Re: Zip Cache

[pubpc1@library.ucla.edu]

Karl Horster wrote:
> 
>         So I was browsing through the FAQ and I decided after 8 years I
> should upgrade the cache on my Zip.  From what I gathered I need
> 
> (4) 32kb X 8 SRAMS about 20ns
> 
>         So I popped on down the electronics store and I asked, "I need
> some Static Rams...32k by 8."  So the guy whips out a 32MB SIMM.  And I'm
> like no...32 KILOBYTES.  So then he's like that's a chip right, can't get
> it unless you have a part number.  So I explain to him I'm upgrading and I
> don't know what the part number could possibly be, and I'm like don't you
> have catalogs?  And he's like nope....great place let me tell you.  So
> some one who's already upgraded could give me their part numbers off their
> chips...preferably the wides.....thanks.

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.

-Scott G.