Recent content by BBtheEE

You're a bad influence, Doug...bad!! :D

Thanks, we'll see how it turns out. :) And of course we could! :D Actually, I think that's what we should do with a control panel like Rob's...that would be pretty slick!! I could do it with my control panel already but it wouldn't be near as cool. A couple of commands to write to the...

Sorry for the late reply. I wish I knew, but unfortunately, I don't. I asked my dad about it and he doesn't remember. If we can get the tape dumped, I suppose you could look at the loader for the tape and the SADEH1 program to see if they are the same. One of the things he "seemed" to recall...

Actually, I've thought about that. For parts of it, analog would be simpler, but I'm not strong on analog. A few years ago I was asked to design some TIA circuits (trans-impedance amplifier, I even had to ask them what TIA stood for! :D ) for a test chip. I hadn't touched op-amps since...

I've always assumed that you just boot the diagnostic tape, enter the octal code from the NUM column in the listing to some address for the test you want to execute, and hit run. That would be much simpler than a string search for the name. One of them, possibly number 0000 (not listed) would...

Regarding the Keytape, it was more than just a key-to-tape device. We had one connected to a printer and I could dump tapes to it. I was curious what was on all of these tapes we had acquired and it was common to find personal info like names and addresses (and presumably account numbers and...

Thanks Rob, and please thank Brian for us! The reason I was unsure about an IBM drive reading a Honeywell tape is that Honeywell sold options for its tape drives to be able to handle IBM tapes (see attached), so there must be some kind of incompatibility (but may not be an issue for our...

Regarding the tape drives, there was a control module for handling the reel motors, it wasn't as simple as letting the zone switches control them directly. The module has the switch (a kind of rocker switch) that Karl Malden uses to run the tape backwards in the movie, "checking the actuator"...

Rob, best of luck with the book...that would be pretty cool to be published! I guess it's all a matter of time and priorities (as it is with me as well). Hopefully the museum will let you look through their manuals. I doubt looking at the physical machine will be of much help but it would...

Ya, someone didn't know what they had and just duplicated another listing. I wondered why someone bought these as well (I thought it might have been you! but you would have told us :)). I doubt anyone else is trying to recreate a system or needs spare parts, so it must have been a collector...

Just saw some boards that sold on eBay while looking at IBM 360/370 control panels (one sold for $15K!). Someone mis-labeled these as IBM boards: https://www.ebay.com/itm/356794346920

Holy crap!! They have nearly enough equipment to build a functional H2040 system! :oops: https://collection.sciencemuseumgroup.org.uk/objects/co62720/honeywell-2000-minicomputer

I'm always on the lookout for Honeywell mainframe related stuff, which is probably how I found this project. Yesterday, I found this video clip from the Good Morning America show from July of 2023 that shows an H125 control panel, a tape drive (probably a 204-B8 or 204-B9), and an H200 console...

Nice! I did notice the "H-PI" on the boards, that was what gave it away. ;)

Nice lab setup you have there Rob! The configuration of the backplanes reminds me of the frames that housed the H3200 CPU and scientific unit that had a pair of backplanes stacked vertically. It should be easy to work on with all of that space around it too. Kudos on the boards too...very...