Fxm is the format used by Fx-Interface Pro to store any kind of data excepted backups. Fxm files are ended by .fxm

In fxm files, backup are stored in the middle of other data. For a 64ko calculator, the raw backup is from the 4218 octet to the 67705 octet (both included).

Here is a python script to extract the backup:

fxm_file = open('backup.fxm','rb')
ctn = fxm_file.read(67706)
fxm_file.close()
 
bak = ctn[4218:]
 
raw_file = open('backup.cafix','w')
raw_file.write(bak)
raw_file.close()
 

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