A 34-year-old Apple Mac crash bug ‘would have gone undiscovered for all eternity,’ but the accuracy of the MAME emulator shone a light on it

A computing enthusiast unearthed a 34-year-old Apple Mac bug that should have crippled the system at startup, but it never did, thanks to an undocumented feature in the Motorola CPU that quietly neutralized the flaw. Downtown Doug Brown discovered this Mac Classic II ROM code wrinkle after witnessing a MAME-emulated system crash (in 32-bit mode) that the original hardware would not (h/t PC Gamer). We tend to agree that “this bug in the ROM would have gone undiscovered for all eternity” if it were…