Saves a section of memory at a specific point in a file.
Ssave channelnumber, startaddress to endaddress
Channel number is the number of a file you've opened previously with the OPEN IN File_Number,"Name" instruction.
startaddress is the address of the first byte to be transferred.
endaddress is the address of the final one.
The data is saved starting from the current file position, as returned by the POF function.