Compaq AlphaPC 164LX - Manual (Page 39)

Interrupts and ISA Bus Addresses 6–1
6
Interrupts and ISA Bus Addresses
This section lists the system and I/O interrupt assignments. It also lists the physical
AlphaPC 164LX I/O space assignments.
6.1 Interrupts
Table 6–1 lists each AlphaPC 164LX ISA interrupt and its source.
Table 6–1 ISA Interrupts
Interrupt Number Interrupt Source
IRQ0 Internal timer 1
IRQ1 Keyboard
IRQ2 Interrupt from controller 2
IRQ3 COM2
IRQ4 COM1
IRQ5 Available
IRQ6 Diskette (floppy)
IRQ7 Parallel port
IRQ8#
1
Reserved
IRQ9 Available
IRQ10 Available
IRQ11 Available
IRQ12 Mouse