The U07 box sounds like the external drive for a Xerox 820 computer
system. There should be room for two full height floppies or a single
floppy and an 8 inch hard drive. They have 37 pin connectors if I
remember correctly.
However the floppy disk in it may be for a Xerox Star 8010 since it is
labeled Xerox 8000. I would not be surprised to have one of the
external drive boxes hook up to an 8010 Star but I do not remember a
external drive connector.
The second keyboard could be a low profile Xerox 820 II keyboard. The
original keyboard was clunky and they made a low profile one that was
much nicer. Both of these had 25 pin D connectors.
Could be a Xerox Star keyboard (for the 6085 series also and the extra
connector would be for the mouse. The mouse port is a D9 though from
what I remember. I can't remember if it is a D25 connector for the
computer though. I have one in storage but can't get to it now.
My bet is they are two pieces to a Xerox 820 computer and you are
missing the 3rd piece, the computer which is built into the monitor.
The connectors match up for that. The Xerox 820 was a CPM Z80 system
designed around the Big Board Computer from what I understand. The
Xerox 820 was my third computer system. Upgradable to a 16 bit 8086
and could run early MS-Dos besides CPM86.
--
Paxton Hoag
Astoria, OR
USA