s-record fpecifications

It's probably not the full spec, but

I like "fpecifications", it's so 17th century...

LOL

That was my first thought as well ;-)

Please use Google before the Usenet groups.

One reason for your training is to learn to search the answers yourself and not pushing the work to others.

A Google of 'S-record' gave about 1.2 million hits, with the second:

pretty good.

Al.

Tried this site and found 3 references. Two of them don't agree with one another about the record length value and the third had a bad URL.

Yes, one link is bad, but the other two both agree. One page refers to "character pairs" meaning the two hex characters that represent a byte of data and the other refers to just "bytes" which means the bytes of data (including checksum). I have seen many pages refer to the data either way, as bytes or as character pairs.

There are better pages describing S records, but the OP should be capable of finding them using any search engine. Just so it is easier to tell when you have found a page that is fairly complete, there are multiple types of S records. S0 is a header with info (not well defined or universally used). S1, S2 and S3 are data records with 2, 3 and 4 byte address fields. S9, S8 and S7 are the start address records to match, respectively (S1 goes with S9, etc). S5 is a count of the number of data S records. I think that is all of them.