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  1. #1
    Regular Coder Kevin_M_Schafer's Avatar
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    KVM -- mouse that could copy and paste between computers

    Anyone ever use a KVM? I've often thought it would be really cool -- and highly advantageous -- to have a "copy" button on the mouse, and when I flip to the other computer, I could "paste" the saved file or text to that computer.

    Does anyone know if this already exists?

    --Kevin

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    define "flip to the other computer" are you talking about a VPN? or another machine in the same room?

  • #3
    Regular Coder Kevin_M_Schafer's Avatar
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    Hi dylanbaumannn,

    Thanks for the reply. I have a Keyboard - Video - Mouse (KVM) 2-port computer switch. Two computers hook up to it, and the same keyboard, monitor, and mouse are used to run two computers.

    I simply push a button and the monitor flickers for a split second, and then I'm on the other computer.

    My KVM is for DVI and it has a red LED on the front that displays either a "1" or "2" -- to tell me at a glance which computer I'm on at the moment.

    What's a VPN?

    --Kevin

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    God Emperor Fou-Lu's Avatar
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    KVM's are switches that connect multiple machines to single monitor and keyboards. You literally push a button (or sometimes configured with other buttons like printscreen) to switch between the machines connected.

    Not sure if a "smart" KVM exists. Copy of course goes into RAM, so that's distinct to the machine in use. I could potentially see a "smart" KVM with installable software that intercepts the copy and stores it in both RAM and the KVM RAM. The software would unfortunately need to be specific for the OS and architecture its installed on. Somehow I can see the clipboard being one of those massive hidden pitfalls that would produce some really unusual behaviour. Lol

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    Quote Originally Posted by Kevin_M_Schafer View Post
    What's a VPN?
    I understand now about the KVM, haha sorry, should have done a quick google search before I posted.

    A VPN is a Virtual Proxy Network, much like what you're doing, except you can connect to a computer at a remote location (log into your work computer from home for example)

  • #6
    Regular Coder Kevin_M_Schafer's Avatar
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    Thanks Fou-Lu and dylanbaumannn,

    My KVM uses PS2 power. If the number 1 machine isn't turned on, I can't use the number 2 machine -- the mouse and keyboard are dead and the monitor doesn't display.

    Lets say we have a USB mouse -- we all have at least 10 of them in a box. Okay, now lets put a flash drive inside of one. Could we somehow have an app loaded on both machines that would recognize its own special "copy" or "paste" command, coming from the flash drive inside the mouse?

    I build my own computers, but I don't understand necessarily how the software interfaces with the hardware.

    --Kevin

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    Master Coder felgall's Avatar
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    Quote Originally Posted by Kevin_M_Schafer View Post
    My KVM uses PS2 power. If the number 1 machine isn't turned on, I can't use the number 2 machine -- the mouse and keyboard are dead and the monitor doesn't display.
    I assume from that you are powering the monitor via the 1st computer - since the kvm usually picks up its power from the monitor (which is why the instructions generally read to turn on the monitor first).

    The keyboard, mouse and monitor attached to a KVM are no different from having a separate keyboard, monitor, and mouse attached to each computer. To transfer files between computers you need to connect to the appropriate network drive and copy the file from there. You can use the mouse to copy/paste between folders on the two computers provided you have both of the folders open on the one computer at the same time.
    Stephen
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  • #8
    Regular Coder Kevin_M_Schafer's Avatar
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    Hi felgall,

    Thanks for the reply. The reason I use a KVM in the first place is to keep on computer completely isolated from the outside world. The isolated computer is G network to the printers and scanners. The "Internet" computer is N. In a pinch, I do log on to the G network with the Internet computer to print a document. The isolated computer is not networked with anything but hardware devices and two other computers that do not log on to the Internet either.

    I wish there were a way to transfer a document or picuture, for example, between both computers that are connected to the KVM -- without having to use a flash drive.

    --Kevin

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    Master Coder felgall's Avatar
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    Quote Originally Posted by Kevin_M_Schafer View Post
    In a pinch, I do log on to the G network with the Internet computer to print a document. The isolated computer is not networked with anything but hardware devices and two other computers that do not log on to the Internet either.

    Your N computer can be included in your G network without giving any of the other computers on the G network any access to the internet. That one computer would be a bridge between the two networks with only it having access to both.

    You could then configure the sharing options and firewalls on each computer so that the N computer cannot access anything on any of the computers on your G network while the computers on the G network have access to one shared location on the N computer. You then move any files you want to be able to transfer to that location in order to make them accessible without needing a flash drive.
    Stephen
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    Regular Coder Kevin_M_Schafer's Avatar
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    Hi felgall,

    Thanks for the information. I haven't tried your advice yet, but I do have a question. I know that N can see G, but G can't see N. So, do I create a folder on the G computer, and copy and paste files from either machine into it to share back and forth? If I create a shared folder on the N machine, I don't think the G machine could find it.

    --Kevin

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    Master Coder felgall's Avatar
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    If you have things so one computer can see the other but not the other way around then set up the shared folder on the computer where both can see it.
    Stephen
    Learn Modern JavaScript - http://javascriptexample.net/
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    Don't forget to start your JavaScript code with "use strict"; which makes it easier to find errors in your code.

  • #12
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    Just to add, if you get a network setup...

    Win2VNC will provide you with the software solution you are looking for. It only works once the operating system is running (eg if you want to change bios settings on the second machine you'll still need a KVM) but it will allow you to move the mouse to the other computer and use copy/paste between them both.

    On the target computer you'll need to run a VNC server. TightVNC is free and so is Win2VNC.

    TightVNC is a server and client that allows you to connect to a VNC server and see that computers desktop and interact with it. Win2VNC cuts out the viewing window and simply allows you to move your mouse off screen which will then make Win2VNC send your mouse and keyboard commands to the other computer. It's a very good bit of kit.

    As an example, I have my netbook on the desk with my main computer. Its a pain to keep switching from one to the other (plus I don't like the netbooks keyboard/trackpad) so I run TightVNC server on the netbook and then access it using Win2VNC from my main desktop machine. When I move the mouse off the screen to the left or right (which you can set in the options) it moves onto the netbook screen where I can then use the mouse and keyboard from my desktop computer including copy and paste between both machines.
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