ti85 only has two i/o lines... check out www.ticalc.org... Michael McCann wrote: > Does anyone know how a TI85 communicates? I want to build a device the > plugs into > a TI85. It has 2 inputs and 2 outputs. Is there any documentation for > beginners to TI hardware? If so where? > > Thanks, > > --Sonar Boy (aka Subterfusion)