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SBASIC Manual - Page 60

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     SBasic User's Manual     SBasic Version 2.7             Page 60
     Printed:  December 5, 1999
     Character I/O on the 68hc11



     The PRINT and OUTCH statements generate code for sending characters
     and text to some type of host, using library routines.  For the
     68hc11, this defaults to routines that use the SCI.

     Note, however, that SBasic does not actually set up the SCI for serial
     transfers.  Thus, it is not usually enough to simply PRINT a string;
     your code must first (as a minimum) enable the SCI transmitter and set
     the SCI baud rate.

     This same requirement exists for the INKEY() function.  Before your
     code can successfully invoke the INKEY() function, it must first
     enable the SCI receiver and set the SCI baud rate.

     Fortunately, this is a simple task.  Assuming the 68hc11 target system
     uses an 8.0 MHz crystal, the following statements will set up the SCI
     for 9600 baud and enable the SCI receiver and transmitter:

          include  "regs11.lib"

          main:
          pokeb  baud, $30              ' 9600 baud
          pokeb  sccr2, $0c             ' enable rcvr and xmtr
          print  "Hello, world!"        ' now say something

     If your 68hc11 target system uses a crystal frequency other than 8.0
     MHz, consult the Motorola technical literature for the proper data
     value to POKEB into the BAUD register.