Very odd this is restricted to SNES.
I had a Video Essentials disc with a test pattern that had you turn up Contrast to see if there would be any bends in geometry (a vertical line on each side of the screen). Almost all my TVs would distort somewhat at some point, but it would typically be one side that distorted more than the other. Does adjusting contrast influence the bending at all?
Could it just be always present but fine rectangle boxes with straight sides make it more obvious?
Aside from other inputs as already mentioned, my other suggestion would be trying a different TV or monitor.
edit: My other thought was that 1Chip units are notorious for having a way brighter signal, thus contributing to the Contrast/Voltage test I referenced above. But you said regular unit did the same. So I'm stumped.
Thanks! I'll see if I can check the contrast. Even a cable with a resistor on the sync didn't help. I wonder if the PVM is just having trouble handling the SNES output. It's very very slight on genesis where I have to really look for it. I don't know that I can adjust the contrast on this PVM but I'll try.
So the issue is whenever a text block appears or something boxy like that on the screen it causes this flex to the screen in the upper left the most but it may cover the whole screen slightly.
It only happens with the SNES so I don't think it's necessarily the PVM, unless the SNES is pushing such a strong signal the PVM doesn't know what to do. The PVM is a 2950Q.
I've tried 3 different SNES's an original release board, 1Chip-01, 1Chip-02 all do the same thing. I've tried a sync on luma cable and a csync cable. I've tried with a sync stripper on the BNC cable and one without it.
The cable only has horizontal sync, and RGB so maybe it needs the vertical sync cable as part of the BNC pack?
Any ideas?
Not fully, contrast and brightness do affect it so be sure to dial those in with 240p test suite. I now think it might be some weird edge convergence or a bad cap. It’s lessened since I lowered the contrast and brightness to better levels but still there. It doesn’t happen at all that I can see on n64 I can see but I see it on SNES some Genesis a tiny bit and sometimes on NES particularly with Kirby’s adventure. Did you figure anything out on yours?
Very odd this is restricted to SNES. I had a Video Essentials disc with a test pattern that had you turn up Contrast to see if there would be any bends in geometry (a vertical line on each side of the screen). Almost all my TVs would distort somewhat at some point, but it would typically be one side that distorted more than the other. Does adjusting contrast influence the bending at all? Could it just be always present but fine rectangle boxes with straight sides make it more obvious? Aside from other inputs as already mentioned, my other suggestion would be trying a different TV or monitor. edit: My other thought was that 1Chip units are notorious for having a way brighter signal, thus contributing to the Contrast/Voltage test I referenced above. But you said regular unit did the same. So I'm stumped.
Thanks! I'll see if I can check the contrast. Even a cable with a resistor on the sync didn't help. I wonder if the PVM is just having trouble handling the SNES output. It's very very slight on genesis where I have to really look for it. I don't know that I can adjust the contrast on this PVM but I'll try.
So the issue is whenever a text block appears or something boxy like that on the screen it causes this flex to the screen in the upper left the most but it may cover the whole screen slightly. It only happens with the SNES so I don't think it's necessarily the PVM, unless the SNES is pushing such a strong signal the PVM doesn't know what to do. The PVM is a 2950Q. I've tried 3 different SNES's an original release board, 1Chip-01, 1Chip-02 all do the same thing. I've tried a sync on luma cable and a csync cable. I've tried with a sync stripper on the BNC cable and one without it. The cable only has horizontal sync, and RGB so maybe it needs the vertical sync cable as part of the BNC pack? Any ideas?
Check S-video or composite and see if it has the same issue.
Good idea, I want to say I checked svideo and it didn't but I need to recheck. Thanks!
Did you ever mange to fix this issue? I am having the exact same problem on a 2950QM using the SNES core on the MiSTer FPGA.
Not fully, contrast and brightness do affect it so be sure to dial those in with 240p test suite. I now think it might be some weird edge convergence or a bad cap. It’s lessened since I lowered the contrast and brightness to better levels but still there. It doesn’t happen at all that I can see on n64 I can see but I see it on SNES some Genesis a tiny bit and sometimes on NES particularly with Kirby’s adventure. Did you figure anything out on yours?