RE: [stella] Stella 2.0 Alpha 2 available

Subject: RE: [stella] Stella 2.0 Alpha 2 available
From: "Fred Quimby" <c9r@xxxxxxxxxxx>
Date: Tue, 28 Jun 2005 01:07:13 -0400
If a single click replicated the effects, maybe my original hack isn't 
running the code as often as I thought.  I thought it ran 60 times a second, 
but this could be wrong.  In my version, I actually put the code in TIA.cxx 
and took over an unused bit in a TIA register to check if we are to fry or 
not, which is probably a bad way to do it, but it worked for trying 
different ideas to see how they worked.  I also had code in the 6502 core (I 
made my own function there) but this ended up being commented out since it 
was more likely to crash the system than do anything useful :)

I was working on finding a better place for the code when I mucked up the 
code and got busy and had to put it aside.  So it's good that you've got the 
code now because it probably makes the most sense being in the debugger 
anyway than wherever I might have put it.

To set the frying flag, I hijacked the fire button event on the driving 
controller (which also would have needed changing!)  So the frequency at 
which the code runs could have been connected to the event handler instead 
of the frame rate.  If a single click or a few clicks are enough to 
duplicate some documented results, there's no reason to fix it if it ain't 

>On Mon, 27 Jun 2005, Fred Quimby wrote:
> > Just as a sanity check, I ran SI and fried it in my special version of
> > Stella 1.4.2 until I got the double shots.  It took a few times to get 
> > double shots, and the time it worked, I held the "frying" button down 
> > about 0.25 seconds, so perhaps the code I posted ran 15 times.  If 
> > maybe the "frying" button in 2.0 Alpha could run the code a random 
>number of
> > times too, like 1-15 or so per click to help replicate it better.  Well, 
> > can all try it out in the next alpha and see how well it works.
>I added your code to Stella 2.0 Alpha, but made it run once per keypress
>instead of continually. I was able to duplicate the Invaders double shots
>and the H.E.R.O. infinite lives effect. Code checked into CVS and will
>be in the next alpha release.
>Out of curiosity: where did you put your code in 1.4.2? How often did
>it run? Once per frame, or...?
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