MOVX @DPTR,A AJMP LED LOOP1: RET INT:INC R5
CJNE R5,#20,LOOP2 INC R0 DEC R2 DEC R3 MOV R5,#0 LOOP2: MOV TH0,#9EH MOV TL0, #58H RETI
TAB: DB 3fH,06H,5bH,4fH,66H,6dH,7dH,07H,7fH,6fH DELAY: MOV R7,#02H ;延时1秒子程序 DL1: MOV R6,#0FFH DL2: DJNZ R6,DL2 DJNZ R7,DL1 RET INT1: CLR TR0
PUSH PSW ;中断保护程序 PUSH A PUSH 00H PUSH 01H PUSH 02H PUSH 03H PUSH 04H