Hi Andreas,

> > Weird - the inversion of the y direction increment is taken from the old 
> > busmouse driver code where it used to work OK. The point of reference is 
> > set to 
> > be at the top of the 'screen' so moving the mouse down ought to generate 
> > positive increments.
> 
> ARAnyM's emulation of the IKBD does not support changing the y origin.

Bummer - any reason the origin was set to the top initially? I guess we could 
reverse that (at least for ARAnyM). Would make the rest of the code more sane 
as 
well. How would I go about figuring out the kernel runs on ARAnyM, Petr?
 
> >>   - the left and right mouse button are interchanged
> >
> > The busmouse driver had no annotation as to the semantics of the buttons so 
> > O 
> > guessed bit 0 was for the left button. Guessed wrong, it seems.
> 
> Note that the mouse button bits are also inverted, ie. 0 means down.

You're right. I'd been wondering about that part in the old mouse driver...

> > knows what the ikbd format for the third button is (on real hardware) it's 
> > easy 
> > to add that in.
> 
> The IKBD does not support more than two buttons.  For a three button
> mouse the middle button was apparently wired to the joystick port.
> 
> See also <http://dev-docs.atariforge.org/files/ikbd_Prot_2-26-1985.pdf>.

Thanks, Andreas. Seems I'll have to revive the old joystick code, then. 

Cheers,

        Michael

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