Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
PCI Command & Status Register (PCICMD_STS) – Offset 4
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31 | 0h | RW | Detected Parity Error (DPE) 0 = No parity error detected. |
| 30 | 0h | RW | Signaled System Error (SSE) 0 = No system error signaled. |
| 29 | 0h | RW | Received Master Abort (RMA) 0 = Root port has not received a completion with unsupported request status from the backbone. |
| 28 | 0h | RW | Received Target Abort (RTA) 0 = Root port has not received a completion with completer abort from the backbone. |
| 27 | 0h | RW | Signaled Target Abort (STA) 0 = No target abort received. |
| 26:25 | 0h | RO/V | DEVSEL# Timing Status (DEV_STS) Hardwired to 0. |
| 24 | 0h | RW | Master Data Parity Error Detected (DPED) 0 = No data parity error received. |
| 23 | 0h | RO/V | Fast Back to Back Capable (FB2BC) Hardwired to 0. |
| 22 | 0h | RO | Reserved |
| 21 | 0h | RO/V | 66 MHz Capable (MHZ_66_CPBL) Hardwired to 0. |
| 20 | 1h | RO/V | Capabilities List (NEW_CPBL) Hardwired to 1. Indicates the presence of a capabilities list. |
| 19 | 0h | RO/V | Interrupt Status (INT_STAT) Indicates status of hot-plug and power management interrupts on the root |
| 18:11 | 0h | RO | Reserved |
| 10 | 0h | RW | Interrupt Disable (INT_DIS) This disables pin-based INTx# interrupts on enabled hot-plug and power |
| 9 | 0h | RO/V | Fast Back to Back Enable (FBE) Hardwired to 0. |
| 8 | 0h | RW | SERR# Enable (SEE) 0 = Disable |
| 7 | 0h | RO/V | Wait Cycle Control (WCC) Hardwired to 0. |
| 6 | 0h | RW | Parity Error Response (PER) 0 = Disable. |
| 5 | 0h | RO/V | Palette Snoop Enable (PSE) Hardwired to 0. |
| 4 | 0h | RO/V | Postable Memory Write Enable (PMWE) Hardwired to 0. |
| 3 | 0h | RO/V | Special Cycle Enable (SCE) Hardwired to 0. |
| 2 | 0h | RW | Bus Master Enable (BME) 0 = Disable. All cycles from the device are master aborted |
| 1 | 0h | RW | Memory Space Enable (MSE) 0 = Disable. Memory cycles within the range specified by the memory base and limit registers are master aborted on the backbone. |
| 0 | 0h | RW/V | I/O Space Enable (IOSE) This bit controls access to the I/O space registers. |