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The good old days (sub.wetshaving.social)

submitted 2 months ago by weird@sub.wetshaving.social to c/linuxmemes@lemmy.world

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[–] atomicbocks@sh.itjust.works 32 points 2 months ago (1 children)

The other commenter is on the right track but the chip controls both USB and PS/2 as well as others;

In the 90s and 2000s, for x86 machines, slower I/O was handled by a chip called the Southbridge which worked in conjunction with a chip called the Northbridge that handled faster I/O like IDE and PCI. Later these were integrated into a single chip and, as of recent processor generations, into the processor itself.

AFAIK ghosting and key rollover are issues when using PS/2 but it can offer some milliseconds off latency when used in high cpu games.

[–] DeRp_DaWg@lemmy.world 10 points 2 months ago* (last edited 2 months ago) (2 children)

AFAIK ghosting and key rollover are issues when using PS/2

I think it's more of an issue for USB keyboards than PS/2 keyboards.

[–] herrvogel@lemmy.world 18 points 2 months ago

They are wholly independent from the protocol or interface. Ghosting is an electrical issue that is a result of keyboards being a bunch of switches arranged in a matrix. It makes the keyboard's controller register an extra keypress in certain conditions. Nothing to do with how the thing communicates with the host computer.

Key rollover issues can be related to ghosting. The limit for it is once again the keyboard's design at the circuit level, not its communication protocol.

Really they're both related to how cheaply built the keyboard is. That's the only thing.