Identifying Machine for DEC Memory

Maciej W. Rozycki macro at
Wed Apr 1 10:24:10 CDT 2020

On Wed, 1 Apr 2020, Liam Proven via cctalk wrote:

> 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.

 Also the Mitsubishi 41000 is a 1-Mibit part, so the module is 1MiB (or 
2MiB if double-sided).  So you just need to figure out which DEC systems 
used such SIMMs.  If 2MiB, then DECstation 2100/3100 might be a candidate 
and these would be MS01-AA, also working with DECstation 5000/1xx and 
Personal DECstation 5000/xx systems (and probably some VAX machines too).

 BTW, nice talk at FOSDEM 2020, I was there. :)


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