Thu Oct 6 16:39:40 EDT 2011

Console working with app that uses interrupts.

Test case: synth.
Seems like there are a couple of routes:

- Just use the console to setup some stuff and call `main'.  This
  works fine, but console is dead of course.

- Make come kind of CTRL-C command to stop the app.

- Run the console from interrupt, at least the byte-input part.  This
  might be a bit of work.

- Use the ICSP debugger stuff[1].

[1] entry://../electronics/20110320-225422