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Hi Joe, I cannot thank you enough for your reply, very helpful for identifying the components in my system! I think you might be right about that, there are multiple cables that leave the computer and terminate in a telephone connector, however the modem itself is missing, so the opposite ends...

That sounds good, I'll look through those, thanks! I've also dropped John a mail in order to get the pics uploaded to the database.

Hi, About a year ago I acquired some unlabeled prototype chips from east German production. I worked at an experimental fab until recently and they let me use the Olympus Semiconductor microscope to take some high resolution die shots of them (which I unfortunately had to compress quite a lot...

That seems like a good idea, I’m currently not where the machine is but I‘ll try it out later.

It unfortunately doesn’t seem to have one. I’ve also tested the track zero IR LED and photodiode, those seem to be fine.

Hi! I recently acquired a crippled micro-11, a Professional 350. It powers up fine but stops at 000400 000007 (EMT trap or required file not found) which leads me to believe the hard drive has either been wiped or is dead. Now to my actual issue: When I try to boot from a floppy I get the...

So there it is, my first mini, a Nixdorf 8870 Quattro /25 system. It came from a car dealership where it seems to have been used to control the gas station, at least according to the service logs, which also state that the computer was installed in early 1988. The lot included an external 8“...