GameCube Controller Question

[Nick]

Does the signal/data pin running off the GameCube controller need to be shielded or will a non shielded wire work fine?

 

[cheese]

Moved (as it pertains to GameCube specifically), @Aurelio would probably know, he's done some work with GameCube controllers.

 

[Aurelio]

The Gamecube controller data signal is pulled up with a quite low resistor (around 700 ohms) so it's quite strong and electromagnetic noise shouldn't be able to change it's status.
So no, you don't need it.

 

[ShockSlayer]

If you removed the resistor and didn't use shielded wire, what would noise affecting the signal look like? Dropped inputs, erratic joysticks, etc?

 

[Aurelio]

If you removed the resistor and didn't use shielded wire, what would noise affecting the signal look like? Dropped inputs, erratic joysticks, etc?

You can't remove the pull-up resistors for the controller data line. It's an open-collector protocol (just like the i2c) so the two systems (i.e. the gamecube/wii and the controller itself) can only pull down the data line and to set it high they just "leave it" as it is and let the pull-up resistor do its job.
The resistor is not there to protect from noise, it's there because it is needed for the communication to work properly