🚀 go-pugleaf

Steve Firth <filter@firthcom.demon.co.uk> wrote:

> Steve Rogers <thebeast@nospam.demon.co.uk> wrote:
> 
> > The 6200 is a transitional model.  It makes the PowerPC Upgrade Card
> > sound at startup rather than the 6100's Stanley Jordan chord, and its
> > motherboard apparently runs at half the 75MHz of the CPU.
> 
> The 6100 nalso runs its board at 1/2 the speed of the CPU (ie at 33MHz).
> I suspect the speed gains seen on the 601 indicate just how slow the
> processor is. The faster 603 probably doesn't struggle with emulation
> the way the 601 does.

The difference in performance comes from the size of the internal L1
cache in the 603 chip (not to be confused with L2 cache). On the 601 the
emulator for 68k code has to be loaded in parts, on the 603 it will fit
inside the cache leading to better performance.

In speed terms there is very little between the 601 and the 603,
basically there was a bit of a clean-up internally which allowed more
cache to be added in the 603. With the 603e you start to see a
performance increase with some instructions over the vanilla 603.

-- Kate

Catherine Ferris                kate@tycho.demon.co.uk
Director                        Tycho Consultants Limited

'This above all: to thine own self be true,
 And it must follow as the night the day
 Thou canst not then be false to any man.'   -- Hamlet