I've read Your post:http://www.worldofspectrum.org/forums/showpost.php?p=618823&postcount=91 but I'm not sure - after required fix for keyboard and EAR, will be Sinclair joysticks work or not?
Yes! The fix will enable keyboard and EAR again (chosing VRD disabled both ports). The fix changes VRD by VCS. After that, EAR and keyboard are enabled again, and besides, you will be able to use Sinclair joysticks, programable joystick interfaces, or external keyboard interfaces.