PS/2 ports: finally dead?

[R-T-B]

I think the whole USB not working thing is overstated.

It is unless you are a pro-OCer tbf. And even then you are pushing questionable stability overclocks.

 

[Aquinus]

It is unless you are a pro-OCer tbf. And even then you are pushing questionable stability overclocks.

I was going to say, if USB can't operate at 1.1 or 2.0, then I'm questioning the stability of the machine.

 

[chrcoluk]

My tower doesn't have a PS/2 port and I've never needed to use it. In fact, I haven't used a PS/2 device in over 20 years. I think the whole USB not working thing is overstated.

Its overstated until you wish you had the port when the usb device isnt responding on the OS.

Basically you are deciding if something is overstated based on your own personal experience.

Never had an issue in windows, but sadly linux is a whole new ball game. I have come across all sorts of weird issues on linux machines related to hardware compatibility for cpu's, gpu's usb etc. They dont have the budget and access to hardware code that Microsoft do.

 

[ir_cow]

Best apart about ps2 ports is when you unplug it, the computer has to be restarted in order for it to work again. Ah the good old problems of winxp

 

[eidairaman1]

I only cared about using a ps2 mouse until BIOS got full support for USB. The 125Hz standard polling rate is way faster than the 60 hz PS2/2 stock .

The last time I had a PS\2 motherboard was 15 years ago!

It still has to contend with other traffic on the Universal Serial Bus.

PS/2 is still a more direct route

 

[80251]

Best apart about ps2 ports is when you unplug it, the computer has to be restarted in order for it to work again. Ah the good old problems of winxp

I thought PS/2 devices could only be unplugged when the system was off?

 

[The red spirit]

Best apart about ps2 ports is when you unplug it, the computer has to be restarted in order for it to work again. Ah the good old problems of winxp

It has nothing to do with Win XP, PS/2 isn't plug and play connector.

 

[defaultluser]

It still has to contend with other traffic on the Universal Serial Bus.

PS/2 is still a more direct route

And? when each USB port is it's own controller, you're not exactly adding noticeable delay going through zero USB hubs on the way to my mouse and keyboard.

I used to overclock my PS2 mouse to 100 hz, but I can't tell the difference between that and USB.

PS/2 is NOT 60hz. Being interrupt driven, it's actually more akin to something like 1000hz in resolution.

Horseshit. You determine the serial transfer rate between device and computer. Old systems defaulted that to 60 hz, and newer can do 100+ Both devices data still have to go through the same latency of Windows I/O (so the benefits of direct hardware are lost in the noise)

 

[R-T-B]

Horseshit.

It's literally an interupt based interface, not polling based. The keyboard is expected to do the polling of course but the interface key status is signaled as fast as possible at bus speed, 5mhz or 5000hz IIRC. Google is free my man. I know more about this than you are giving credit for.

Theres a reason some gaming keyboards still come with a ps/2 connector.

Old systems defaulted that to 60 hz

Also I think you are confusing this with screen refresh rate.

 

[80251]

It's literally an interupt based interface, not polling based. Google is free my man. I know more about this than you are giving credit for.

That dedicated, vectored, interrupt was way back in ISA days. I think PCI interrupts were level triggered and shared so not exactly the same. Do PCIe interrupts work the same as PCI interrupts?

 

[R-T-B]

That dedicated, vectored, interrupt was way back in ISA days.

Yep now we have superIO chips listening for the same interrupt and talking to the cpu through gpio pins, essentially being translators. Same end result.

 

[eidairaman1]

And? when each USB port is it's own controller, you're not exactly adding noticeable delay going through zero USB hubs on the way to my mouse and keyboard.

I used to overclock my PS2 mouse to 100 hz, but I can't tell the difference between that and USB.




Horseshit. You determine the serial transfer rate between device and computer. Old systems defaulted that to 60 hz, and newer can do 100+ Both devices data still have to go through the same latency of Windows I/O (so the benefits of direct hardware are lost in the noise)

Ahem read what @Bones just said earlier

 

[defaultluser]

It's literally an interupt based interface, not polling based. The keyboard is expected to do the polling of course but the interface key status is signaled as fast as possible at bus speed, 5mhz or 5000hz IIRC. Google is free my man. I know more about this than you are giving credit for.

Theres a reason some gaming keyboards still come with a ps/2 connector.


Also I think you are confusing this with screen refresh rate.

