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MiSTer-devel / Arcade-Cave_MiSTer

MiSTer arcade core for Cave 68K arcade classics.
GNU General Public License v3.0
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Graphical issue in scrolling (DoDonPachi/Esp Ra.De/Guwange) #76

Closed Botvinnik92 closed 2 years ago

Botvinnik92 commented 2 years ago

Greetings, I have noticed a problem in the latest beta core (Cave_20220512), which creates a diagonal line from the upper-left corner of the screen. I have noticed this issue in DoDonPachi (https://youtube.com/shorts/oPjB51r-Ues), Esp Ra.De (https://youtube.com/shorts/IuFgMimjrZI) and Guwange (https://youtube.com/shorts/m_VE-N0zr0Q), but was unable to reproduce it in Dangun Feveron. The attached picture shows the booting screen in Guwange, where it is clearly noticeable: IMG_20220512_221604_1

I have noticed this problem while using the HDMI output, and only when I used the vertical output mode (when selecting the horizontal mode, the glitch dissapeared immediately). The only 'unusual' feature in my settings is the 'vsync_adjust = 2' option in my MiSTer.ini, so the core was running at 57Hz even in my LCD monitor (FreeSync). I didn't notice this issue in previous beta versions, and it only happens from time to time. If there's any other information I can provide which can be useful, please let me know.

Best regards.

nullobject commented 2 years ago

Thanks @Botvinnik92.

This is because vsync_adjust=2 sets the frame buffer in "low latency" mode. Without double buffering you will see screen tearing artifacts with the Cave core.

Try using a different vsync_adjust value:

You can set a vsync_adjust value just for the Cave core, even if you want to still use low latency mode for everything else:

[cave]
vsync_adjust=1

Hope this helps, let me know.

Botvinnik92 commented 2 years ago

Thanks @nullobject, really appreciate it. As you said, after enabling vsync_adjust = 1, I haven't noticed any issues, while maintaing the smooth scrolling. So, I guess this was a false alarm, with your permission I will close this issue.

Thanks again for your attention, and congrats for this gorgeous core.

nullobject commented 2 years ago

@Botvinnik92 No worries, I'm glad that it is running properly now :+1: