Pci Interrupt Lines - Siemens SIMATIC HMI IPC577C Operating Instructions Manual

17.3.2

PCI Interrupt Lines

The interrupts are assigned to devices by BIOS. Exclusive non-shared interrupts are
available for the first two PCI slots as well as for DP12 and the first Ethernet interface.
This means that applications or realtime operating system extensions can operate these
devices exclusively and with high-performance without having to share the interrupt with
other devices.
Table 17- 1
Interrupt
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
IRQ16
IRQ17
IRQ18
IRQ19
IRQ20
IRQ21
IRQ22
IRQ23
Table 17- 2
Interrupt
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
SIMATIC HMI IPC577C
Operating Instructions, 10/2010, A5E02368074-02
Interrupt sharing in APIC mode
System timer
PS/2 keyboard controller emulation
Interrupt controller 2
Reserved for Com Port 2 (COM2)
Com Port 1 (COM1)
Free
Reserved
Free
Realtime clock
ACPI-SCI (system control interrupt)
Free
Free
PS/2 mouse controller emulation
Coprocessor
IDE controller 2 (enhanced mode) or IDE controller
1 (compatible mode)
IDE controller 1 (compatible mode) or free
(enhanced mode)
Graphics, PCI Express Bridge
LAN1-exclusive
LAN2, IDE controller 1 (enhanced mode)
DP12/MPI exclusive
PCI slot 1
PCI slot 2
USB UHCI controller (USB1.1)
USB-EHCI controller (USB2.0)
Interrupt sharing in PIC mode
System timer
PS/2 keyboard controller emulation
Interrupt controller 2 (cascade)
Reserved for Com Port 2 (COM2)
Com Port 1 (COM1)
Detailed descriptions
17.3 System resources
Interrupt type
ISA-exclusive
ISA-exclusive
ISA-exclusive
Free or ISA exclusive (COM2)
ISA-exclusive
Free
Reserved
Free
ISA-exclusive
ISA/PCI-shareable
Free
Free
ISA-exclusive
ISA-exclusive
ISA-exclusive
ISA-exclusive
PCI-shared
PCI-exclusive
PCI-shared
PCI-exclusive
PCI-exclusive
PCI-exclusive
PCI-shared
PCI-shared
Interrupt type
ISA-exclusive
ISA-exclusive
ISA-exclusive
Free or ISA exclusive (COM2)
ISA-exclusive
171