To keep myself sane lately, I've been working on a fun hobby project. It's an HTML5 game. You pilot a spacecraft, but the only way to control the spacecraft is through a 6502 based computer. So all flight controls have to be coded yourself on the machine. There are hardware modules for radar, engines, weapons, etc, but you need to write software to control them all. I haven't fleshed out all the ideas yet, but I get a strange kick out of the idea of piloting a spacecraft with a Commodore 64.
So far I've got an asm.js, cycle accurate implementation of a 6502, a bus system which is roughly a combination of the C64 and Apple IIe, and 320x200 4 color display. Just started working on the radar hardware subsystem, and was going to try assembling C64 BASIC for it today. Which is why seeing this article on Hacker News was a neat surprise.