Re: Vector resolution

Clay Cowgill wrote:

> Yeah, "resolution" is a tricky term for those.
>
> For Battlezone and on the Atari stuff was more-or-less analog in nature. On
> a monochrome monitor (no shadow mask or aperature grill) you wouldn't be far
> off to say the resolution is "infinite". ;-)
>
> Positional accuracy is something else, but also not "black and white" so to
> speak. (Har-har. Punny!) Atari AVG's have positional accuracy of
> 1024x1024, but depending on scaling a lot of that can be off the actual
> screen when it's drawn. (That's how they can easily "scroll" things like
> the mountains in BZ-- it also saves them CPU time in games like Star Wars
> since they don't do any real clipping to the display.)

That is where the scaling DAC DAC08 comes in, by increasing or decreasing it's
analog output voltage (the reference for the X and X DAC's), thereby 'zooming'
into, or out of the 1024 x 1024 grid.

Although the AM6012 12 offer bits resolution, the most- and least significant
bits are not used, and thus leaving 10 bits, making 1024 possible combinations.

Cya !
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Received on Fri Oct 20 13:50:49 2000