>> On Mar 27, 2017, at 9:15 AM, Ethan Dicks via cctalk <cctalk@classiccmp.org> >> wrote: >> Was there ever a quad MOS memory board for the 11/20? It would have >> to be 4K or less, I'd expect, given the era and size of RAM. I know >> by a few years later, with the 11/04, MOS was becoming common. > > I don't know of MOS memory appearing in 11/20s as built by DEC, but there's > no reason against it. It's just Unibus memory. It wouldn't have to be 4k > either; if you had a 32kW memory card that should work just fine. > > paul
After seeing this modern memory board project for the PDP-8/e using NVRAMMs http://www.tronola.com/html/ram_for_pdp-8e.html I wonder how much effort it would be to refactor the Omnibus logic to Unibus to build a PDP-11 version, and thus have a quad size card for /15's and /20's? Steve.
