Debug overlay

[Andrew Davie]

Finally, some on-screen diagnostics. Debugging to date has been complete guesswork and colour flashes; this will make a huge difference. I should also get the symbols included in the gcc build so Gopher can display them. That will make a huge difference. But for now... we have numbers!

[Andrew Davie]

Of course the size of the diagnostics varies with the mode...

[Andrew Davie]

ICC1