Identifying Machine for DEC Memory

[Antonio Carlini]

> 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


My VLC has a number of memory modules but they do not have any DEC part 
number on them at all.

The board has "PC72N-9GG" and "JAPAN MH1M36ADJ-8" printed on it.

One side has 8 chips each marked M5M44400AJ 221SK1K-7. Note that unlike 
the photo, there is no "horizontal" chip in the middle.

The other side has four chips each marked M5M41000BJ 224GE04-8. (I think 
it's four ... I've just put the machine back :-))


A nearby DECdirect has:

MS40-BA: VLC 8MB upgrade

MS44L-BA: VS4000-60 8MB upgrade

MS44-DA: VS4000-60 32MB upgrade

MS44L-BC: VS4000-90 16MB upgrade

MS44-DC: VS4000-90 64MB upgrade


So even that doesn't help (since you really want the 2-5-2 part number, 
as that's what you'll usually find on the module).


I did have a quick hunt on the net for IPBs for any of these systems, 
but with no luck. manx shows a few service manuals but they had the MS4x 
numbers.


Antonio


-- 
Antonio Carlini
antonio at acarlini.com