after fixing a small bug with disks having only few sectors per track, more disks are loaded fine

[Linked Image from mamedev.emulab.it]
[Linked Image from mamedev.emulab.it]
[Linked Image from mamedev.emulab.it]

some disks unfortunately sit in a black screen after loading (e.g. Hokuto no Ken, and a few more), but at least we can now load the images

next tasks, before commit, are loading disks in NFD Rev.1 format and see whether some disks still failing can be easily fixed... stay tuned wink