Turro75

Results 3 issues of Turro75

I enabled the uart6, tested with ESP3D. ESP3D also work as wireless serial bridge for octoprint with OctoPrint-Network-Printing.

github published bootrom may differs from bootrom of a real pico. dumping (within gdb session) the bootrom hex from real pico allows a better use of gdbdiff when code jumps...

it now works with 2M and 8M flash thanks to Alterbios no need to manually create CONFXXX.CFG files. Changed Rev to 5.7