>> Which hex editor shows a line of hex with the corresponding ASCII under the
>> line of hex ?
> I suspect that it shouldn't be too hard to get something working if you
> start from nhexl-mode in Emacs:
And indeed, I just added a `nhexl-separate-line` user config to
nhexl-mode to do that. Just add
(setq nhexl-separate-line t)
to your ~/.emacs and that should do the trick.
Stefan