Apple II

I've been doing a lot of disk-related activity lately (transferring disk images via ADTPro, formatting and testing disks) which has worked fine until recently.

The first thing I noticed was that I got a strange disk-seek sound (a "wiggle" of sorts I can describe it like that), and several disks (transferred from my Mac via ADTPro) gave that behaviour and couldn't proceed loading the content. So I disconnected that drive (I have two 5.25" drives), but now I'm getting it on the other drive as well with some disks. At the moment I only have one drive connected to the drive card.

I've searched the web without finding anything but alternative joystick interfaces or just the game connector pinout: where can I find a schematic of a standard Apple II joystick?

My Apple "Joystick II" isn't working and I can't quite figure out why (the switches and pots work) so the only thing I can think of is that a wire must have broken loose and I've resoldered it in a hurry, in the wrong place :-(

I believe there were several alternatives to Apple's DOS 3.3 back in the day, resulting in faster file-loading, more free space and other features. But after all these years away from the Apple II memory (mine that is) is lacking on the subject, so a few questions:

Hi Everyone,

Using Apple II software diagnostic tools to test a Disk II floppy drive. Interestingly trying to calibrate the disk speed the unit is returning 0 RPM (but you can hear the drive actively seeking and the red light on front of drive is illuminated). I was hoping someone might be able to point me in the correct direction of what part of the circuit is responsible for calculating drive speed.

Thanks all!