Msi_Capid-Message Signaled Interrupts Capability Id (D1:F0) - Intel 925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU Datasheet

R
8.1.27 MSI_CAPID—Message Signaled Interrupts Capability ID
(D1:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
When a device supports MSI, it can generate an interrupt request to the processor by writing a
predefined data item (a message) to a predefined memory address.
The reporting of the existence of this capability can be disabled by setting MSICH (CAPL [0] @
7Fh). In that case walking this linked list will skip this capability and, instead, go directly from
the PCI PM capability to the PCI Express capability.
Bit
15:8
7:0
®
Intel 82925X/82925XE MCH Datasheet
Access &
Default
RO Pointer to Next Capability: This field contains a pointer to the next item in the
A0h capabilities list that is the PCI Express* capability.
RO Capability ID:
05h
05h = Identifies this linked list item (capability structure) as being for MSI
registers.
Host-PCI Express* Graphics Bridge Registers (D1:F0)
1
90h
A005h
RO
16 bits
Description
131