• Toes♀@ani.social
      701·
      3 个月前

      A bunch of those points about ps2 are no longer accurate, it’s emulated on modern computers.

    • Xenny@lemmy.world
      432·
      3 个月前

      Yeah but try pressing more than 4 keys at once on the PS2 keyboard and get back to me

    • trainden@lemmy.blahaj.zone
      17·
      3 个月前

      USB: Many designs and revisions, none of them perfect

      Nah, USB 3.2 Gen 2x2 SuperSpeed is the best! And it took me only 30 minutes of reading articles and wiki pages to get that information! although I’m not sure what USB4 Gen 3×1 is, but it’s only x1 so can’t be that good, right?

      • The_Decryptor@aussie.zoneEnglish
        4·
        3 个月前

        although I’m not sure what USB4 Gen 3×1 is, but it’s only x1 so can’t be that good, right?

        It’s the initialisation mode of USB 40Gbps, luckily not something users will have to deal with

    • JackbyDev@programming.devEnglish
      13·
      3 个月前

      I know this is a shitpost, but what’s interesting is that even though USB doesn’t directly interrupt the CPU it’s still faster. USB is able to get the entire packet sent before PS2 even sends one. It’s very interesting. So if you ever see anyone unironically saying there is less latency call them out!

    • dejected_warp_core@lemmy.world
      9·
      3 个月前

      Are PS/2 ports still operating on hardware interrupts these days? I would expect these to be emulated as USB devices at this point, depending on whatever I/O chipset is in play.

      The bit about USB asking the CPU is kinda true? My understanding is that it’s a packet protocol of sorts, so it’s really just writing post-it notes for each button press and leaves them on the CPU’s whiteboard for later.

      • JackbyDev@programming.devEnglish
        8·
        3 个月前

        Yes, it’s true the the USB protocol has to “wait” but it gets the message sent so much faster that it doesn’t matter. Still interesting stuff though!

      • VitabytesDev@feddit.nl
        14·
        3 个月前

        I recently bought a motherboard with a N100 processor, that had two 3.0 USB Ports, two 3.1 USB Ports, an HDMI and a DisplayPort. Because of that I was surprised to learn that it had also two PS/2 ports for a keyboard and a mouse.

    • GissaMittJobb@lemmy.ml
      7·
      3 个月前

      My mechanical keyboard came with a USB-to-PS/2 adapter, and I use that instead of the USB one. Feels good

  • 0p3r470r@lemm.ee
    591·
    3 个月前

    Same as VGA, shit just works, don’t need to worry about drivers or OS. So if your server shits the bed, you don’t need to worry about these things not working so you can can figure what went wrong.

        • YourPrivatHater@ani.social
          131·
          3 个月前

          Why? Nobody needs high definition from a server. Vega is literally unbreakable, super reliable and cost efficient. Display port would be a absolute waste just like HDMI. Same with most hardware applications that don’t need high definition displays. The server ports are literally only used to set up the server.

          This isn’t just a royalties issue, its a issue of necessity.

          • Starbuck@lemmy.world
            13·
            3 个月前

            IDK man, it would be great if my crash cart or KVM only needed one cable. I can’t wait for USB-C on servers to be everywhere

              • lud@lemm.ee
                2·
                3 个月前

                There is really no reason not too though. Displayport also takes up less space that would be used for cooling or whatever.

                The only reason other than compatibility is probably that the screws are nice to have if you hook it up to something permanently like a KVM. Displayport have latches but imo they suck and I usually buy cables without them.

          • Possibly linux@lemmy.zipEnglish
            7·
            3 个月前

            VGA is flaky and prone to issues. It doesn’t have a way of reliability relaying information such as display metadata.

          • fuckwit_mcbumcrumble@lemmy.dbzer0.com
            7·
            3 个月前

            Everything in the world is hdmi or DisplayPort. VGA is essentially now a specialty connector used only in data centers.

            HDMI has their fees, but DisplayPort doesn’t. Plus at this point implementing analog to digital converters is probably more expensive than just putting DP on it.

    • BorgDrone@lemmy.one
      6·
      3 个月前

      I don’t know what server you’re running, but I have never had any issues with USB keyboards. They just work, including in the firmware. No drivers needed. Besides, a proper server motherboard will have IPMI so you can just remote into it.

