Neither of my Disk ][ drives will read any disks. I've had this problem before; replacement of the 74LS125 on the analog card solved it then. I tried a similar thing today, but the problem persisted.

For what it's worth, I noticed that the impedances of Drive 2's head are higher than they should be according to Sams Computerfacts.

The Apple III owner's guide includes a schematic but
the Apple Color Composite and Apple Color RGB do not.
Purposeful left out?
Does anyone know if there are schematics for these
monitors?

I have looked at

mirrors.apple2.org.za./ftp.apple.asimov/documentation/hardware/schematics/

and they are not there.

Not sure everybody has seen the last announcement regarding ProDOS 2.4.x

http://www.callapple.org/vintage-apple-computers/apple-ii/announcing-prodos-2-4-2-for-all-apple-ii-computers/

anyhow... I'm not able to switch to the 80 character mode... as the system always booting the Bitsy.boot file...

Is there anybody that could give my some hints booting ProDOS 2.4.2 in 80 character mode, please ?