FINDF: MOV DPL,R1 MOV DPH,R0 MOV A,R7 MOV B,A MOV NCNT,R6 JZ FINDF1 INC NCNT FINDF1: MOVX A,@DPTR INC DPTR MOV R5,A MOVX A,@DPTR INC DPTR MOV R6,A MOVX A,@DPTR INC DPTR MOV R7,A LCALL FCMP JNZ FINDF2 MOV A,DPL CLR C SUBB A,#03H MOV R1,A MOV A,DPH SUBB A,#00H MOV R0,A CLR A RET FINDF2: DJNZ B,FINDF1 DJNZ NCNT,FINDF1 MOV A,#0FFH RET