82374EB Datasheet, PDF (97/208 Pages) Intel Corporation – SYSTEM COMPONENT (ESC)

82374EB 82374SB
Bit
Description
10 8 Delivery Mode (DELMOD) R W 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 10 8
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
7 0 Interrupt Vector (INTVEC) R W The vector field is an 8 bit field containing the interrupt vector for
this interrupt Vector values range from 10 to FEh
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