Identifying Machine for DEC Memory

[Nigel Johnson]

I have a copy of the DECDirect catalog dating back to somewhere in the 
90's, and it runs under W98 on a VM under SuSE!

I search for the 2-5-2 part number with no results, although it has 
MS01,MS02, MD42, and MS-62.

I used to have a cross reference to 2-5-2 numbers somewhere and if I 
find it I will have another try.,

Sorry!

Nigel


On 01/04/2020 10:39, Liam Proven via cctalk wrote:
> On Wed, 1 Apr 2020 at 16:13, Rob Jarratt <robert.jarratt at ntlworld.com> wrote:
>> This is the listing: https://www.ebay.co.uk/itm/VIntage-DEC-VS4000-memory-SIMM-50-19464-02/223624600040
> That is... not very informative. :-(
>
> I also note that the listing just says VS4000 and does not specify a model.
>
> It could be one of 5 different models, all of different speeds: a
> 4000/60, 90, 90A, 96 or VLC.
>
> Could you just put the DIMM onto a flatbed scanner or something?
>
> The -12 on the chip part number implies 120ns RAM to me. That is slow
> by modern standards -- before EDO came in, PCs tended to take 70ns,
> 80ns was slow and 60ns was fast. 120ns would be quick enough for a
> 4000/60 or 4000/90, marginal for a 4000/90a and too slow for a VLC or
> 4000/96.
>
> Speeds from:
> https://en.wikipedia.org/wiki/VAXstation#VAXstation_4000_Model_VLC
>
  

-- 
Nigel Johnson
MSc., MIEEE
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