System Memory Map - Compaq EX Series Maintenance & Service Manual

ICH Fixed I/O Registers cont
Port
1F0h-1F7h
376h
3F6h
4D0h
3F6h
4D0h
4D1h
400-47F
F800-F87F
FA00-FA3F
FC00-FC0F
NOTE: When the POS_DEC_EN bit is set, additional I/O ports get positively
decoded by the ICH.
6.1.5

System Memory Map

Size
512 KB
3839 MB
511 MB
128KB
96 KB
32 KB
128 KB
640 KB
Register Name
PIO Mode Command Block Offset for Primary Drive
PIO Mode Control Block Offset for Secondary Drive
PIO Mode Control Block Offset for Primary Drive
Master PIC Edge/Level Triggered Register
PIO Mode Control Block Offset for Primary Drive
Master PIC Edge/Level Triggered Register
Slave PIC Edge/Level Triggered Register
Super I/O
Reserved (power management)
Reserved (GPIO management)
Reserved (SMBUS controller)
Memory Address
FFFFFFFFh to FFF80000
FFFBFFFFh to 10000000h
0FFFFFFFh to 00100000h
000FFFFFh to 000E0000h
000DFFFFh to 000C8000h
000C7FFFh to 000C0000h
000BFFFFh to 000A0000h
0009FFFFh to 00000000h
System Function
System ROM
PCI Memory Expansion
HOST or PCI Memory Expansion
System ROM
PCI Option ROMs
Video ROM
Video RAM
Base Memory
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-5