@tubetime WOWWW

@tubetime

"I'm in marketing"... yes we can tell.

@tubetime Surely thats the D or ete key…

@tubetime M'dlete

@tubetime now I want a DELORT keycap.
https://www.youtube.com/watch?v=JidRZSpmIdQ

@shanselman Was MS-DOS 3.x ever released? When can we expect 5.x and 6.x?

Can we ever expect 7.x and 8.x? 😅

@shanselman cc @freedosproject

@shanselman Now we just need Windows XP… anything to help out #ReactOS become more stable!

@tubetime https://www.youtube.com/watch?v=mDhNQPt8An0

@tubetime The DS5002 was used for the suicide mcu in Gaelco arcade hardware. https://mamedev.emulab.it/haze/2017/07/17/ds5002fp-dumping/

@tubetime that's a cool logo

@tubetime both neat and an absolute preservation nightmare

@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/