Capabilities List Pointer (CAPP) – Offset 34
Capabilities List Pointer
Bit Range | Default | Access | Field Name and Description |
7:0 | 0x40 | RW/O | Capabilities Pointer (PTR) Indicates that the pointer for the first entry in the capabilities list. BIOS can determine which capabilities will be exposed by including or removing them from the capability linked list. As this register is RWO, BIOS must write a value to this register, even if it is to re-write the default value. Capability Linked List (Default Settings) Offset | Capability | Next Pointer 40h | PCI Express | 80h 80h | Message Signaled Interrupt (MSI) | 90h 90h | Subsystem Vendor | A0h A0h | PCI Power Management | 00h Extended PCIe Capability Linked List Offset | Capability | Next Pointer 100h | Advanced Error Reporting | 000h 140h | Access Control Services | 000h 200h | L1 Substates | 000h 220h | Secondary PCI Express Capability | 000h |