text1.asm

proteus的一个小定时计时

ORG 0000H
SE18: MOV P1,#0FFH
LO34: MOV A,#0FEH
LO33: MOV P1,A
      LCALL SE19
      RL A
      SJMP LO33
SE19: MOV R6,#0FFH
LO36:  MOV R7,#0FFH
LO35: DJNZ R7,LO35
      DJNZ R6,LO36
RET

END