> The simulator says that the data pins are giving the values I expect > (my original table was data from the simulator), but if it matters here > are my code snippets: Looks OK (sorry, I said LSN before MSN). How about RS ? It would be 0 during initialisation and 1 to write the "W" to the screen -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist