[haiku-development] Re: Some questions

>> >  -------------- Original message ----------------------
>> >> > Actually there's no way to tell if a joystick is connected to a
>> >> > gameport, unless some proprietary extensions I don't know of. Also,
>> >> the
>> >> > port support 4 axis and 4 buttons, so it is possible to have 2
>> >> joysticks
>> >> >   with 2 axis and 2 buttons each with an Y-splitter cable; but it
>> >> > doesn't work with all the ports and all the joysticks. Over the
>> years,
>> >> > makers such as Microsoft and Logitech used the game port in _very_
>> >> > creative ways...
>> >> >
>> >> > An ideal design for a game port driver would be to just publish the
>> >> > ports and just report the raw readings, then let the user create
>> the
>> >> > joystick device by let him choosing which port it is connected to.
>> >> This
>> >> > approach allows for different uses, back at school we used it in
>> some
>> >> > electronics projects.
>> >
>> >> Some clarification about "publishing devices you don't have as it
>> does
>> >> today."
>> >> I was talking about the Gameport. If you don't have a Gameport it
>> should
>> >> not show two as it does today :)
>> >>
>> >
>> > The standard Gameport is just memory mapped I/O in low address space.
>> > That memory space will always be there.   I'm not sure how you would
>> > determine if a gameport should be published.   When the gameport is
>> being
>> > used, the data in that memory will change.
>
>> k didn't know that. But the driver for the soundblaster live gameport
>> only
>> publish the gameport if the card exist (i think) perhaps something
>> similar
>> can be used? but this would explain why the gamports are always showed
>> in
>> R5
>>
>
> I think in one of the Be newsletter, one of the engineers recommended that
> the old gameport should be abandoned.  It requires continuous polling of
> the data ports, which is terribly inefficient and likely will slow the
> rest of the system down.
> As far as the SBLive and Audigy,etc.. the gameport is treated like a
> completely separate device.  They have their own PCI-ID, different from
> the soundcard ID (you can look at Devices under R5).      Ages ago, I
> wrote a gameport driver for the Audigy using the generic module :-)
So you are him :) (http://www.bebits.com/app/3340)

I was thinking of adding http://www.bebits.com/app/2017 source to Haiku,
but perhaps we chould have different thing than Gameport thing to Haiku?
But I don't know what :(


How are other OS do this?
>
> Greg Crain
>
>


-- 
MVH
Fredrik Modéen

Other related posts: