;; Copyright (C) 2011, 2013 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
-;; Version: 1.1
+;; Version: 1.2
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
(defvar lmc-acc 0 "Accumulator for LMC.")
(make-variable-buffer-local 'lmc--acc)
+(defvar lmc-turbo nil
+ "When non-nil, evaluate the code without extra delays.
+When nil, evaluation flashes the cursor at to help you see what's going on,
+which slows it down significantly.
+Also, when nil, evaluation is interrupted when the user hits a key.")
+
;; Emacs-22 backward compatibility.
(defmacro lmc--with-silent-modifications (&rest body)
(declare (debug t) (indent 0))
"If non-nil, memory words blink when modified."
:type 'boolean)
+(defun lmc--sit-for (secs)
+ (unless lmc-turbo (sit-for sec)))
+
(defun lmc-store-word (addr word)
(save-excursion
(lmc-addr->point addr)
(when lmc-store-flash
(lmc--with-silent-modifications
(put-text-property mb1 (point) 'face 'region))
- (sit-for 0.2))
+ (lmc--sit-for 0.2))
(let ((me1 (point)))
(insert (format " %03d" word)) (delete-region mb1 me1))
(when lmc-store-flash
- (sit-for 0.1)
+ (lmc--sit-for 0.1)
(lmc--with-silent-modifications
(put-text-property mb1 (point) 'face 'region))
- (sit-for 0.1)
+ (lmc--sit-for 0.1)
(lmc--with-silent-modifications
(put-text-property mb1 (point) 'face nil))
- (sit-for 0.1))))))
+ (lmc--sit-for 0.1))))))
(defun lmc-step ()
"Execute one LMC instruction."
"Run the code until hitting a HLT.
The machine will also stop if the user presses a key."
(interactive)
- (while (not (or (input-pending-p) (lmc-stopped-p)))
+ (while (not (or (unless lmc-turbo (input-pending-p)) (lmc-stopped-p)))
(lmc-step)
- (sit-for 0.05)))
+ (lmc--sit-for 0.05)))
;;; The LMC assembly language editor.