| Comments | Begin in any column with a semicolon and continue to end of line |
| Instructions and Pseudo-Instructions | Name (if any) begins in the first column. Opcode given starting in the second column or greater followed by some number of spaces and/or tabs and then a comma-separated list of the arguments (if any). |
| Labels | Begin in the first column. They start with a letter or special character [?@_$] and contain letters, numbers, and special characters. They are followed by a semicolon. |