#12 Facility to see / set the frequency on the GUI

[Colm O Flaherty]

An facility on the gui to see / set the external
clock frequency would be good. This would help with
debugging / viewing timing applications (for which
the frequency is probably the first thing that needs
to be verified)

Maybe this could be set up as a stimulus, in which
case, a lot of control would be offered.

[David Barnett]

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The frequency can currently be accessed through
proc_name.frequency when a processor is loaded. Go to the
breadboard, click the processor, and edit the frequency
value on the left. IMO, we still need a less obscure
frequency field in the GUI.

[Robert Pearce]

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The processor frequency is also visible on the "Stopwatch"
window, and can be set via the processor properties on the
"Breadboard" window.

It should be noted, however, that not all simulated timings
are correctly calculated from the processor frequency if
changed during a simulation run. I did look at fixing that
some time back but the fix is incomplete.