Visiting an Atari 800 webpage, i have found an interesting expansion to CPC. Take a look:(http://4.bp.blogspot.com/-NA104J_ZGD0/Twr4pcAgeII/AAAAAAAABn0/Eg6Qk-yyL10/s1600/060120122058.jpg)
(http://2.bp.blogspot.com/-WZsxDFSc7Ko/Twr4ZVLpO9I/AAAAAAAABnk/ESIDIB45Xgo/s1600/060120122062.jpg)
You can find more info in its webpage (http://www.abbuc.de/%7Ehardwaredoc/projekte/hardware/nun-joy-funktion/index.html), even a video :)
That's a really neat piece of hardware, and is exactly how I think hardware should be. Useful, small, compatible and simple and he's ticked almost all the boxes. But unfortunately he kept it closed source, no oportunity to build your own. Pity I don't own a Wii or Nunchuck thingy. Otherwise I'd order one.
Bryce.
Unfortunately not everybody can be Sir Bryce ;)
... but i have found a lot of info about how to communicate with the Nunchuk (http://wiibrew.org/wiki/Wiimote/Extension_Controllers/Nunchuck) (or even the Classic Controller (http://wiibrew.org/wiki/Wiimote/Extension_Controllers/Classic_Controller), a nice gamepad for the Wii, that use the same bus), it uses I2C and the protocol is not complicated, you have to initialize the device sending a sequence (0xA4, 0xF0, 0x55, 0xA4, 0xFB, 0x00) and for reading the control send another sequence (0xA4,0x00,0xA5) to get the 6 data bytes. You have more info here (http://www.musclera.com/wii-nunchuk-demonstration/), here (http://dangerousprototypes.com/2009/08/19/bus-pirate-wii-nunchuck-quick-guide/) or here (http://wiibrew.org/wiki/Wiimote/Extension_Controllers#Registers_.2F_Initialization).
It looks a very interesting expansion that i would like to have with the Bryce's seal of quality :D
Sounds like the kind of handshaking my mouse adapter does, typical for this type of device. As I said, I don't have a Nun-chuck, so it's not really that interesting for me, but good to know.
Bryce.