SUPERDOS

SuperDOS V5.1 was designed for the more advanced user who needs a DOS 
with true double sided, double density operation. The aim was to keep 
the program short and powerful. Until now Atari DOS 2 seemed to be the 
most convienient DOS to use but was only capable of single density and 
was memory inefficient. Other double density DOS's are available but 
they use heaps of memory or are extremely slow because you need to load 
a file to perform each function.