[Info-vax] XP1000 memory

[Phillip Helbig undress to reply]

In article <plrke3$b3g$1 at gioia.aioe.org>,
helbig at asclothestro.multivax.de (Phillip Helbig (undress to reply))
writes: 

> I'm not sure what it means, but on power-up I see
> 
> FF.FE.FD.FC.FB.FA.F9.F8.F7.F6.F5.F3.F2.F1.F0.
> EF.EE.EC.EB.EA.E9.F4.ED.***No keyboard plugged in***
> E8.E7.E6.E5.E4.

This is consistent.

Some SIMMs could have been damaged when swapping the memory, or perhaps 
bank 1 has had problems for a while (before the swap, the machine had 
SIMMs only in bank 0).  Probably difficult to tell without swapping the 
SIMMs between slots and even machines, which might cause more damage.

At least for a while, I could live with just 1536 MB.  Is there any harm 
in booting the machine in this configuration?

On second thought, while the machine certainly had 2 GB at one time, I 
might have done some swapping years ago, resulting in the present 
configuration with 1536 MB.  If the machine shows 1536 MB, 1024 in bank 
0 and 512 in bank 2, is it possible that all the SIMMs are the same size 
but only half of them in bank 1 are showing up?  Or does this indicate 
that the SIMMs in bank 1 must have half the capacity of those in bank 0?
(They do look different physically, but of course this doesn't mean that 
the capacity must be different.)