-----Original Message-----
From: Erik Mooney <emooney@xxxxxxxxxxxxxxxx>
To: stella@xxxxxxxxxxx <stella@xxxxxxxxxxx>
Date: Wednesday, January 21, 1998 10:46 AM
Subject: Re: [stella] Screen shots
>Good, good. You buffer the pixels before doubling them?
Yes, but only for modex.
>Do you use
>every other byte in the buffer, or do you just store the (160 per line)
>pixels sequentially, using only 32k of the buffer?
Sequentially. This way the whole buffer will fit within one segment, even
if we're doing 360 by 240.
>> >Call my file modex.asm . Also, can I put a procedure
>> >ModeXInit in my file, and just have you call that to init mode-x?
I've added some variables that you can set with ModeXInit to tell the
emulator about the screen dimensions of the current video mode. _VideoWidth,
_VideoHeight, and _VideoPixels. If you set _VideoWidth to 180 (for 360 by
240) the emulator will put out some extra blank pixels on every line to fill
it out. Otherwise it will do the normal 160. _VideoHeight sets the max #
of lines the emulator will generate. _VideoPixels is the total number of
pixels to convert. When the emulator runs out of lines to generate, it
fills the rest of the buffer out to _VideoPixels with blank pixels. This
way, all you have to do is convert the buffer (as fast as you can).
>Going into mode-x preserves the current
>palette, so you can set mode 13, set the palette, then (if modeX then call
>modexinit.)
Done. You can find the files (0.89a) under "Developer Releases" at the
bottom of:
http://www.whimsey.com/z26archive.html
Have a nice weekend!!
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