Re: Zip Cache

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

On Sun, 8 Feb 1998 pubpc1@library.ucla.edu wrote:

> 
> I invite you to look at my Illustrated Guide to Upgrading the Zip GS,
> a HyperCard IIGS stack.
> 
> http://ground.isca.uiowa.edu/apple2/apple16/Hypermedia/Hypercard/ZipUpgrade.BSQ
> 
> Just follow the URL.  There is also an SHK archive in the same
> directory as this BSQ one.
> 
> The chips you want can be had from JDR Microdevices at this
> site: http://www.jdr.com/
> 
> The part number is HM62256LP-10 for the wide ones, I think
> (see the stack to be sure).  If you want to go beyond 10MHz,
> you'll need faster ones in the TAG sockets.  Look at DigiKey's
> catalog for the skinny to wide adapter sockets you'll need.
> Again, all the info is in the stack.
> 
> The info is more update than the one in Nate's FAQ.
> 

Please be advised that the skinny to wide adapter sockets that
are in the DigiKey catalog WILL NOT WORK on the ZipGS. This was
gone over years ago when we first started to upgrade our ZipGS's.

Since wide SRAMS are so hard to come by in the faster speeds, the
only real alternative is to modify your ZipGS with a new row of
sockets which will accomodate the skinny SRAM chips. This requires
knowledge in soldering or finding someone to do the mod for you.

Paul.

pschultz@med.wayne.edu
Paul Schultz