missed the start of this thread, but:
NOTE: X-Window terminals were often crammed full of
memory (2 to 16meg
generally), usually SIMS. This often gets stripped first, even before the
surplus shop gets it.
they generally (always? think it's actually part of the system design on
some boxes) need a boot ROM to boot from a host system (maybe some sort
of binaries for the terminal held on the host server too?). I gather
that these ROMs were often purchased seperately from the terminal itself
(presumably several giving different configurations for a particular
terminal were on offer) and so you may have a terminal without the ROM,
in which case getting hold of one might be interesting...
cheers
Jules