HP Workstation x1000 hp workstation x1000 - technical reference guide - Page 74

PIC mode, Virtual

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system board assigned device interrupts determined partly by the operating system. Note that some of the interrupts are allocated dynamically. Interrupt Source APIC Controller Interrupt Signalling on of device INTA - PCI slot 3 (32/33) INTB - PCI slot 3 (32/33) INTC - PCI slot 3 (32/33) INTD - PCI slot 3 (32/33) INTA - PCI slot 4 (32/33) INTB - PCI slot 4 (32/33) INTC - PCI slot 4 (32/33) INTD - PCI slot 4 (32/33) INTA - onboard SCSI controller AGP - INTA, PCI Slot 1 - INTC, PCI Slot 2 - INTA PCI Audio - INTA, AGP - INTB, PCI Slot 1 - INTD, PCI Slot 2 - INTB BT_INT, PCI Slot 1 - INTA, PCI Slot 2 - INTC USB - INTA, PCI Slot 1 - INTB, PCI Slot 2 - INTD Device on Primary IDE Channel Device on Secondary IDE Channel Serial Interrupt from Super I/O ICH2 ICH2 ICH2 ICH2 ICH2 ICH2 ICH2 Input IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 IRQ8 INTA (PIC mode)1 BT_INT BT_INT BT_INT BT_INT BT_INT BT_INT BT_INT BT_INT BT_INT INT INTB INT INTC INT INTD INT IRQ14 INT IRQ15 INT SERIRQ INT (APIC modes) APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus APIC bus 1. In PIC mode, the interrupts signaled to the P64H are chained as INTC to the ICH2. Three major interrupt modes are available: • PIC mode: This mode uses only legacy interrupt controllers, so only one processor can be supported. Because this system has dual-processor capability, Windows 2000 and NT doesn't choose this mode as the default. However, during Windows 2000 and NT installation, you can select this mode. • Virtual wire mode: This mode is implemented with APIC controllers in the ICH2 and P64H and used during boot time. The 74 Chapter 2

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system board
assigned device interrupts
Chapter 2
74
determined partly by the operating system. Note that some of the
interrupts are allocated dynamically.
Three major interrupt modes are available:
PIC mode
: This mode uses only legacy interrupt controllers, so only
one
processor
can
be
supported.
Because
this
system
has
dual-processor capability, Windows 2000 and NT doesn’t choose this
mode
as
the
default.
However,
during
Windows
2000
and
NT
installation, you can select this mode.
Virtual
wire
mode
:
This
mode
is
implemented
with
APIC
controllers in the ICH2 and P64H and used during boot time. The
Interrupt Source
APIC Controller
Interrupt Signalling on
of device
Input
(PIC
mode)
1
(APIC
modes)
INTA - PCI slot 3 (32/33)
IRQ0
BT_INT
APIC bus
INTB - PCI slot 3 (32/33)
IRQ1
BT_INT
APIC bus
INTC - PCI slot 3 (32/33)
IRQ2
BT_INT
APIC bus
INTD - PCI slot 3 (32/33)
IRQ3
BT_INT
APIC bus
INTA - PCI slot 4 (32/33)
IRQ4
BT_INT
APIC bus
INTB - PCI slot 4 (32/33)
IRQ5
BT_INT
APIC bus
INTC - PCI slot 4 (32/33)
IRQ6
BT_INT
APIC bus
INTD - PCI slot 4 (32/33)
IRQ7
BT_INT
APIC bus
INTA - onboard SCSI controller
IRQ8
BT_INT
APIC bus
AGP - INTA, PCI Slot 1 - INTC, PCI
Slot 2 - INTA
ICH2
INTA
INT
APIC bus
PCI Audio - INTA, AGP - INTB, PCI
Slot 1 - INTD, PCI Slot 2 - INTB
ICH2
INTB
INT
APIC bus
BT_INT, PCI Slot 1 - INTA, PCI
Slot 2 - INTC
ICH2
INTC
INT
APIC bus
USB - INTA, PCI Slot 1 - INTB, PCI
Slot 2 - INTD
ICH2
INTD
INT
APIC bus
Device on Primary IDE Channel
ICH2
IRQ14
INT
APIC bus
Device on Secondary IDE Channel
ICH2
IRQ15
INT
APIC bus
Serial Interrupt from Super I/O
ICH2
SERIRQ
INT
APIC bus
1.
In PIC mode, the interrupts signaled to the P64H are chained as INTC to the ICH2.