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Mouse ps/2 polling rate overclock problem

post #1 of 4
Thread Starter 
today i pluged my wmo over ps/2 adaptor, and i have a feeling that it's much smoother pluged over ps/2 than usb. however, ps/2 port defaults to 100mhz, which in return makes wmo's max speed (enotus result) of just 0.8 m/s, which essentially sux the hairy a$$hole.

my next step was to overclock ps/2 rate to 200mhz by following guide @http://forums.logitech.com/t5/Mice-and-Pointing-Devices/PS-2-Mouse-Report-Rate-under-Windows-7-x64/td-p/441128 (third post). and it worked.

but then the problem started. normally i use old ibm ps/2 keyboard (it is my prized posetion for over 12 years), and when i overclocked the polling rate it stared to lagggg, big time. sometimes i press jump, and the jump occours half a second later. then i tried to do it in win xp, and the problem stayed the same as in windows 7, which is driving me insane pretty much.

any suggestions how to solve this?



p.s.
i did some quick testing with enotus on usb port. @125hz wmo has 1.0m/s max speed with 127 counts. @250hz max tracking speed increases (you all know this of course), but the counts number decreases to 106. further increase in polling speed above 250hz reduces the counts number even further. it is my humble opinion that this reduction in counts number reduces the smoothness of the mouse by a noticeable margin.

when i tried it over ps/2 @200hz max speed increased @1,55 (just like when overclocking the usb @250), but the counts number stayed the same. in turn it seems to me it's much smoother on ps/2@200hz than on usb@250hz.

and no, i can't live without my old keyboard....
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
X2 240 Gigabyte ma770-ud3 Gigabyte hd4850 Patriot 2*1GB ddr2 800mhz 
Hard DriveOptical DriveOSMonitor
WD blue 500GB don't use it window$ 20" Philips 
KeyboardPowerMouse
IBM Corsair cx400 Genius Xscroll 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
X2 240 Gigabyte ma770-ud3 Gigabyte hd4850 Patriot 2*1GB ddr2 800mhz 
Hard DriveOptical DriveOSMonitor
WD blue 500GB don't use it window$ 20" Philips 
KeyboardPowerMouse
IBM Corsair cx400 Genius Xscroll 
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post #2 of 4
Try a PS/2 to USB adapter/converter?

PS: The decrease in max polling coount is pretty logical but I can't say much about "what you feel". wink.gif
post #3 of 4
Thread Starter 
i thought of that adapter, and hopefully i should receive one from ebay in 3 weeks time:D

in the mean time i am trying to figure out a software solution... but i can not figure out why does increasing polling time of the mouse influence the keyboard also, since these are two seperate ps/2 lanes. my best guesses are that this legacy hardware ports aren't implemented as they used to be, or the problem lays in the fact that the mouse is connected via usb 2 ps/2 port. more digging around the registry needed...

may i ask why is reduction in polling rate logical? and why doesn't it reduce when i overclock ps/2 port?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
X2 240 Gigabyte ma770-ud3 Gigabyte hd4850 Patriot 2*1GB ddr2 800mhz 
Hard DriveOptical DriveOSMonitor
WD blue 500GB don't use it window$ 20" Philips 
KeyboardPowerMouse
IBM Corsair cx400 Genius Xscroll 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
X2 240 Gigabyte ma770-ud3 Gigabyte hd4850 Patriot 2*1GB ddr2 800mhz 
Hard DriveOptical DriveOSMonitor
WD blue 500GB don't use it window$ 20" Philips 
KeyboardPowerMouse
IBM Corsair cx400 Genius Xscroll 
  hide details  
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post #4 of 4
Assuming a stable polling rate, as long as the polling is a limitating factor the max count will stay at 127, at the point where the polling rate isn't a bottleneck anymore the max count will decrease.

Higer Polling = Lower Max Count

I didn't do the exact calculation but 200 Hz should be around the max speed the of the mouse.

So it sound for me it's a 200 Hz vs. 250 Hz difference, not a PS/2 vs. USB one.
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