Having had my Apple II+ clone in storage for a few decades I pulled it out and after some repairs have gotten it to work again.
But (almost) none of my floppy disks (5.25") work and I'm wondering if this is due to their age or if my disk drives need maintenance. What happens (after powering up or entering PR#6) is that the drive does its usual "ta-ta-ta-ta-ta" routine, but other than that I either get no further response, the computer gives me a "beep" and goes into machine code mode (monitor?) with an asterisk (*) or some disks load partly and drop into the monitor. Entering 6 followed by CTRL- P usually reboots again.
So does this sound like disks that have just lost their magnetically stored data after all these years, or a problem with the drive(s)? Or the computer? Could it be the power supply? the +12V line is a little low (around 11.5V when booting, otherwise around 11.6V).
An irony is that just about the only disk I've gotten to work so far is the diagnostic program "Apple Cillin"! I was able to go through the various tests, so if the program is trustworthy at least my RAM, my 16K RAM-card in slot #0, ROMs, CPU and (according to the program) my disk drive as well (I've only had one attached for now though I have two) all works. I was also able to initialize a floppy, but in order to actually use it, don't I also have to put DOS 3.3 on it?
I never got around to understanding ProDOS (though there's some ProDOS stuff on some disks as well), but that's how I recall it -correct me if I'm wrong.
The next step of course is to find some way of downloading software on to my Mac and transferring them over to the II+. I've read through a whole lot of stuff on the subject (too much to take in) and believe that my Super Serial card will come in handy here, and together with a USB-serial adapter cable and ADTpro I should be able to do that. But I haven't bought a USB-serial adapter yet, and haven't learnt how to actually go through the process either. I also see that I have to re-learn a lot of the basics, like how to make a floppy disk ready, how to store files on it in DOS 3.3 and so on (at least I remember the "CATALOG" and "RUN filename"/"BRUN filename" commands) ;-)