82801FB Datasheet, PDF (242/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

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 ICH6 does not perform any
checks for conflicts.
Table 6-3. Variable I/O Decode Ranges
Range Name
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
LAN
LPC Generic 1
LPC Generic 2
I/O Trapping Ranges
Mappable
Size (Bytes) Target
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
Anywhere in 64 KB I/O Space
Anywhere in 64 KB I/O Space
Anywhere in 64 KB I/O Space
64
16
8
4
32
32
32
32
32
256
64
256
128
32
64
8
8
8
8
64
128
16, 32, or
641
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
LAN Unit
LPC Peripheral
LPC Peripheral
Anywhere in 64 KB I/O Space 1 to 256 Trap on Backbone
NOTE:
1. Decode range size determined by D31:F0:ADh:bits 5:4
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Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet