pinouts.ru Contains info about pinouts for many, many, many different devices, old and new. Seems to be scant on implementation information, though (for example, no word on the site about whether the voltages at the serial connector on a particular PDA are logic level or RS-232 bipolar)(thanks John, for that info!) Also a mechanism for adding to the list. Mike H. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist