This routine implements the UN*X system call (in spite of the fact that I 
called it exec, the name in the DOS manual) under Lattice C although it 
should be easy to adopt it to other languages.  One caution, it uses the 
undocumented 037h DOS call to retrieve the switch character. This is
marked in the code and I will change it after DOS 2.0 so I'd rather
the DOS purists don't jump down my throat about this. If you don't like it
the way it is, change it. 


                                                    Darrell Plank 
                                                    BTL-IH 
EXEC.ASM has been superseeded by EXEX2.ASM and EXEC3.ASM by Marco Papa.
I originally wanted to produce a single routine that would have worked with
both .COM and .EXE programs, but I could not find any "documented" way to
check, at run-time, if I am running a .EXE or a .COM program, so that I
can properly access the PSP.  Any idea?

Hopefully these will be combined to a single program again and renamed
EXEC.ASM
(Marco Papa papa%USC-CSE.#USCnet@USC-ECL.ARPA 5/12/84)