I find that if I boot up my machine (520, TOS in ROM) with a joystick
attached to port 2 (the non-mouse port) the machine comes up with the
keyboard effectively disabled, and I have to unplug it and reboot. If
I plug it in after the machine has booted, everything is happy.
Admittedly, it's an '8-bit' Atari joystick model, but still...
Anyone else seen this? Have any clues? Helpful hints and suggestions?