Compaq 164LX Manuale Utente

Interrupts and ISA Bus Addresses

6–1

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#

Reserved

IRQ9

Available

IRQ10

Available

IRQ11

Available

IRQ12

Mouse