System Memory - Compaq AP400 Maintenance And Service Manual

Memory Address Size
FFFFFFFFh to FFF80000h 512 KB
FEEFFFFFh to FEE00000h 1024 KB
FECFFFFFh to FEC00000h 1024 KB
C7FFFFFFh to 50000000h 1,966,080 KB
3FFFFFFFh to 01000000h 1,032,192 KB
00FFFFFFh to 00100000h 15,360 KB
000FFFFFh to 000F0000h 64 KB
000EFFFFh to 000E0000h 64 KB
000DFFFFh to 000C0000h 128 KB
000BFFFFh to 000A0000h 128 KB
0009FFFFh to 00000000h 640 KB
1 KB = 1024 bytes. Any memory above host memory is non-cacheable.
Table 7-5

System Memory

System Function
System ROM
Local APIC Address Range
I/O APIC Address Range
PCI Memory Expansion
HOST Memory Expansion
HOST or ISA Memory Expansion
System ROM
Expansion System ROM
Option ROM
Video RAM
Base Memory
Compaq Professional Workstation AP400 Maintenance and Service Guide
7-7