Re: Anybody have a manual for the AST RamStak Plus IIgs Memory Card? (eom)

["Michael J. Mahon" <mjmahon@aol.com>]

Glenn Jones wrote:
> pilgrimer@gmail.com wrote:
>
> > http://www.syndicomm.com/~pilgrimer/nfh/ramstak.sit
> >
> > I found that lurcking on the Vulcan of a GS I have
> > -Bart
> > Keeper of the Network From Heck
> Hi Bart,
>
> Thanks for the software.
>
> The Card I have seems to be somewhat flakey as I get errors on booting 
> GS/OS some times.
>
> I have reseated all the RAM once which seemed to work for a day or so
> I then replaced all the RAM with RAM from a 1 MB apple RAM card which 
> also seemed to work for a while.
>
> My conclusion is that one of the soldered on memory or support chips is 
> marginal ..
>
> Anybody have a circuit for a dram chip tester?

Rich is right--the parameters you really care about will only
be tested by extended running of a IIgs memory test, not by
any tester.

I would also suspect cracked solder joints or a microscopic crack
in a copper trace.  If you can arrange to heat and cool parts of
the board locally (hair dryer and cooling spray) you may find the
area causing trouble.  Applying pressure with a plastic rod can
also help.  All these tests need to be done _while_ a memory test
is running.

-michael

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Home page:  http://members.aol.com/MJMahon/