INTEL82801 Datasheet, PDF (178/414 Pages) Intel Corporation – 82801AB (ICH0) I/O Controller Hub

Hub Interface-to-PCI Bridge Registers (D30:F0)
Table 7-1. PCI Configuration Map (HUB-PCI—D30:F0) (Sheet 2 of 2)
Offset
3Ch
3E–3Fh
50–51h
70h
82h
90h
92h
Mnemonic
INT_LINE
BRIDGE_CNT
CNF
MTT
PCI_MAST_STS
ERR_CMD
ERR_STS
Register Name/Function
Interrupt Line
Bridge Control
ICH Configuration Register
Multi-Transaction Timer
PCI Master Status
Error Command Register
Error Status Register
NOTES:
1. Refer to ICH Specification Updates for the value of the Revision ID.
2. Addresses that are not listed in the above table are reserved and read only.
Default
00h
0000h
0000h
00h
00h
00h
00h
Type
RO
R/W
R/W
R/W
R/W
R/W
R/W
7.1.1
VID—Vendor ID Register (HUB-PCI—D30:F0)
Offset Address: 00–01h
Default Value: 8086h
Attribute:
Size:
RO
16 bits
Bit
Description
15:0 Vendor Identification Number. This is a 16-bit value assigned to Intel. Intel VID = 8086h.
7.1.2
DID—Device ID Register (HUB-PCI—D30:F0)
Offset Address: 02–03h
Default Value:
2418h (ICH: 82801AA)
2428h (ICH: 82801AB)
Attribute:
Size:
RO
16 bits
Bit
Description
15:0
Device Identification Number. This is a 16 bit value assigned to the ICH hub interface to PCI
bridge (i.e. Device #2). See default above for value in this register.
7-2
82801AA and 82801AB ICH Datasheet