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SCM is a very simple FILCOM program for the -20.
It takes 2 input files, the original and the modified file, and
then an output file (if left out, this becomes the terminal). Switches may
be added to the end of the line. The available switches are:
/EXIT Exit when done. Done by default if given a proper
/WINDOW:n how many lines must be the same before SCM believes
that any given difference is over. The default is 4.
/SCM:Y or N Whether to use SCM output. The alternative output
form currently mimics FILCOM fairly closely.
/MESSAGE: NONE or SAME or DIFFERENT
Generates a Question-mark error at the end of the run
if the files were the same or different, according
to the switch. /MESS:NO means no message is generated.
The default is /MESS:SAME
/MACRO:Y or N If the source is a macro source file, and hence has
labels in it. The default is Yes.
SCM compares in a manner analogous to FILCOM, save that blank lines
are not ignored, and any change on a line is considered grounds for mentioning
the line. It runs in less than one half the time FILCOM does, but has less
SCM normally reprompts after a compare finishes. Typing a <CR> to the
prompt is taken as an exit command.