sy3.asm

来自「微机原理课程 所有讲义PPT 课程全实验（包括代码程序设计实验报告） 习」· 汇编 代码 · 共 51 行

      ORG 0000H
      AJMP TMAIN
      ORG 001BH
      LJMP T1INT
      ORG 0300H
TMAIN: MOV SP,#5FH
       MOV DPTR,#8003H
       MOV A,#88H
       MOVX @DPTR,A
       MOV 30H,#00H
       MOV A,30H
       MOV DPTR,#TAB
       MOVC A,@A+DPTR
       MOV DPTR,#8004H
       MOVX @DPTR,A
       MOV A,#08H
       MOV DPTR,#8001H
       MOVX @DPTR,A
       MOV TMOD,#61H
       MOV TL0,#0B0H
       MOV TH0,#3CH
       MOV TL1,#9CH
       MOV TH1,#9CH
       SETB ET1
       SETB EA
       SETB TR0
       SETB TR1
LP:    JNB TF0,LP
       CLR TF0
       INC 30H
       MOV A,30H
       CJNE A,#0AH,LP0
       MOV 30H,#00H
LP0:   MOV A,30H
       MOV DPTR,#TAB
       MOVC A,@A+DPTR
       MOV DPTR,#8004H
       MOVX @DPTR,A
       CLR P3.5
       SETB P3.5
       MOV TL0,#0B0H
       MOV TH0,#3CH
       SETB TR0
       SJMP LP
T1INT: MOV A,#00H
       MOV DPTR,#8001H
       MOVX @DPTR,A
       RETI
TAB:   DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H   
       DB 7FH,6FH,77H,7CH,39H,5EH,79H,71H