I did some more tests. When I do build unmodified qi, flash the image, it runs fine.
But if I insert a single puts() line in src/cpu/s3c2442/start_qi.c : start_qi, just after qi info is printed and before bootloader_second_phase is called, it hangs and prints Ts. I have no idea how a single puts call added just after other puts can break qi. Looks like I miss something important here. Regards, Dmitry
