From: Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Allegro - Mouse Problems
Date: Tue, 19 Aug 1997 19:16:35 +0100
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George Foot writes:
>Would it be possible to use the mickey reading instead of the absolute
>location, and update an internal location inside the code? This way
>the mouse sensitivity would be more adjustable in general, since
>mickeys are pretty fine units, and it shouldn't be hard to code,
>either.

I _think_ this would be possible: indeed it's the only way I can imagine
that the Logitech driver could be made to work correctly. It would
require us to emulate everything the int 0x33 driver currently does,
though (speed adjustments, clamping to a screen region, finding a good
curve for the relationship between mickeys and position deltas...) so it
would be a fair amount of work.

The only potential trouble I can see is that we would have to call the
poll functions for button state and mickey counts inside a timer
handler: I don't think this would be a problem, but it depends on the
details of the DOS driver...


--
Shawn Hargreaves - shawn AT talula DOT demon DOT co DOT uk - http://www.talula.demon.co.uk/
Beauty is a French phonetic corruption of a short cloth neck ornament.