masm memcpy

.MODEL FLAT, STDCALL
OPTION NOKEYWORD:<size>

.CODE
f_memcpy PROC USES ESI EDI dest : DWORD, source : DWORD, size : DWORD
	MOV EDI, dest
	MOV ESI, source
	MOV ECX, size
AGAIN_:
	LODSB
	STOSB
	LOOP AGAIN_
	RET
f_memcpy ENDP

END