Post #1762166
2026-04-25 16:40 UTC
The second Pico you see on the video is just a dev probe, it’s not doing anything. The Pico on the right is the one sampling and generating the DVI signal.
I still have to improve the 5 to 3.3V situation (it should be possible to do it with resistors only, hopefully) and a few finishing touches on the software but I couldn’t be happier!
Also it’s probably time to buy an external BlueSCSI. Poor Quantum lasted more than 30 years but it has its limits. #RetroApple
Replies (1)
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@arroz@mastodon.social 2026-04-25 16:49
The Pico is *very* overclocked, from 150 to 325Mhz. Not because of the sampling (although it helps!) but due to the required resolution on the DVI port (1024x768 for pixel perfect doubling). Sampling it entirely made with PIO, the CPU is just handling DMA interruptions to adjust read and write addresses. Tried a few implementations, most CPU based, but this was the final goal, and it works beautifully! #RetroApple