I discovered these, what could be, prototype emulators listed on eBay and couldn't resist bidding on them. I was the only bidder and won, probably because they were in a bad state after being stored badly for some time.They were built by a company named Conlog but a search for this company found nothing useful.
I started with the larger of the two, marked as "MC6803/68HC11 EMULATOR" on the case, and removed some screws to look inside expecting to find it crudely made. Instead I found a plated through hole PCB with some later modifications and some pieces of paper stapled together and tucked inside the case. I was amazed to find the circuit diagram still left inside after all those years with additional information about the modifications that had been made. These documents can be read here.
The PCB drawing has "TEST ENGINEERING" marked on it so I assume that these emulators were created solely for in-house development and testing for their products. One of the drawings dates it from 1990. The ribbon cable has a connector which must ultimately connect to another cable and/or DIL plug which are missing. There are holes on the underside of the case to allow access to DIP switches and an unlabelled 2764A EPROM with the window uncovered (I later covered it). After reading the EPROM contents it appears to be named "Debug03 V3.3" and the dump is here.
The second emulator has a smaller case which is difficult to get into and the PCB is not as well made and I assume that it is older than the other. It is marked "6805 EMULATOR" on the PCB and there is an EPROM marked "ASSIST05". This one has a ribbon cable with a 40 pin DIL plug still on it, protected by a 40 pin socket.
If anyone knows about Conlog, their products or these emulators please contact me.
Update
I have been contacted by Jason who has told me that Conlog still exists and is based in South Africa. I had previously googled for "conlog" and found this company but I did not think it was relevant as I had bought the emulators from someone in the UK. See here for further information about ConLog products in the 1980s and 1990s and how they inspired Jason to be an electronics engineer.
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