emacs backspace question

[Nerius Landys]

> Hmm...I can't figure out how to get xxd to report the keycodes, and google
> isn't really turning anything up.  Can you tell me how it's done?

It's been a while since I've tinkered with xxd.  Let's see:
1. Run xxd from command prompt.
2. Type Delete.
3. Type Enter.
4. Type Ctrl+D.
You'll see some codes before the "0a" (because "0a" is newline).
I can't remember what I did to get the Backspace codes.