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Arguments in the argument string are space separated, this string is null terminated.
For example, using 'rm' command should set up BHL pointing to ":epr.0/bin/rm",0 and CDE to "rm -f filename.ext",0 (C=0 and DE below $2000).
Arguments passing to ELF program is performed by this call. The call push the arguments from right to left according SDCC convention.
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