Neo Geo Picture is shifted

[tianfeng33]

Just installed this in my mv1c and it appears that the picture is shift to the left and not centered on a 16:9 screen.

[marqs85]

I wonder if there are some differences among MV1C boards. I'm using these parameters which produced a centered picture for me. How much off is that in your case and is it consistent among different output modes?

[tianfeng33]

This was the output on my tv.

[tianfeng33]

I can put an AV board in this tonight and take a look at what this console would need from the OSSC.

[marqs85]

Could you take a screenshot of test grid etc. where it is easier to see how much off it is horizontally? Or did you mean full 320px Neogeo width is sampled correctly but that is not centered on 16:9 output as the picture indicates?

[tianfeng33]

yeah, it is sampled correctly but the picture is shifted over to the left.

[marqs85]

Ok, I'll take a look into this.

[tianfeng33]

anything you need me to test I am down. It is obviously not the end of the world. no information is being lost.

[marqs85]

I wasn't able to reproduce the shift on my monitor, the only minor issue is last column of pixels getting blanked. Do you have the shift with just the pictured monitor? Non-standard refresh rate of MVS might cause issues with certain displays but I wouldn't expect to see shift even in these cases.

[kimbapslice]

I am experiencing the same issue with the right side of the grid being cut off in all resolutions via hdmi to a 4k lg hd tv. Running this on an OMVS playing Samurai Shodown 2 mvs. Also as mentioned by tianfeng33, the screen is not centered.

[marqs85]

Are you able to test with another TV just to rule out the centering issue does not only occur with LG sets?

[kimbapslice]

I will check with other tv's and report back.

[kimbapslice]

I tested with a 1080p native Samsung tv today and a 720p native Sylvania, and both in all resolution modes had the right side missing a few pixels just like the screens above with the grid (top and bottom were full grid patterns depending on the res but normal). The centering issue was much less pronounce (if at all) on these 2 tv's. Digital kit was actually installed by Avram-CE (not throwing him under the bus :) What I mean is everything is pretty standard. Honestly, everything else is working fine.

[marqs85]

The centering issue seems to specific to LG - perhaps they don't play nice with 59.19Hz refresh rate? Missing of the last column apparently is a feature of MV-1C and other late models, and there is even a warning about that on 240p suite grid test. I just tested analog output and last column was missing as well.

[kimbapslice]

That's great! Thank you!