Re: IIgs mouse replacement problem

[pitz <pitz.wong@gmail.com>]

Arrgh.  I have tried to repro the problem using the tear drop ADB
mouse and I couldn't.  I still have the problem using whatever PS/2
mouse I use, so it points more to the PS/2-ADB converter I have.  It
looks like the IOGear G-CV160 is the same as that sold by Belkin,
except for a different color.  And I don't have any another ADB mouse
(more modern than the tear drop mouse) to test with.

/Peter


On Jan 10, 8:56 pm, Warren Ernst <wer...@gmail.com> wrote:
> On Jan 10, 8:00 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
>
> > pitz wrote:
> > > I have wanted to replace my IIgs mouse and integrate it with my KVM
> > > ("K-M" is probably a more appropriate term with the setup I have).
> > > I've got a PS/2-style keyboard and optical mouse, and use an IOGear G-
> > > CV160 PS/2-ADB converter hooked up to my KVM switch.
>
> > > Connected to a Mac LC475's ADB port, there aren't any mouse-related
> > > issues.  But connected to a IIgs' ADB port, it gives an erratic mouse
> > > behavior.  Movement of the mouse will sometimes register a "click" in
> > > GS/OS.  So depending on where the mouse cursor is, the result of
> > > moving the mouse ranges from benign to disastrous.
>
> > > I initially thought it was either because of the PS/2-ADB converter or
> > > the KVM.  I eventually dug out an old Mac teardrop mouse and connected
> > > it directly to the IIgs, and the mouse problem is still there.  The
> > > original IIgs mouse does not exhibit the problem.
>
> > > Googling for info, I read up on the (in)famous "Space Aliens Ate My
> > > Mouse" TechNote for ADB devices.  It seems that there was at least one
> > > revision to the "Apple Mouse Protocol".  There is an "Extended Apple
> > > Mouse Protocol" which I am suspecting is what's used by modern ADB
> > > mice hardware (including the old Mac teardrop mouse).  TechNote is
> > > dated 9/1998.
>
> > > Is GS/OS expecting the original "Apple Mouse Protocol" from the
> > > device?  Can it be patched?
>
> > If anything expects the original protocol, it would be the IIgs,
> > which was the first implementation of the ADB.
>
> True, but that said, I've NEVER encountered a GS, be it a Rom1 or
> Rom3, that couldn't handle a teardrop-shaped ADB mouse.
>
> I have at least 5 ROM1s and two ROM3s (including the ROM3 on my desk
> right now) that have all used two different teardrop-shaped mice "no
> problemo."
>
> -Warr