Posted By
MIK
on 2021-12-08
04:16:31
 |  Re: Weird screen artefacts
Yeah just like a real C64 there are some odd interference lines going down the screen on C16/Plus4 at the edge of each character with some lighter screen colours like Grey or Blue making it look even worse. And yep they show up the worst with S-Video or BNC. Composite Video tends to be a little better with the lines but you get pixel colour bleeding with some colours which is nasty to look at so we try to avoid using it.
RF is the only one where these lines all but disappear on both C64 and C16/Plus4 as it has an overall darker picture, or a loss of quality because the sound is on the same cable. Sound is also louder on RF and it also adds more bass to the tone.
Setting up a screen so the picture looks it's best on a real C16/Plus4...
Contrast and colour are easy to fine tune to your taste but what I do is use the Novaload turbo loader to set the brightness.
The main screen colour of Novaload is like a dark charcoal grey, if you see black your screen is too dark so up the brightness until you can just about see that it is a dark charcoal grey. Get this right and those screen lines won't look as bad with the majority of colours. Just make sure black looks black and the Novaload screen with text on it is a dark charcoal grey.
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