recopilation program 89c52/89c51 using keil

SUM


assembly language:
MOV DPTR,#0E000H
MOVX A,@DPTR
MOV R0,A
MOV DPTR,#0E001H
MOVX A,@DPTR
ADD A,R0
MOV DPTR,#0E002H
MOVX @DPTR,A
FIN: SJMP FIN
END





SUBTRACTION

assembly language

MOV DPTR,#0E000H
MOVX A,@DPTR
MOV R0,A
MOV DPTR,#0E001H
MOVX A,@DPTR
SUBB A,R0
MOV DPTR,#0E002H
MOVX @DPTR,A
FIN: SJMP FIN
END






MULTIPLICATION

assembly language

MOV DPTR,#0E000H
MOVX A,@DPTR
MOV B,A
MOV DPTR,#0E001H
MOVX A,@DPTR
MUL AB
MOV DPTR,#0E002H
MOVX @DPTR,A
MOV A,B
MOV DPTR,#0E003H
MOVX @DPTR,A
FIN: SJMP FIN
END






DIVISION

assembly language

MOV DPTR,#0E000H
MOVX A,@DPTR
MOV B,A
MOV DPTR,#0E001H
MOVX A,@DPTR
DIV AB
MOV DPTR,#0E002H
MOVX @DPTR,A
MOV A,B
MOV DPTR,#0E003H
MOVX @DPTR,A
FIN: SJMP FIN
END


SUM WITH CARRY

assembly language

DATO1: MOV DPTR,#0E000H
MOVX A,@DPTR
MOV R0,A
DATO2: INC DPTR
MOVX A,@DPTR
MOV R1,A
MOV A,R0
ADD A,R1
CARRIE: JC BRINCOC
INC DPTR
MOVX @DPTR,A
INC DPTR
CLR A
MOVX @DPTR,A
SJMP FIN
BRINCOC: INC DPTR
MOVX @DPTR,A
INC DPTR
MOV A,#01H
MOVX @DPTR,A
SJMP FIN


SUBTRACTION WITH CARRY

assembly language

DATO1: MOV DPTR,#0E000H
MOVX A,@DPTR
MOV R0,A
DATO2: INC DPTR
MOVX A,@DPTR
MOV A,R0
SUBB A,R1
JC CARES
INC DPTR
CLR A
MOVX @DPTR,A
JC FIN
CARES: INC DPTR
CPL A
INC A
MOVX @DPTR,A
ADD A,#01H
INC DPTR
MOV A,#01H
MOVX @DPTR,A
SJMP FIN



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