Can you mirror image your display by reversing the connections to the
horizontal deflection winding on the yoke of your monitor?

Bob Ammerman
RAm Systems
(
David Huisman wrote:
> That is exactly how we currently mirror the display, the problem is that it
> mirrors the text also, we want the text normal but display mirrored in one
> of the modes of operation.

How do you manage to get the convergence signals to work correctly
on a reversed deflection? Somewhere you said your video was
RGB so I'm assuming you're using a color monitor.

One can also mirror a display digitally. You just need a
fast A/D, D/A and a bit of RAM. Basically you digitize the video,
and store it into one bank of RAM, while you're reading out the OTHER
bank of RAM in reverse order (xor on the address lines makes this
reverse addressing trivial to do, and lets you use a common counter
chain). This has the advantage of allowing you to use 'standard'
monitors as replacements, and to use big screen TVs etc. without mods.
(Most LCD projectors have a mirroring function).


> Thus, we need to mirror the text before the display,

Could you not use a small front surface mirror in front of the
camera to do this reversal optically? It could also make your
project thinner (depending on how long your camera is). Of course
you may already be using a mirror, which is what caused this problem
in the first place.

Maybe if we had a few more details on what you're trying to do we
could come up with a more optimal solution.