Re: best for Linux: iBook or PowerBook?
On Wed, Jan 21, 2004 at 06:54:36PM +0100, Gabriel Paubert wrote:
> On Wed, Jan 21, 2004 at 05:27:32PM +0100, Sven Luther wrote:
> > On Wed, Jan 21, 2004 at 05:20:16PM +0100, Vincent Hanquez wrote:
> > > On Wed, Jan 21, 2004 at 04:27:47PM +0100, Sven Luther wrote:
> > > > Are you sure ? Notice that the only difference between a 744x and the
> > > > corresponding 745x is the absence of external L3 cache. In particular,
> > > > there is no way to tell which version of the CPU is used from a software
> > > > point of view. So, of using a 7445 or a 7455, and given the fact that
> > > > the G4 iBook doesn't have external L3 cache (or does it), which one do
> > > > you believe Apple did use in the iBook ?
> > >
> > > Hmm. report as 7455 by cpuinfo.
> >
> > Yeah, i know, my 7447 also reports as a 7457, and i know that it is a
> > 7447, because it is written on the chip among other reasons.
>
> Well, the 744x chips are easy to tell from the 745x, because the former
> have a smaller packages than the latter. The L3 cache interface takes
> of the order of 100 pins you know....
Yeah. Cheaper to buy also.
> > > But that's true there's no L3 cache on this one.
> >
> > Only difference trully. I think it would be nicer to report it as
> > 7445/7457 or something such.
>
> A real geek would write this 74[45]7:-) Now is there a way to determine
> this by attempting to read (or modify) l3cr?
Not sure if this works.
Friendly,
Sven Luther
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