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Pippa
@philcowans@universeodon.com  ·  activity timestamp 3 days ago

Let me add a bit more detail on how this works. The #ibm7094 (specifically the one in the #MIT Computation Center which ran #CTSS) had a hard disk which was used for working storage. My understanding is that the preferred way of working was for users to enter files directly into the system via a teletype terminal, but the system did also have a card reader and multiple magnetic tape drives.

I don't think CTSS provided a friendly way for users to initiate loading from cards (although I'm not sure what there really was in the way of access control for the hardware if you were willing to write your own code). I suspect you wouldn't have had physical access anyway, so you would have had to have worked through the admin staff.

In practice, you would have done this by submitting a job. Jobs covered various I/O tasks, e.g. bulk printing, and for the most part could be submitted through an OS command (which wrote to a special file in the user's home directory). The one exception to this was card input, as that required the physical cards to be submitted to a helpdesk. Those cards were bookended by a metadata card (specifying the user and output filename) at the start and an EOF card at the end. In theory all of the job types could be submitted in the same way - except the 'deck' in those cases would just be the metadata card (and in fact the REQUEST in the users home directory was just an online representation of the same cards).

#retrocomputing #ibm #mainframes

1/n

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Your spooky 'net denizen
Your spooky 'net denizen boosted
Michael Engel
@me_@sueden.social  ·  activity timestamp 4 weeks ago

New semester, new version of the xv6 educational OS for RISC-V from MIT! This is accompanied by a new revision 5 of the xv6 book and–for the first time, I think–a Lions' Commentary-style code reader booklet!

A previous version switched to using the stimecmp extension instead of the regular CLINT timer, that was a bit of a surprise. So let's see what the changes in this new version are...

https://pdos.csail.mit.edu/6.1810/2025/xv6/book-riscv-rev5.pdf
https://pdos.csail.mit.edu/6.1810/2025/xv6/xv6-src-booklet-rev5.pdf
https://github.com/mit-pdos/xv6-riscv

#xv6#MIT #riscv #unix #johnlions

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Michael Engel
@me_@sueden.social  ·  activity timestamp 4 weeks ago

New semester, new version of the xv6 educational OS for RISC-V from MIT! This is accompanied by a new revision 5 of the xv6 book and–for the first time, I think–a Lions' Commentary-style code reader booklet!

A previous version switched to using the stimecmp extension instead of the regular CLINT timer, that was a bit of a surprise. So let's see what the changes in this new version are...

https://pdos.csail.mit.edu/6.1810/2025/xv6/book-riscv-rev5.pdf
https://pdos.csail.mit.edu/6.1810/2025/xv6/xv6-src-booklet-rev5.pdf
https://github.com/mit-pdos/xv6-riscv

#xv6#MIT #riscv #unix #johnlions

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The Japan Times
@thejapantimes@mastodon.social  ·  activity timestamp last month

Research shows the ease with which artificial intelligence can manipulate people into remembering things that never happened. https://www.japantimes.co.jp/commentary/2025/09/04/world/artificial-intelligence-lies/?utm_medium=Social&utm_source=mastodon #commentary #worldnews #ai #artificialintelligence #deepfake #loftus #mit #ucirvine

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Digital Mark λ ☕️ 🕹 🙄
@mdhughes@appdot.net  ·  activity timestamp 2 months ago
@ramin_hal9001 Corpos already steal copyrighted text & code with LLMs, they don't care about the license at all.

BSD isn't to protect my code from ever being used by a corpo, which I know can't be stopped. It's to make it convenient for other people to use. I care about the teams of ONE or TWO who want something.

I can't use GPL shit, unless I make everything GPL. Or AGPL. Or v2 or v3. Or LGPL. Can I link to the proprietary library I need? NOPE.
#bsdlicense #bsd #mit #mitlicense #gpl

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alcinnz
alcinnz boosted
Alfred M. Szmidt
@amszmidt@mastodon.social  ·  activity timestamp 3 months ago

Someone should write some #MIT#CADR microcode and supporting code to make it possible to run #Interlisp / #Medley on the #MIT#LispMachine#LispM

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Alfred M. Szmidt
@amszmidt@mastodon.social  ·  activity timestamp 3 months ago

Someone should write some #MIT#CADR microcode and supporting code to make it possible to run #Interlisp / #Medley on the #MIT#LispMachine#LispM

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