Dumping contents from MC68701

Al Kossow aek at bitsavers.org
Sun Feb 17 10:26:11 CST 2019

it depends on the version of 68701

P3 has no protection P5 does

a P3 can be read with a Data I/O Unisite


The P5 is more involved. You put it into factory test mode, feed it a NOP instruction
and it will output the rom data on the I/O pins.

A variation of that will work on other parts in the series.

On 2/17/19 7:57 AM, Kyle Owen via cctalk wrote:
> Has anyone been successful in dumping the EPROM contents from an MC68701?
> As I understand it, this MCU requires executing a particular program from
> external memory to access the internal EPROM, both for programming and
> reading.

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