FileStore Floppy Disc with ADFS
Fast-forwarding a bit to &50E, and &50F, shown here, we at last see the AFS0 sector and copy. This means that FileStore discs are interleaved!
The first track is on side 0, and then the second track is on side 1, so to look at it within ADFS, we have to add on a whole side's worth of sectors to look at it. FileStore logical sectors &1E and &1F are ADFS physical sectors &50E and &50F!
Now that we know that, I can have another go at understanding a FileStore floppy, another day!