I haven’t checked but don’t think that the second core was bitbanging the VGA signal. The RP2040 has PIO (programmable I/O) mini cores that can read directly fr

I haven’t checked but don’t think that the second core was bitbanging the VGA signal. The RP2040 has PIO (programmable I/O) mini cores that can read directly from RAM (DMA) and address the GPIO pins directly. They most likely used that to their advantage. Edit: yes, see https://kilograham.github.io/rp2040-doom/rendering.html https://kilograham.github.io/rp2040-doom/rendering.html