The Casio Cash Register have around 7 modes of programming that I know of, they are:
Program mode 01
For entering numerical values.
Program mode 02
For entering numbers, letters, and symbols.
Program mode 03
For modifying the machine's behaviours.
Program mode 04
For modifying on how the machine's keys behave.
Program mode 05
For accessing the machine's files.
Program mode 06
For printing the machine's programs.
Program mode 07
For programming the machine's system tools.
