Linux on the Nintendo GameCube and Wii

On Mon, 2005-02-21 at 14:47 -0800, Shaun Jackman wrote:
> Does GameCube Linux and Action Replay work with the keyboard adapter
> pictured here [1]? This adapter is only ten bucks on eBay.

This looks exactly like the one I have. In my case the claimed
manufacturer is called tototek. The adaptor can be made to work on gc-
linux but only with a kernel patch. I have already posted this patch to
the list and I'm waiting for any comments on whether adding support for
this adaptor it breaks the Datel one.

If it does break other keyboards I'll repost my patch based on a compile
time option so it can be committed to the CVS tree. 

-- 
Daniel Thompson <gc-linux@...>

I have a PS/2 keyboard to GameCube joystick port adapter labelled "GC
Keyboard & PS Controller Adapter 2 in 1 for GameCube". It works with
Action Replay and Phantasy Star Online, but I haven't managed to get
it working with Linux. Does this device work with GC Linux? I'm
running Linux 2.6.11-isobel-nfs9.

Thanks,
Shaun

On 5/1/05, Daniel Thompson <daniel@...> wrote:
> On Sat, 2005-04-30 at 17:36 -0700, Shaun Jackman wrote:
> > I have a PS/2 keyboard to GameCube joystick port adapter labelled "GC
> > Keyboard & PS Controller Adapter 2 in 1 for GameCube". It works with
> > Action Replay and Phantasy Star Online, but I haven't managed to get
> > it working with Linux. Does this device work with GC Linux? I'm
> > running Linux 2.6.11-isobel-nfs9.
>=20
> Try the attached patch.

Thanks for the patch. I haven't yet compiled my own GC kernel, but as
soon as I have I'll get back to you.

In the following line, the right-hand-side is identically zero.=20

  =09=09key[2] |=3D (raw[1] << 28) & 0xFF;

From the surrounding code, I'd guess a right shift was intended.

  =09=09key[2] |=3D (raw[1] >> 28) & 0xFF;

This would mean though that the bits decoded by key[2] and key[3] overlap.

 =09=09key[2] =3D ((raw[0] << 4) & 0xFF) | ((raw[1] >> 28) & 0xFF);
=09=09key[3] =3D (raw[1] >> 24) & 0xFF;

If we label raw[1] as bits 0..31 and raw[0] as bits 32..63 we have

=09key[0] =3D bits 44..51
=09key[1] =3D bits 36..43
=09key[2] =3D bits 28..35
=09key[3] =3D bits 24..31
=09key[4] =3D bits 16..23
=09key[5] =3D bits 8..15

This table shows the overlap of bits 28..31, as well as the undecoded
bits 0..7 and 52..63. Is there any information transmitted in those
undecoded bits?

Cheers,
Shaun

On Mon, 2005-05-02 at 10:10 -0700, Shaun Jackman wrote:
> If we label raw[1] as bits 0..31 and raw[0] as bits 32..63 we have
>=20
> 	key[0] =3D bits 44..51
> 	key[1] =3D bits 36..43
> 	key[2] =3D bits 28..35
> 	key[3] =3D bits 24..31
> 	key[4] =3D bits 16..23
> 	key[5] =3D bits 8..15

I don't think anyone has a compete picture of exactly how the keyboard
is supposed to work (though I think groepaz is closest).

In the case of the cheap third party adaptors (which is what I think you
have) the keyboard scan codes appear in bits 24..31 if a single key is
pressed, bits 16..31 when two keys are pressed and bits 8..31 when three
keys are pressed. My patch lets Linux read those three bytes and I left
the original code unmodified to try and stop my patch breaking real
Nintendo keyboards (unfortunately I haven't found anyone else with a
keyboard that can test my patch on so it hasn't yet been offered for
CVS).

I assumed that the register protocol permits keyboards to have up to six
keys pressed simultaneously but that PC derived keyboard controllers
can't support than many keys. This allows different keyboard to stash
their scan codes in different parts of the register space. I would add
that never having seen a Nintendo keyboard that this is purely
speculation on my part.
=20
> This table shows the overlap of bits 28..31, as well as the undecoded
> bits 0..7 and 52..63. Is there any information transmitted in those
> undecoded bits?

I've no idea what these bits do and groepaz's YAGD is also unsure. Oddly
enough bits 0..29 are undocumented here but some of these bits are used
in the Linux keyboard driver.

--=20
Daniel Thompson (Merlin) <daniel@...>
signature.asc? http://www.redfelineninja.dsl.pipex.com/signature.html

Did Sigmund's wife wear Freudian slips?

On Tuesday 03 May 2005 21:24, Daniel Thompson wrote:

> I've no idea what these bits do and groepaz's YAGD is also unsure. Oddly
> enough bits 0..29 are undocumented here but some of these bits are used
> in the Linux keyboard driver.

the problem that shows up here is that only very few people actually care
about sending me fixes for yagcd...and i cant keep up with all and every-
thing on my own. 

-- 
gpz

http://www.hitmen-console.org
http://www.gc-linux.org/docs/yagcd.html

On Wed, 2005-05-04 at 14:12 +0200, Groepaz wrote:
> On Tuesday 03 May 2005 21:24, Daniel Thompson wrote:
>=20
> > I've no idea what these bits do and groepaz's YAGD is also unsure. Oddl=
y
> > enough bits 0..29 are undocumented here but some of these bits are used
> > in the Linux keyboard driver.
>=20
> the problem that shows up here is that only very few people actually care
> about sending me fixes for yagcd...and i cant keep up with all and every-
> thing on my own.

Don't worry, YAGCD is very useful already.

Unfortunately I can't add anything to the table regarding the keyboard -
YAGCD describes exactly how my keyboard adaptor works already.



--=20
Daniel Thompson (Merlin) <daniel@...>
signature.asc? http://www.redfelineninja.dsl.pipex.com/signature.html

Did Sigmund's wife wear Freudian slips?