Weird BiPolar ROM programmer

[Allison]

>
>Subject: Weird BiPolar ROM programmer
>   From: "Joe R." <rigdonj at cfl.rr.com>
>   Date: Thu, 20 Oct 2005 20:48:10 +0000
>     To: cctalk at classiccmp.org
>
>  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

I used to blast bipolar proms using switches and some ttl so yes it could 
be a simple sequential logic thing.

Allison