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A computer aficionado has unearthed a long-concealed bug nestled within the ROM code of the Apple Mac Classic II, a flaw that had remained dormant for a staggering 34 years. This particular vulnerability had the potential to wreak havoc, causing system boot failures. However, it never manifested in real-world hardware scenarios, thanks to an undocumented characteristic of the Motorola 68030 CPU. This intriguing discovery sheds light on the intricate, often unseen, interplay between hardware and firmware design. It highlights how the unique processing mechanisms of the 68030 CPU inadvertently served as a shield, concealing defects in the ROM code and thus averting the activation of this critical vulnerability over more than three decades of active use.
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