RE: Display Corrector

> What I meant was "Why do you need the linearity adjustments that are
> built-in
> on the MH board as well as either your display corrector or the tempest =>
> MH
> board?". Since the MH and Star Wars apparently already have the linearity
> controls, how do you gain anything with the display corrector? Or are the
> amplifone-made cpu boards unable to adjust enough to straighten out the
> lines?
> (not trying to bash you.. i am just curious :) I'm assuming that it just
> won't adjust enough or maybe it doesn't affect enough of the display?
>
Ahhh, I see what you mean. The display corrector needs "raw" signals to
work from to apply the correction factors. (There's a lot of analog
multiplication going on on the board, so small differences in signals make
for big swings output quality.)

The "duplicate" controls are on there simply to give you access to the
adjustments since the ones on the PCB will no longer have any affect because
the "raw" signals are used instead of the ones after the adjustment pots.

I gave the controls on the Display Corrector a bit wider operating range
than "normal" and also made the "correction" factor variable. The original
display corrector design was more general purpose for use with Sega G-80
boardsets (or whatever else) and thus it had a wider adjustment range. As I
slimmed the design down to a more Star Wars specific device I just left the
extra play in there...)

-Clay
Received on Mon Oct 11 18:41:01 1999