TURBO_BOOST breaks vga color

[barbiani]

Hi,

I have noticed that enabling the TURBO_BOOST define breaks the correct colors display on the flash_stream sample vga_mode_640x480_60 .

Without TURBO_BOOST, the number is crisp and the blue gradient is perfect.

With TURBO_BOOST, a blue gradient turns to like 64 color dithered green.

Also, white blobs are leaking red pixels to the right.

Are these artifacts usually caused by vga timing error?

Thank you.

[sfranzyshen]

just a guess but looks like it's related to set_sys_clock_khz() ... see other examples below

pico-playground/scanvideo/mandelbrot/mandelbrot.c

Line 277 in e551a2d

#ifdef TURBO_BOOST

pico-playground/scanvideo/sprite_demo/sprite_demo.c

Line 174 in f0ce80c

#ifdef TURBO_BOOST

[barbiani]

Looks like set_sys_clock_khz(300000, true); fixes the flash stream demo.