82801BA Datasheet, PDF (121/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Functional Description
Table 5-27. Interrupt Message Data Format
Bit
Description
31:16
15
14
13:12
11
10:8
7:0
Will always be 0000h.
Trigger Mode: Same as the corresponding bit in the I/O Redirection Table for that interrupt.
1 = Level
0 = Edge.
Delivery Status: If using edge-triggered interrupts, then this bit will always be 1, since only the
assertion is sent. If using level-triggered interrupts, then this bit indicates the state of the interrupt
input.
1 = Assert
0 = Deassert
Will always be 00
Destination Mode: Same as the corresponding bit in the I/O Redirection Table for that interrupt.
1 = Logical.
0 = Physical.
Delivery Mode: This is the same as the corresponding bits in the I/O Redirection Table for that
interrupt.
000 = Fixed
100 = NMI
001 = Lowest Priority
101 = INIT
010 = SMI/PMI
110 = Reserved
011 = Reserved
111 = ExtINT
Vector: This is the same as the corresponding bits in the I/O Redirection Table for that interrupt.
82801BA ICH2 and 82801BAM ICH2-M Datasheet
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