Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Interrupt Line (INTLN) – Offset 3c
The register is used to communicate interrupt line routing information.
Implementation Notes: Because of the legacy implementation of the INTLN field, which was reset by D3HOT to D0 Reset, but not to FLR, this already works well with existing SW (despite the fact that the FLR section in the PCI Express Specification does not have this register in the preservation list), and so this legacy implementation remains unchanged and is documented here as reset by D3ONLY, which by excluding FLR, is a deviation from D3RST definition by excluding FLR.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 7:0 | 0h | RW | Interrupt Line (INTLN) Hardware does not use this field directly. It is used to communicate to software the interrupt line that the interrupt pin is connected to. |