Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
| ID | Date | Version | Classification |
|---|---|---|---|
| 834576 | 10/10/2024 | 001 | Public |
MSI Message Control (MMC) – Offset 62
This register provides system software control over MSI.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 15:11 | 0h | RO | Reserved (RSVD0) This is a Reserved Register |
| 10 | 0h | RO | Extended Message Data Enable (EMDE) Not implemented |
| 9 | 0h | RO | Extended Message Data Capable (EMDC) Not implemented |
| 8 | 0h | RO | Per-Vector Masking Capable (PVMC) If Set, the Function supports MSI Per-Vector Masking. If Clear, the Function does not support MSI Per-Vector Masking.Not implemented. |
| 7 | 1h | RO | 64b Address Capability (ADD64) Indicates the ability to generate a 64-bit message address. |
| 6:4 | 0h | RO | Multiple Message Enable (MME) Normally this is a RW register. However since only 1 message is supported, these bits are hardwired to 000 = 1 message. |
| 3:1 | 0h | RO | Multiple Message Capable (MMC) Hardwired to 0 indicating request for 1 message. |
| 0 | 0h | RW | MSI Enable (ME) If set to 1 an MSI will be generated instead of an INTx# signal. If set to 0, an MSI may not be generated. |