Code lines should be limited to 120 characters.
Every input line can be preceded by a label, which is an alphanumeric string terminated by a colon. Labels are used as targets for jump and branch instructions and as variable names in Program memory and RAM.
An input line may take one of the four following forms:
[label:] directive [operands] [Comment]A comment has the following form:
[label:] instruction [operands] [Comment]
; [Text]Items placed in braces are optional. The text between the comment-delimiter (;) and the end of line (EOL) is ignored by the Assembler. Labels, instructions and directives are described in more detail later.
label: .EQU var1=100 ; Set var1 to 100 (Directive) .EQU var2=200 ; Set var2 to 200 test: rjmp test ; Infinite loop (Instruction) ; Pure comment line ; Another comment lineNote that there are no restrictions with respect to column placement of labels, directives, comments or instructions.