As shown, a subprogram's entry point is codice_10, an assembler pseudo operation that is used to Define a Constant (occupying one word of storage) with the value specified by the expression. The * stands for the current address of the assembly and so *-* results in zero. Writing this rather than 0 provides a visually distinctive note that a meaningful value (the return address) will be placed there at run time. The entry point need not be the first word of the subprogram. Indeed, the preceding word can be the start of a two-word direct branch instruction whose address field is at SIMPL. Then, returns can be effected by one-word branches there: codice_11