Re: [stella] NUSIZ

Subject: Re: [stella] NUSIZ
From: Mark De Smet <de-smet@xxxxxxxxxxxxxxx>
Date: Thu, 21 Sep 2000 20:53:47 -0500 (CDT)
> Pity, it would be nice to multiply larger players. How about RSYNC to
> multiply a player? Does someone tested this? I currently only have the
> ability to write stuff under an emulator :o(

Sorry for being slow, but it looks like no one answered this.

I don't think it will work.  You may be able to find some really wierd
specific case where you can get it to work, but I doubt that it'll be
useful.  If you simply hit it whenever you want to duplicate, you will
screw up the screen.

I can however imagine a situation that has some promise.  I have note
completely worked it out, but you may look into using it like this:
-Hit it when you want to start drawing a line.
-*immediatly* after that strobe RESxx (whichever desired)
-then when you get to where you want to draw the object, hit it again.
-repeat this as desired.
-then you must hit it again exactly after one line lenght.
  *** You can no longer use WSYNC!!!!

Unless you figure out where in horizontal blank the horizontal counter is
zero, you would probably have to do this for every line, including the off
screen ones.

I am skeptical that this would work.  I believe that the hardware forces
the output to be black for the blank time after the horizontal counter
gets to zero, this could cause that blank to happen in the middle of the
line.  However, you could check by doing some test programs.  If you can't
get your code to run on a real vcs, you probably can't test this because
you would need to do many trials, and they would only show anything on a
real tv.  I tested some stuff with rsync to try to force the vcs into
interlace mode(the normal tv scan type) to get higher vertical resolution,
but was unsuccessful.  I would loose the image because of what I was


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