Interrupts And Isa Bus Addresses; Interrupts; Isa Interrupts - DEC AlphaPC 164 User Manual

6 Interrupts and ISA Bus Addresses

This section lists the system and I/O interrupt assignments. It also lists the physical
AlphaPC 164 I/O space assignments.

6.1 Interrupts

Table 24 lists each AlphaPC 164 ISA interrupt and its source.
Table 24 ISA Interrupts
Interrupt Number
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
1
IRQ8#
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
1
The # symbol indicates an active low signal.
Interrupt Source
Internal timer 1
Keyboard
Interrupt from controller 2
COM2
COM1
Available
Diskette
Parallel port
Reserved
Available
Available
Available
Mouse
Available
IDE
IDE
Interrupts and ISA Bus Addresses 21