With the 18F series a 'mirror' byte may not be needed as all ports have a LATCH register, which should mitigate the R-W-M problem. Colin -- cdb, cdb@barnard.name on Friday,12 November,2004 I have always been a few Dendrites short of an Axon and believe me it shows. Light travels faster than sound. That's why some people appear bright until they speak! _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist