If it's an Amstrad model you can only use the special Amstrad Joysticks for it, the ports are incompatible with regular Atari Joysticks - it is just a case of rewiring a standard joystick, sacrificing it to work on the Amstrad Spectrum +2! And in the games you select the Spectrum interface!
More spectrum info can be found here: A world of Spectrum Editor / Pixelator - Armchair Arcade, Inc. www.markvergeer.nl
Here is something nice I found:


If it's an Amstrad model you can only use the special Amstrad Joysticks for it, the ports are incompatible with regular Atari Joysticks - it is just a case of rewiring a standard joystick, sacrificing it to work on the Amstrad Spectrum +2! And in the games you select the Spectrum interface!
More spectrum info can be found here: A world of Spectrum
Editor / Pixelator - Armchair Arcade, Inc.
www.markvergeer.nl
Armchair Arcade Editor