Re: [PATCH] m68k: Fix atarimouse init

[Petr Stehlik <pstehlik@sophics.cz>]

Michael Schmitz píše v Pá 02. 01. 2009 v 23:10 +0100:
> > > 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?

Isn't it sane to have the origin at top so the mouse increments are
logically in sync with video coordinates?

I mean I am not sure what's wrong in this chain but I have just tested
ARAnyM to ensure that moving the mouse down on the screen generates
positive y-axis increments.

> I guess we could reverse that (at least for ARAnyM).

I am against changing generic Atari related things just for ARAnyM. I
said earlier (about 12 hours before you posted this mail) that I would
fix anything in ARAnyM to make it more linux-m68k compatible.

I am just not sure what's wrong here - does the linux-m68k indeed
switches the point of origin to bottom of screen and relies on that? Why
if you say that the old busmouse code used the "normal" top-screen
origin?

> How would I go about figuring out the kernel runs on ARAnyM, Petr?

Using the NatFeats, of course. But see above - I am against such hacks
and I'll add the code for reversing Y-axis real quick if its really
necessary.
 
> > > 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. 

Michael, I don't think there is anybody out there using such hardware
joystick-mouse modification. But there is number of people using the
Eiffel PS/2 adapter so if supporting anything then I'd go for that.

BTW, is it just my feeling that you kind of didn't take my mail
(Thursday 11:20) into account when replying to Andreas?

Petr


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