cross-posted from: https://lemmy.dbzer0.com/post/63890756
USB -> Serial -> Parallel -> Serial -> Serial (25 pin -> 9 pin) -> PS2 -> Serial (??? not sure) -> USB
Or in short USPSSPSSU adapter. Nice.
this post was submitted on 16 Feb 2026
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Not sure if you’re naming an adapter, or badly trying to coerce a cat to come closer.
Por que no los dos? 🤷
PS2 -> serial seems correct, iirc their were serial mice.
Is that a USB to USB adapter?
What's the transfer rate on that monstrosity?
0 since it's connected to a PS/2.
that green part is a ps2 to usb keyboard adapter that Microsoft provided with their keyboards at the time
edit: dang, replied to the wrong comment. meant for it to be the @db2@lemmy.world
I still have 2 of those 🤣 it was a joke
That's not a PS/2, those didn't come in laptop form. Maybe a Toughbook.
PS/2 refers to both a type of IBM PC, and a type of port.
Did they make a PS/2 without that port?
I dunno about that, but the port was popular in all types of machines in the late '90s and early '00s
And it's still superior to USB for keyboards.
Probably 0.
At most.
It wouldn't work, at all.
You've got USB to db9 serial, to db25 female, back down to db9 serial. At this point, since the chain started life as a USB to serial adapter, this should be a functional serial port.
But then, it gets converted to PS/2 mouse. Then to AT keyboard, then back to PS/2 mouse, before becoming a USB port again.
That's not how it works.
You see, he should have just plugged the dongle directly into the usb port on the laptop.
So you're saying it's now gigabit Ethernet.
Do any of these adapters actually do any signal processing / transformation? I always assumed they were simply wiring crossovers. But I guess when the number of pins change there has to be an IC in there somewhere?
That first USB to db9 cable does something, the rest are glorified jumpers.
Yeah so now I’m wondering if jumpers stand a better chance of making this work, accidentally. If I had more time I’d look up all the specs and see where the wire maze lands!
It's DE9, just because my mind won't let it go.
Elite ball knowledge.
0% chance this works at all.
Would anything work, even a keyboard or a mouse?