8051 Program – square of a given number 8bit

; square of a given number 8bit
; input: 4000H
; output: 4001H-4002H
	ORG 0H
	DATA_ADDR EQU 4000H
MAIN:
	MOV DPTR,#DATA_ADDR	; fill memory
	MOV A,#25
	MOVX @DPTR,A
	LCALL SQUARE
	SJMP MAIN
SQUARE:
	MOV DPTR,#DATA_ADDR	;load dptr with:DATA_ADDR
	MOVX A,@DPTR	;move data from external memory location to a
	MOV B,A	;move data from a to b
	MUL AB	;multiply and b
	INC DPTR	;increment dptr
	MOV R0,A	;move data from a to r0
	MOV A,B	;move data from b to a
	MOVX @DPTR,A	;move data from a to external memory location
	INC DPTR	;increment dptr
	MOV A,R0	;move data from r0 to a
	MOVX @DPTR,A	;move data from a to external memory location
return:
	RET
	END

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Related topics:
8051 Program - search an element in an array   |   8051 Program - search a byte in array and count match   |   8051 Program - square root of a given number 8bit   |   8051 Program - square and cube operation   |   8051 Program - count number of ones in a byte   |   8051 Program - count 0 and 1 in a byte   |   8051 Program - memory subroutines   |   8051 Program - math subroutines   |   8051 Program - conversion subroutines

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List of topics: 8051

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