Technical data

Hardware Information
6-9
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
I/O addresses of interrupt controllers
Interrupt Description Parameterized
Interrupt Vector,
Memory
Address
SMI System management interrupt, cannot be masked -
NMI Expansion slots Signal IO Channel Check2 INT 2 H
IRQ 0 Internal timer (system clock) INT 8 H
IRQ 1 Keyboard INT 9 H
IRQ 2 Cascading of interrupt controller 2 INT A H
IRQ 3 *) Serial port 2 ( COM2/IRDA ), can be cleared in setup INT B H
IRQ 4 *) Serial port 1 (COM1/TTY), can be cleared in setup INT C H
IRQ 5 **) Cardbus controller INT D H
IRQ 6 *) Floppy controller INT E H
IRQ 7 *) Parallel port 1 (printer interface LPT1/EPP/ECP), can be
cleared in setup
INT F H
IRQ 8 Battery-backed real-time clock (RTC) INT 70 H
IRQ 9 VGA controller INT 71 H
IRQ 10 Cardbus controller INT 72 H
IRQ 11 *) USB INT 73 H
IRQ 12 *) PS/2 mouse or trackball on keyboard. Can be cleared in
setup if the mouse or trackball functions are not required.
INT 74 H
IRQ 13 Math. coprocessor error INT 75 H
IRQ 14 IDE interface (primary) INT 76 H
IRQ 15 *) IDE controller (secondary) INT 77 H
Please watch out for interrupts that have already been assigned in the system.
*) These components can be disabled using BIOS SETUP. The functions are then no longer
available, and the resources are freed for other components.
**) The on-board interface is compatible with plug&play; the assigned resources are managed
by the BIOS.