::I've spent a bunch of time searching but haven't found much that's ::enlightening. As you would like it to be in assembler, have a look at the code from 4=20 Square books or is that Square4 books. Nope got up off my chair Square1=20 books www.sq-1.com. You can download the book code, but it won't be=20 commented in a normal fashion and is deliberately obfuscated to entice you= =20 to purchase the books to go with the code. The code is complete, just refers to purple-prune and include brown-sauce=20 files. Colin -- cdb, colin@btech-online.co.uk on 9/09/2011 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 This email is to be considered private if addressed to a named individual= =20 or HR department, and public if addressed to a blog, forum or news=20 article. =20 =20 =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .