Re: VECTREX

> So, basically this means that only the beam on/off signal is corrupted here,
> since the even characters are all on the same scanning (rasterized) lines.

That is correct. And yes, I think the shift register is in the 6522. If Z
comes from the same sample and hold circuit as the XY signals, is it possible
that it just isn't holding properly? Suppose (and this is totally unfounded
wild speculation) that the text display code refreshes the Z value every
other character (it's a tight loop after all) and for some reason it works
for a second or so on power up :-) Like I said, wild guess. Focus on every
component that affects the Z signal - this includes any caps in the S/H.
And do tell when you figure it out.

BTW, the method allows easy scaling of text, you just put a larger value
into the X integrator to make the beam scan farther in the same time.
Unfortunately you really need more scan lines to increase vertically.

-- 
 ___   __   _   _  _
|   \ /  \ | | | || |       phkahler@oakland.edu     Engineer/Programmer
|  _/| || || |_| || |__     " What makes someone care so much?
|_|  |_||_| \___/ |____)      for things another man can just ignore. " -S.H.
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