NAME
        AbortIO -- remove an existing timer request.

   SYNOPSIS
        error = AbortIO( timerequest )
        D0               A1

        long abortio( struct timerequest * );

   FUNCTION
        This is an exec.library call.

        This routine removes a timerquest from the timer.  It runs in
        the context of the caller.

   INPUTS
        timerequest - the timer request to be aborted

   RETURNS
        0  if the request was aborted, io_Error will also be set to
            IOERR_ABORTED.
        -1 otherwise

   NOTES
        This function may be called from interrupts.

   SEE ALSO
        exec.library/AbortIO()

   BUGS