Hi All, I am trying to modify the kernel in such a way as to be able to write to a serial port at a very early stage of kernel start-up (as early in main.c kernel_startup as possible). This is obviously well before /dev/ttyS0 etc are available. The reason for wanting to do this is to talk to a Serially addressed LCD display on a headless embedded Linux machine I am experimenting with. I still want to maintain full serial console on Serial port 1 but would like to be able to write small amounts of arbitrary character data to Serial Port 2 (Such as 'Kernel Booting', 'Starting devices' etc. so that the boot status can be observed on the LCD which is attached to Serial Port 2. The display is only 2 x 16 Characters so obviously a full printk is not appropriate. Can anyone please point me in the direction of some relevant information or sample code as I am not getting very far and having spent a few days on this am starting to pull my hair out. Many thanks, Simon Simon Talbot MEng, ACGI (Chief Engineer) Net Solutions Europe Limited -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
