Texas Instruments MSP50C614 - Manual (Page 332)

Software Emulator
5-32
5.6.8 Known Differences, Incompatibilities, Restrictions
- Include statements in assembly language files must enclose the file name
in double quotes.
- REF/DEF statements in assembly language files should be replaced with
EXTERNAL/GLOBAL statements, but the old REF/DEF are still
supported.
- There is no default type for variables in the C– – compiler. The user should
always use
int or char.
- Typedef is not supported in C– –
- To use external functions in C– –, put a function prototype in the file that
calls the external function.
- To use external variables in C– –, declare them as extern. Note that only
the file containing the main routine can contain global variable
declarations.
- If cmm6xx.asm is included in a project file, the resulting linked file will have
a start vector address (address 0x7FFF) of _main1 , corresponding to a
line in cmm6xx.asm that forces a jump to _main0 . The C– – compiler au-
tomatically defines a _main0 label just prior to forcing a call to _main , if
there is a C– – file containing the main routine. If not, it is up to the user
to define a
_main0 label in one of the assembly language routines: this
will be the starting point of the program.