Sync problem (rolling picture) using direct_video mode with my CRT Trinitron

Discussion about displays and related hardware including MiSTer filters and video settings.
AmintaMister
Posts: 277
Joined: Thu Sep 16, 2021 10:54 pm
Has thanked: 720 times
Been thanked: 44 times

Sync problem (rolling picture) using direct_video mode with my CRT Trinitron

Unread post by AmintaMister »

Hi all!

Usually I use my MiSTer on my Trinitron consumer TV with analog board output but I've bought this Hdmi -> Vga DAC (https://ultimatemister.com/product/dire ... i-vga-dac/) to try direct video.

So I've set direct_video=1 and composite_sync=1 on my mister.ini, but I've got a vertical rolling picture...

Why?
akeley
Top Contributor
Posts: 1303
Joined: Mon May 25, 2020 7:54 pm
Has thanked: 416 times
Been thanked: 399 times

Re: Sync problem (rolling picture) using direct_video mode with my CRT Trinitron

Unread post by akeley »

Try composite_sync=0. Usually it should be "1" but in some cases "0" works, depending on the cable.

If that doesn't work, try with a clean mister.ini. These two variables are the only ones needed for DV, so maybe you have some old settings that interfere.
FoxbatStargazer
Top Contributor
Posts: 994
Joined: Thu Dec 10, 2020 5:44 pm
Has thanked: 309 times
Been thanked: 228 times

Re: Sync problem (rolling picture) using direct_video mode with my CRT Trinitron

Unread post by FoxbatStargazer »

It's not clear what kind of input you are using on the TV. If you are using a component break-out adapter, the SoG switch you normally use to add the crucial sync-on-green will not apply to direct video. You will need to create a Sync on Green circuit, there are resources on this forum I can't find right now that detail how to do it. Or else get a RGB to Component transcoder. (In theory this is higher quality since ypbpr=1 degrades color bit depth slightly.)
User avatar
rickdangerous
Posts: 265
Joined: Sun May 24, 2020 7:35 pm
Location: Lisbon, Portugal
Has thanked: 31 times
Been thanked: 55 times
Contact:

Re: Sync problem (rolling picture) using direct_video mode with my CRT Trinitron

Unread post by rickdangerous »

AmintaMister wrote: Sun May 01, 2022 10:15 am Hi all!

Usually I use my MiSTer on my Trinitron consumer TV with analog board output but I've bought this Hdmi -> Vga DAC (https://ultimatemister.com/product/dire ... i-vga-dac/) to try direct video.

So I've set direct_video=1 and composite_sync=1 on my mister.ini, but I've got a vertical rolling picture...

Why?
Hello Aminta check PM.

MiSTer and FPGA Gaming European Shop
Classic MiSTer, MultiSystem, JAMMIX iTX and Official Addons.
https://ultimatemister.com powered by RetroShop.pt

Post Reply