code: def _memcopy(ins):
      
      output = _16bit_oper(ins.quad[3])
      output.append('ld b, h')
      output.append('ld c, l')
      output.extend(_16bit_oper(ins.quad[1], ins.quad[2], reversed=True))
      output.append('ldir')  # ***
  
      return output
docs: Copies a block of memory from param 2 addr
      to param 1 addr.