Dear friends, it finally works!
Today I was going to test the system clock to report to Maryjan and before doing this I took the WD1770 out of the socket to see how to connect to pin 18. After doing this I tried to read the directory of a floppy of my old Opus and ... Now it works!!!
So it could have been some bad contacts, however I was unable to go beyond reading the directory.
Then I remembered that almost all of my floppies were formatted and written to the original Opus SD drive. I used the 720K drive (DD) and this was the mistake.
So I decided to clean the heads of the old floppy and give it a chance too.
And it did not disappoint me, after almost 30 years it reads almost all the floppies of the time.
I enclosed some screenshots of few software I wrote 30 years ago!
Now I want to recover the files, I have to connect a modified Gotek to use Flashfloppy in addition to the original drive.
So I believe it is possible to transfer images from a physical disk to a Gotek .OPD image.
Do you have any indications for this operation? Gotek should be set as DS1 right?
If you are interested, I will keep you informed about this operation.
Meanwhile, many thanks again for your help and congratulations to Maryjan for making a beautiful piece of hardware!
Cheers
Claudio