Each binary image is for the binary program for the EEPROM on the Primer Trainer-
-T600-S0BA_044__PRMBAS44.BIN is MTBASIC 
-T600-S0FO_012__PRM4TH12.BIN is E-FORTH
-T600-S0MO_027__P_MOS27.BIN is MOS
-T600-S1MO_020__PEMOS200.BIN is EMOS