At 05:22 PM 10/31/01 -0600, Lawrence Lile wrote: >Boy, I have the same problem. A real showstopper when you go to demonstrate >a prototype. Usinf SEETRON 2X16 character LCD's. Anybody got an idea? This is symptomatic of improper timing of signals. Can you toss some nops into the lowest level routines, and stretch out the setup and hold times? It could be bounce and ringing on the cable. A quick check would be to add a series network of 0.1uF and 120 ohm resistors to each signal line. This won't be a perfect match, but it's hard to measure cable impedance through email :) -- Dave's Engineering Page: http://www.dvanhorn.org Got a need to read Bar codes? http://www.barcodechip.com Bi-directional read of UPC-A, UPC-E, EAN-8, EAN-13, JAN, and Bookland, with two or five digit supplemental codes, in an 8 pin chip, with NO external parts. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.