a test architecture accesses ip core test wrappers within an ic using a link instruction register . an ieee p1500 standard is in development for providing test access to these individual cores via a test structure called a wrapper . the wrapper resides at the boundary of the core and provides a way to test the core and the interconnections between cores . the test architecture enables each of the plural wrappers in the ic , including wrappers in cores embedded within other cores , with separate enable signals .