NAME
    SubTime -- Subtract one time request from another.

SYNOPSIS
    SubTime( Dest, Source )
             A0    A1

    void SubTime( struct timeval *, struct timeval *);

FUNCTION
    This routine subtracts one timeval structure from another.  the
    results are stored in the destination (Dest - Source -> Dest)

    A0 and A1 will be left unchanged

INPUTS
    Dest, Source -- pointers to timeval structures.

NOTES
    This function may be called from interrupts.

SEE ALSO
    timer.device/addtime(),
    timer.device/cmptime()

BUGS