Samsung 164BX Interrupts and ISA Bus Addresses, ISA Interrupts, Interrupt Number Interrupt Source

6

Interrupts and ISA Bus Addresses

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

6.1 Interrupts

Table 6–1lists each Alpha 164UX ISA interrupt and its source.

Table 6–1 ISA Interrupts		(Sheet 1 of 2)
Interrupt Number	Interrupt Source
IRQ0	Internal timer
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

Interrupts and ISA Bus Addresses 6–1