Intel® Core™ Ultra 200H and 200U Series Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 844345 | 01/29/2025 | 001 | Public |
MSI Capabilities and MSI Control (MSI_CAPID) – Offset ac
MSI Capabilities and MSI Control Register
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:24 | 0h | RO | Reserved |
| 23 | 1h | RO | 64-bit Address Capable (AC64) PCIe devices must support 64b MSI addressing. |
| 22:20 | 0h | RW | Multiple Message Enable (MME) This field is RW for software compatibility, but only a single message is ever generated. |
| 19:17 | 0h | RO | Multiple Message Capable (MMC) 3'h0 indicates one outstanding message is supported. |
| 16 | 0h | RW | MSI Enable (MSIEN) If set, MSI is enabled. PCICMDSTS.BME must be set for an MSI to be generated. |
| 15:8 | d0h | RO | Next Capability Pointer (NEXT_PTR) This contains a pointer to the next item in the capabilities list which is the Power Management capability. |
| 7:0 | 5h | RO | MSI Capability (CAPABILITY_ID) Indicates an MSI capability. |