Stolen From Apple

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Stolen!! © Apple

The Macintosh development team was inspired to take a peculiar anti-pirating step after Apple's experience with Franklin Computer's cloning of the Apple II. A 32×32 icon was developed and placed in the ROM in such a way that it was very hard for someone reverse-engineering it to locate. This allowed Apple personnel who knew of it to give the suspected clone a command to print a certain memory address causing the icon to appear if the ROM had, in fact, been cloned.[1]

It exists at memory location $40AD40.[2]

References

  1. Stolen From Apple
  2. "Stolen From Apple Computer"
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