'''Defined communication classes are:'''
*Class A CPC: Communication with up to 19200 19.200 Baud*Class B CPC: Communication with up to 38400 38.400 Baud*Class C CPC: Communication with up to 76800 76.800 Baud*Class D CPC: Communication with up to 153600 100.000 Baud
Example: A 6128 with two disc drives, 512 KB expansion RAM and an serial interface from Amstrad would be: Class 5A.