The original disk of Giana Sisters can be copied with any quickcopy. To remove the protection just run once this basic program:
10 open1,8,0,”1″
20 open15,8,15
30 print#15,”m-w”chr$(4)chr$(4)chr$(1)chr$(44)
40 print#15,”m-w”chr$(1)chr$(0)chr$(1)chr$(144)
50 close15:close1
To rebuild the original protected disk (and obtain a clean master), type and start the basic program and the result is a perfect master of The Great Giana Sisters. Mission accomplished.
The basic programm will write the protection track on track #36.
The protection consists of an empty track containing only a SYNC of a length between 110 and 113 bytes.
Therefore the best length for maximum compatibility is 111 byte and a half.
Source: Github.com