Subject: mc68030
To: None <jtc@cygnus.com>
From: Gordon W. Ross <gwr@mc.com>
List: port-sun3
Date: 07/19/1995 18:34:36
> Date: Wed, 19 Jul 1995 14:33:20 -0700
> From: "J.T. Conklin" <jtc@cygnus.com>
> Duncan> Of course, the on-chip MMU and cache aren't enabled, and I
> Duncan> don't know of the measure of improvement with the '030.
>
> Hmmm, the work I'm doing on the 3/80 might be able to be tweaked to
> recognise a '030. I wonder if the Sun MMU can be disabled? I'll have
> to check the arch manual.
The Sun3 MMU is always enabled (well except in "boot" mode, where
all CPU instruction fetches are forced to the PROM with a big gate).
So all you can hope for on a Sun3 (as opposed to Sun3x) is to have
larger cache size on the CPU (and better instruction times).
Gordon