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composite video (Feature Request) #17

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robot797 opened this issue Oct 26, 2024 · 1 comment
Open

composite video (Feature Request) #17

robot797 opened this issue Oct 26, 2024 · 1 comment

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@robot797
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I have a few (way to many) pal black and white crt's
and I am wondering can this project be modified to output composite so that I can use small crt's

@evansm7
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evansm7 commented Dec 13, 2024

Technically yes! :) There are a few things needed:

  1. Get video.c to output a PAL-like resolution and rate (e.g. 50Hz, 312/313 lines interlaced), and deal with the blanking borders etc.
  2. Make composite sync (hacking the PIO)
  3. Wire resistors appropriately so that data goes from black to white voltages and syncs go to 0V

There are probably Pico libraries that already do 1-2 so easiest to find one of them... and get them to deal with the weird Mac resolution. I can try to help if someone wants to have a go.

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