8259A programmable interrupt controller chip in the pc test machine interrupt controller 8259A of the address 20H, 21H. Programming model according to the type set interrupt vector interrupt, interrupt mask register IMR 8259 to clear the corresponding bit (to allow interrupt), interrupt service to return before the end of the end of the command is to be used: MOV AL, 20H OUT 20H, AL dos interrupt when the end of Return IMR should correspond to position 1, to close the break.

8259\8259.doc
....\8259.txt
....\8259SHU.txt
....\8259SHU2222.txt
....\8_8259A可编程中断控制器实验.doc
8259

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