ASCII commands and special chars

Sometimes ASCII is a good way to set up the screen or palette without too much code...

Escape and US commands

Teletel mode allows you to use semigraphic chars. Switch on by sending 0xE, off with 0xF. In Teletel mode each char is divided in 6 areas as follow:

AB
CD
EF

To print a char, encode its data as 0F1EDCBA. Other values may not be used. Control chars could still work (?) and colors will be taken into account (?).