How to Interactively Run Gforth Inside Emacs

By Jim Brooks  www.jimbrooks.org/forth/

2. Download and install Gforth.

3. Copy gforth.el from the Gforth source tarball to whatever directory you want
   (I chose ~/misc/gforth.el).

4. Add this emacs LISP code to your ~/.emacs file:
   (substitute /misc/gforth.el with your choice)

    
   (defvar HOME (expand-file-name "~"))
   
   ;; ------
   ;; FORTH
   ;; ------
   (defvar GFORTH_EL (concat HOME "/misc/gforth.el"))
   (cond ((file-readable-p GFORTH_EL)
     (load-library GFORTH_EL)
     (autoload 'forth-mode GFORTH_EL)
     (setq auto-mode-alist (cons '("\\.fs\\'" . forth-mode) auto-mode-alist))
     (autoload 'forth-block-mode GFORTH_EL)
     (setq auto-mode-alist (cons '("\\.fb\\'" . forth-block-mode) auto-mode-alist))
     (add-hook 'forth-mode-hook (function (lambda ()
       (setq forth-indent-level 4)
       (setq forth-minor-indent-level 2)
       (setq forth-hilight-level 3))))
   ))
   

5. Run Gforth inside emacs:

    
   M-x run-forth

   The emacs window should split with Gforth running in the bottom.

6. Load your file containing FORTH source code.
   Or, if you want to type FORTH words interactively,
   create a new emacs buffer and change its mode to FORTH by:

    
   M-x forth-mode

7. Select (highlight/mark) the source code you want to paste into the FORTH interpreter,
   then type (don't switch emacs buffers):

    
   M-x forth-send-region   (or  C-c C-r  which is  Ctrl-c Ctrl-r)

   This should pipe FORTH commands to the Gforth process running in the bottom window.
   

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