in contrast, the 74LS471 is a 2048 bit PROM (arranged as 256 x 8 bits). looks like i can program it using my Allmax programmer!

@tubetime Given that 1983 date code I wonder if that chip was on my Hayes Micromodem IIe in my Apple II.

@tubetime
Could use it for a Kansas City Standard tape interface though?

@tubetime Very nice. I've got a couple Tranz-330s in the stockpile for keypad and VFD reaping... They've got 73K224Ls in them that I believe handle Bell 103. We could have them fight...

see, over the past few days i've been sorting through a *ton* of chips that i recently got. and, as it turns out, i actually *have* several of the truly strange devices in the 74xx family. so let's take a look!

at the start of the year i figured out how to boot MS-DOS on my Apple II.

https://mastodon.social/@tubetime/109679227812726996

@tubetime don't like that

@tubetime
It's pretty clear (and he acknowledges near the end) that any effect is probably due to mechanical deformation.

It would have been simpler just to measure continuously while crushing one in a vice.

@tubetime gravity

hmmm!

@tubetime Getting out of the ARM business once again. I wonder how long it will last this time.

@tubetime interesting, though I don’t get why you’d buy a company and then put it out on its own.

@tubetime spin off the FPGA unit? Spin off? Like in a Cyclone?

I'll get my coat 🧥

one of the pins fell off so I carved away part of the encapsulation and soldered it back on

it....

works...

🎉

@tubetime That power supply definitely looks like stick of C-4 that some hero cop (recently recalled from retirement to save the day) is trying to disarm in a movie from ~the early 00s.

Just sayin'

@tubetime the hell is that card in slot 5?

@tubetime @awlnx The captain also wrote a book about this flight that is a very interesting read: https://play.google.com/store/books/details?id=mbDl7plG7RMC

@tubetime Thanks for sharing this — I had to read it in two sessions (with a commercial jet flight between!) but this was a great read

@tubetime
Oooh. I sense a new episode of MayDay coming.

Great show, the audience gets to play Guess The Failure Mode from the comfort of home.

"I can Guess The Failure Mode in 5 minutes Alec! "

https://en.m.wikipedia.org/wiki/Mayday_(Canadian_TV_series)

@ct_Magazin das könnte doch für euch was sein 😁

@tubetime you mean like this one?

*points at https://pinoutguide.com *

@tubetime Brilliant. This kind of stuff is why we built the internet.

@tubetime Am I the only one concerned with that it appears a GIF viewer is used as interface to a SCADA system?

@tubetime it's got thicc scroll bars though - very user friendly to be able to see the current position in the document.

@tubetime to be fair it *does* look like someone spent exactly NO TIME on the design...
😅

@tubetime Some people are just barbarians.

@tubetime you monster

@tubetime *rolls around in pain*

@tubetime the Noise of Art and not The Art of Noise? https://en.m.wikipedia.org/wiki/Art_of_Noise

@tubetime wow!

@tubetime is that an art of noise album? Or someone copying the style with the ds3?
#IchBinEinSynthNerd

found this https://web.archive.org/web/20140912083725/https://ps-2.kev009.com/pcpartnerinfo/ctstips/252a.htm which says i need to copy some files over from the reference disk. hmmmmmm

@tubetime That error code is mentioned in http://webcache.googleusercontent.com/search?q=cache:AIUF3kbmvokJ:annex.retroarchive.org/cdrom/pier-05/036/INSINF/INSTALL.TXT

@tubetime I think that's the error that gets thrown when there's a Prime Directive violation. OS/2 2.0 is a pre-Warp civilization 😛

@tubetime So this is how I find out :o...

@tubetime 48 layers! How thick is that board?

@tubetime Allegro (and Cadence? Schematic capture) was my first tool for making professional PCBs. It was what Sun used for hardware design. Eventually learned Eagle so that we could do more in our department "under the radar". Our Allegro "tape out" had to go through a PCB department and generally had long delays whenever hotter projects had priority.

@tubetime I can still remember laying out boards at 2x or 4x scale with semi transparent red and blue tape. Yes, really.

I should get a colonoscopy - oh I forgot I already did.

@tubetime Impressive that it can manage to be both wildly distasteful and anti-competitive.

@tubetime I’m fascinated by some of the specifics in this ad. They had just moved to AZ (from NY). The logo (there’s an extra notch in the m) and the device they’re advertising doesn’t exist. To my knowledge, this is pre-PIC16.

@tubetime they may actually be serious, the logo does kind-of look like two pistols.

@tubetime What non-techy things are you interested in? And no, a site run by a good friend of and supporter of Elon that Elon is invested in really isn't it. It might be ok now but how many corporate communities in the last couple of years have absolutely turned on their residents? Etsy, Bandcamp? The implosion of Tumblr? And also I would miss you.

@tubetime

IDK I've found a lot of non tech people here. It's important to follow a lot of people here to get a real sense of what's going on.

But, yeah, what sort of things are you looking for?

@tubetime only use this for the few who haven't set up shop on blue Sky. but I have abandoned mastodon for the most part.

hmm, storage module...

@tubetime I have one of those from the 6600 at NYU. It was a very cool machine.

@tubetime Did you see how some memory modules were constructed? I would hate to have to deal with these rope memory modules in any way, shape, or form...
-- https://www.youtube.com/watch?v=hckwxq8rnr0 --

That said I had an old mini-mainframe things 30 years back that actually had a few cards of plane ferrite core memory and it used to dim the lights in my place when it turned on, and then again when loading/reading the memory. Quite surreal...