You read that right. Someone finally took the time to sit down and reverse engineer the 6502 for a public talk at a security conference. That's the processor at the heart of the Atari 2600, among other famous devices. In the spirit of getting this year off to a "never too late to be cool" start, Behold Michael Steil's talk from the 27c3 conference in Europe: Reverse Engineering the MOS 6502 CPU.
For more information on the 6502, check out this visual representation of the processor, and read this interesting post from Russ Cox.