b3ncs1

Try another COM ports, if you wired everything right one of them has to work.

for those want to use a pico, i wrote down the whole process that worked for me - i used this exact fw: https://github.com/JoeSc/pico-sexa-uart-bridge - i soldered in the connections on the picture with 40awg wire - the pico emulates 6 com ports, and i used the 4. one, you have to test it which works for you - verified with a stock bios dump from an 1.6 to ensure the communication between the pc and the console is flawless. (note: i couldn't dump the bios succesfully with the dumper script.) - when the stock bios verification ended succesfully i flashed the cerbios.bin note 2: you can make soldering the txd via easier if you scratch it a little with an exacto knife note 3: i used the lpc port ground point