HP21MX boards on Ebay.
mattislind at gmail.com
Mon Apr 20 01:33:10 CDT 2015
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.
More information about the cctech