Re: VECTREX HERE!

>what results did you get as to watching a 'patchy' screen? do you agree
>that
>the Z (beam-blanking) section of the monitor needs speeding up? i unhooked
>Z
>from the ZOUT on the BZ board and hooked it to +5v, giving me full beam
>intensity, no blanking. You can see that most objects are drawn properly
>(all but the text, which is noticabley rounded), indicating that the beam
>just isn't switching on/off/or a factor of, quickly enough?

Rounded text would probably be a slew-rate problem. Could be the deflection
amps or the yoke, or both. The Vectrex display was driven by an integrator
that was switched to each axis and was updated by software control from the
6809, so it was probably not designed to go particularly "fast". (I'd
suspect the Atari AVG could easily outrun it.)

>could this be a limitation of the circuitry or the tube? my guess is it
>*could* be the tube, but fingers crossed it isn't, i'm looking into the Z
>section of the monitor for inspiration now..

I doubt it'll be the Z section. If you're getting lines that don't "close"
(more than normal for the AVG) it could be a blanking timing issue, but I'd
still be more inclined to think it's the x/y slew rate not keeping up...

-Clay
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Received on Wed Jan 3 19:19:06 2001