      • HakFoo@lemmy.sdf.org
        3·
        3 个月前

        I’ve had KVMs that don’t like the ‘fancier’ USB keyboards with NKRO. It would work, but it wouldn’t listen for its own ‘switch to different console’ hotkeys. Reconfiguring the keyboard to run in 6KRO-only mode addressed it, but not every keyboard can be configured that way.

    • m-p{3}@lemmy.ca
      6·
      3 个月前

      In a server environment it’s perfect. Have multiple baremetal servers in the rack?

      No problem, all you need is a PS/2 + VGA KVM and you can control them easily without fiddling. No protocol handshake, no HDCP in the way.

      • lud@lemm.ee
        3·
        3 个月前

        PS/2?

        I’m not completely sure but I’m pretty sure that at least the majority of our servers only have USB and no PS/2 port. And while our servers aren’t very old some of them still have a few years on them.

    • z00s@lemmy.world
      3·
      3 个月前

      You’ve just gotta dig out the mouse/keyboard combo that came with the Packard Bell you bought in 1996 from some dusty box in the attic / storage room at work

  • x00z@lemmy.world
    57·
    3 个月前

    If there is a fault in the PS2 device it literally breaks the rest of the computer.

    A little more than 15 years ago I had to fix my PS2 keyboard because it crashed everything. Not even a BSOD, just colors.

      • x00z@lemmy.world
        17·
        3 个月前

        No. It was when I was younger and I smacked the keyboard at some point. The whole computer crashed with random pixels all over the screen. I tried rebooting many times. I came to the conclusion the cable inside of the keyboard must have been slightly disconnected and pushed it further back into it, and my PC worked again.

        Computers are really resilient to permanent damage to be honest. I once dropped a screw into a running computer and it short-circuited with sparks and all. I was still able to boot it, but it was extremely slow. After a few reboots it was back to normal.

        • Zoot@reddthat.com
          2·
          3 个月前

          Your story reminded me of when I set my pc on fire!

          No idea how or what happened but the PSU shot sparks, lit up and tried setting the house on fire. Amazingly everything worked right after replacing the PSU, but the Mobo was the next thing to blow up.

          So while they are indeed resilient af, you’re likely not coming out unscathed if sparks fly.

          • x00z@lemmy.world
            1·
            3 个月前

            PSUs aren’t too hard to fix by yourself if you know your electronics.

            Except maybe that one PSU I got for free that had safety stuff bypassed.

            But yeah, a fire might be a pushing the limits.

    • Revan343@lemmy.ca
      2·
      3 个月前

      If there is a fault in the PS2 device it literally breaks the rest of the computer.

      That must be OS dependent

  • MerchantsOfMisery@lemmy.ml
    53·
    3 个月前

    My keyboard uses PS/2 and although I do have a PS/2 to USB adapter, i prefer using my computers PS/2 port because it means one more USB port can be used for something else.

    30+ years old and it runs flawlessly.

    • Dexx1s@lemmy.world
      17·
      3 个月前

      Isn’t almost any keyboard able to last that long?

      I make sure any motherboard I buy has at least 8 USB ports, so I know I’ll have enough. It does make sense to use the PS/2 port if you have the peripherals. What advantage does USB have over it anyway?

      • vortic@lemmy.world
        121·
        3 个月前

        I go through a cheap Logitech keyboard just about once every three years. I replace them when a a couple of keys stop working or when the nubs wear off of the center keys and can no longer blindly find where my hands go.

      • MerchantsOfMisery@lemmy.ml
        9·
        3 个月前

        Isn’t almost any keyboard able to last that long?

        In theory, yes. In reality… not so much. Bluetooth keyboards are a joke for longevity, and a lot of wired keyboards these days just have piss poor build quality.

        I don’t think PS/2 inherently has major advantages over USB but as someone who uses a small PC with few USB ports, I appreciate having a PS/2 port available.

        • vaionko@sopuli.xyz
          5·
          3 个月前

          I had a Razer Blackwidow keyboard, lasted only like 6 years before the switches started dying. Or it got into a cult. Sometimes pressing k would type out kkk.

