Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
MSI Capability ID (MSICID) – Offset 40
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:24 | 0h | RO | Reserved |
| 23 | 1h | RO | (AC64B) 64-bit Address Capable: North Peak is capable of generating 64-bit memory addresses |
| 22:20 | 0h | RO | Reserved |
| 19:17 | 3h | RO | (MMC) Multiple Message Capable: Value of 0x3 indicates the device supports sending 8 interrupt messages (see Table 38 for list of events). |
| 16 | 0h | RW | (MSIE) MSI Enable: If set, MSI is enabled and the legacy interrupts messages (over IOSF sideband) will not be generated |
| 15:8 | 0h | RO | (MSINCP) 64-bit Address Capable: Intel Trace Hub is capable of generating 64-bit memory addresses |
| 7:0 | 5h | RO | (MSICID) MSI Capability ID: MSI Capability ID with a value of 05h indicating the presence of the MSI capability register set |