Re: [driver] New life for Serial mice

[Vojtech Pavlik <vojtech@suse.cz>]

On Wed, Jun 06, 2001 at 11:21:34PM +0000, Pavel Machek wrote:

> > If you still have your 3-button MouseSystems (or any other serial) mouse
> > somewhere in your driver, forgotten becase of the incredibly slow update
> > rate causing so much jumping of the pointer on the screen that it is
> > unusable, you may want to pull it out and give it a try.
> > 
> > Or if you're still using it with some old 486 computer, this driver is
> > for you. 
> > 
> > What it does is that it enhances the update rate from 24 (with current
> > GPM and X drivers) to 96. This is almost what the best USB mice do.
> 
> What's the "prediction" stuff? Does it mean you are guessing some values
> by interpolation?

Extrapolation, yes.

> [If so, what kind of update rate would it do on USB?]

It wouldn't make any difference - on USB you always get whole packets,
while over serial port the data is processed byte by byte and thus we
know a little of the information before the whole packet arrives.

-- 
Vojtech Pavlik
SuSE Labs