I use a DS80C320 (Dallas) and wants to try running at 35.2512 MHz (I know it's beyond the specs.) but the quartz I bought needs to
be operated on 3rd harmonic.
My nice micro does not want to leave the first harmonic (11.7 Mhz)

Any tip to let it work on the 3rd harmonic
(with one or 2 RC )

Thanks in advance.