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765 FDC

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/* GAPS Protection */
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=== GAPS Gaps Protection ===
GAPS Gaps was the most common way to protect floppy disks against copy on Amstrad CPC. It consists of writing specific values (other than the standard &4E) in the separation area between 2 consecutive sectors.
When the protected program is launched, it checks if these special values (most often a string signature) are present. If they aren't, the program can then crash or reset the computer or format the disk.
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