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Mac OS 9 on Unsupported Hardware / Re: Mac Mini G4 + display oddities
« Last post by aBc on Yesterday at 12:12:26 AM »Of possible relevance here … per darthnVader.
Mac Mini G4 pixel clock limited to 135Mhz / April 1, 2018
https://macos9lives.com/smforum/index.php?topic=4337.msg30099#msg30099
Mac Mini G4 pixel clock limited to 135Mhz / April 1, 2018
https://macos9lives.com/smforum/index.php?topic=4337.msg30099#msg30099
Quote
Display Support: Single Display Resolution Support: 1920x1200
Details: The DVI video output supports digital resolutions up to 1920x1200. Apple also reports that it supports the "20-inch Apple Cinema display and 23-inch Apple Cinema HD display; supports coherent digital displays up to 154MHz; supports non-coherent digital displays up to 135MHz." VGA output (using the provided adapter) supports analog resolutions as high as 1920x1080. S-Video and composite video (to connect to a projector or TV) requires the Apple DVI to Video adapter (sold separately).
Coherent vs non-coherent is some obscure thing to do with the TMDS transmitter( on the GPU ) and the TMDS receiver in the display. The 9200 either has an issue with a weak TMDS signal with non-coherent receivers( Displays ). Or Apple crippled it, tho I doubt that.
The trouble is, no manufacturer really list that in the specs, and I doubt you'd get anyone in tech support to know what you were talking about if you did call them.
So it's really a crap shoot as to what brand and make of display will work correctly at the native res of the LCD/LED. My 1080p HDTV works fine with the Mini @720p, as the pixel clock is not over 135Mhz at that resolution.