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View topic - Grafik errors SMS-II normal?

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  • Joined: 26 Jan 2020
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Grafik errors SMS-II normal?
Post Posted: Fri Feb 21, 2020 12:03 pm
Hello,

i have a dumb question. I have two SMS2 and both have in particular games for example Sonic 2 the same grafik errors:

I made a video. It's 50Hz; @ 60Hz it's only slightly visible because it's near the edge of the visible screen of the TV.

RGB & RCA

On RF it's also visible but you may oversee it because of the bad quality.

There are only some games with this error so far. It's on different spots for each game.

Thanks for your help.

Regards Alex
RGB.mp4 (3.84 MB)
RGB
RCA.mp4 (4.12 MB)
RCA

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Post Posted: Fri Feb 21, 2020 1:32 pm
That is very common, it is the game refreshing its palette data on every frame which causes some pixels to show in the "inactive" area. Some games will time this to happen in the part you can't see (deliberately or otherwise), some games have static palettes and thus no continuous writing.
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Post Posted: Fri Feb 21, 2020 1:55 pm
Thank you Maxim, can't remember that behavior when i was a kid. But at this time nobody cares about rgb so i think i didn't see it 😃. Now with rgb it's clear and crisp so that's the other side of the medal. Regards Alex
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Post Posted: Fri Feb 21, 2020 2:31 pm
I remember seeing it very well on RF on a 14” TV. For example in Lemmings it’s very clear (as with many games with black borders), and in Cool Spot there’s a palette change for the status bar which causes flickering pixels one line higher, right in the middle of the screen.
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Post Posted: Fri Feb 21, 2020 2:54 pm
I also tested some Brazil games like earthworm jim or battletoads. There're also a lot of such pixel errors. Really bad. I only want to know if something is bad with my sms. Thank you for the explanation as well.
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