Checksum inside Altera FPGA.jic file

Question

I am modifying the firmware file (.jic) An indirect JTAG configuration file with a small algorithm, but changing the data inside the file makes it unusable because there is a checksum somewhere in the file that needs to be updated.

I need to find where the checksum is inside the .jic file and decrypt which algorithm is used (crc32, etc.).

The bits on each byte are reversed, and I checked the normal and reverse bits of the file without success.

Does anyone know or is there a way to find out where the checksum data is inside the .jic file?

Answer 1

, .jic (, Quartus), .jic ( .jic). , ( )

Answer 2

.jic. , , .hex .mif, quartus_cdb --update_mif . ( IDE "" ".)