Acpi Base Address (Function 0); Acpi Enable (Function 0); Sci Irq Routing Control - Intel 460GX Software Developer’s Manual

LPC/FWH Interface Configuration
11.1.8

ACPI Base Address (Function 0)

Address:
Default Value:
Attribute:
Bit
31:16
15:6
5:1
0
11.1.9

ACPI Enable (Function 0)

Address:
Default Value
Attribute:
Bit
7:1
0
11.1.10

SCI IRQ Routing Control

Address:
Default Value:
Attributes:
Bit
7:3
2:0
11-4
40-43h
00000001h
Read/Write
Reserved.
Base Address: Provides the 64 bytes of I/O space.
Reserved.
Resource Indicator: Tied to 1 to indicate I/O space
44h
00
Read/Write
Reserved.
ACPI Enable: When this bit is set to '1', decode of the I/O range pointed to by the ACPI base
register is enabled, and the ACPI power management Function is enabled. Note that the APM
power management ranges (B2/B3h) are always enabled and are not affected by this bit.
45h
00h
Read/Write
Reserved.
SCI IRQ Map: Specifies on which pin the SCI will appear on internally. If not using the APIC,
software must program this register to "000". This interrupt is not sharable. When this interrupt is
chosen, the corresponding interrupt pin is blocked and the SERIRQ frame entry is blocked. This
interrupt can be shared with a PCI interrupt.
Bits
000
001
010
011
100
101
110
111
Description
Description
Description
SCI Map
FEMPTY#
Reserved
Intel® 460GX Chipset Software Developer's Manual
IRQ9
SCI
IRQ8
IRQ0
IRQ10
IRQ11