I know that you can use a ADC input and a series of resistors in place of jumpers (if you are short on input pins). My questions are * how many "jumpers" can you reliable read with a 10-bit ADC? * can you use arbitrary bit patterns? * suggestions for resistor values? Thanks, Bil -- Psst... Hey, you... Buddy... Want a kitten? straycatblues.petfinder.org -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist