FM 456-2 Functions and Technical Data
4-15
FM 456-2 Application Function Module Installation, Hardware, and Startup
C79000-G7076-C458-01
Interrupt Assignment
Table 4-6
Interrupt Assignment
Interrupt
Function
NMI
Group signal for fault signals
IRQ0
System timer
IRQ1
Reserved for keyboard
IRQ2
Cascading of the 2nd interrupt controller
IRQ3
Reserved for COM2, otherwise free
IRQ4
Reserved for COM1, otherwise free
IRQ5
Reserved for LPT2, otherwise free
IRQ6
Reserved for floppy disk drive, otherwise free
IRQ7
Reserved for LPT1, otherwise free
IRQ8
Real time clock
IRQ9
Software interrupt, diverted to IRQ2
IRQ10
Reserved for IF 964-DP or free
IRQ11
Reserved for CP1401 or free
IRQ12
PS2 mouse, otherwise free
IRQ13
Numeric coprocessor
IRQ14
Hard disk
IRQ15
S7 system interrupt