Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
| ID | Date | Version | Classification |
|---|---|---|---|
| 834576 | 10/10/2024 | 001 | Public |
PCI Express Capabilities (XCAP) – Offset 42
This is the PCI Express Capabilities registers. Refer description for each individual field below for more details of the register functionality.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 15:14 | 0h | RO | Reserved (RSVD_M) Reserved. |
| 13:9 | 0h | RO | Interrupt Message Number (IMN) The Root Port does not have multiple MSI interrupt numbers. |
| 8 | 0h | RW/O | Slot Implemented (SI) Indicates whether the root port is connected to a slot. Slot support is platform specific. BIOS programs this field, and it is maintained until a platform reset. |
| 7:4 | 4h | RO | Device / Port Type (DT) Indicates this is a PCI-Express root port |
| 3:0 | 2h | RO | Capability Version (CV) Version 2.0 indicates devices compliant to the PCI Express 2.0 and 3.0 specification which incorporates the Register Expansion ECN. |