In article , Theusch wrote: > I would like any and all information pertaining to the file format of .dsk > image files. They are just dumps of the contents of 140K 16-sector 35-track Apple II diskettes. > Specifically, I want to know how to tell where files start and > end, so I might make a program to add and extract files to/from .dsk files. This is OS dependent: does the .dsk image contain a DOS 3.3 disk? An Apple Pascal disk? An Apple CP/M disk? A ProDOS disk? A Flex disk? On http://hotel04.ausys.se/pausch/apple2 you'll find portable C source code to FID, a little utility which allows you to view and optionally extract the contents of a DOS 3.3 .dsk image. It compiles on any ANSI C compiler. -- ---------------------------------------------------------------- Paul Schlyter, Swedish Amateur Astronomer's Society (SAAF) Grev Turegatan 40, S-114 38 Stockholm, SWEDEN e-mail: pausch at saaf dot se or paul.schlyter at ausys dot se WWW: http://hotel04.ausys.se/pausch http://welcome.to/pausch