A Emacs mode for newLISP that I found somewhere and am tweaking, as needed.
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000contrib.txt
0readmefirst.txt
README
dmode.el
newlisp.el
readmesometime.txt
tj-parenface.el

README

;; Quickstart

;; Download newlisp-mode:
$ git clone https://github.com/may/newlisp-mode.git

;; Place this in your .emacs to get up and running with newlisp-mode.
(load-file "~/newlisp-mode/newlisp.el")
(add-to-list 'auto-mode-alist '("\\.lsp$" . newlisp-mode))

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;; The above will unconditionally load newlisp-mode on every startup.  If you'd
;; rather wait to load it until you actually need it, use this instead:
(add-to-list 'load-path "~/newlisp-mode") 
(autoload 'newlisp "newlisp" "Major mode for newlisp files" t)
(add-to-list 'auto-mode-alist '("\\.lsp$" . newlisp-mode))


;;;; Things that might make life easier:

;; Make Emacs' "speedbar" recognize newlisp files
(eval-after-load "speedbar" '(speedbar-add-supported-extension ".lsp"))

;; Another way to use C-x C-e to eval stuff and doesn't jump to next function
(define-key newlisp-mode-map [(control x) (control e)] 'newlisp-evaluate-prev-sexp)

;; I think I got tired of typing 'newlisp-show-interpreter' all the time.
(defun start-newlisp ()
  "Starts newlisp interpreter/or shows if already running.  Requires
newlisp-mode to be loaded."
  (interactive)
  (newlisp-show-interpreter))

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Please note -- I just found this code somewhere, got it to work and am documenting what I've found and any fixes/improvements I make here in case someone else finds them useful.

- Nicholas E. May