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Re: G3 upgrade L2 cache
> >> I just pulled the card. It's a "Sonnet Crescendo G3" and the
> >> sticker also says "300/512". [...] assume the 300 is the clock
> >> speed and the 512 is the cache size. This helps, but still leaves
> >> me wondering what clock ratio to use and which of the L2RAM values
> >> it wants.
> > According to that web page, the 512k cache Crescendo G3's L2 runs at
> > 150 MHz (2:1).
> Well, according to that page, there exists a 300MHz Sonnet G3 card with
> 512K of cache running at 150MHz. Lacking any particular reason to
> think there exist no other Sonnet 300/512 cards, I'd been considering
> this nothing more than a hint - especially since it says "Crescendo
> PCI", and my card is not marked "PCI" as far as I can see.
If I recall correctly, this is a matter of nomenclature. What I
think this means is that this is a CPU card for a "PCI" MacIntosh
model, where 7600 is one in that family; I beleive this model was
among the first MacIntosh machines to have a PCI bus.
> >> If I get those values set wrong, can it actually fry hardware, or
> >> will it corrupt memory at worst?
> > It'll crash. There's no chance you'll fry any hardware.
> Well, then, I can just try all three L2RAM values and see which one(s)
> work(s). I feel much less worried about experimenting when a wrong
> guess means the OS crashes, rather than letting the magic smoke out.
Again, to be concrete, I'd suggest, in your case:
# Enable & config 512KB cache on 1/2 speed on G3 300MHz board
I'm just guessing that "Pipeline burst" is correct in your case;
that's what worked with my G3 Sonnet Crecendo 350MHz card in an
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