@tubetime grandmother in a chip?

@tubetime Oh wow, I went through multiple comprehensive manufacturer logo lists, even a russian one, and could not find it. This is some really obscure stuff!
But yeah, I bet that it behaves like a OPA211 from TI

@tubetime it looks almost exactly like Telecom Eireann's logo, backwards.

https://www.flickr.com/photos/ajcarr/536570712/

(TE was the national telco of the Republic of Ireland)

@tubetime that sure looks like the Heathkit/Zenith product code system

@tubetime I miss the days when computer peripherals had CPUs nearly as powerful as the main computer :D.

@tubetime
Its a picture of a C64 keyboard in a 1541 floppydrive. Bad ai?

@tubetime That picture makes my brain hurt...

@tubetime There's no switches :o...

@tubetime 9 chips per column, does it have parity?

the chip pins are crimped. this is a huge pain even with the super nice desoldering tool (FR-301)

a box full of 8-bit ISA RAM cards! I picked up a few for a uhh project

@tubetime I love these posts. When I lived in the Bay Area I had no space for collecting fun old stuff, sadly and/or thankfully. I only made it to a couple of the flea markets just to look around.

@tubetime
so ... this would be the nefarious MM5204Q chip that can single chip-handedly solve ALL the world's problems. rumor had it that the chip had been secreted away due to overriding interests.

@tubetime oh, german? :)

@tubetime Had to look that up. 512x8 EPROM.

I think the smallest EPROM is worked on was 2k x 8.

Also, that die attach is very sloppy looking by modern standards.

hmm the die says it is the MM4827.

@tubetime https://www.digchip.com/datasheets/quote.php?action=search&pn=MM58274D

Real time clock.

hmm could be a dual driver or comparator. it's got two beefy output stages. I don't see any compensation capacitors so I don't think it is an op amp.

@tubetime

Do you know already or were you asking?

It’s a 16-pin EEPROM, newer MB series are/were marketed as FRAM being faster and having greater flash cycles than traditional EEPROM but given that package it’s probably first gen FRAM or last gen EEPROM.

@tubetime This is a custom chip used, for instance, in SONY VO-5850P. Below is an excerpt from the service documentation for VO-5850P:

@tubetime Somehow Sony managed to make even their chips look like designer objects of the 80s. It's beautiful! 😍

@tubetime How is it that Sony can make even their microchips look premium? lol

@tubetime Have you found any cross-reference of TA to production numbers? I only know of about half a dozen.

@tubetime telephony stuff? Edit: no, does not really match ss5.

Decoding artifacts due to the internal gates?

@tubetime Would have been extra funny if they just had exchanged 11 and 12 codes!

@tubetime I remember some old Skee-Ball machines displaying "HEL" on the score counter and "P" on the balls remaining digit to indicate that they had run out of tickets and still owed some to the player

@tubetime I had to look up what that was, and... I guess I should have guessed, but still, weird packaging!

@tubetime
Initial thought: only 408 pages? That's shorter than I expected.

Subsequent thought: it's part one of three, selected through the sidebar thingy. Blimey!

(So many amazing illustrations...)

@tubetime
*loudest produced subsonic jet airliner

There were several louder aircraft.
Definitely the Thunderscreech
Almost certainly the Tu-95 and Tu-114
Maybe the Cessna Tweet

@tubetime man, this kind of stuff should be required for all software systems…

Don't modern mobile SoC packages do the same thing but as BGA and for a RAM chip?

@tubetime

Fairchild "borrowed" a microprocessor design from a typewriter company 🤷‍♂️

Some brief history here: https://www.eejournal.com/article/a-history-of-early-microcontrollers-part-6-the-fairchild-f8-and-mostek-mk3870/

@tubetime regular ceramic, or the toxic high heat dissipation military-grade stuff?

@tubetime It's so that it's more convenient to sharpen knives on them!

@tubetime almost thought that was a z8000

@tubetime Rebadged 8051! Everybody drink!

j/k, I have no idea.

@tubetime This is a weird one. Only pops up with a lot of aviation related hits, but NOTHING specific, let alone a spec sheet or something.

Edit: Found something on a Russian parts site where it is listed under i/o relay modules.

@tubetime how was an Intel 80186 chip packaged?

@tubetime TI — we can even make gold rust!(tm)

@tubetime IMP-48 and SMP/80 seems interesting 70‘s home computer monitor stuff.

@tubetime you realise the world will end because each and every one of those hasn’t got something covering the windows.

@tubetime
Wouldn't it have been better to cut the pin on the component side, and bend it up to attach the signal wire to?

@tubetime "Smallest coaxial"

@tubetime I'd just have cut those two little traces left and right, or is it connected to grnd on multiple layers?

Marc has a video about his technique. i tried it with one pen but it's a bit labor intensive, and a commenter on his video found a better way!

https://www.youtube.com/watch?v=h-oj4HrTH14

@tubetime Philip Freidin modifies a pilot? pen that happens to fit almost exactly. IIRC he takes a little shave off them in a lathe. Not sure what exact pen he uses. I suspect that gives you a lot longer use time, but then the long pen won't work on a carousel.

@tubetime know of a good source on how hook one up to a modern computer? I have a big old HP plotter but I’m not really sure where to start

@tubetime And we never recovered! (I say, as a person who first joined the Internet via AOL.)

@tubetime this is far worse, devoid of any value whatsoever, at least with AOL, you got tons of free floppies.

@tubetime Today's date is September the 11,161st, 1993.