It's been changed and now I guess I need to reset the video to deal with NTSC? It's not quite that simple. You would need to remove or disable the PAL clock circuit and fit an NTSC oscillator at U65. The CF doesn't seem to be dos formatted and my pc cannot read it. They are dos formatted, or at lea...

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Is regards to fake chips, does anyone know if isopropyl alcohol removes the white print on genuine 68030RP33Bs? Other chips like ceramic 060s where most text is etched, the white print in top right corner seems resilient from what I've seen. Or perhaps the counterfeiters have started using alcohol ...

Welcome down the rabbit hole.

but the oxidation of the leads coupled with the dried solder is quite a different kettle of fish! When I get a part/pad that is too oxidised to take solder I usually try with that Baker's Soldering fluid. It's a Zinc Chloride solution typically used for soldering car radiators! :) It is corrosive t...

Question : is the 32 Mhz oscillator also in charge of delivering the 16 Mhz? Is it the COMBO IC that delivers this 16 Mhz based on the 32 MHZ at its inlet? Yes, the COMBEL accepts the 32 MHz clock input on pin 20, and divides it as necessary to produce the 8 and 16 MHz clocks on pin 191. Yep! Combe...

I'm not 100% sure, maybe someone can check.. But I think the Falcon boots firstly into 8MHz mode and switches into 16MHz later on. That is correct. Oh, I just had a thought too! You don't still have the diag cartridge in do you? I have a feeling (although I could be wrong) that the diag cart uses t...

christophe.griard wrote: ↑Tue Apr 28, 2020 2:34 pm For your information, I ordered some weeks ago a COMBO IC and a VIDEL IC from Best Electronics and the parcel is on its way...

Be careful posting that, because if he finds out you're talking to me, it'll be the last time you ever buy from BeST.

So it is always worth bearing in mind that the faults on machines may not necessarily be where you think they are... Yeah the poor guy isn't out of the mud yet. That's the hardest part. These things are so integrated that the faults are difficult to find... The days of changing out every IC until i...

Can you confirm the floppy LED flashes several time fast followed by a pause without NVRAM fitted ?

Yep. That's exactly what it does.