Zitat von
hap
Or you could just add a CPU frequency switch to the driver itself, similar to Novag Super Expert.
Well, that would of course be possible, but then you could also change the CPU frequency for the other 2 modules (Sargon 2.5 and Sandy), but they go crazy with these higer speed. So that's not a good idea.
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The 20MHz version by SteveUK(?) probably has ROM modifications for the changed timing.
I don't think this is needed, because I've already tried 20MHz for the CPU on the Steinitz module (with the VIA6522 frequency unchanged at 2MHz), and everything worked fine - just the clock is running a little bit faster (but only a few %).