Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Host PCI Configuration Hardware Initialization Select (HfPCICFGHWIS) – Offset 1cb0
This register selects the PCI function (host root space) HW initialization value to be sourced from soft strap (HfPCICFGSSVx) or BIOS initialized registers (HfPCICFGHWIx)
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:9 | 0h | RO | Reserved (Preserved) (RSVD31) SW must preserve the original value when writing. |
| 8:7 | 0h | RO | Reserved |
| 6 | 0h | RW/L | Subsystem ID (SID) 0: Select soft strap value. |
| 5 | 0h | RW/L | Subsystem Vendor ID (SVID) 0: Select soft strap value. |
| 4 | 0h | RW/L | Base Class Code (BCC) 0: Select soft strap value. |
| 3 | 0h | RW/L | Sub Class Code (SCC) 0: Select soft strap value. |
| 2 | 0h | RW/L | Programming Interface (PI) 0: Select soft strap value. |
| 1 | 0h | RW/L | Interrupt Pin (INTPN) 0: Select soft strap value. |
| 0 | 0h | RW/L | Device ID (DID) 0: Select soft strap value. |