Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!amdahl!pacbell!cogent!uop!mrapple
From: mrapple@uop.edu (Nick Sayer)
Newsgroups: comp.os.cpm
Subject: Sigh... here we go again
Message-ID: <1739@uop.edu>
Date: 17 Nov 88 18:18:04 GMT
Organization: Amateur Radio: N6QQQ
Lines: 23

It's me again. This time I'm interested in the format of a
.HEX file. I've noticed this:

:1001000000112233445566778899AABBCCDDEEFFxx
| |  |  ||------------------------------| |
| |  |  |              |                  checksum?
| |  |  |              data bytes
| |  |  zero byte
| |  address
| number of bytes in data field
required ":"

:0000000000 marks EOF

The questions are this: Is there a purpose to the zero byte
before the begining of the data field? How do you compute the
checksum on the end of the line?

---------------------------------------------------------------------- 
Nick Sayer | Packet Radio: N6QQQ @ WA6RDH | Fido: 161/31
uucp: ...!sdcsvax!ucbvax!ucdavis!uop!mrapple
Disclaimer:   You didn't REALLY believe that, did you?
cat flames > /dev/null