      • offspec@lemmy.world
        22·
        3 个月前

        Usb keyboards can have n-key rollover which let’s you press more buttons simultaneously, whereas PS2 has a hard limit of like 5 or so

        Refer to below comment

        • drathvedro@lemm.ee
          3·
          3 个月前

          It’s actually the other way around. Check out Ben Eater’s awesome videos for technical details.

          TLDR: PS/2 sends separate key up and key down events, sequentially - like #1 Down - #2 Down - #1 Up - #2 Up - each in separate message, allowing for theoretically infinite rollover (excluding certain edge-cases). USB, on the other hand, polls only for keys being pressed at the moment. By default, the keyboard responds with a 8-byte message, with 1 byte being the bitmask for 8 modifier keys (4 on each side), a spacer, and 6 bytes/slots for identifiers of keys being held down. If one identifier is present in one response but is missing or replaced in next one, the system assumes a key-up event. It is possible by USB spec to negotiate connection in such a way that the keyboard responds with a bitmask for every single key it has. But this is not well supported by things like BIOS and KVM’s, so very few keyboard manufacturers bother implementing it. Most keyboarrds advertising NKRO are actually only capable of doing so via the PS/2 adapter.

          • JackbyDev@programming.devEnglish
            1·
            3 个月前

            There are proper NKRO USB keyboards though. The packet sort of reminds me of a piano. Each key has a bit that says if it is pressed or not.

    • Jimmycrackcrack@lemmy.ml
      4·
      3 个月前

      I’ve often thought this about older or less generally useful ports, but then it just keeps coming back to the fact that, if I had the same number of spare ports, plus one more USB that I useD for this keyboard instead of a dedicated PS2 or an old USB 2, I’d be in the same situation but with at least one more useful and fast USB that maybe I might for some reason want to use without my wired keyboard plugged in.

      It makes sense in terms of cost, because the older more narrowly useful port is hopefully cheaper, but otherwise it’s just unnecessary and more limiting than the same overall number of ports where all of them are the most widely useful and fastest possible throughput.

  • fin@sh.itjust.works
    29·
    3 个月前

    I actually use a keyboard with that connector with a converter ( to USB ). It works pretty well.

    Fyi, I’m using a very old happy hacking keyboard my father gave me

    Here’s the picture of the keyboard I found on the Internet:

  • Jocker@sh.itjust.works
    23·
    3 个月前

    Hahaa… laughed at this, checked my computer only to see my keyboard is using this… It didn’t at all bothered me all these years, so… Long live

  • leadore@lemmy.world
    231·
    3 个月前

    I’m glad to have it. I have to keep my old PS/2 keyboard plugged into that slot so I can get into the BIOS. My USB keyboard isn’t recognized until it’s too late to interrupt the boot process.

    • hunter@sh.itjust.works
      21·
      3 个月前

      I had the same problem until I learned motherboards tend to prioritize the top usb slots or specific ones for the boot process. Switching to those fixed it for me. Any such luck?

      • leadore@lemmy.world
        2·
        3 个月前

        I did try that but unfortunately it didn’t work on my system. There is also an option for the systemctl reboot command that I haven’t tried yet but plan to next time I need to get into the BIOS. IIRC it’s --firmware-setup. It’s supposed to reboot you into the BIOS, but whether it works or not depends on if your hardware supports it.

        • riodoro1@lemmy.world
          2·
          3 个月前

          I think if your bios doesn’t recognize USB peripherals it’s not gonna be UEFI compatible.

    • Blackmist@feddit.ukEnglish
      7·
      3 个月前

      I had to mess with an old laptop the other month, and the built in keyboard didn’t activate until after the deadline for getting into the BIOS.

      But plug in a USB keyboard, and away it goes.

      Like, who designs this shit?

  • greyfox@lemmy.world
    English
    19·
    3 个月前

    We asked our Dell sales guy this question years ago now, when they had been removed one year and quickly added back the next year.

    They are there mostly for government builds, and other places with high security requirements. Usually the requirement is that they need to prevent any unauthorized USB devices from being plugged in. With the PS2 m&k ports they can disable the USB ports entirely in the BIOS.

    • ByteOnBikes@slrpnk.net
      4·
      3 个月前

      That makes sense! The convenience of USB means that this single point of entry is now a critical security risk.

  • abbadon420@lemm.ee
    18·
    3 个月前

    So you want to connect your mouse and keyboard, but all your usb slots are taken? I got your back, fam!