AT&T XPC Tutor?

One of the very few goodies (I rarely partake in the stuff that comes through the VCF, preferring the attendees to get the good scores, if they can get to it before Hans) I ended up with from the VCF (thanks, Stan!) is an AT&T "XPC Tutor". It's basically a microprocessor trainer of some sort, circa 1986. The main CPU(?) inside is a very odd chip labeled thusly: AT&T M T7102-NC 11 86 77 I thought at first this must be a Hobbit chip but it's too early (assuming "11 86" is the date code, which would seem likely based on the date codes of all the other ICs) and nothing comes back from Google. Does anyone have any idea what this might be? The other interesting thing about this trainer is that it has a 6809 in the middle of the PCB, and it has 6 serial ports (or at least 6 DB25 connectors with several wignal lines each) poking out the back. I'll post a picture if it'll help jog a memory. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]