Weird BiPolar ROM programmer

[Joe R.]

  I was out today and found an interesting looking box made by Aydin
Controls. It looks like a BiPolar PROM programmer. It has two 8 pin ZIP
sockets marked Read and two others marked Program along with several LED
diplays (TIL 311s! :-) and a lot of switches and pushbuttons on it. It
looks old so I decided to open it up and see what kind of microprocessor it
had in it. However I couldn't find one! It has four AMD 2101 RAMs, twelve
TIL 311 displays, a COM 2017 UART and a COM 5016 baud rate generator but
everything else looks like standard 74xx TTL. I couldn't find anything that
looked like ROM, PROM, EPROM or a CPU. Is it possible that this thing is
all controlled by TTL logic?   Has anyone ever seen anything like this
before?  FWIW most of the ICs are dated 1982 so I guess it that's when it
was made.

   Joe