Inside old games machines, was: Re: Simulated CP/M-68K?
ethan.dicks at gmail.com
Mon Jun 18 17:42:38 CDT 2007
On 6/18/07, Jim Leonard <trixter at oldskool.org> wrote:
> Martin Scott Goldberg wrote:
> > I, Robot (1983 - the first 3D/Polygonal game) used a 6809 with supporting
> > 2901 bit slice cpu's for graphics support. The color vector Star Wars
> > also used the 6809.
> Surely they didn't use the 6809 for the 3D calculations, did they? I
> know those games have a lot of optimization (fixed-point, no hidden-line
> removal, etc.) but they still seem a bit much for a 6809...
As mentioned further up in this thread, the Atari vector games had, in
effect, a vector math co-processor, the Analogue Vector Generator
(AVG) or "math box" built from 2901s to do the heavy lifting. The
8-bit processor fed shapes to the AVG and sounds to the Pokey and
handled the yoke/joystick I/O.
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