2020-08-10 18:19:47 +00:00
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# Unlock Ben Eater Hardware
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2020-08-10 18:18:10 +00:00
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![Ben Eater EEPROM Programmer](../docs/images/ben-eater-hardware.jpg)
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2020-08-09 01:26:24 +00:00
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Utility to unlock 28C256 Software Data Protection (SDP) for the
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[Ben Eater EEPROM](https://github.com/beneater/eeprom-programmer)
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programmer design. This hardware is similar to the TommyPROM hardware, but it uses
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different shift register chips and different pin assignments.
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To meet the timing requirements of the SDP unlock, this code uses direct port writes
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2020-08-10 18:18:10 +00:00
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to set and read values on the data bus. It will work with Arduino Uno and Nano hardware,
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2020-08-09 01:26:24 +00:00
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but would require changes for other platforms.
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2020-08-09 01:28:41 +00:00
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**NOTE** that this sketch **will not** work on TommyPROM hardware. It is included here
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2020-08-10 18:22:01 +00:00
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to help people with locked chips who are using the Ben Eater design.
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