it's a non-standard thing: https://en.wikipedia.org/wiki/HDMI#Legacy_compatibility
hdmi on a vga connector. smh.
Interesting, I have been using passive HDMI->VGA cables on various systems (>10 years ago).
So much misinformation out there, which also breaks with another thing I've been taught years ago: DVI and HDMI carry the exact same signal and feature the same 29 pins, just in a different form-factor. Apparently not true?
I'm confused now 😆
@fribbledom yep, that's not true. dvi has lots more pins (https://en.wikipedia.org/wiki/Digital_Visual_Interface) and hdmi also has features like an audio return channel or ethernet over hdmi (https://en.wikipedia.org/wiki/HDMI).
the pinouts are really nice on wikipedia :3 also i never knew just how many dvi variants there were!
Interesting, apparently the 29-pin HDMI would have been HDMI Type B, which never made it to the market.
Another oddity: Wikipedia claims DVI can't carry audio signals, but my old 27" DVI monitor here does exactly that as we speak 🤔
"Although DVI was not designed for audio, some graphics card manufacturers created a way to bypass the restrictions, so they can carry over video and audio signals. We’ll run through the exact steps needed to carry over DVI audio in the next section."
@ln I wonder if you could use the SERDES as a DAC like a Delta Sigma modulator.
@uint8_t @ln Hm, though that already uses a DAC chip instead of using a SERDES to make low-frequency analog signals... It won't work on a usual device, you'd need an FPGA for that, but then it should be possible to make a HDMI / VGA combo port by using the HDMI signals as analog signals. If you have 5 GS/s at 1 bit, you could get like I think 100 MHz at 6 bits?
@x44203 yeah it should work in theory with a low pass filter
@x44203 hmm, maybe? there's lots of really cheap ways to produce vga output.
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