[Info-vax] XP1000 memory

[Bill Gunshannon]

On 08/25/2018 09:20 AM, Phillip Helbig (undress to reply) wrote:
> 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.)
> 

I had some XP1000 SIMMs.  Tried to give them away (unsuccessfully) a
year or two ago.

bill