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SBASIC Manual - Page 7

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     SBasic User's Manual     SBasic Version 2.7              Page 7
     Printed:  December 5, 1999
     contains a branch instruction that tests the value of variable N and
     branches back to the WHILE statement if N equals 3.

     For the 68hc11 and 68hc12 MCUs, SBasic normally generates code similar

          ldd  var001
          cpd  #3
          bne  *+5                      branch instruction, line 1
          jmp  whl000                   branch instruction, line 2

     For short transfers, where the branch target is within the relative
     addressing limit of the target MCU, this code is larger and will run
     more slowly than necessary.

     Using the /b option forces SBasic to generate relative branches
     directly to all targets.  If the /b option is in effect, SBasic would
     generate the following code for the above example:

          ldd  var001
          cpd  #3
          beq  whl000                   branch instruction

     Note that the branch has reversed sense, and the JMP instruction has

          WARNING:  Branches to addresses beyond the target MCU's
          relative branch limit will result in assembler errors, even
          though SBasic will not report any compilation errors.
          SBasic does not maintain an internal program counter, and
          will not detect that a branch target is out of range.

     Beginning users should omit the /b option, and accept the slight
     increase in size and execution times caused by the default branch code

     Experienced users may, however, use the /b option to gain improved
     performance.  In this case, however, you must carefully monitor the
     assembler's output for any errors resulting in out-of-range branches.

     If your code generates out-of-range branches using the /b option,
     recompile without the option.  SBasic currently does not support any
     method for selectively compiling direct branches.

     You can select the target MCU by using the /m option.  The format of
     this option is: