Re: Apple IIgs Accelerato

[sbehrens@contech.demon.co.uk (Soenke Behrens)]

Hi,

In article <1995Jan14.192148.22791@news.stolaf.edu>
           handel@lars.acc.stolaf.edu "Peter F Handel" writes:

> In article <C75502C4@rook.wa.com> DON.HANSON@rook.wa.com (don hanson) writes:
> > B > I have a Zip and I am running at 14Mhz with 64k cache and its great! I
> >I assume you modified an 8 or 9mhz Zip.  How did you do it, if you don't
> >mind sharing this info?
> Well, WDC (Western Digital [Chips?]) has been selling the 14Mhz 65816 for

Actually, it's "Western Design Centre".

> a few months now.  It's not a -E experimental chip, so it costs only $20.
> The catch is that you have to buy at least 5 at a time.

A post here or in a user group should take care of that little problem.

> Also, I've heard a rumor that WDC has a 20Mhz experimental 65816...anyone
> know anything about it?  Thanks...

Nope, never heard of it. If there is, it would be time to rebuild a ZIP ...
and that's so much work that nobody is probably going to do it. ZIP Tech
could, since they have the original schematics and stuff ... but I
highly doubt they would do a "ZIP II". Though it'd be cool as hell. Take
the speed bottlenecks out, change the board design to a four-layer, put
decent SRAMs on, maybe optimize the caching algo a bit ... and stick
a 20MHz CPU in and fly :). Or even, while we are dreaming, have one
socket for one optional SIMM, so you could have like 1, 4 or 8MB "ZIP" memory
which runs at full speed. Sure would be cool as hell, though that'd mean
a major rewrite of the ZIP.
It would also probably cause problems with cards that use RDY to DMA,
like the RF. Hmm, DMA, how'd that work then? Uh, I can see why they
decided against the idea. Oh well. It sounded cool while it lasted.

Soenke

-- 
Standard disclaimer: My opinions are my own, not those of my employer