diff --git a/ncurses/base/lib_scroll.c b/ncurses/base/lib_scroll.c
new file mode 100644
index 0000000..ac85bd5
--- /dev/null
+++ b/ncurses/base/lib_scroll.c
@@ -0,0 +1,150 @@
+/****************************************************************************
+ * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Thomas E. Dickey 1996-2003                                      *
+ *     and: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+/*
+**	lib_scroll.c
+**
+**	The routine wscrl(win, n).
+**  positive n scroll the window up (ie. move lines down)
+**  negative n scroll the window down (ie. move lines up)
+**
+*/
+
+#include <curses.priv.h>
+
+MODULE_ID("$Id: lib_scroll.c,v 1.26 2006/10/14 20:46:08 tom Exp $")
+
+NCURSES_EXPORT(void)
+_nc_scroll_window(WINDOW *win,
+		  int const n,
+		  NCURSES_SIZE_T const top,
+		  NCURSES_SIZE_T const bottom,
+		  NCURSES_CH_T blank)
+{
+    int limit;
+    int line;
+    int j;
+    size_t to_copy = (size_t) (sizeof(NCURSES_CH_T) * (win->_maxx + 1));
+
+    TR(TRACE_MOVE, ("_nc_scroll_window(%p, %d, %ld, %ld)",
+		    win, n, (long) top, (long) bottom));
+
+    if (top < 0
+	|| bottom < top
+	|| bottom > win->_maxy) {
+	TR(TRACE_MOVE, ("nothing to scroll"));
+	return;
+    }
+
+    /*
+     * This used to do a line-text pointer-shuffle instead of text copies.
+     * That (a) doesn't work when the window is derived and doesn't have
+     * its own storage, (b) doesn't save you a lot on modern machines
+     * anyway.  Your typical memcpy implementations are coded in
+     * assembler using a tight BLT loop; for the size of copies we're
+     * talking here, the total execution time is dominated by the one-time
+     * setup cost.  So there is no point in trying to be excessively
+     * clever -- esr.
+     */
+
+    /* shift n lines downwards */
+    if (n < 0) {
+	limit = top - n;
+	for (line = bottom; line >= limit && line >= 0; line--) {
+	    TR(TRACE_MOVE, ("...copying %d to %d", line + n, line));
+	    memcpy(win->_line[line].text,
+		   win->_line[line + n].text,
+		   to_copy);
+	    if_USE_SCROLL_HINTS(win->_line[line].oldindex =
+				win->_line[line + n].oldindex);
+	}
+	for (line = top; line < limit && line <= win->_maxy; line++) {
+	    TR(TRACE_MOVE, ("...filling %d", line));
+	    for (j = 0; j <= win->_maxx; j++)
+		win->_line[line].text[j] = blank;
+	    if_USE_SCROLL_HINTS(win->_line[line].oldindex = _NEWINDEX);
+	}
+    }
+
+    /* shift n lines upwards */
+    if (n > 0) {
+	limit = bottom - n;
+	for (line = top; line <= limit && line <= win->_maxy; line++) {
+	    memcpy(win->_line[line].text,
+		   win->_line[line + n].text,
+		   to_copy);
+	    if_USE_SCROLL_HINTS(win->_line[line].oldindex =
+				win->_line[line + n].oldindex);
+	}
+	for (line = bottom; line > limit && line >= 0; line--) {
+	    for (j = 0; j <= win->_maxx; j++)
+		win->_line[line].text[j] = blank;
+	    if_USE_SCROLL_HINTS(win->_line[line].oldindex = _NEWINDEX);
+	}
+    }
+    touchline(win, top, bottom - top + 1);
+
+    if_WIDEC({
+	if (WINDOW_EXT(win, addch_used) != 0) {
+	    int next = WINDOW_EXT(win, addch_y) + n;
+	    if (next < 0 || next > win->_maxy) {
+		TR(TRACE_VIRTPUT,
+		   ("Alert discarded multibyte on scroll"));
+		WINDOW_EXT(win, addch_y) = 0;
+	    } else {
+		TR(TRACE_VIRTPUT, ("scrolled working position to %d,%d",
+				   WINDOW_EXT(win, addch_y),
+				   WINDOW_EXT(win, addch_x)));
+		WINDOW_EXT(win, addch_y) = next;
+	    }
+	}
+    })
+}
+
+NCURSES_EXPORT(int)
+wscrl(WINDOW *win, int n)
+{
+    T((T_CALLED("wscrl(%p,%d)"), win, n));
+
+    if (!win || !win->_scroll) {
+	TR(TRACE_MOVE, ("...scrollok is false"));
+	returnCode(ERR);
+    }
+
+    if (n != 0) {
+	_nc_scroll_window(win, n, win->_regtop, win->_regbottom, win->_nc_bkgd);
+	_nc_synchook(win);
+    }
+    returnCode(OK);
+}