Apple II DSK-to-NIB and NIB-to-DSK image file conversion utilities.
Run make clean all to produce the dsk2nib and nib2dsk executables.
Some Apple II games use the disk volume number to represent the disk number in a multi-disk set. The dsk2nib command is useful in this case, since the volume number is only present in a NIB image.
dsk2nib shadowkeep4.dsk shadowkeep4.nib 4
nib2dsk silicon.nib silicon.dsk
I wrote these utilities in the early days of Apple II emulation, and only recently decided to make them buildable under macOS/Linux.