Technology

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

Source

Tom's Hardware

Published

Nov 22, 2025

TL;DR

AI Generated

A 34-year-old Apple Mac bug was discovered by a computing enthusiast, Downtown Doug Brown, thanks to the MAME emulator revealing a crash that the original hardware did not experience. The bug in the Mac Classic II ROM code was neutralized by an undocumented feature in the Motorola CPU, which prevented the system from crashing at startup. Brown's investigation revealed that the bug was present in the ROM code itself, not the emulation software. MAME has since patched the bug, and Brown speculates that there may not be a perfect emulator or replica of the Motorola MC68030 due to this undocumented feature.

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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

TL;DR

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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

TL;DR

Similar Articles

Lexar regional manager says that RAM prices are expected to double by the end of the year — 'discounts' and stabilized prices result from distributors getting rid of old stock or sourcing products from other regions

Taiwanese startup FormulaV Line wants to break into US market with two new unique cases — company expects products to become available on Newegg later this year

G.Skill explains how AMD EXPO ULL unlocks additional performance — expanded profiles allow memory makers to include subtiming tweaks for the first time

Huawei-led team claims it post-trained DeepSeek's 1.6-trillion-parameter model — 1,000 Ascend 910C chips used in training