240p on HDMI

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msamiullah
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240p on HDMI

Postby msamiullah » Sat Oct 13, 2018 1:02 am

Hi All,

Is there a way to get 240p signal through HDMI ? Currently I dnt have the IO board so was wondering if I can get it through HDMI. My CRT projector has HDMI card and I can get 240p on OSSC through HDMI. Is it possible here ? If yes what setting do I need to use ?

Sorgelig
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Re: 240p on HDMI

Postby Sorgelig » Sat Oct 13, 2018 2:45 pm

You need to find HDMI parameters for 240p and use it in custom HDMI resolution in MiSTer.ini.

msamiullah
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Re: 240p on HDMI

Postby msamiullah » Sat Oct 13, 2018 5:42 pm

Sorgelig wrote:You need to find HDMI parameters for 240p and use it in custom HDMI resolution in MiSTer.ini.


Do you know what are those ?

Sorgelig
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Re: 240p on HDMI

Postby Sorgelig » Sat Oct 13, 2018 11:57 pm

I don't know. 240p should based on NTSC SDTV (480i) resolution if i remember correct.

msamiullah
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Re: 240p on HDMI

Postby msamiullah » Mon Oct 15, 2018 12:58 am

Sorgelig wrote:I don't know. 240p should based on NTSC SDTV (480i) resolution if i remember correct.


so do you mean putting "NTSC SDTV" as video mode ?

hyperterminal
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Re: 240p on HDMI

Postby hyperterminal » Mon Oct 15, 2018 3:10 am

msamiullah wrote:so do you mean putting "NTSC SDTV" as video mode ?

No. You need to edit mister.ini and enter the correct parameters (unknown to me) for 240p.

Look at the example in the mister.ini for 720p: video_mode=1280,110,40,220,720,5,5,20,74250


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