[stella] stella emulator status

[bob.montgomery at thomson.com]

Hi Thomas,

>I didn't find those in the documentation. Where are they described?

In the debugger doc, look under the heading, "Global Buttons."

>You can also use the Step, Trace, Frame+1 and Scan+1 buttons 
>from anywhere in the GUI via the keyboard, with Alt-S, Alt-T, 
>Alt-F and Alt-L.

-Bob