8051 Program – external ram to internal ram

; copy data from external ram to internal ram
	ORG 0H
	IRAM_ADDR EQU 40H
	ERAM_ADDR EQU 0000H
	BYTE_COUNT EQU 10
MAIN :
	MOV DPTR,#ERAM_ADDR
	MOV R7,#BYTE_COUNT
	MOV A, #0
memfill:	MOVX @DPTR,A
	INC A
	INC DPTR
	DJNZ R7,memfill
	MOV R0,#IRAM_ADDR
	MOV DPTR, #ERAM_ADDR
	MOV R7,#BYTE_COUNT
	LCALL COPY
	SJMP MAIN
COPY:
	MOV A, #0
loop:	MOVX A, @DPTR
	MOV @R0, A
	INC R0
	INC DPTR
	DJNZ R7, loop
	RET
	END

---

<< Previous :: Up :: Next >>

---

Related topics:
8051 Program - clear register banks   |   8051 Program - clear bit memory   |   8051 Program - clear stack memory   |   8051 Program - rom to ram   |   8051 Program - internal ram to external ram   |   8051 Program - ram to ram   |   8051 Program - memory subroutines   |   8051 Program - math subroutines   |   8051 Program - conversion subroutines

---

List of topics: 8051

---