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Pixel clocks... haven’t thought about those in a looooong time. When my old 14” packard bell monitor world act up i would bust open x11config and taze it with a hilariously overdriven clock. Probably should be illegal.
Nice! Everything I'd seen before was DVI. What about HDMI input? What I'm imagining is an HDMI freeze button, to buffer a single frame. Many projectors have that feature built in, but some don't, and I wish I could build it as an external hardware device.
Pixel clocks... haven’t thought about those in a looooong time. When my old 14” packard bell monitor world act up i would bust open x11config and taze it with a hilariously overdriven clock. Probably should be illegal.
As someone who has read lots of anecdotes (but sorely little actual anec data ) about poking CRTs with out-of-range values and has thus kept well within defined limits for fear of breaking my own stuff... what did this do?
Isn't the reason they use DVI that it helps avoid the HDMI licencing costs? Not the FPGA implementation, but the adopter licence fee.
The FPGA I'm using has HDMI and was made by Arduino, but they are not an HDMI Adopter: https://store.arduino.cc/usa/mkr-vidor-4000. "Raspberry Pi Trading Ltd" is one though.
There's a parameter to make the output be DVI only if it's a concern, I'll make a note of this in the README.
Thanks for this. You should look into getting this into the fusesoc repository, if possible. https://github.com/olofk/fusesoc
Brilliant!
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How does this work? Isn't the Apache license somewhat more restrictive than the MIT license? Why bother with both?
Isn't the reason they use DVI that it helps avoid the HDMI licencing costs? Not the FPGA implementation, but the adopter licence fee.
From what I've read, you are supposed to become an "HDMI Adopter" to legally sell products that use HDMI. There's a flat annual fee plus a per device royalty fee. Not sure how well enforced it is, since there are over 1,000 terminated adopters: https://hdmi.org/adopter/terminated . I wouldn't be surprised if some of their products are still on Amazon and other places. The FPGA I'm using has HDMI and was made by Ardui…
For example, the F18Amk2 project at https://atariage.com/forums/topic/280138-f18a-mk2/ which is implementing a TMS9918A has hit this problem.
I am inclined to agree that enforcement isn't 100%, but wanted to flag this up as it's relevant to your users. Thanks for adding the note!