i'm learning so many things about PS/2 keyboards and mice and literally every single thing about them is incredibly poorly designed
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either 1) mouse/keyboard that supports both protocols or 2) an active adapter that has an USB host/PS/2 device inside
I don't think the latter exist. Even today, USB mice/keyboards very often are still PS/2 compatible. Back in the day it would've been a hilarious waste of money to make active converters like that.
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It's even the only way to get N-key rolllover on many modern keyboards, because it turns out the USB keyboard boot protocol was designed by idiots and limits you to 6 keys, while PS/2 doesn't.
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I vaguely recall seeing (2) but I'm not actually certain they exist.
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It appears that some obscenely expensive ones do exist https://www.cdw.ca/product/black-box-usb-to-ps-2-converter/5228385 … Though I've only ever seen the opposite (ps/2 to usb) in person.
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they do exist. I have a single one. But yeah, very rare…
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I'm really curious about what's inside one of those. Did they ever make microcontrollers with a USB host back then? Dedicated IC? How much of USB does it implement?
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