diff -r 33da84af4bba -r 33bac54867bf sources/interface.cpp
--- a/sources/interface.cpp	Sun Dec 14 17:53:24 2014 +0200
+++ b/sources/interface.cpp	Sun Dec 14 18:15:28 2014 +0200
@@ -31,6 +31,8 @@
 #include <string.h>
 #include "interface.h"
 
+enum { PAGE_SIZE = 10 };
+
 static String g_input;
 static int g_cursor = 0;
 static int g_pan = 0;
@@ -68,7 +70,14 @@
 interface_render_log_area() -> void
 {
 	int height = LINES - 3;
-	int start = max (0, g_output.size() - height - 1);
+
+	// ensure we're within bounds
+	if (g_outputScroll + height >= g_output.size())
+		g_outputScroll = g_output.size() - height - 1;
+	else if (g_outputScroll < 0)
+		g_outputScroll = 0;
+
+	int start = max (0, g_output.size() - height - 1 - g_outputScroll);
 	int end = min (g_output.size(), start + height);
 	int y = 1;
 	assert (end - start <= height);
@@ -183,6 +192,7 @@
 	interface_render_full();
 	refresh();
 	g_needRefresh = false;
+	print ("Interface initialized.\n");
 }
 
 // -------------------------------------------------------------------------------------------------
@@ -252,6 +262,18 @@
 			g_needInputRender = true;
 		}
 		break;
+
+	case KEY_PPAGE:
+		g_outputScroll += PAGE_SIZE;
+		interface_render_log_area();
+		g_needRefresh = true;
+		break;
+
+	case KEY_NPAGE:
+		g_outputScroll -= PAGE_SIZE;
+		interface_render_log_area();
+		g_needRefresh = true;
+		break;
 	}
 
 	if (g_needStatusBarRender) interface_render_statusbar();