8279.asm

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      ORG  0
      AJMP START

      ORG  16H
START:

      MOV  DPTR,#07FFFH
      MOV  A,#0D1H
      MOVX @DPTR,A
      MOV  A,#10H
      MOVX @DPTR,A
      MOV  A,#2AH
      MOVX @DPTR,A
      MOV  A,#0A0H
      MOVX @DPTR,A
      MOV  A,#90H
      MOVX @DPTR,A
      MOV  A,#50H
      MOVX @DPTR,A
      MOV  DPTR,#07EFFH
      MOV  A,#0
      MOV  R7,#8
AGAIN:MOVX @DPTR,A
      DJNZ R7,AGAIN

NEXT: JNB  IE0,$
      CLR  IE0
      MOVX A,@DPTR
      MOV  DPTR,#KDT
      MOVC A,@A+DPTR
      MOV  DPTR,#07EFFH
      MOVX @DPTR,A
      AJMP NEXT

KDT:
         DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H
         DB 7FH,6FH,77H,7CH,58H,5EH,79H,71H
         DB 01H,02H,04H,08H,10H,20H,40H,80H 
         DB 80H,40H,20H,10H,08H,04H,02H,01H

      END