82374EB datasheet(97/208 Pages) INTEL

97 / 208 page

82374EB82374SB

Bit

Description

108

Delivery Mode (DELMOD)RW

The Delivery Mode is a 3 bit field that specifies how the APICs

listed in the destination field should act upon reception of this signal Note that certain Delivery

Modes only operate as intended when used in conjunction with a specific trigger Mode These

restrictions are indicated in the following table for each Delivery Mode

Bits 108

Mode

Description

000

Fixed

Deliver the signal on the INTR signal of all processor cores listed in

the destination Trigger Mode for ‘‘fixed’’ Delivery Mode can be edge

or level

001

Lowest Priority

Deliver the signal on the INTR signal of the processor core that is

executing at the lowest priority among all the processors listed in the

specified destination Trigger Mode for ‘‘lowest priority’’ Delivery

Mode can be edge or level

010

SMI

System Management Interrupt A delivery mode equal to SMI requires

an edge trigger mode The vector information is ignored but must be

programmed to all zeroes for future compatibility

011

Reserved

100

NMI

Deliver the signal on the NMI signal of all processor cores listed in the

destination Vector information is ignored NMI must be programmed

as edge-triggered for proper operation

101

INIT

Deliver the signal to all processor cores listed in the destination by

asserting the INIT signal All addressed local APICs will assume their

INIT state INIT must be programmed as edge-triggered for proper

operation

110

Reserved

111

ExtINT

Deliver the signal to the INTR signal of all processor cores listed in the

destination as an interrupt that originated in an externally connected

(8259A-compatible) interrupt controller The INTA cycle that

corresponds to this ExtINT delivery is routed to the external controller

that is expected to supply the vector A Delivery Mode of ‘‘ExtINT’’

requires an edge trigger mode

Interrupt Vector (INTVEC)RW

The vector field is an 8 bit field containing the interrupt vector for

this interrupt Vector values range from 10 to FEh

82374EB 데이터시트(PDF) 97 Page - Intel Corporation

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