PIC s chippt things

Apologies, I didn't realise the interest would be so sudden, patience is a virtue:-

http://computing.unn.ac.uk/staff/CGWH1/projects/ProjectResources2004.html

John Morton's got a good slant on them:-
http://www.amazon.co.uk/s?ie=UTF8&search-type=ss&index=books-uk&field-author=John%20Morton&page=1