NAME
        Exit -- Exit from a program

    SYNOPSIS
        Exit( returnCode )
              D1

        void Exit(LONG)

    FUNCTION
        Exit() is currently for use with programs written as if they
        were BCPL programs.  This function is not normally useful for
        other purposes.

        In general, therefore, please DO NOT CALL THIS FUNCTION!

        In order to exit, C programs should use the C language exit()
        function (note the lower case letter "e").  Assembly programs should
        place a return code in D0, and execute an RTS instruction with
        their original stack ptr.

    IMPLEMENTATION
        The action of Exit() depends on whether the program which called it
        is running as a command under a CLI or not. If the program is
        running under the CLI the command finishes and control reverts to
        the CLI. In this case, returnCode is interpreted as the return code
        from the program.

        If the program is running as a distinct process, Exit() deletes the
        process and release the space associated with the stack, segment
        list and process structure.

    INPUTS
        returnCode - integer

    SEE ALSO
        createproc(), createnewproc()