FILTER6: MOV A,7FH MOV B,#3 M1jL AB MOV DPTR，#2000H ADD A,DDL MOV DPL,A MOV A, R6 MOVX @DPTR，A INC DPTR MOV A, R2 MOVX @DPTR,A INC DPTR MOV A,R3 MOVX @DPTR,A MOV A,7FH INC A CJNE A,#15,FSA1 CLR A FSA1: MOV 7FH,A MOV R0,#15 INC DPTR FSA2: MOV A, DPL CJNE A,#30H,FSA3 MOV DPL,#0 FSA3: MOVX A,@DPTR MOV R7,A INC DPTR MOVX A,@DPTR MOV R4,A INC DPTR MOVX A,@DP'TR MOV R5,A INC DPTR CLR 3AH MOV A,R6 MOV C,ACC.7 MOV 38H,C XRL A,R7 JNB ACC.7,LOOP6 CPL 3AH MOV A,R6 MOV C,ACC.6 MOV ACC.7,C MOV R6,A MOV A,R7 MOV C,ACC.6 MOV ACC.7,C MOV R7,A CLR C MOV A,R6 SUBB A,R7 JZ LOOP7 CLR PSW.5 CLR 39H JB ACC.7,LOOP10 CJNE R4,#0,LOOP11 CJNE R5,#0,LOOP11 LOOP7: JB 3AH,LOOP13 MOV A,R3 ADD A,R5 MOV R3,A MOV A,R2 ADDC A,R4 MOV R2,A JNC LOOP9 SETB 39H CLR C LOOP8: CLR PSW.5 LCALL FSDT LOOP9: CJNE R2,#0,FAB CJNE R3,#0,FAB MOV R4,#41H RET FAB: MOV A,R6 MOV C,38H MOV ACC.7,C XCH A,R4 MOV R6,A RET LOO10: CJNE R2,#0,LOOP12 CJNE R3,#0, LOOP12 MOV A ,R7 MOV R6,A SJMP LOOP7 LOOP11: CPL PSW.5 LOOP12: CLR C LCALL FSDT SJMP LOOP6 LOOP13: MOV A,R3 CLR C SUBB A,R5 MOV R3,A MOV A,R2 SUBB A,R4 MOV R2,A JNC LOOP14 CLR A CLR C SUBB A,R3 MOV R3,A CLR A SUBB A,R2 MOV R2,A CPL 38H LOOP14: SETB C SJMP LOOP8 MOV A, R4 MOV R6,A DJNZ R0,FSA2 MOV C, A.7 DEC A DEC A DEC A DEC A MOV A.7,C MOV R4,A MOV A,R4 MOV @R1,A INC R1 MOV A,R2 MOV @R1,A INC R1 MOV A,R3 MOV @R1,A DEC R1 DEC R1 RET