On Sat, 15 Nov 1997, Colin Wood wrote:

> Bill Studenmund wrote:
> > 
> > What speedup? True 70 ns chips are faster than 80 ns, but I was trying
> > to get at the fact that the Mac doesn't change its memory timing (at least
> > in these computers), so the CPU will take as long to access 70 ns memory as
> > 80 ns memory. So a full bank of 70 ns will be accessed as fast as a full
> > bank of 80 ns RAM, which is as fast as a mixed bank.
> 
> Really?  I didn't realize that.  I'd thought that it could actually
> access faster memory faster, but I guess that implies some kind of
> dynamic memory bus speed detection that just doesn't exist on Macs.  Oh
> well, you live and learn :-)

I do remember that the Radius Rocket explicitly could reconfigure itself
explictly for faster access if you used the same consistent speed, down to
60ns.  That was the only mention I've ever heard of any hardware on the
Mac that does it... :-/

--
Nathan Raymond