The Diskette Workshop
Copy Protection is only possible because the standard PC floppy controller can be programmed to numerous format variations. Almost all these format variations can be detected by The Diskette Workshop. Even the most hidden and odd variation cannot deceive the PHASE test.
It is very valuable to know how a copy protection scheme works. This enables one to qualify the scheme. It is important because many copy protections are quite inferior and do not consider the problem they cause the honest, paying customer. Many protections use phase shifts, port programming and similar which all fail under multi-process OS such as OS2, Win95 and PowerPC.