Interrupt Assignment (Hardware) - Siemens SIMATIC Box PC 820 Manual

Motherboard
2.12

Interrupt Assignment (Hardware)

Interrupt
NMI Expansion slots signal I/O channel
IRQ 0 Internal timer (system clock)
IRQ 1 Keyboard buffer full
IRQ 2 Cascading of interrupt controller 2
IRQ 3 Serial port 2 (COM2) can be enabled via Setup
IRQ 4 Serial port 1 (COM1/TTY) can be enabled via Setup
IRQ 5
IRQ 6 Floppy
IRQ 7 Parallel port 1 /printer port LPT1/EPP/ECP) can be enabled via Setup
IRQ 8 Battery-backed real-time clock
IRQ 9 VGA controller usually unassigned
IRQ 10 MPI (recommended for Plug & Play), can be enabled via Setup
IRQ 11 Reserved for SafeCard on motherboard (SOM)
IRQ 12 S/2 Mouse/keyboard trackball can be enabled via Setup if no need for mouse or trackball
function.
IRQ 13 Arithmet. coprocessor error
IRQ 14 Primary IDE interface
IRQ 15 Secondary IDE interface
2-36
Description
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03