Re: [stella] Games using unofficial opcodes

Subject: Re: [stella] Games using unofficial opcodes
From: Gene Johannsen <aofl@xxxxxxxxx>
Date: Wed, 1 Jun 2005 13:20:53 -0400
I recall reading an article in Compute! magazine back in the day written by
somewho experimented with non-std op-codes to determine what they did.  Not
sure when, who, or what the author might have used as a reference.

Gene

--- Glenn Saunders <mos6507@xxxxxxxxx> wrote:

> I'd be interested in knowing how early the use of
> illegal opcodes started and for which platforms.  I
> vaguely recall that the practice may have originated
> in the C=64 'scene'.
> 
> I'm actually surprised that Activision or Imagic never
> used them.  They might not have known about them.
> 
> We can use them because we know that (in retrospect)
> all 2600 systems out there handle them the same way. 
> But back then if they were aware of them, maybe they
> thought that not all 2600 systems would work right
> (like the various system changers).
> 
> 
> 
> 		
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