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Vintage
(lemmy.world)
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this post was submitted on 12 Aug 2025
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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.
Cool! I had no idea it was deeper than just a physical interface change.
I'm wondering, is it still the case for mobos with Super IO?
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.
I didn't know the PS2 had a keyboard
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
And having to pick your IRQ when installing anything into your machine, and the weird bugs that could happen if you mucked it up.
I remember manually programming the cylinders and heads on a hdd into the bios. Kids these days got it easy
I had a little book with the settings for almost every brand and model of hard drive that existed when published.
And when the bits feel off the end and you had to wind them back on with a pencil.