diff -Naur '--exclude=CVS' '--exclude=autom4te.cache' '--exclude=config.*' '--exclude=configure' '--exclude=Makefile' atari800-trunk/src/atari.c atari800/src/atari.c
--- atari800-trunk/src/atari.c	2013-05-21 15:13:24.000000000 +0200
+++ atari800/src/atari.c	2013-12-11 11:44:01.000000000 +0100
@@ -586,6 +589,9 @@
 		else if (strcmp(argv[i], "-turbo") == 0) {
 			Atari800_turbo = TRUE;
 		}
+		else if (strcmp(argv[i], "-monitor") == 0) {
+			MONITOR_break_step = TRUE;
+		}
 		else {
 			/* parameters that take additional argument follow here */
 			int i_a = (i + 1 < *argc);		/* is argument available? */
@@ -701,6 +707,7 @@
 					Log_print("\t-rdevice [<dev>] Enable R: emulation (using serial device <dev>)");
 #endif
 					Log_print("\t-turbo           Run emulated Atari as fast as possible");
+					Log_print("\t-monitor         Enter monitor");
 					Log_print("\t-v               Show version/release number");
 				}