• BASIC 1.0: The original one, as run by the TO7, TO7/70 and MO5. Does not handle memory banks. Available on newer machines for compatibility purposes.
• BASIC 128: For TO7 and TO7/70 with memory expansion, or for MO6. The TO cartridge can also be run on TO9 and TO8(D).
• BASIC 512: For TO9 and TO8(D). Can handle all the available RAM, but who writes so huge BASIC programs anyway?
• DISC BASIC: For MO5 with floppy interface. Must be loaded from disc. Extends the BASIC 1.0 with extra commands that could not be fitted into ROM, including all the disc management stuff.

• LOAD and RUN are used to load BASIC programs. Nothing special here
• LOADM is used to load binary files. The syntax is LOADM “FILENAME”,,R
  • When working from tape, the file name can be an empty string (“”) to load the first file found
  • The binaries have headers with the load and execute addresses, so you don't need to specify those when loading.
  • Adding ,,R after the filename tells the computer to load the file and immediately jump at the execution address. Otherwise you get back to BASIC.

• The DISC BASIC itself is auto-booted from a floppy (if present) when the machine starts. In case you want to load it yourself you can boot a floppy using the DOS command.
• When booting, if a BASIC file named AUTOEXEC.BAT is found, it will be executed immediately. You can use this to make autoboot floppies. Start with a copy of the DISC BASIC disc and add your own files.
• Otherwise, the load and save commands work as usual. You can use drive identifiers: LOAD“0:FILE.BAS”. Drives 0 and 1 are the two sides of the same floppy, drives 2 and 3 are the other floppy drive, if present.

Most of the time it is enough to press the B button on the menu to boot a disc and run AUTOEXEC.BAT on machines with BASIC 512.