On some consoles, the seeprom.bin stores the region code (US, JP, EU). Editing it (after removing checksums) can change the region, though modern consoles now bind region to OTP.
In the world of hardware hacking, firmware reverse engineering, and console repair, few file pairs evoke as much curiosity and caution as otp.bin and seeprom.bin . If you have ever extracted a full NAND dump from a router, a gaming console (like the Nintendo Switch or PlayStation), or a high-end FPGA board, you have likely encountered these two cryptic filenames.
# For external SPI flash containing both dd if=/dev/mtd0 of=otp_backup.bin bs=1k count=64 dd if=/dev/mtd1 of=seeprom_backup.bin bs=1k count=128
