Why VGA and not DVI/HDMI


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Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 2443
Posted: 01:52pm 22 Jan 2022      

The RP2040 has 264KB of RAM. Obviously it's impossible to use anywhere near that as a frame buffer - you need communication routines and routines to handle the frame buffer, together with some workspace for serial buffers etc. I'd guess that you'd be lucky to get a usable frame buffer of 160KB even if everything is written in C. That 160KB isn't contiguous memory on the RP2040 either - it needs some memory management to page blocks in and out. Remember that you need that on *both* Picos, not just the display one, otherwise you simply can't do "proper" graphics. It's over 3x the current VGA frame buffer. Simply not on.