http://www.mindprod.com/unmain.html

In schools, the courses may get a tad...strange. You may have a blast reading this bit of fun, even though it doesnt pertain directly to the 6502. If you ever had fun trying to puzzle out some obscue code, take comfort in this eassy that there IS some method to the madness...

but seriously, there are some useful links in the courseware page, so here its from:
http://instruct1.cit.cornell.edu/courses/ee476/

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"My biggest dream in life? Building black plywood Habitrails"