On 29/07/2010 13:24, ivp wrote: > s designed to be used between a PC keyboard >> and a PC, uses a "Wedge". Now, I do not think that thing >> simply hard-wires the in and out connectors as in this case. >> I'm pretty certain that it contains some electronics to isolate >> interfaces > Jan-Erik, > > If so, those electronics would have to allow the bi-directionality of > the lines > > Joe They do. They don't connect simply across the pins either. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .