VDP probing tools?

You see two things on the screen.

The first files are part of creating a (copy-protected) diskimage for openMSX.
The tool (written by Wouter) is capable of storing all the low level track-info of the original disk. So the copy protection remains intact and you can run those disks in openMSX without resorting to a hacked/cracked version.

The second files are indeed some of the VDP probing tools here. Newer PC's come without a floppy interface so the openMSX crew had to do some elaborate transfering to get the files from USB stick to actual disks for the real hardware.

It describes the working of VDP-SODO.COM not shown in this image