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ikorb
What are the Video/Sync/Porch Timings for the WiiDual when outputting 240p?
I want to simulate the WiiDual's 240p video output but I need to know the H/V sync widths and porch lengths.
That partially depends on the video output of the console itself, but in general it should match CEA-861 format 8.
I didn't know it could vary per individual console. I have my Wii displaying on my CRT television over YPbPr. It has a WiiDual installed. My TV is configured so that the Wii's image is centered and sized perfectly to fill the screen.
I also display my computer on the same TV using YPbPr. I am able to customize my computer's video output. I can define the following (all in units of pixels)
H Active Pixels H Front Porch H Sync Width H Total Pixels
V Active Pixels V Front Porch V Sync Width V Total Pixels
The standard defines the Active and Total pixels, but I don't believe it defines Porch widths. The Front and Back Porch widths determine where the active video is positioned in the frame.
If I can match the porch and sync widths of my computer with that of the Wii, then I can switch between them without have to readjust my TV settings to center/size the image.
Sorry, I wrote that in a misleading way. Some details of the video timing generated by GCVideo are determined by the video sent by the console, which in turn is determined by the game running on it.
You are mistaken though, CEA fully defines the video timing of every mode it specifies, including the porch widths. Some modes, like the 240p ones have multiple variants though differing in the total number of lines per frame, which GCVideo just passes through.
My mistake. I am having trouble finding that specification online. Many of them have a letter designation, like CEA-861-D. Should I be looking for one without a letter?
The letter is the revision, higher ones are newer and tend to describe more modes.
Thank you ikorb. I have everything I need now. You’ve been very helpful as always. Thank you for your work. 🙏