307013-003 Datasheet, PDF (291/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Chipset Configuration Registers
Bit
Description
Interrupt B Pin Route (IBR) — R/W. This field indicates which physical pin on the
ICH7 is connected to the INTB# pin reported for device 29 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
6:4 _{4h = PIRQE#}
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
NOTE: PIRQA#–PIRQD# are not on Ultra Mobile. Eventhough the register defaults to
a non-ICH7U pin routing, BIOS default sets the register for PIRQE#–PIRQH#.
3
Reserved
Interrupt A Pin Route (IAR) — R/W. This field indicates which physical pin on the
ICH7 is connected to the INTA# pin reported for device 29 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
2:0 4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
NOTE: PIRQA#–PIRQD# are not on Ultra Mobile. Eventhough the register defaults to
a non-ICH7U pin routing, BIOS default sets the register for PIRQE#–PIRQH#.
Intel ^® ICH7 Family Datasheet
291