307013-003 Datasheet, PDF (258/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Register and Memory Mapping
6.3.2 Variable I/O Decode Ranges
Table 6-3 shows the Variable I/O Decode Ranges. They are set using Base Address
Registers (BARs) or other configuration bits in the various PCI configuration spaces.
The PNP software (PCI or ACPI) can use their configuration mechanisms to set and
adjust these values.
Warning:
The Variable I/O Ranges should not be set to conflict with the Fixed I/O Ranges.
Unpredictable results if the configuration software allows conflicts to occur. The ICH7
does not perform any checks for conflicts.
Table 6-3.
Variable I/O Decode Ranges
Range Name
Mappable
ACPI
IDE Bus Master
Native IDE Command
Native IDE Control
USB UHCI Controller #1
USB UHCI Controller #2
USB UHCI Controller #3
USB UHCI Controller #4
SMBus
AC ’97 Audio Mixer
AC ’97 Audio Bus Master
AC ’97 Modem Mixer
AC ’97 Modem Bus Master
TCO
GPIO
Parallel Port
Serial Port 1
Serial Port 2
Floppy Disk Controller
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
Anywhere in 64 KB I/O
Space
96 Bytes above ACPI Base
Anywhere in 64 KB I/O
Space
3 Ranges in 64 KB I/O
Space
8 Ranges in 64 KB I/O
Space
8 Ranges in 64 KB I/O
Space
2 Ranges in 64 KB I/O
Space
Size
(Bytes)
64
16
8
4
32
32
32
32
32
256
64
256
128
32
64
8
8
8
8
Target
Power Management
IDE Unit
IDE Unit
IDE Unit
USB Unit 1
USB Unit 2
USB Unit 3
USB Unit 4
SMB Unit
AC ’97 Unit
AC ’97 Unit
AC ’97 Unit
AC ’97 Unit
TCO Unit
GPIO Unit
LPC Peripheral
LPC Peripheral
LPC Peripheral
LPC Peripheral
258
Intel ^® ICH7 Family Datasheet