Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Unsupported Request Error Status (URES) – Offset f0
This register is only reset by a loss of core power
This is the Primary to Sideband Unsupported Request Error Status Register
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:9 | 0h | RO | Reserved (RSVD) Reserved |
| 8 | 0h | RW/1C | Unsupported Request Detected (URD) Set to 1 by hardware upon detecting an Unspported Request on IOSF Primary interface that is not considered Advisory Non-Fatal Used only when ENABLE_IEH is set |
| 7:2 | 0h | RO | Reserved (RSVD_1) Reserved |
| 1 | 0h | RW/1C/P | Unsupported Non-Posted Request Error Status (UNPE) When set, indicates that P2SB has received unsupported non-posted request;Used only when ENABLE_AER is set |
| 0 | 0h | RW/1C/P | Unsupported Posted Request Error Status (UPE) When set, indicates that P2SB has received unsupported posted request;Used only when ENABLE_AER is set |