Seems logical enough that someone at the time bought a 128K machine and stuffed in a bunch of ram chips they may have had laying around at the time. Memory was kind of expensive - especially new from IBM. That's totally something I would have done at the time (and probably did, but it was likely an XT for me).
Joe > On Apr 10, 2024, at 9:51 PM, Just Kant via cctalk <cctalk@classiccmp.org> > wrote: > > I sort of doubt any of these boards were factory supplied this way, but the > date codes on the ram in question are consistent with most other ics . the > other banks contain chips that are months older, or newer. > > 64-256KB SYSTEM BOARD > > 18 TI gold capped 4164-20 chips in banks 0 and 1. > > Mix of Fujitsu, TI, NEC chips in banks 2 and 3. > > There are a half dozen numeric codes present on the board. I don't know what > any signify.
