On Mon, 14 Jan 2008 23:03:59 GMT, "Lord Turkey Cough"
<spamdump@invalid.com> wrote:
>??? how can you ruin a keybooard?
>
>All you are doing is plugging it it, ie giving it power, which is
>the same as you so when ou power your computer up.
>
>I fail to see how any device can not be hot pluggable, to be honest.
Do you feel the same way about your video card, can it be
put in and taken out while the system is running?
Lord Turkey Cough wrote:
> "Peter Olcott" <NoSpam@SeeScreen.com> wrote in message
> news:13onj0sj56o6346@news.supernews.com...
>> "Lord Turkey Cough" <spamdump@invalid.com> wrote in message
>> news:y1Pij.48210$Hc3.7150@newsfe1-gui.ntli.net...
>>> "Peter Olcott" <NoSpam@SeeScreen.com> wrote in message
>>> news:hyKhj.43459$1C4.35964@newsfe10.phx...
>>>> Can the keyboard be safely unplugged, and plugged back in with the power
>>>> turned on?
>>>>
>>> I do it all the time on both my computers with PS2 ports.
>>> No problems whatsoever.
>>> I would not hesitate to do it on a brand new computer.
>>>
>> It ruined my keyboard to I switched to a USB keyboard.
>
> ??? how can you ruin a keybooard?
>
> All you are doing is plugging it it, ie giving it power, which is
> the same as you so when ou power your computer up.
>
> I fail to see how any device can not be hot pluggable, to be honest.
>
Protocols that now support hot swapping include PC card, USB, FireWire,
Fibre Channel, SATA, SCSI and SAS.
Protocols that do not support hot swapping include PATA and PS/2
If you look closely at the connector design on hot swap components, some
pins may be longer than others. In the following example, the six ground
pins are longer than the others, and the ground pins make contact first.
Doing such things, is to prevent reverse potentials from appearing on data
pins. PS/2 has the pins all the same length, and any one could make contact
before the others.
Even Firewire, although it is listed in the hot swap list above,
is not considered entirely safe by its user base. Experienced
users connect Firewire cabling, before powering up their system.
"Calab" <myspam@csd.ca> wrote in message news:BnSij.4162$wx.187@pd7urf1no...
>
>>> It ruined my keyboard to I switched to a USB keyboard.
>>
>> ??? how can you ruin a keybooard?
>
> More likely he meant it ruined the keyboard port on the PC.
>
>> All you are doing is plugging it it, ie giving it power, which is
>> the same as you so when ou power your computer up.
>>
>> I fail to see how any device can not be hot pluggable, to be honest.
>
> Plug is half way in... the 5v and data lines have made contact, but not
> ground. All power is shunted through the data leads - *POP*
Even if that were true you could simply make the data connection shorter.
>
>
>
"Paul" <nospam@needed.com> wrote in message news:fmh786$uvt$1@aioe.org...
> Lord Turkey Cough wrote:
>> "Peter Olcott" <NoSpam@SeeScreen.com> wrote in message
>> news:13onj0sj56o6346@news.supernews.com...
>>> "Lord Turkey Cough" <spamdump@invalid.com> wrote in message
>>> news:y1Pij.48210$Hc3.7150@newsfe1-gui.ntli.net...
>>>> "Peter Olcott" <NoSpam@SeeScreen.com> wrote in message
>>>> news:hyKhj.43459$1C4.35964@newsfe10.phx...
>>>>> Can the keyboard be safely unplugged, and plugged back in with the
>>>>> power turned on?
>>>>>
>>>> I do it all the time on both my computers with PS2 ports.
>>>> No problems whatsoever.
>>>> I would not hesitate to do it on a brand new computer.
>>>>
>>> It ruined my keyboard to I switched to a USB keyboard.
>>
>> ??? how can you ruin a keybooard?
>>
>> All you are doing is plugging it it, ie giving it power, which is
>> the same as you so when ou power your computer up.
>>
>> I fail to see how any device can not be hot pluggable, to be honest.
>>
>
> http://en.wikipedia.org/wiki/Hot_swap
>
> Protocols that now support hot swapping include PC card, USB, FireWire,
> Fibre Channel, SATA, SCSI and SAS.
