1080i60 on 60Hz titles?

Discuss one of the most feature filled GameCube applications here :)
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andykara2003
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1080i60 on 60Hz titles?

Post by andykara2003 » Tue Jan 19, 2021 5:19 pm

I was amazed to accidentally discover that Swiss can force the vertical resolution of 60hz games to 1080i. I tried it with Super monkey ball and indeed the game looks less pixelated on my NEC XV29+ CRT monitor. I have a couple of questions:

Does this mode impact the performance of the game?

And does it apply to all 60hz games on the system? I read somewhere that the game has to be pre 2003 but can find no confirmation

Is there a list of 60hz games that work with it?
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Extrems
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Re: 1080i60 on 60Hz titles?

Post by Extrems » Tue Jan 19, 2021 8:03 pm

It doesn't really impact the performance, at least not in a way that can be easily determined, as it's using field rendering (hence the 60 FPS requirement).

Hacking field rendering into games tend to come with issues.
andykara2003
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Re: 1080i60 on 60Hz titles?

Post by andykara2003 » Wed Jan 20, 2021 2:30 am

Extrems wrote:
Tue Jan 19, 2021 8:03 pm
It doesn't really impact the performance, at least not in a way that can be easily determined, as it's using field rendering (hence the 60 FPS requirement).

Hacking field rendering into games tend to come with issues.
Thanks, it’s really a great option. It looks like progressive scan on my CRT - I think partly because the resolution is so high the interlacing is invisible. Does it work with all 60hz titles?
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Extrems
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Re: 1080i60 on 60Hz titles?

Post by Extrems » Wed Jan 20, 2021 3:29 am

Not without issues.
andykara2003
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Re: 1080i60 on 60Hz titles?

Post by andykara2003 » Wed Jan 20, 2021 3:53 am

I’ll try them as they come up - Metroid prime next. Thanks for the great work on this stuff :)
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Re: 1080i60 on 60Hz titles?

Post by andykara2003 » Wed Jan 20, 2021 1:10 pm

Extrems wrote:
Wed Jan 20, 2021 3:29 am
Not without issues.
Sorry to bother you again Extrems - is 960i less likely to cause issues?
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Re: 1080i60 on 60Hz titles?

Post by Extrems » Wed Jan 20, 2021 1:38 pm

No, it's equally as broken.
andykara2003
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Re: 1080i60 on 60Hz titles?

Post by andykara2003 » Thu Jan 21, 2021 1:12 pm

Cheers, Ok I’ll do some testing :)
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Re: 1080i60 on 60Hz titles?

Post by andykara2003 » Thu Jan 21, 2021 5:30 pm

Extrems wrote:
Wed Jan 20, 2021 1:38 pm
No, it's equally as broken.
I can’t find any info on 1080i. I don’t suppose you know of anywhere that someone’s documented compatability etc?
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Re: 1080i60 on 60Hz titles?

Post by Papy.G » Fri Jan 22, 2021 4:03 pm

GC forever wiki is a Wiki, feel free to add a column or just a comment in the comments field in the GC's compatibility list. ;)

@Extrems:

This question falls in an really appropriate timing, as I had some complementary questions to ask on the topic:

Are those modes still reserved to the Nintendo original component cable and high end CRTs, or can it be used with a GCVideo analog cable too, now with the FW V3, or even more with the HDMI ones also? I have a V2.4 HDMI Plug that I can't update and I tried one of those higher resolutions (think it was 960i or 1152i), with no luck, but don't know if it was only because the hack didn't perform well on the specific game, or the GCPlug's FW, or the TV wasn't supporting it or all at once…
Talking about 1080i makes me think i have seen in a TV manual that there is a 1080p@24 or 25Hz for frame perfect cinema displaying (i don't have this specific set anymore), is it really a widespread format you knew of? And would it be possible to output that on a GC? (As scan rate wise, it should do, while it is not straight maths…) Or should we expect the same issues with speed as with separate fields modes? (added to the compatibility issues already seen with 960i/1080i)

You often told about games' internal resolution as if it was the maximum real resolution you can't get past, field rendering is a way to get rid of that, if i understand well? So 720 px wide on 480i/p modes is just an upscale?

Also, on the lower side of the video modes, I have seen that some games, as F-Zero GX, seem frame-synchronized and runs half the speed when in separate field modes. Is there a way to fool the game into thinking there has been a frame between each displayed one (or letting the game generate a "dumb" frame for every useful one)? I don't know if those modes are currently useful and much used by anyone, so it may not be worth the effort to investigate into it anyways. It's more of a question out of curiosity, you can keep the sf modes as-is, as long as you keep them available, at least.
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Re: 1080i60 on 60Hz titles?

Post by andykara2003 » Mon Jan 25, 2021 11:41 pm

Papy.G wrote:
Fri Jan 22, 2021 4:03 pm
@Extrems:

This question falls in an really appropriate timing, as I had some complementary questions to ask on the topic:

Are those modes still reserved to the Nintendo original component cable and high end CRTs, or can it be used with a GCVideo analog cable too, now with the FW V3, or even more with the HDMI ones also?
I tried this with gcvideo on analogue and it makes a slight difference on monkey ball, but the output looks progressive scan. I assumed that was my monitor? I have the component cable as well - I’ll give that a go & compare with analogue GCvideo via RGB
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