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Reged: 09/21/03
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Re: Star Trek arcade by Sega (Video)
07/31/15 08:25 AM
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> > On Asteroids, the shots from the UFO and your ship glow brighter than everything
> > else. This was done by re-drawing the shots on top of themselves. Then it just sort
> > of happens, because vector monitors. Star Wars used the same trick for explosions.
> I
> > think they called it 'overdrive', which just makes it cooler.
>
> Nah it's not a vector monitor thing, just a CRT thing. If you drive a point too hard,
> electrons will excite the surrounding phosphor in addition to the point you're
> targeting. Overdrive is the correct terminology, you drive the monitor harder than
> the maximum that would deliver a sharp image.
I meant compared to a conventional raster display. In my admittedly very limited understanding, a vector monitor draws only dots and the game, or vector generator or whatever, has direct control of the beam or the guns at all times.
I remember reading about a "spotkiller" circuit which does something to the beam so that it doesn't burn a hole in the phosphor? I used to own an Asteroids upright and you could see it in action as you turned the game off and the beam would sort of zinnggg onto the center of the screen, concentrated and bright like the shots and then disappear. I always imagined that that was the "spotkiller".
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