This requires a custom firmware written on the device

Want to easy dump a bootrom from a MH190x device? Install the firmware under firmware:

pio run -t upload

And dump the bootrom from the device:

cd cmd
go run . /dev/ttyUSB0 --readmem 0x0 131072

• Bus Fault Handler - In case you want to dump more stuff (like all OTP data)
• Simple interface

• FW: Initialize all hardware so it can be used to dump any memory
• Add uploader to go code
• Add pre-built firmware to go code
• Add binary releases to github
• Change firmware to run from RAM (allowing it to be used for dumping flash memory)

If you dump any bootrom, please let me know. I'm collecting those. Maybe I should create a repo with them :)