[Info-vax] XP1000 memory

[Phillip Helbig undress to reply]

In article <plrji0$9er$1 at gioia.aioe.org>,
helbig at asclothestro.multivax.de (Phillip Helbig (undress to reply))
writes: 

> Looking from the back of the machine (so that the left side is open when
> the cover is removed), bank 0 appears to be every other slot starting at
> the rightmost slot and bank 1 every other slot starting at the leftmost
> slot.  Correct? 
> 
> What are the requirements for SIMMs?  Does each bank have to be either
> completely full or completely empty?  Do all SIMMs in each bank have to
> be identical? 
> 
> What is the maximum SIMM size?  256 MB (for 2 GB maximum memory)? 

The XP1000 which died had 2 GB of RAM.  The replacement machine had 256 
(4×64 in bank 0).  I swapped the memory.  After that, in the replacement 
machine I saw 1024 in bank 0 and nothing in bank 1.  After making sure 
that all the SIMMs were seated properly, it showed 1024 and 512.

Is there any way to find out which slot(s) show too little memory (in 
which case it could be a problem with the slot or a problem with the 
SIMM)?

It's probably not a good idea to remove and re-insert the SIMMs more 
often than necessary.  :-(