There are at least two entirely different types of the SF354. In fact, I have one that works perfectly with a Gotek (with HxC firmware) without any modifications to the PCB whatsoever. Its PCB looks like this, devoid of any semiconductors:http://www.nightfallcrew.com/gallery/at ... d-release/
Another version of the SF354 indeed has a 8048 controller and some logic gates:http://www.nightfallcrew.com/gallery/at ... t-release/
Jo Even, you're probably referring to that one, then?
Does anyone know why there is such a complex circuit on the PCB of some SF354? According to the serial numbers, the one with the controller was built in 1987, the one without in 1985, just like my SF354.