Ken Shirriff

No longer active on Twitter.
Bsky: @righto.com; Mastodon: @[email protected]

[Ken Shirriff @kenshirriff]

I've decided to step back from Twitter for a while. I don't like its recent political direction and would rather not participate here.

[Ken Shirriff @kenshirriff]

@mhaeberli Yes, that chip. I forgot that there are other purple-and-gold chips on the board.

[Ken Shirriff @kenshirriff]

This pretty chip from 1981 helped connect an IBM mainframe to data-entry terminals. 1/14

[Ken Shirriff @kenshirriff]

@shauntremayne I can't tell what fab the IBM chips come from. The chips have a plant code like "IBM 22" but unfortunately it's unclear what location is represented by the number.

[Ken Shirriff @kenshirriff]

Thanks to @bitsavers for providing the chip as well as reference material and photos. 14/14

[Ken Shirriff @kenshirriff]

A few years ago, I looked at a processor chip from IBM's follow-on 3174 Establishment Controller and made a brief thread.
https://t.co/4xgIB2fLfp 13/14

[Ken Shirriff @kenshirriff]

The processor from an IBM 3174 Establishment Controller (1988).

[Ken Shirriff @kenshirriff]

@joumajnouna Very interesting thread! I'm always happy to see people taking the time to do real research on Twitter. Not to mention your spectacular photos too.

[Ken Shirriff @kenshirriff]

@pickover I never thought of ∉ as an unusual symbol. Lots of books use it:
https://t.co/lqGJsOTcVn

[Ken Shirriff @kenshirriff]

@jeriellsworth Did I miss something new? It's so hard to keep up.