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IFB Register Mapping
9-2 Intel® 460GX Chipset Software Developer’s Manual
06–07h PCISTS PCI Device Status R/W
08h RID Revision Identification RO
09-0Bh CLASSC Class Code RO
0C–0Dh – Reserved –
0Eh HEDT Header Type RO
0F–3Fh – Reserved –
40–43h ACPIBR ACPI Base Address Register R/W
44h ACPIEN ACPI Enable R/W
45h SCIRC Reserved R/W
46–4Bh – Reserved –
4Ch – Reserved R/W
4Dh – Reserved –
4E–4Fh BIOSEN Reserved R/W
50–5Fh – Reserved –
60–63h PIRQRC[A:D] Reserved R/W
64h SERIRQC Serial IRQ Control R/W
65–68h – Reserved –
69h TOM Top of Memory R/W
6A–6Bh MSTAT Miscellaneous Status R/W
6C–75h – Reserved –
76–77h – Reserved R/W
78–7Bh – Reserved R/W
7C–7Fh – Reserved –
80h – APIC Base Address Relocation R/W
81h – Reserved –
82h DLC Deterministic Latency Control R/W
83h – Reserved –
84–85h MGPIOC Muxed GPIO Control R/W
86–8Fh – Reserved –
90-91h PDMACFG PCI DMA Configuration R/W
92-95h DDMABASE Distributed DMA Slave Base Pointer R/W
96-C7h – Reserved –
C8h RTCCFG Real Time Clock Configuration R/W
C9–CFh – Reserved –
D0–D3h GPIOBA GPIO Base Address Register R/W
D4h GPIOE GPIO Enable R/W
D5–DFh – Reserved –
E0h LPCCD LPC COM Decode R/W
E1h LPCFD LPC FDD/LPT Decode R/W
E2h LPCSD LPC Sound Decode R/W
E3h FWHDE Firmware Hub Decode Enable –
E4–E5h LPCGD LPC Generic Decode Range R/W
E6–E7h LPCDE LPC Decode Enables R/W
E8h FWHS Firmware Hub Select –
E9–FFh – Reserved –
Table 9-1. PCI Configuration Registers–Function 0(PCI to LPC/FWH Interface Bridge)
(Cont’d)
Configuration Offset Mnemonic Register Register Access