Re: G3 upgrade L2 cache (was Re: severely bad timekeeping)

[John Klos <john%ziaspace.com@localhost>]

> > http://www.lowendmac.com/ppc/g3card.shtml
>
> That helps only if you already know the make/model of the CPU.  I was
> hoping there would be a way to get it to tell me how big its cache is,
> what clock ratio it wants, that sort of stuff.

Well, that page and any markings on the CPU card should do it.

> I just pulled the card.  It's a "Sonnet Crescendo G3" and the sticker
> also says "300/512".  Since NetBSD says it runs at "305.89 MHz", I am
> inclined to 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).

> 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.

You'll notice that your system will be SO much faster with L2 enabled...

John