0

...

     ;counter1 init
    mov al, 01110100b       
    out 063h, al

     ;counter2 init
    mov al, 10010100b       
    out 063h, al

...

; ISR executed when count2 ends                                 
ISR_COUNT12 PROC               
            cli
              ;procedure to be protected from the other ISR interrupts


            sti

            IRET
ISR_COUNT12 ENDP

每次counter12（PIC-8253）完成计数后，我都需要重新执行ISR_COUNT12。每次counter2变为0时都会调用ISR_COUNT12。

4

1 回答 1

0

无法屏蔽软件中断..

于 2013-01-12T20:11:21.827 回答