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320/304px overscan on CRT TVs?
Posted: Wed Jul 14, 2021 2:47 pm
by akeley
On my CRT TV some games are displayed with horizontal overscan. I believe that's what the 320/304 toggle in the OSD is for, but it does nothing for me - I'm using Direct Video. I suppose it's the same problem as described in this github issue:
https://github.com/MiSTer-devel/NeoGeo_ ... issues/100
I was wondering if any other CRT user managed to slove this, perhaps using modelines and some other video-related settings? It's not really a big deal during gameplay, but for the sake of perfectionism it'd be nice to be able to correct this.
Re: 320/304px overscan on CRT TVs?
Posted: Wed Jul 14, 2021 3:12 pm
by FoxbatStargazer
The 320/304 switch does not change the position of anything on analog output. It's more there for the sake of the scalar if you are using 4:3 or narrower resolutions.
In the meantime yes, you might be able to fix this using the scaler (i.e. direct video off, 1920x244 resolution, full aspect ratio, HV integer scale)
Re: 320/304px overscan on CRT TVs?
Posted: Wed Jul 14, 2021 3:20 pm
by akeley
Ok, so do I need a specific modeline?
Re: 320/304px overscan on CRT TVs?
Posted: Sun Sep 05, 2021 9:36 pm
by bilippe
Hi,
Github problem 100 is me!
Yes, you need a Modeline and I'm in the process of creating one ...
Can you test it out if you want?
Re: 320/304px overscan on CRT TVs?
Posted: Mon Sep 06, 2021 9:00 am
by akeley
It's a one year anniversary since your report...oh well
Sure, if you have some modelines I could try out it'd be great.
Re: 320/304px overscan on CRT TVs?
Posted: Mon Sep 06, 2021 7:45 pm
by bilippe
Try it please
Re: 320/304px overscan on CRT TVs?
Posted: Mon Sep 06, 2021 7:46 pm
by bilippe
@akeley give me a return please
Re: 320/304px overscan on CRT TVs?
Posted: Mon Sep 06, 2021 9:56 pm
by akeley
With direct video off, my image is out of sync. I'll try again tomorrow connecting via UMSA converter when I have some time, it's a bit more tolerant than the VGA cable I'm using now.
EDIT: ok, I got a stable image with your config, but there is no difference regarding overscan - some detail is still missing lef/right. Also, the image is shifted about 1 cm up vertically.