![]() He’s currently digging into the firmware, using IDA and a custom disassembler he wrote for the Mitsubishi M7700 family of MCUs. Advantest R4945A EPROM Duplicator c.1980s A few minutes of Googling reveals the ASCII pinout of the 27C256 EPROM, and he whips out an Arduino Mega and wires it up to the chip and is off and running. After a false start trying to use the serial port on the back of the PROM copier, he brute-forces it. This tweaked ’s curiosity, and he wondered if he could obtain the contents of the Civic’s mysterious PROM. These days he uses it to maintain a backup collection of old ECU chips from cars he has worked on. pulled out an old PROM duplicator stashed away under the counter which he originally used as a kid to copy PROM chips from console games like the Famicom. took his Civic to a shop to have some burned-out transistors replaced in the ECU, and a chance conversation with the proprietor sends him on a journey into the world of old EPROMs. ![]() ![]() Making things more interesting each one has a tuned EPROM, the Civic’s being of completely unknown origin. ![]() Both the 1996 Integra and the 1993 Civic have similar engines but different ECU hardware. He recently began to delve into the Engine Control Units (ECUs) of the two old Hondas that he uses to get around in Japan. Automotive security specialist by day hacks his own cars as a hobby in his free time.
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