Amiga Joysticks - Where are the pots and buttons fed from?

[Hodgkinson]

As the title says, I can see from the A1200 manual where to connect potentiometers and buttons to on the mouse/joystick port, but where are the buttons and potentiometers fed from? +5v or ground?

I’m just in the process of knocking together two joystick adaptors…I’ve just been and bought some cable from Maplins in Sheffield this evening and I already have the D connectors and shells from Rapid Electronics (*OMG* Maplins are getting expensive for electronic parts…)

Thanks,
Hodgkinson.

[Hodgkinson]

Thanks for the replies.
So the buttons and pots sink to ground?

Im making two adaptors cos' I can :-D Mainly so that if I want to swap the mouse for a joystick, say using a autoswitcher, then I've got enough adaptors to do it.

I've also got a box full of 20 brand new mini joystick X/Y units with contacts for up/down/left/right that I bought from Greenweld as a pack for £5; so they might get pressed into use on somthing one day.

Regards,
Hodgkinson.

[Hodgkinson]

Ah ha. Thanks for the info!

I was thinking that it might be more like a PC gameport where the potentiometer is wired as a variable resistor and connected up to +5v.
Having said that the Commodore method makes much more sense!

Thanks,
Hodgkinson.

EDIT: Do the up/down/left/right buttons work at the same time? Or are they mutually exclusive with the pots?