in case you haven't figured it out, that "$4" link really isn't $4. More like $20. Still better than the GraphLink, but it isn't $4. I built one myself. Antoine Defosseux wrote: > why a $4 serial link is incompatible with a Ti89? > If anyone know a program link work with a ti89, send me! -- Dan Lauber - motto:Mean people suck jlauber@execpc.com Soon to come - www.timathsci.com