this post was submitted on 12 Aug 2025

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Programmer Humor

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Vintage (lemmy.world)

submitted 1 year ago by ekZepp@lemmy.world to c/programmer_humor@programming.dev

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[–] cheet@infosec.pub 48 points 1 year ago (9 children)

PS2 keyboards use interrupts rather than polling in USB, meaning every time a key is pressed the CPU stops what its doing to process it.

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[–] mfed1122@discuss.tchncs.de 8 points 1 year ago

Cool! I had no idea it was deeper than just a physical interface change.

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[–] Drewfro66@lemmygrad.ml 6 points 1 year ago (1 child)

I didn't know the PS2 had a keyboard

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[–] SparroHawc@lemmy.zip 8 points 1 year ago

I know you're probably being facetious... but the PS/2 port is what's shown in the OP image.

that said the Playstation 2 had USB ports, you could just plug a regular keyboard into it

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[–] drath@lemmy.world 5 points 1 year ago (1 child)

I'm wondering, is it still the case for mobos with Super IO?

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[–] dan@upvote.au 4 points 1 year ago

Super IO does still use interrupts as far as I know. The PS/2 protocol is interrupt-driven, so it's not possible to use a PS/2 keyboard or mouse without interrupts.

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[–] Deebster@infosec.pub 1 point 1 year ago (3 children)

And having to pick your IRQ when installing anything into your machine, and the weird bugs that could happen if you mucked it up.

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[–] Taleya@aussie.zone 5 points 1 year ago (2 children)

I remember manually programming the cylinders and heads on a hdd into the bios. Kids these days got it easy

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[+] obrien_must_suffer@lemmy.world 2 points 1 year ago* (last edited 1 year ago)

[deleted]

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[–] Deebster@infosec.pub 1 point 1 year ago

And when the bits feel off the end and you had to wind them back on with a pencil.

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