汇编语言源程序清单如下: 王老师at89c51晶振频率12兆还是六兆,有要求吗?陈辉
org 0000h
ljmp main
org 0010h
main:mov p1,#0feh;冲氧
acall del
mov p1,#0ffh;停止冲氧
acall dell
ajmp main
del:mov r5,#05h
del3:mov r4,#03ch
del2:mov r1,#50
del0:mov r2,#100
del1:mov r3,#100
djnz r3,$
djnz r2,del1
djnz r1,del0
cpl p1.3
djnz r4,del2
djnz r5,del3
ret
dell:mov r6,#5
dell1:acall del
djnz r6,dell1
ret
end