SL
- SL_enable_serialconsole-1152-3.1-4: enable serial console for 38400 baud
- SL_enable_serialconsole-192-3.1-4: enable serial console for 19200 baud
- SL_enable_serialconsole-384-3.1-4: enable serial console for 38400 baud
- SL_enable_serialconsole-96-3.1-4: enable serial console for 9600 baud