Some examples not working with Pico clone

[Stanimir-Petev]

Hello, everyone!

So I was planning to make a pull request adding support (a pinout description in the "common_dvi_pin_configs.h") for one of our boards - RP2040-PICO-PC (https://www.olimex.com/Products/MicroPython/RP2040-PICO-PC/).

But when tested with the provided examples from this repository it worked well with about half of them.
Here is list of the behavior:
Working fine:
dht_logging, hello_dvi, mandelbrot, terminal, tiles, tiles_parallax
Semi-working:
colour_terminal (colors seem weird), moon (picture is visible but only black and white)
Not working:
bad_apple, christmas_snowflakes, dual_display (understandable since I tested with only 1 display), mandel-full, sprite_bounce, tiles_and_sprites, vista
on all of these I see red screen and sometimes blinking lines somewhere on the screen
Vista-Palette - not working at all - it gives me a message "Input signal out of range".

So I was wondering what could cause some of the examples to work fine, some of the others partially and the rest not working at all?
I don't think it's pinout related since then none of the examples would have worked at all and thus I was thinking of making pull request but I decided to ask for this first.
RP2040-PICO-PC_rev_C.pdf

[c1570]

dual_display is broken, see #41
Moon is 1bpp so b/w is okay.

Red lines indicate the RP2040 lagging behind:

PicoDVI/software/libdvi/dvi.c

Line 210 in 5123727

// No valid scanline was ready (generates solid red scanline)

Did you run cmake using -DPICO_COPY_TO_RAM=1 as indicated in the README?