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. :) Maciej
