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MOV B,@R0
INC R0
BACK:MOV A,@R0
CJNE A,B,LOOP
JMP LOOP1
LOOP:JC LOOP 1
MOV B,A
LOOP1:INC R0
DJNZ R2,BACK
NEXT:MOV 60H,B
END
5)Copy string from ram 200h to ram 40h
ORG 0000H
MOV DPTR,#MYDATA
MOV R0,#40H
MOV R2,#13H
BACK: CLR A
MOVC A,@A+DPTR
MOV @R0,A
INC DPTR
INC R0
DJNZ R2,BACK
HERE :SJMP HERE
ORG 200H
MYDATA: DB “VITUNIVERSITY”
END
6)COPYING TO LOCATION 60H
ORG 0000H
MOV DPTR,#MYDATA
MOV R0,#40H
MOV R2,#11H
MOV R1,#60H
MOV R3,#11H
BACK:CLR A
MOVC A+@A+DPTR
MOV @R0,A
INC DPTR
INC R0
DJNZ R2,BACK
MOV R0,#40H
AGAIN: MOV A,@RO
MOV @R1,A
INC R0
INC R1
DJNZ R3,AGAIN
HERE: SJMP HERE
ORG 200H
MYDATA:DB “ANYA SOROHI”
END
7)EXCHANGE VALUES
ORG 0000H
MOV P1,#0FBH
MOV R0,#40H
MOV A,P1
LOOP:MOVB,#10
DIV AB
XCH A,B
ADD A,#30H
MOV @R0,A
XCH A,B
INC R0
JNZ LOOP
END
8)MOV VALUE 55H TO P1,P2,P3 SIMULTANEOUSLY
ORG 0000H
MOV A,#55H
AGAIN:MOV P0,A
MOV P1,A
MOV P2,A
MOV P3,A
ACALL DELAY
CPL A
SJMP AGAIN
DELAY:MOV R5,#2
HERE1:MOV R4,#180
HERE2:MOV R3,#255
HERE3:DJNZ R3,HERE3
DJNZ R4,HERE2
DJNZ R5,HERE1
RET
9)250 MICROSECS DELAY USING TIMERS
ORG 0000H
MOV TMOD,#10H
AGAIN: TL1,#1AH
MOV TH1, #0FFH
SETB TR1
BACK:JNB TF1,BACK
CLR TR1
CPL P1.5
CLR TF1
SJMP AGAIN
END
10)MOVING VALUES FROM P1 TO P2
ORG 0000H
MOV A,#0FFH
MOV P1,A
BACK: MOV A,P1
MOV P2,A
SJMP BACK
END