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General discussion

Differences between PS/2 and USB Keyboard?

Jun 10, 2007 8:27AM PDT

I have a question.
What's the difference between a keyboard that uses PS/2 and one that uses USB?

The only difference that I could find is that PS/2 aren't designed to be "hot swappable."
This means that you shouldn't remove and replace a keyboard using a PS/2 while the computer is still operating.

On the other hand, with a USB, you can apply such "hot swapping" method.

Am I correct about the "hot swapping" properties and are there any other difference between a keyboard that uses PS/2 and USB?

Thanks.

Discussion is locked

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That's about it.
Jun 10, 2007 8:37AM PDT

There is one other issue and that on older boards you may find it impossible to setup the BIOS without the PS2 keyboard. There is another issue with USB keyboards and that an incomplete install of Windows is known to crash if the motherboard drivers are not installed. Again, the PS2 keyboard saves the day as you can get back in, finish the install and then let them have their USB keyboard back.

What do I use on my homebuilts? All are PS2 save a very special little server.

Bob

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Yep, what Bob said. . .
Jun 10, 2007 9:21AM PDT

Some machines will not activate the USB ports until you're past the BIOS option so you cannot access the BIOS. You may never need that access, but if you do you're SOL. Just wondering, why would anyone want to hot swap a keyboard?

I will not own a USB keyboard. Well, change that. I do own one, that's how I found out it's shortcomings. I use it as a door stop.

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What's So Wrong With USB?
Jun 10, 2007 11:52AM PDT

What was so wrong with the USB keyboard?

Why is a PS/2 keyboard better than a USB keyboard?

I'm looking to buy a new keyboard because mine is messed up. The keyboard that I'm looking to buy is the Saitek Eclipse Keyboard. This keyboard employs USB and from the reviews that I've read, especially from CNet, it's great.

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Only wrong for the reasons noted.
Jun 10, 2007 12:11PM PDT

If you have "one of those" motherboards that don't recognize it to get to the BIOS, you'll soon learn the issue firsthand.

Bob

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I'm sure it's a great keyboard. . .
Jun 10, 2007 10:37PM PDT

And probably expensive although I didn't check the price.

I once had a LogiTec USB keyboard. Really neat, it had all sorts of special keys in the location of the function keys. I was impressed. Until I needed to boot in Safe Mode. The F-8 key was mapped to one of the "special" functions. Pressing F-8 on boot did nothing. An email to LogiTec brought a reply that the F-8 key was not changeable. Therefore I could not get into Safe Mode. Therefore it went into the trash.

Be careful.

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Not too expensive....
Jun 11, 2007 2:07AM PDT

It was priced at about $60 when it first came out.

On Amazon.com, it's about $30.88 and when you include the shipping, it's about $37 dollars.
I don't think it's too expensive when you consider that a cheap, decent keyboard costs about $20. Why not pay about $15 more and get a much better keyboard?

This keyboard is said to be for "gamers," but I think that it's for everyone.
It lacks the additional programmable buttons as a Logitech G15 might offer, but I'm not a hardcore gamer and don't find the additional buttons necessary.
Reading from the reviews, this keyboard has a nice feel when you press them and they are somewhat quiet. Essentially, this keyboard is very smooth.

However, what put this keyboard over the top and what attracted me is the blue LED key illumination and backlighting. It's pretty freaking cool.

So, when you have a cool blue LED light illumination and the keyboard is very smooth and good, I think it's worth the $35 dollars.
I haven't read anything where the Saitek keyboard has broken down. Hopefully, that will be the same case for me.

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Hopefully you never need to enter the BIOS. . .
Jun 11, 2007 9:41AM PDT

If you do that keyboard will not work. Keep a PS/2 keyboard handy.

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What is BIOS???
Jun 11, 2007 11:31AM PDT

Sorry if it may sound like a dumb question, but what is BIOS???
(Not an expert in computers, so I'm sorry.)

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Basic Input/Output System...
Jun 11, 2007 11:36AM PDT

You can read up on it by clicking here, but in short it's what gets the computer from being off to launching your operating system. It performs the initial tests to ensure all hardware is working and can control various aspects of your computer, such as CPU and RAM speeds, amount of RAM that can be used for graphics, etc. It's a bit of a read, but it should give you a good grasp of the subject.

Hope this helps,
John

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Still don't get it...
Jun 11, 2007 11:41AM PDT

I read the wikipedia article about BIOS (Basic Input/Output System).

I don't know if my laptop uses BIOS. I have a Compaq Presario 900.
On the side note, I don't recommend the laptop, but it does the job.

Hopefully it doesn't use BIOS.

But I do have a USB PS/2 converter. Hopefully I don't have to encounter BIOS.

Let me restart my laptop and see if it uses BIOS.

Thanks for the heads up. If my laptop does use BIOS, I'll use the USB PS/2 converter.

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It has to use BIOS...otherwise it wouldn't work.
Jun 11, 2007 11:47AM PDT

Of course there are alternatives, like EFI, but BIOS is the standard and used in your computer.

John

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If I use...
Jun 11, 2007 11:49AM PDT

If I use a PS/2 USB converter and I plug my USB keyboard into a PS/2 slot, it'll be fine, right?

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Yes...
Jun 11, 2007 11:51AM PDT

In that case you can use a USB keyboard just as if it were a PS/2 model. That's the workaround since PS/2 devices are now the minority.

John

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Thanks....
Jun 11, 2007 11:53AM PDT

Thanks for the heads-up guys.

I'd be clueless without the help of all of you.

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A USB mouse is fine...right???
Jun 11, 2007 11:58AM PDT

A USB mouse is fine, right?

I don't have to worry about BIOS or something else screwing around with my mouse, right?

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It's fine...
Jun 11, 2007 12:05PM PDT

You can't use your mouse while accessing the system BIOS anyways, so it doesn't matter if you even have one connected.

John

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I have another question....
Jun 11, 2007 12:12PM PDT

I have another question...

Is there a difference between a USB PS/2 converter for a mouse and a USB PS/2 converter for a keyboard?

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Any good USB PS2 adapters???
Jun 11, 2007 12:23PM PDT

Any good USB PS2 adapters that you guys recommend?

I went on Amazon.com and Buy.com and it seems like most of the USB PS2 adapters are garbage.
There are many feedbacks that say that it doesn't work.

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Not really...
Jun 11, 2007 3:06PM PDT

They're usually color coordinated so it's easier to remember which plugs in where, but you can swap the adapters around without a problem.

Sorry, I can't recommend any PS/2 converters as I've never even used all of the ones that came when I bought keyboards, but follow the user reviews and you should be fine.

John