System Memory Map
Size Memory Address System Function
256 KB FFFFFFFFh to FFFC0000h System ROM
3839 MB FFFBFFFFh to 10000000h PCI Memory Expansion
255 MB 0FFFFFFFh to 00100000h HOST or PCI Memory Expansion
128KB 000FFFFFh to 000E0000h System ROM
96 KB 000DFFFFh to 000C8000h ISA/PCI option ROMs
32 KB 000C7FFFh to 000C0000h Video ROM
128 KB 000BFFFFh to 000A0000h Video RAM
640 KB 0009FFFFh to 00000000h Base Memory
All memory above the first 256 MB is non-cacheable. All PCI memory is non-cacheable.