Re: Looking for GS-RAM+ GSPLD1A.1 Chip

["Henry S. Courbis" <apl2research(a.t.)comcast.net>]

Hey Michael.

> Not so odd.  Each chip adds loads to the address lines, and one
> of the chips in the first 3MB has marginal speed.

Good point.  That is one possibility to consider before we totaly blaime the 
GAL.


> Replace the "bad" chip and you will probably be able to load
> it up with DRAM (unless there are other marginal chips).
> BTW, this points out the value of being able to do full margin
> testing on DRAMs, both for voltage and timing variations--not
> easy on stock systems.

Very true.


Willi:  I have a stand alone DRAM checker.  What I can do is offer to send 
it to you if you'd like to test each DRAM and see what speed they top out 
at.  I also have a module that allows for 'Bank Testing' which will test all 
DRAMs as a group: http://www.memorytesters.com/sim1/bank.htm.  This may also 
yield some answers if DRAM is the issue.

I have a feeling that the GAL upgrade will solve your issue though.  I know 
it solved mine, and your issue sound exactly what mine had been.  Thanks go 
to Macdog for finding us the GAL we needed!  I'm starting to actually like 
that guy. ;-)


-- 
Henry S. Courbis
www.ReactiveMicro.com
Legacy Hardware and Support - Come take a look at what we have to offer!