Here's a nice piece of ancient history - some of Ultima 5's C64 tile drawing code! Dr. Cat was the guy doing the Apple to C64 port and a note by Dallas Snell was written telling him to use the tile drawing code that Chris Roberts had written. If Cat had any questions about it then just ask Richard Garriott!
Any C64 coder can see that we're drawing tiles in mixed mode here, thanks to the sickening "colrmem EQUAL $D800" directive! I hated that graphics mode almost as much as Apple II double-res.
I'll rescan it when I find it again so it doesn't look so ass.
ultimatilecodedallas snellchris robertsc64dr. cat