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Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-5
ICH Fixed I/O Registers cont
Port Register Name
1F0h-1F7h PIO Mode Command Block Offset for Primary Drive
376h PIO Mode Control Block Offset for Secondary Drive
3F6h PIO Mode Control Block Offset for Primary Drive
4D0h Master PIC Edge/Level Triggered Register
3F6h PIO Mode Control Block Offset for Primary Drive
4D0h Master PIC Edge/Level Triggered Register
4D1h Slave PIC Edge/Level Triggered Register
400-47F Super I/O
F800-F87F Reserved (power management)
FA00-FA3F Reserved (GPIO management)
FC00-FC0F Reserved (SMBUS controller)
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 Memory Address System Function
512 KB FFFFFFFFh to FFF80000 System ROM
3839 MB FFFBFFFFh to 10000000h PCI Memory Expansion
511 MB 0FFFFFFFh to 00100000h HOST or PCI Memory Expansion
128KB 000FFFFFh to 000E0000h System ROM
96 KB 000DFFFFh to 000C8000h PCI Option ROMs
32 KB 000C7FFFh to 000C0000h Video ROM
128 KB 000BFFFFh to 000A0000h Video RAM
640 KB 0009FFFFh to 00000000h Base Memory