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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
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
1
IRQ8#
IRQ9
IRQ10
IRQ11
IRQ12
Interrupts and ISA Bus Addresses
Internal timer 1
Keyboard
Interrupt from controller 2
COM2
COM1
Available
Diskette (floppy)
Parallel port
Reserved
Available
Available
Available
Mouse
Interrupts and ISA Bus Addresses
6
6–1
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