0

no, early windows systems all defaulted the port to 60 hz, which is why we all installed S2Rate on windows 98

Changing PS/2 mouse refresh rate

Improve the precision and smoothness of your ps/2 device by increasing the sample rate.

smallvoid.com

Listen to a man who has experience swapping back and forth on his windows system on crt, at 120 hz and although I could tell the difference between PS2 default, and running at 100 hz, I couldn't tell the difference between ps2 overclocked and USB stock (twitch gaming and desktop use)

Windows polls USB devices at that exact same "miracle PS2 1000 hz" refresh rate you keep quoting me (1ms update interval), so with a tweaked usb mouse driver, the peak perforamce is just as high

 

[R-T-B]

no, early windows systems all defaulted the port to 60 hz, which is why we all installed S2Rate on windows 98

sounds like you are confusing a driver limitation with a hardware one. That's some old workarounds.

miracle PS2 1000 hz

I never said anything of the sort. I said that would be more comparable but interrupt based busses aren't polled at all.

Btw, I use a WASD code kb daily in ps/2 mode in part because the manual literally states that you'll get the best performance that way.

Since I don't have a PS/2 port, I use a 1000hz rated ps/2 converter. Google "Soarers converter"

 

[80251]

Yep now we have superIO chips listening for the same interrupt and talking to the cpu through gpio pins, essentially being translators. Same end result.

I don't think they're looking for edge triggered, unique, ISA interrupts anymore. If they're still PCI devices, in the PCI address space, I don't even think there's a unique interrupt anymore for keyboard activity, I think the SuperIO chip generates on interrupt for the entire chip and all its functionality. I suppose from the PS/2 keyboard controller's PoV it might be still exactly the same though.
It is strange how an interrupt driven device is being tied to a polling interval.

 

[defaultluser]

sounds like you are confusing a driver limitation with a hardware one. That's some old workarounds.


I never said anything of the sort. I said that would be more comparable but interrupt based busses aren't polled at all.

Btw, I use a WASD code kb daily in ps/2 mode in part because the manual literally states that you'll get the best performance that way.

Since I don't have a PS/2 port, I use a 1000hz rated ps/2 converter. Google "Soarers converter"

And meanwhile, the rest of the world move on decades ago, because you have to be a damn audiophile type to think there is any difference in this Snakeoill

 

[R-T-B]

And meanwhile, the rest of the world move on decades ago, because you have to be a damn audiophile type to think there is any difference in this Snakeoill

Just stating the actual specs. I fully acknowledge the difference is negligible and likely beyond perception unless maybe if you can press more than 6 keys at a time. (PS/2 still holds the undisputed NKRO edge.)

 

[Bones]

Just stating the actual specs. I fully acknowledge the difference is negligible and likely beyond perception unless maybe if you can press more than 6 keys at a time. (PS/2 still holds the undisputed NKRO edge.)

I agree with this because whether it's 60MHz, 100MHz, 1,000MHz or any other MHz it doesn't make a rat's ass of difference because you cannot humanly press/click a button 60 times per second to match, much less exceed the polling rate of the device.
And if you are you're probrably using a bot which means you're cheating in the first place, however I can see a rapid fire controller possibly in use.

For keyboards and OC'ing, are we overclocking our keyboards so we can benchmark notepad to see some extreme WPM?
I don't think so but go for it if you want, I'll come back later to see your scores because I'm not sticking around to watch.

 

[CapitanXeon]

unless maybe if you can press more than 6 keys at a time

I once had the misfortune of needing a shortcut that my keyboard physically could't do because of rollover, and it was a PS/2 keyboard. I know that was because the keyboard was crap, but it's something that never knew could happen on a standard user basis.

 

[R-T-B]

I once had the misfortune of needing a shortcut that my keyboard physically could't do because of rollover, and it was a PS/2 keyboard. I know that was because the keyboard was crap, but it's something that never knew could happen on a standard user basis.

a lot of old keyboards were 2 key rollover, and that is something you can legit hit without going into hotkey dark arts...

 

[Hachi_Roku256563]

I still use a PS2 keyboard
mainly cause i hate change
IT has the WIndows 9X logo on it... thats how old it is
its using my Motherboards multi function PS2 port
Interesting enough when i upgraded from a a320m-h to my current board i went from 2 ps2 ports to a multi function

 

[CapitanXeon]

a lot of old keyboards were 2 key rollover, and that is something you can legit hit without going into hotkey dark arts...

oh my, that would be the absolute worst, i couldn't live with a 2 key rollover keyboard, period

 

[Hachi_Roku256563]

i hate change but to a point i have to change
PS2 keyboards work fine without any issue at all and require no extra work and remove no functions infact it add function to my computer
Ie ability to cold boot with keyboard press
and a ps2 keyboard looks the same as any old keyboard
+1 extra usb

 

[Steevo]

oh my, that would be the absolute worst, i couldn't live with a 2 key rollover keyboard, period

Some keys aren’t bound to the same SPI so some may have a 2 key group they are part of, but yeah, the cheap USB keyboards all fail at fast multi key gaming and or working between multiple screens for this reason.

 

[ir_cow]

It has nothing to do with Win XP, PS/2 isn't plug and play connector.

True. it isn't a plug and play like the USB successor. Last time I really used PS/2 was with WinXP. Same thing applies to all OSes.