Thanks for the back story about "Bernie S paid a visit" and the computer brought to the repair workshop "for Dmitry". So now that Dmitry has the back story, what's his/her plan for the remains? It would be nice from my view, if the computer remains could at least be physically reassembled to preserve some kind of history of that kind of construction. I don't think they can be made to work again, nor need they be in my opinion. (The Apple II clone is in another, later category but of the same kind.) But if Dmitry plans to just use the parts - which is of course up to them - then it's good to have preserved the narrative and technical history at least. I have a Web site for the stories and tech I preserve. For those who think this looks awful, well, this is how we built microprocessor computers at home. In the earliest days, there just weren't' any "computers" to build, just micro processors or at best $1000 development systems or $300 development boards. In the mid-1970's, you could buy a *new car* for a few thousand dollars; $300 was an apartment's monthly rent. And, there weren't many single-chip functions - like "a floppy controller chip". So one board equaled one function. And floppy drives were expensive too. Most early computers used either paper-tape, or cassettes. And that worked fine for the small programs in use. These weren't built for looks, they were built for function. Many of the builders were learning as they went. Some were designing as they went, and as new chips became available. Getting them to work was an achievement. So, in my experience from the era: the 6502 computer when built, was an example of the time, early and certainly not common. The Apple II add-ons, was a thing that some people did, building on an available computer board. Using an 8-track drive for data is kinda scary, but it's a plausible extension of cassette data drives. But, once microcomputers got relatively affordable or were "cloned" cheaply, these hand-wired computers got shelved. When the technology advanced, these became less and less "functionally useful". So most were parted out or dumped. Since they were all unique, and didn't have that mass-produced designer look; they became cryptic, unfamiliar. That's why you don't see them much today, 40 years later. And time passed, is why work like this needs an explanation. Regards, Herb -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT comcast DOT net