Output the stored contents in ROM according to the address sequence by referring to the chip dyeing photos on the 0/1 code extraction in ROM and combining it with the analysis of the decoding circuit, and burn the read contents to an OTP chip.

Find the key circuit or encrypted circuit through the circuit analysis of EPROM/flash decoding, and use the FIB circuit’s modification function to shield the encrypted circuit and read the program in EPROM/flash.