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The purpose of this site is to teach the fundamentals of creating graphics and having them show up on an external display. Driving a VGA signal is extremely straightforward compared to the complexity of HDMI. Generating an HDMI signal is arguably not the main goal of the site, so using VGA makes total sense imo.

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The examples aren’t limited to VGA; I support four different outputs with these designs.

* VGA using a Pmod board (you could also create your own register ladder)

* DVI using the TI TFP410 on the DVI Pmod board

* DVI generated on FPGA with a Verilog TMDS encoder (no IC required)

* SDL simulation on a PC

DVI is a subset of HDMI, so works on modern TVs and monitors.

You can find the source on GitHub: https://github.com/projf/projf-explore/tree/main/graphics/fp...

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