What is so hard about using google?
hex + file + compare + program

First hit is what you want

http://www.getsomesoft.com/Development/Web/6382-HexCmp.html

and a subsequent reference confirming that it reads intel hex.

http://www.fairdell.com/patchfactory/
HexCmp 2 (2.2.0.6)
Added:
-  add hex-file support Intel format(read only).
                                                                           -
fixed scrolling bug, when open single file.

(12-September-2003)

OR

http://www.picbasic.co.uk/support_tools.php

PICHEX A package for manipulating Microchip PIC16C84 hex files.

This package provides a suite of programs for manipulating Microchip hex
files. The software is designed for the type of hex dump used to program the
PIC16C84; these are based on Intel hex format and integrate into a single
file all the information needed to specify the contents of the PIC16C84
program memory, data memory, ID words and configuration word. The

ICHEX package can perform the following operations:
Convert INHX8M files to INHX16 and vice-versa.
Convert between INHX8M and John Morrison binary.
Combine separate program and data hex files.
Split an integrated hex file into separate files.
Add/replace a configuration word.
Add/replace a 4-word ID record.
Identify which areas of a hex file are present.
Compute a file checksum using Microchip's own algorithm.
Build a data hex file from a free-format hex list.
Dump a data hex file as a hex list.
***>  Intelligently compare two hex files.

AND SO ON FOR A FEW THOUSAND OTHER HITS.

Robert

Jan-Erik Soderholm wrote:
>
> Hi.
> Does anyone know of a tool to compare two HEX files ?
>
> The problem with using "normal" file compare tools, is that
> two HEX files could look different, but they could still be
> functional the same. The reason is of course that different
> things (memory sections) in the HEX file don't have to come
> in any special or fixed order. As when using one HEX file to
> flash a part, and then reading back the contents to a new
> file.
>
> I need a tool tool that  knows how to read and interpret
> the HEX data from two files and report any differences.
>
> Best Regards
> Jan-Erik.

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