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P.S. - You mentioned using SYSTEM1.IMD. According to the A74015A AMPRO Z80 Hard Disk Software Users Manual 1985.pdf you may need to SYSGEN a system disk with a smaller TPA in order to have a bootable floppy image that supports a hard disk.

There are links but the site treats them oddly. Not sure why. Perhaps to block bots or copying? In any case, I've found I either have to right-click and "open in new tab" if the link is pointing to another site, or right-click and select "Save File As..." if the link is a direct download...

I didn't realize that you were trying to create an empty filesystem. (The 'strategic places' comment threw me.) Filling the directory blocks with E5 will certainly do that. E5 as the first byte of a directory entry (the user number) is the documented "empty/unused' value. E5 for that plus the...

techtinkering.com has some good comparative reviews and advice on various classes of CP/M utilities. Very informative. Choose your own favorites. E.g.: https://techtinkering.com/articles/dir-alternatives-on-cpm/ https://techtinkering.com/articles/image-viewers-on-cpm/...

Sounds very interesting. Great work! I have an actual Ampro Little Board (non-plus version) and have been writing a gui-based W10 C# program for accessing Ampro floppy disk Images from .IMD and CP/M 2.2 images in general. It presently loads .IMD files for Ampro CP/M 2.2 as well as other CP/M 2.2...

Here are a few pix of my system.