DEC 3000 (alpha) faultfinding
Maciej W. Rozycki
macro at linux-mips.org
Wed Apr 4 04:10:52 CDT 2018
On Sat, 31 Mar 2018, Peter Coghlan via cctalk wrote:
> I ran the various tests provided by the different jumper settings on my second
> 3000 600 and I found that the memTest (no-cache) LongWord Memory Test (position
> 5, J3) failed as well as the tests involving the cache. In an attempt to find
> which memory was failing, I swapped around the memory risers. Bizarrely, the
> (no-cache) failures went away completely when I swapped around the front two
> risers. The failures returned when I swapped them back. This is very odd as
> the two risers appear to be identical and seem to be populated with identical
> SIMMs.
Have you tried cleaning the pins?
The riser connectors are the same style DECstation 5000/200 MS02 memory
modules use and I had cases of ECC errors appearing with those which went
away once thorougly cleaned with IPA. Lone reseating didn't help.
Maciej
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