Re: CACHE????

[Paul Schultz <pschultz@med.wayne.edu>]

On 28 Jun 1996, RUBYWAND wrote:

> In article <31D2607C.135D@rmci.net>, Michael Warner <Mikeal@rmci.net>
> writes:
> 
> >I was just wondering why when upgrading the ZipGS or the
> > TransWarp you couldn't use more than 64k cache. It would seem logical
> > that going up to 512k or 1 meg would be real nice. Anybody know if this
> > is available?
> >        It would seem to help the moving of info intensly. ....
> 
>      This sounds like a good idea. You could make the necessary circuit
> mods and plug in bigger RAM. The slightly tricky part would be modifying
> the Zip-GS ROM code so that Zip-GS uses the extra cache.
> 

There is a split cache mod which was floating around a few years ago. But,
I think that was still only 64K at max. It just changed the way the cache
memory was used. I also recall posts about people piggy backing sram chips
on top of the normal cache chips to give 128K. But, this seems a little
bizaar and I always discounted this idea. (Apparently from what I remember
they claimed to physically solder the legs from one chip to the legs of
the chip below it!).

Anyway, going above 64K is probably not doable without some significant
design changes (significant meaning it isn't a mod that we all could do
on our own).

Paul.
pschultz@med.wayne.edu
Paul Schultz