帮你改了一下,正确无误:
ORG 000H
AJMP START
ORG 000BH
AJMP TIME0
ORG 30H
START: MOV P1,#0FFH
MOV R7,#150
MOV R6,#2
MOV TMOD,#00000001B
MOV TH0,#3CH
MOV TL0,#0B0H
SETB EA
SETB ET0
SETB TR0
LOOP: AJMP LOOP
TIME0:
DJNZ R7,T_RET MOV R7,#150 DJNZ R6, T_RET
MOV R6,#2
CPL P1.0
T_RET: MOV TH0,#3CH
MOV TL0,#0B0H
RETI END |