one of the nice things about modern Computing is the move towards one port
for seemingly everything and yes I know that audio
monitors and Ethernet are major exceptions but since the introduction of
USB in 1996 we have come a long way from the
days when it seemed like every single device had its own specialized Port but
even so there's one crucial situation
where some folks still haven't fully embraced USB I'm talking keyboards and
mice while the vast majority of these
input devices sold do connect via USB
there's actually still a different connection that some people still use
the venerable PS2 Port so why do some people still prefer
these round green and purple 90
Throwbacks well although both PS2 and
USB seem to do the same thing connect a
keyboard or Mouse to your computer there are a number of significant differences
in how they work that make them still seem relevant even on high-end
motherboards you see a USB keyboard or
Mouse connection works by pulling your
device so in the computer equivalent of
Are We There Yet many times per second
your computer essentially asks your keyboard or Mouse hey what you doing
what you doing what you doing and the keyboard or Mouse will then respond by
saying for example nothing moving to the
left having my D key pushed down or
strangling my owner PS2 devices on the other
hand work by sending interrupts to the
system so instead of waiting around for
the computer to ask about its current state the PS2 protocol allows your
keyboard or Mouse to actively interrupt
whatever your CPU is doing to tell the computer what's happening and this might
sound potentially inefficient but because modern CPUs run at millions or
even billions of cycles per second you'd
never notice a Slowdown so it's for this reason that some enthus iasts claim that
PS2 has less perceptible latency which
should theoretically make response times quicker in games and PS2 also supports
true en key rollover meaning that the system will register as many keys as you
can push down at once there are USB
keyboards that also advertise this functionality but this is usually done
by emulating multiple keyboards which can limit how many additional input
devices you can connect by requiring special software or by suffering from
compatibility issues at boot time
because PS2 is a dedicated interface just for keyboards and mice PS2 devices
don't have weird issues where your computer doesn't recognize them properly
in the BIOS or before Windows loads drivers as can happen occasionally with
USB gadgets wow well that's a lot of
benefits Long Live PS2 right well hold
on in reality the virtually certain to
work level of compatibility is about its only real world benefit for most people
even many competitive Gamers have apped that whatever enhanced responsiveness
they get from PS2 is basically imperceptible with factors like key
switch type being much more important for a Competitive Edge and PS2 has other
limitations as well it wasn't designed to be electrically hot swappable and on
older Hardware trying to swap out a keyboard or Mouse can make it not work
until you reboot or even worse actually
damage your equipment and not only that
since they weren't meant to be unplugged and plugged back in frequently it is
easy to bend or even break the little pins at the end of the cable so in short
PS2 connectors take up more space and simply aren't as tough
as their USB counterparts so unless you
have a very specific need for PS2 it
technicians still love them there's really no reason to fear missing out on
anything if you just go with a USB keyboard assuming of course that you
don't have a classic Model m keyboard that uses it or you know maybe just a a
major old school IO fetish for like
those giant printer ports that we all
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