--- Jeremy Ladan wrote: > Unfortunately, the PIC16C745/765 's only allow 8 bytes at a time. I > think tomorrow I'll be deciding between using the 18 series of PICs > or maybe another solution. I suggest looking at another solution, I believe you are making a slight error. The prior system operated off a parallel port correct? The parts are no longer available for that design correct? Be sure to use parts that will be in existance for the life of the product :) The USB EPROM parts uChip sells now may become obsoleted within the next 5 years. I believe this is WAY too short a time for any product you would want to support. Consider something that supports at least USB 2.0 (people won't be cursing your name for something thats low speed USB1.1 slowing down all there USB toys, think of it that way.) One option that's possible is using a USB to parallel port chip and redisgn the internals of the test system to have a longer life cycle. This might function just fine with your existing control software not having a clue it's no longer attached to a parallel port. ===== Stephen R. Phillips was here Please be advised what was said may be absolutely wrong, and hereby this disclaimer follows. I reserve the right to be wrong and admit it in front of the entire world. __________________________________ Celebrate Yahoo!'s 10th Birthday! Yahoo! Netrospective: 100 Moments of the Web http://birthday.yahoo.com/netrospective/ -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist