Re: [hatari-devel] Another SYNC demo, another one not emulated ... :)

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 13/07/2023 à 11:35, Troed Sångberg a écrit :
> (but this time it's not something I've found - we're just making use of 
> czietz' discovery of desyncing GLUE and Shifter videomodes)
>
> https://demozoo.org/productions/325847/ 
> <https://demozoo.org/productions/325847/>
>
> It's using the GLUE-color/Shifter-mono option which is compatible with 
> both ST and STE. With scanlines 512 cycles long the Shifter manages to 
> output 1280 pixels per line, giving rise to the interesting resolution 
> of 1280x200 pixels.
>
> (Each line still 160 bytes, as usual in color modes)
>
> This is "easy" to use on real hw, if you have one of the ubeswitch 
> (STVGA) adapters where you can toggle between color or mono pin being 
> output to the screen.
>
> The whole trick relies on the Shifter not knowing anything about 
> UDS/LDS, and thus it's possible to set one videomode in GLUE/Shifter 
> with a regular ffff8260 call, followed by one setting the videomode in 
> Shifter only by another call to ffff8261.
>
> czietz original post: https://www.atari-forum.com/viewtopic.php?t=34108 
> <https://www.atari-forum.com/viewtopic.php?t=34108>
>
> (The opposite trick, GLUE in high res and Shifter in color, only works 
> on ST since on STE it will give rise to BLANK being constantly on)
>
> regards,
> Troed

Hi

I saw the video from Sommerhack on the twitch stream, thanks for using 
these new kind of hardware trickery, because :
 - it gives some real case of using it, which is always good to 
"validate" the proof of concept
 - it gives a reproducible example of using it, thus motivating me to 
add a proper (or close to :) ) emulation for it.

so, let's see, I will give it a look to check how it can integrates with 
Hatari's choice of screen/resolution without breaking too much things

Nicolas