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Re: FrameThrower vs CAD Buffer II for XL1200 color graphics?
Date: Thu, 15 Nov 90 09:45:05 -0500
Date: Wed, 14 Nov 90 11:06 PST
Just by having a 1200 things get faster by a factor of 3, so any overhead-dominated
operations (such as drawing zillions of small things) get faster by 3.
It may be that in general an XL1200 is 3 times an XL400. But, it has
been our observation that drawing lines on a color XL400 in genera 8.0
is twice as SLOW as drawing in color on a 3640. So the performance
advantage may only be about 1.5.
I suspect you are referring to the "CAD-buffer equivalent" hardware on
the XL400. If so, you are comparing the performance of Symbolics' color
hardware on the 3640 with that of third-party VME-bus color hardware
marketed for (but not designed for) the XL400. I doubt such a comparison
is relevant to the performance of a framethrower or other XL1200 system.