Datasheet

Processor Integrated I/O (IIO) Configuration Registers
230 Datasheet, Volume 2
3.3.7.7 ARBID—Arbitration ID Register
This is a legacy register carried over from days of serial bus interrupt delivery. This
register has no meaning in IIO. It just tracks the APICID register for compatibility
reasons.
3.3.7.8 BCFG—Boot Configuration Register
ARBID
Bus: 0 Device: 5 Function: 4 MMIO BAR: WINDOW_0
Offset: 2
Bit Attr
Reset
Value
Description
27:24 RO 0b
Arbitration ID
Just tracks the APICID register.
23:0 RV 0h Reserved
7:28 RV 0h Reserved
BCFG
Bus: 0 Device: 5 Function: 4 MMIO BAR: WINDOW_0
Offset: 3
Bit Attr
Reset
Value
Description
7:1 RV 0h Reserved
0RW1b
Boot Configuration
This bit is default = 1 to indicate FSB delivery mode. A value of 0 has no effect. Its
left as RW for software compatibility reasons.