Emulator introspection with FUSE

This evening's hack was to write a FUSE filesystem in my NES emulator. I've made it export a virtual filesystem that gives you files for the various RAM and ROM areas of the machine, and you can read and write to them. This could be useful for debugging my homebrew stuff. You can also point a hex editor at the 6502's RAM and edit bytes to cheat, dd /dev/urandom into video ram to glitch the display, etc. Surely peering inside applications through the filesystem is an extension of the Unix way. Here's what you get:

hefner@lightworks:~$ ls -l /tmp/nesfs
total 0
-rw-rw-rw- 1 root root   8192 Dec 31  1969 chr-rom
-rw-rw-rw- 1 root root    256 Dec 31  1969 oam
-rw-rw-rw- 1 root root  32768 Dec 31  1969 prg-rom
-rw-rw-rw- 1 root root   2048 Dec 31  1969 ram
-r--r--r-- 1 root root     22 Dec 31  1969 rom-filename
-r--r--r-- 1 root root     15 Dec 31  1969 rom-hash
-rw-rw-rw- 1 root root   8192 Dec 31  1969 sram
-rw-rw-rw- 1 root root  16384 Dec 31  1969 vram

I suppose I could fix the other fields in the stat structure. This is the first time I've done an ls -l here to notice. The FUSE examples I started from didn't bother. :)

This will appear in the next version of my NES emulator, although I can't say when that will be. Until I feel like spending an unpleasant hour or several learning to do merging with Git, probably.