>
> Protocols that do not support hot swapping include PATA and PS/2
>
> If you look closely at the connector design on hot swap components, some
> pins may be longer than others. In the following example, the six ground
> pins are longer than the others, and the ground pins make contact first.
> Doing such things, is to prevent reverse potentials from appearing on data
> pins. PS/2 has the pins all the same length, and any one could make
> contact
> before the others.
Just made a comment about pin lengths before I read this.
It's prettty obvious really.
Anyhow I don't give a second thought to unplugging or swappinig keyboards
whilst powered up. I used to do it regularly.
5 volts is negligible, they have to cope with that anyway.
My USB2 digital TV stick won't work unless it is plugged in from
power up though, but I expect that is down to crap software.
>
> http://www.shopaddonics.com/mmSHOPAD...s/AASA4PPC.gif
>
> Even Firewire, although it is listed in the hot swap list above,
> is not considered entirely safe by its user base. Experienced
> users connect Firewire cabling, before powering up their system.
>
> HTH,
> Paul
On Tue, 15 Jan 2008 04:27:04 GMT, "Lord Turkey Cough"
<spamdump@invalid.com> wrote:
>
>"Calab" <myspam@csd.ca> wrote in message news:BnSij.4162$wx.187@pd7urf1no...
>>
>>>> It ruined my keyboard to I switched to a USB keyboard.
>>>
>>> ??? how can you ruin a keybooard?
>>
>> More likely he meant it ruined the keyboard port on the PC.
>>
>>> All you are doing is plugging it it, ie giving it power, which is
>>> the same as you so when ou power your computer up.
>>>
>>> I fail to see how any device can not be hot pluggable, to be honest.
>>
>> Plug is half way in... the 5v and data lines have made contact, but not
>> ground. All power is shunted through the data leads - *POP*
>
>Even if that were true you could simply make the data connection shorter.
What do you mean "could"? You are suggesting the entire
world lop off the connectors and make some new proprietary
connector and solder it on?
However, in all fairness the ground should make contact
before anything else because the outer metal rim is grounded
as is the frame of the connector shell. It still doesn't
eliminate the chance of transient surges, basically what it
boils down to is that in this industry parts are designed as
cheaply as possible and that means that if something doesn't
"NEED" to be hot pluggable, if there's a way to save a penny
by not supporting it, you can bet someone didn't.
On Tue, 15 Jan 2008 04:32:18 GMT, "Lord Turkey Cough"
<spamdump@invalid.com> wrote:
>Just made a comment about pin lengths before I read this.
>It's prettty obvious really.
>Anyhow I don't give a second thought to unplugging or swappinig keyboards
>whilst powered up. I used to do it regularly.
>5 volts is negligible, they have to cope with that anyway.
>
>My USB2 digital TV stick won't work unless it is plugged in from
>power up though, but I expect that is down to crap software.
This is a situation a bit like ESD damage. I mean you can
do it 100 times and have no problem, but that doesn't change
the fact that the 101st time you might have a problem
because it wasn't designed to accomodate this.
On Tue, 15 Jan 2008 04:32:18 GMT, "Lord Turkey Cough"
<spamdump@invalid.com> put finger to keyboard and composed:
>Just made a comment about pin lengths before I read this.
>It's prettty obvious really.
>Anyhow I don't give a second thought to unplugging or swappinig keyboards
>whilst powered up. I used to do it regularly.
>5 volts is negligible, they have to cope with that anyway.
"A latchup is the inadvertent creation of a low-impedance path between
the power supply rails of an electronic component, triggering a
parasitic structure, which then acts as a short circuit, disrupting
proper functioning of the part and possibly even leading to its
destruction due to overcurrent."
"It is possible to design chips that are latchup-resistant, where a
layer of insulating oxide (called a trench) surrounds both the NMOS
and the PMOS transistors. This breaks the parasitic SCR structure
between these transistors. Such parts are important in the cases where
the proper sequencing of power and signals cannot be guaranteed (e.g.,
in hot swap devices)."
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Re: Is the keyboard hot pluggable? 
Linear Mode
