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
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