Here's a very simple vbs script ('cut.vbs') that may help you to achieve what you need.
Please find inside the attached archive (vbs-cut.zip):
1. Files:
ReadMe.txt   - this file!
fire.lst    - a sample output list file created with an assembler (NASM in this case)
hexa_codes.txt  - the hexacodes stripped off from 'fire.lst'
2. How to use 'cut.vbs':
Execute it in a dos command prompt, like this:
"cscript cut.vbs > hexa_codes.txt
3. Test it with the provided sample first.
4. Adjust the parameters (which depend on your 'lst' output) inside the script (open it with Notepad)

Hope it helps to get you started.

Caveat: Because this was generated with 'Windows Script Host' you still need to delete the first 2 lines of 'hexa_codes.txt' (not a big deal?)

... "Chemin d'accès introuvable". Could this be because I have spaces in the path ?

Well, that could well be the case, to be honnest, i dunno. But the 'Windows Script Host' is rather funky indeed. Take it as a 'proof of concept' only and learn to live with its shortcomings.
Of course, a much better utility can be written but that also requires some spare time, which atm i don't have.

Quote from: Hayleia

... "Chemin d'accès introuvable". Could this be because I have spaces in the path ?

Well, that could well be the case, to be honnest, i dunno. But the 'Windows Script Host' is rather funky indeed. Take it as a 'proof of concept' only and learn to live with its shortcomings.
Of course, a much better utility can be written but that also requires some spare time, which atm i don't have.

Wow, something weird happened here, I remember editing my previous post twice but I don't see those edits anywhere
I was saying that the problem doesn't come from spaces, I tried in another folder with spaces and it worked like a charm.
Anyway, it works in certain conditions, I'll just find a place where it works and where it doesn't bother me. Thanks for the utility

edit In fact I just messed things up and wrote my edits in the wrong post lol

Also, it seems that ClrHome is down, so I am thinking Deep Thought is too busy

Yeah, this is another reason why I wanted an offline solution. They always work (except when Microsoft makes stupid updates).

As I said in a PM you might be able to use this: http://www.ticalc.org/archives/files/fileinfo/168/16869.html

I've never used it myself but it looks relevant enough. (It's an unsquisher so it'll extract and display the ASCII hex.)

EDIT: Yeah, ClrHome is down because my PayPal derped and I need to renew my domain I'm trying to get it up now, sorry about that.

The hex listing function in asm studio 8x exports a text file of the program in hex. Your program would have to be called test.asm I think.

I believe you can change the function to support different names. It might not accept arguments, but at least you can write something that will and use the function. Idk. I haven't used it in ages.

OK, thanks all for the solutions, I'll try them all and see which one I like best ^^