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eprom_dump [2017/05/29 20:42] – clean up table, and capitalization of acronyms. add note about damaged chips lord_nightmare | eprom_dump [2019/08/14 23:21] (current) – removed mcmaster | ||
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- | Techniques for dumping bit-rotten and/or damaged EPROMs: | ||
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- | Bit-rotten roms are EPROMs/ | ||
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- | There are several techniques to try to recover bit-rotten data like this: | ||
- | * Change temperature. Ex: People have reported success using a hair dryer or heat-gun on parts. This seems to work better than freezing parts does, maybe by ' | ||
- | * Lower reference voltage: Lowering the VCC/ | ||
- | * Multiple reads and binary ANDing or ' | ||
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- | Combining 2 or more of these techniques is significantly more effective than using them separately, so people have had much better luck both heating and simultaneously under-volting chips than doing either one separately. | ||
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- | Damaged Chips: | ||
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- | There are more or less two classes of damage to an IC which will prevent it from reading: Damage to the leadframe and bond wires, and damage to the die itself. | ||
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- | Heat might help for leadframe/ | ||