NAME
        FindConfigDev - find a matching configdev entry

   SYNOPSIS
        configDev = FindConfigDev( oldConfigDev, manufacturer, product )
        D0                         A0            D0            D1

   FUNCTION
        This routine searches the list of existing configdev
        structures in the system and looks for one that has
        the specified manufacturer and product codes.

        If the oldConfigDev is NULL the the search is from the
        start of the list of configuration devices.  If it is
        not null then it searches from the first configuration
        device entry AFTER oldConfigDev.

        A code of -1 is treated as a wildcard -- e.g. it matches
        any manufacturer (or product)

   INPUTS
        oldConfigDev - a valid configdev structure, or null to start
                from the start of the list.
        manufacturer - the manufacturer code being searched for, or
                -1 to ignore manufacturer numbers.
        product - the product code being searched for, or -1 to
                ignore product numbers.

   RESULTS
        configDev - the next configdev entry that matches the
                manufacturer and product codes, or NULL if there
                are no more matches.

   EXCEPTIONS

   EXAMPLES
        /* to find all configdevs of the proper type */
        struct configdev *cd = null;

        while( cd = FindConfigDev( cd, MANUFACTURER, PRODUCT ) ) {
                /* do something with the returned configdev */
        }

   SEE ALSO

   BUGS