Files referred to are:

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DISKSTAT gives you a lot of useful information about the format of the floppy drives on your computer. It works with CP/M 2 or 3.

CCP+ is a replacement command processor for CP/M 3. It is designed to look like the Z-System and has named directories, time in the prompt etc.

P2DOS is a BDOS replacement for CP/M 2. A later version of it is SUPERDOS, but the documentation does not make clear how these two differ.

Z80DOS is a BDOS replacement for CP/M 2, based on P2DOS and SUPERDOS. There are three versions which can be retrieved:

DOS+ is a BDOS replacement for CP/M 2.

NovaDOS is a BDOS replacement for CP/M 2, based on P2DOS and SUPRBDOS.

ZPM3 is a BDOS replacement for CP/M 3. ZCCP is a matching command processor replacement which implements the Z-System.