These Bin files are for A spectra MLM to up grade the MLM to Ver 6.16 which can
 give the radio such added features as Zones if the user can also
 Bit Bang the correct moflag locations in the EEprom.  
if you look at the board with a 27c512  on one end and a 28c64 EEprom on the other side.
the 1 and 2 refer to the 27c512 chip locations chip 1 is on the outside and 2
 in the middle and the 28c64 EEprom on the other end
 