Is there anybody on list who can explain what a KVM switch actually does inside, i.e. its not just a simple switch it does somesort of emulation of keyboards and mice. Also are there any chemists on the list who could draw a diagram of a glucose molacule? Thanks D ===== -------------------- "We all know Linux is great... it does infinite loops in 5 seconds." Linus Torvalds __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/
On Fri, Jul 27, 2001 at 05:10:07AM -0700, David Freeman wrote:
Is there anybody on list who can explain what a KVM switch actually does inside, i.e. its not just a simple switch it does somesort of emulation of keyboards and mice.
As far as I know, it is a magic box that can talk PS/2, RS232, VGA etc. If a device is active, it reads from it and passes the data onto the appropriate output port. If not, it sends blank, dummy signals rather than disconnecting the device.
Also are there any chemists on the list who could draw a diagram of a glucose molacule?
I'm no chemist, but I can use google... http://www.coe.missouri.edu/~pgermann/projects2/SSME/Overview/IntVis/Molecul... http://www.chem.purdue.edu/gchelp/molecules/glucose.html -- pkl.net/~trj ..::::::::::::::::::::::::::::::::::::::::::::::::. /\_./o__ ....:::::::::' We all live in a yellow subroutine... ':::: (/^/(_^~' ''::::: :::: ___.(_.)____ ':::::::::::::::::::::::::::::::::::::::::::::::::::
On Fri, 27 Jul 2001, David Freeman wrote:
Is there anybody on list who can explain what a KVM switch actually does inside, i.e. its not just a simple switch it does somesort of emulation of keyboards and mice.
It depends on how much you spend on a KVM :-) I have had differing amounts of sucess with different KVMs. You can have problems with the OS recognising the keyboard/mouse the motherboard recognising them etc. Some seem to emulate the keyboard/mouse others seem to just switch the connection etc, which can cause all kind of fun, also sometimes it appears that the OS can leave your mouse in a strange state! Do you maybe have a more specific question? As KVM switches can also range from around 50UKP all the way up to several grand for ones that can be used in data-centres and these can usually emulate Sun keyboards, USB keyboards, Mac keyboards etc. Adam -- This message is Copyleft - all rights reversed Adam
--- Adam Bower <abower@thebowery.co.uk> wrote:
On Fri, 27 Jul 2001, David Freeman wrote:
Is there anybody on list who can explain what a KVM switch actually does inside, i.e. its not just a simple switch it does somesort of emulation of keyboards and mice.
It depends on how much you spend on a KVM :-) I have had differing amounts of sucess with different KVMs. You can have problems with the OS recognising the keyboard/mouse the motherboard recognising them etc. Some seem to emulate the keyboard/mouse others seem to just switch the connection etc, which can cause all kind of fun, also sometimes it appears that the OS can leave your mouse in a strange state!
I only wondered as I was thinking of having a go at building one.
Do you maybe have a more specific question? As KVM switches can also range from around 50UKP all the way up to several grand for ones that can be used in data-centres and these can usually emulate Sun keyboards, USB keyboards, Mac keyboards etc.
I just wondered what they did before I loaded up Geda. Thanks D
Adam -- This message is Copyleft - all rights reversed Adam
===== -------------------- "We all know Linux is great... it does infinite loops in 5 seconds." Linus Torvalds __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/
On Fri, Jul 27, 2001 at 08:10:32AM -0700, David Freeman wrote:
Is there anybody on list who can explain what a KVM switch actually does inside, i.e. its not just a simple switch it does somesort of emulation of keyboards and mice.
[snip explanation]
I only wondered as I was thinking of having a go at building one.
A friend of mine had a cool idea for one a few years ago. I don't know if this exists yet, but... a box for controlling several machines with one keyboard would be nice where you can select which machine with a special keypress. So obviously, the magic box would need to understand PS/2, probably not too hard with a PIC chip. That way you could provide an interface something like "screen" where a hotkey switches to the next session. -- ()= | Toby Jaffey : pkl.net/~trj //\ | "One thing, no lie, Ethel frigid as an Eskimo pie. She's cool, in v_/_ | bed. She ought to be, 'cos Ethel's dead" -- Cold Ethyl, Alice Cooper
An answer to your prayers.... Belkin OmniCube do the on screen menu system, using the PrintScreen key... Simon -----Original Message----- From: alug-admin@stu.uea.ac.uk [mailto:alug-admin@stu.uea.ac.uk]On Behalf Of Toby Jaffey Sent: 27 July 2001 16:23 To: alug@stu.uea.ac.uk Subject: Re: [Alug] OT: Keyboards and sugar On Fri, Jul 27, 2001 at 08:10:32AM -0700, David Freeman wrote:
Is there anybody on list who can explain what a KVM switch actually does inside, i.e. its not just a simple switch it does somesort of emulation of keyboards and mice.
[snip explanation]
I only wondered as I was thinking of having a go at building one.
A friend of mine had a cool idea for one a few years ago. I don't know if this exists yet, but... a box for controlling several machines with one keyboard would be nice where you can select which machine with a special keypress. So obviously, the magic box would need to understand PS/2, probably not too hard with a PIC chip. That way you could provide an interface something like "screen" where a hotkey switches to the next session. -- ()= | Toby Jaffey : pkl.net/~trj //\ | "One thing, no lie, Ethel frigid as an Eskimo pie. She's cool, in v_/_ | bed. She ought to be, 'cos Ethel's dead" -- Cold Ethyl, Alice Cooper _______________________________________________ alug, the Anglian Linux User Group list Send list replies to alug@stu.uea.ac.uk http://www.anglian.lug.org.uk/ http://rabbit.stu.uea.ac.uk/cgi-bin/listinfo/alug See the website for instructions on digest or unsub!
--- Toby Jaffey <toby@earth.li> wrote:
On Fri, Jul 27, 2001 at 08:10:32AM -0700, David Freeman wrote: [snip explanation]
I only wondered as I was thinking of having a go at building one.
A friend of mine had a cool idea for one a few years ago. I don't know if this exists yet, but... a box for controlling several machines with one keyboard would be nice where you can select which machine with a special keypress. So obviously, the magic box would need to understand PS/2, probably not too hard with a PIC chip.
We have one on our servers here.
That way you could provide an interface something like "screen" where a hotkey switches to the next session.
I was just going to have a panel os switches and an atmel avr chip. That way I can use C and Gcc. Thanks D
-- ()= | Toby Jaffey : pkl.net/~trj //\ | "One thing, no lie, Ethel frigid as an Eskimo pie. She's cool, in v_/_ | bed. She ought to be, 'cos Ethel's dead" -- Cold Ethyl, Alice Cooper
_______________________________________________ alug, the Anglian Linux User Group list Send list replies to alug@stu.uea.ac.uk http://www.anglian.lug.org.uk/ http://rabbit.stu.uea.ac.uk/cgi-bin/listinfo/alug See the website for instructions on digest or unsub!
===== -------------------- "We all know Linux is great... it does infinite loops in 5 seconds." Linus Torvalds __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/
participants (4)
-
Adam Bower -
David Freeman -
Simon Parkes -
Toby Jaffey