The mainboard is an E-series board, memory seems to be standard performance. -Rik -----Oorspronkelijk bericht----- Van: "Mattis Lind" <mattislind at gmail.com> Verzonden: ?20-?4-?2015 08:33 Aan: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Onderwerp: HP21MX boards on Ebay. Someone (not me) in Germany is selling a number of cards from a HP21MX machine. Some boards have date codes from 1974 so I guess it is an M-series. Not sure what cards there are in this lot, but it is for sure the CPU boards itself, some memory boards and what looks like some serial boards. http://www.ebay.de/itm/16-Neuwertige-HP-Speicher-Platinen-und-andere-/23153…