VECTORLIST - The Mailing List For The Technical Discussion of Vector-Based Arcade Games

May_1998
Re: MC1495's


From: Paul Kahler ( )
Date: Thu May 14 1998 - 20:20:44 CDT


CLay Wrote:
> As for what it does...
>
> What the multipliers are doing is basically squaring the y-input and
> multiplying against a constant to scale the result. That value is then
> multiplied against the x-input (which can be positive or negative) which
> results in a sort of inverse linear function-- values close to "center"
> on the Y axis make the X-axis stretch out, values closer to the limits
> of the Y axis result in the X axis having very little expansion.

So technically you don't need any 4 quadrant multipliers. You need a
squaring circuit (do they make such things?) and a 2 quadrant multiplier
since Y squared is never negative.

--
 ___   __   _   _  _
|   \ /  \ | | | || |             Engineer/Programmer
|  _/| || || |_| || |__     " What makes someone care so much?
|_|  |_||_| \___/ |____)      for things another man can just ignore. " -S.H.


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