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Mac Forum / General / Hardware / January 2005



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Sharing Keyboard and Mouse between Mac and PC

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Ringo Langly - 18 Jan 2005 16:25 GMT
Hey Folks,

At work we're total Microsoft, but I'm total Mac at home :)  I've been
throwing around the idea of getting a Mini Mac for work, but I'd like
to continue using my USB mouse and keyboard I use now on Windows with
the Mini Mac.  I already have dual monitors on the PC, so I'd just use
one with Windows and one with OSX.

So... I need some easy method to switch between Windows and OSX for the
Keyboard and Mouse only.  Granted I can get a KVM, but those are
pricey, and I don't need the video part of it.  Since both are USB do
they make such a thing as USB switchboxes?  I guess I could also run a
cable to both the PC and Mac and just plug-in the appropriate cable as
needed, but I'll be switching between both quite a bit, so a single
button would be simpler.

Suggestions??  Is there a cheap and easy solution for this?  If I have
to spend $50+ on a KVM I will, but I'd rather not if there's a cheaper
method.

Thanks,

Ringo
Jeffrey Alsip - 19 Jan 2005 00:42 GMT
Two system KVM switches are NOT pricey on ebay. A search discovers that
many sell for under $10. You will need a pair of cheap USB to PSU
adapters for the Mac side. Since the KVM will come with the monitor
switching ability anyway, you can keep your dual monitors on the PC and
just occassionally switch one over to the Mac. Please do the standard
"will a KVM work on my system" test...unplug the mouse and keyboard
from each system, wait a minute or so and plug them back in. If the
keyboard and mouse work like they were never disconnected, then you are
KVM ready.
Spud Demon - 19 Jan 2005 03:11 GMT
"Jeffrey Alsip" <jeffreyalsip@hotmail.com> writes in article <1106095337.596123.204610@f14g2000cwb.googlegroups.com> dated 18 Jan 2005 16:42:17 -0800:
>Two system KVM switches are NOT pricey on ebay. A search discovers that
>many sell for under $10. You will need a pair of cheap USB to PSU
[quoted text clipped - 5 lines]
>keyboard and mouse work like they were never disconnected, then you are
>KVM ready.

PS2 adapter?  Yuck!  That decreases the available mouse bandwidth by a
factor of 2.  Anyway he said he's already using USB for both KB and mouse on
his PC so he'd have to get 2 sets of adapters to make a cheapo KVM switch
work.

I tried a mechanical VGA switch once, had to take it back because it
introduced so much video noise.  Now I use a Belkin 4-port for my
PC/Alpha setup.  If I needed an Apple in the same room I'd spring for the
USB version.  Sorry I don't know whether there are USB switches that don't
include video; the video is almost certainly what keeps the price high.

-- spud_demon -at- thundermaker.net
The above may not (yet) represent the opinions of my employer.
Jeffrey Alsip - 19 Jan 2005 04:54 GMT
Mouse bandwidth? Let me read that again. No, it's true he said "mouse
bandwidth". My Logitech Trackball came with a USB to PS2 adapter, and I
can't tell any difference in the way the pointer moves around the
screen. Will it be necessary do do a "double click" in slow motion
because the "bandwidth" is so slow? I have to research this. Does CNET
have a Mouse Bandwidth Meter? How many Kbytes per second should the
average mouse run at? Maybe I need to beef up ALL my systems to get
greater mouse speed! Damn, the speed of my mouse has been holding me
back all these years.
Spud Demon - 19 Jan 2005 15:45 GMT
"Jeffrey Alsip" <jeffreyalsip@hotmail.com> writes in article <1106110487.635985.74730@c13g2000cwb.googlegroups.com> dated 18 Jan 2005 20:54:47 -0800:
>Mouse bandwidth? Let me read that again. No, it's true he said "mouse
>bandwidth". My Logitech Trackball came with a USB to PS2 adapter, and I
[quoted text clipped - 5 lines]
>greater mouse speed! Damn, the speed of my mouse has been holding me
>back all these years.

Oh, maybe I just made it up.  The rest of the world is switching from PS2
mice to USB for no reason at all.  You don't get more accurate mouse
pointing with USB.  Just because you can't notice a difference doesn't
necessarily mean you're "slow" yourself... or does it?

Sarcasm aside, the baud rate for a PS2 mouse is much lower than a USB mouse
(9600 vs. 1.5M).  That means that while it's moving, the tracking is more
accurate for the USB mouse.  The PS2 mouse should "catch up" within 32 bits
(3 ms) of stopping, but for accurate dynamic motion the USB mouse rules.

-- spud_demon -at- thundermaker.net
The above may not (yet) represent the opinions of my employer.
 
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