VDP 1.04 RC2 compatibility issues

The new VDP release candidate, namely VDP 1.04RC2, changes how the Agon Light resolutions work. This means the screen dimensions no longer behave as they did previously for the terminal mode used by Vezza.

As a workaround for now, you can enter:

vdu 23 0 193 1 22 1

from the MOS * prompt to select the legacy resolution, and then run VezzaVT as normal.

I'm investigating which of the new, rich set of updates can be used and how to best take advantage of them. Once the VDP code settles I will release an update.