Technical data

Hardware Information
8-9
SIMATIC Box PC 620 Manual
C79000-G7076-C639-02
I/O Adresses of the Interrupt Controllers
Interrupt Assignment Parameterized
interrupt vector,
memory
address
SMI System management interrupt, cannot be masked -
NMI Expansion slots Signal IO Channel Check2 INT 2 H
IRQ 0 Interner Timer (system clock) INT 8 H
IRQ 1 Keyboard INT 9 H
IRQ 2 Cascaded (slave interrupt controller) INT A H
IRQ 3 *) Serial port 2 ( COM2/ IRDA ) [can be cleared in setup] INT B H
IRQ 4 *) Serial por 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 (parallel printer port 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 [generally not used] INT 71 H
IRQ 10 Cardbus controller INT 72 H
IRQ 11 *) Safecard On Motherboard INT 73 H
IRQ 12 *) PS/2 mouse or trackball in keyboard.
Can be cleared in setup, if the mouse or trackball function is
not required.
INT 74 H
IRQ 13 Math. Coprozessor error INT 75 H
IRQ 14 IDE-Interface (primary) INT 76 H
IRQ 15 *) IDE-Controller ( secondary) INT 77 H
Do not use interrupts already assigned in the system.
*) These components can be disabled via the BIOS Setup. The functions are then no
longer available and the resources freed for other components.
**) The onboard port is Plug and Play capable, the occupied resources are administered
by the BIOS.