==== Console Output ====
Console output (via BDOS functions) ultimately uses TXT OUTPUT so executes has the potential to execute firmware control codes and displays display CPC firmware characters. However, BDOS function 2 (Console output), which has control before TXT OUTPUT, looks for some specific characters and will perform specific processing regardless of whether it is part of a control character sequence or not. Fore example, Console Output looks for TAB (&09). Therefore use BDOS function 6 (Direct console input/output) to avoid this processing. With this function you can use the control codes to define windows, change modes, change colours etc.
==== Serial number ====