I used SST to convert the disk FORT2 to nib format..  I
have verified it works with ApplePC v2.52. I It is also a modified
version corrected to work with APPLESTUFF (as you may recall, Apple
Fortran uses the apple Pascal architecture, APPLESTUFF is a library
for turtle graphics and sound). If you want to format a new disk you
would also need to get a copy of Pascal, APPLE3.