备份.sdi

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,,,      ORG  0000H
0000,80 2E,,      SJMP  MAIN
,,,      ORG  0030H
,,,
0030,75 90 0F,MAIN,MAIN:  MOV  P1,#0FH     ;清零
,,,       ;SETB  P1.7       ;灯亮
0033,75 80 71,LP,LP:    MOV  P0,#71H
0036,12 00 78,,       CALL  DELAY
0039,30 90 08,,       JNB  P1.0,QD1    ;扫描
003C,30 91 14,,       JNB  P1.1,QD2
003F,30 92 20,,       JNB  P1.2,QD3
0042,80 EF,,       SJMP  LP
0044,D2 94,QD1,QD1:   SETB  P1.4
0046,C2 97,,       CLR  P1.7
0048,75 80 06,,       MOV  P0,#06H
004B,12 00 78,,       CALL  DELAY
004E,30 93 20,,       JNB  P1.3,MAI
0051,80 F1,,       SJMP  QD1
0053,D2 95,QD2,QD2:   SETB  P1.5
0055,C2 97,,       CLR  P1.7
0057,75 80 5B,,       MOV  P0,#5BH
005A,12 00 78,,       CALL DELAY
005D,30 93 11,,       JNB  P1.3,MAI
0060,80 F1,,       SJMP  QD2
0062,D2 96,QD3,QD3:   SETB  P1.6
0064,C2 97,,       CLR  P1.7
0066,75 80 4F,,       MOV  P0,#4FH
0069,12 00 78,,       CALL  DELAY
006C,30 93 02,,       JNB  P1.3,MAI
006F,80 F1,,       SJMP  QD3
0071,75 90 0F,MAI,MAI:   MOV  P1,#0FH
0074,D2 97,,       SETB P1.7
0076,80 BB,,       SJMP LP
,,,
0078,7E 14,DELAY,DELAY:  MOV  R6,#20       ;20*50*2=2MS
007A,7F 32,D1,D1:     MOV  R7,#50
007C,DF FE,,        DJNZ  R7,$
007E,DE FA,,        DJNZ  R6,D1
0080,22,,        RET
000E,,,END