How did you dump the internal rom off of the MCUs?

nukeykt / Nuked-SC55

Roland SC-55 series emulation

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How did you dump the internal rom off of the MCUs? #41

Closed nikitalita closed 2 months ago

nikitalita commented 2 months ago

I had tried to do this a while back by attempting to modify the control rom to dump the contents of the internal MCU ROM during a DUMP ALL INSTRUMENTS command through the MIDI out port, but I could never get it to work.

Karmeck commented 2 months ago

https://twitter.com/nukeykt/status/1752965047179981212?t=GLiMbIyF8ZYgI63yEdVqtQ&s=19

nukeykt commented 2 months ago

hitachi mcu was dumped by injecting dumper code to conrol ROM and read using logic analyzer. mitsubishi was dumped by injecting dumper to RAM and executing it using power glitching