Actually, ccs help file says the directive can place comments at the top=20 or bottom of the file. #HEXCOMMENT text comment for the top of the hex file #HEXCOMMENT\ text comment for the end of the hex file The second directive has a backslash in it. Back to the original issue, how would this be used? Serializing was=20 mentioned; could it be that a tool reads the address of the serial=20 number address from the comment, generates a number and inserts it at=20 that address? Curious because I created a software tool to serialize parts, but the=20 address of the serial number was known to the tool, and did not need to=20 be embedded in the hex. Joe W On 11/30/2011 12:07 AM, Forrest Christian wrote: > Yep, > > CCS generally puts at least the processor in the file at the end with a > line like: > > ;PIC18F26K20 > > It also allows you to add additional lines... they all appear at the > end, after the EOF mark... > > > On 11/29/2011 9:37 PM, Harold Hallikainen wrote: >> Interesting concept. Do most hex file readers (including bootloaders) >> just ignore a line that doesn't start with colon? I typically have a >> state machine that does not advance until I see the start of line >> colon in Intel hex. Harold --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .