It's always nice to see just how far people have taken the C64's extremely limited hardware; one thing that's surprising to many is that the floppy drive contains a CPU identical to the one in the main unit.<p>The rest of his site is very interesting too - I think some of his other articles have made it onto HN before. I like that he has a series of articles on obfuscated programming:<p><a href="http://www.linusakesson.net/programming/obfuscation.php" rel="nofollow">http://www.linusakesson.net/programming/obfuscation.php</a><p>...and below that, another series titled "sane programming":<p><a href="http://www.linusakesson.net/programming/index.php" rel="nofollow">http://www.linusakesson.net/programming/index.php</a><p>His demos are worth watching too.