Re: ZIPGS

["Charlie" <charlied@NOSPAMbboard.com>]

"Andrew Webber" <Andrew.webber2@btinternet.com> wrote in message
412ceeb0.0205201357.ad10c15@posting.google.com">news:412ceeb0.0205201357.ad10c15@posting.google.com...
> "Charlie" <charlied@NOSPAMbboard.com> wrote in message
news:<acb5a0016fe@enews3.newsguy.com>...
> > "Andrew Webber" <andrew.webber2@btinternet.com> wrote in message
> > 6b297ed0.0205191041.2247cc39@posting.google.com">news:6b297ed0.0205191041.2247cc39@posting.google.com...
> > > I finally got hold of an accelerator for my IIGS, but I recieved it
> > > with no instructions. I have looked on the FAQ and got all the dip
> > > settings sorted. I am unsure which model ZIP card I have. Its a ZIP GS
> > > 1.01 with the following chips:-
> > >
> > > + Oscillator - 32Mhz. 2 pin type. Based on the FAQ this should be a
> > > 8MHz Zip
> > > + Largest Chip - 9043 WD4701
> > > + WDC W65C816PL-7 (7Mhz?).
> > > + 4 Cache banks. TAG 1 = UM62640-70L, DATA 1 = 6264BL-10, TAG 2
> > > =6264-70L, DATA 2 = 6264BL-10. Cache size? The system says 16K in the
> > > CDA.
> > >
> > > Is this a 8Mhz/16K Cache model?
> > >
> > > The problem is that the system hangs every now and then. I thought it
> > > might be because its actually a 7Mhz/8k card not an 8Mhz/16K card? The
> > > system will work for a relatively long period then it will just stop.
> > > This has happened in GS/OS and in a game. I am able to soft reset the
> > > machine and all is ok, I don't have to power off, so I don't think its
> > > heat related.
> >
> > There is a remote possibility that the system hanging problem is being
> > caused by a known bug in the ZipGS CDA.  Under certain conditions the
CDA
> > writes a zero into the wrong memory location, possibly into another
program.
> > I believe there is more information and a fix in the CSA2 FAQs.
> >
> > Charlie
>
> I had a look in the CSA2 and could not see anything on the fixed CDA.
> Do you know where to get hold of the new CDA?,FTAs version, or Zippy?
> I have looked everywhere but am unable to get a usable version.

I guess my memory about the information being in the CSA2 FAQs was wrong.
Google groups has a lot of information from previous discussions.  Try this
link:

http://groups.google.com/groups?hl=en&lr=&q=zipgs+cda+bug&btnG=Google+Search
&meta=group%3Dcomp.sys.apple2.*

One of the fixed files is called ZipDAv137shk.bin but the only link I can
find is dead.

The file below contains v1.3 but I'm not sure if it is the fixed CDA.

http://www.apple2.org.za/gswv/A2.LOST.N.FOUND.CLASSICS/ZipGS_sdk.bin

Charlie

> >
> >
> > > Also what is the easiest upgrade I can do to this card without
> > > involving any major work (I would not trust myself with a soldering
> > > iron!). If its chip replacement does anyone now a good source for the
> > > right type of cache/processor chips?
> > >
> > > Thanks for all your help in advance! :-)
> > >
> > > Andrew