It's an HP-IB controlled data acquisition box for large real time industrial test or automation control installations. Very specialized. Think measuring or outputting 100's of analog signals in real time. Most likely meant to be connected to a HP 1000 series computer running the RTE real time operating system. HP's core test and measurement business, and the reason they went into computers at first. This real time measurement and control capabilities could not be matched by other minis or later PCs running Windows for a very long time, and the antiquated series 1000 lasted a lot longer than you'd have thought, mostly in industrial environments. Marc > On Sep 4, 2018, at 7:54 PM, Tim Riker via cctalk <cctalk at classiccmp.org> wrote: > > Someone on this list, I don't remember who, asked me if I was interested > in this, and then dropped it off. I've not gotten around to doing > anything with it, and I could use the space back. If anyone is > interested, holler. > > HP 2250 Measurement & Control Processor > > Pictures are the same ones that came with it. Photographer unknown. > > https://photos.app.goo.gl/XjEj8E8vQ8KX9xcg8 > > If your interested in picking it up, email me directly, please. If you > have more information to share, respond to the list. :) > > If anyone knows more about what this is, I'd be interested to hear. > > I got these links from Mike on the SIMH list: > > http://www.hpmuseum.net/display_item.php?hw=986 > > http://www.hpmuseum.net/document.php?hwfile=5124 > > http://www.hpmuseum.net/document.php?hwfile=4579 > > Mine is the "2250M" version. Apparently this heavy beast is "mobile" > because it has wheels on it. :)