 Some software ignores all text lines that do not start with "S" and ignores all text after the checksum field; that extra text is sometimes used (incompatibly) for comments.For example, the CCS PIC compiler supports placing a ";" comment line at the top or bottom of an Intel HEX file, and its manuals states "some programmers (MPLAB in particular) do not like comments at the top of the hex file", which is why the compiler has the option of placing the comment at the bottom of the hex file.The following example record