Index: uspace/app/msim/helenos.c
===================================================================
--- uspace/app/msim/helenos.c	(revision 341b5155553dd6d613629bd6d5bc76474f5692e8)
+++ uspace/app/msim/helenos.c	(revision 7360332f26ff1db94b63b154f3f1c37492dc8dd1)
@@ -48,4 +48,8 @@
  */
 #define IGNORE_ANSI_ESCAPE_SEQUENCES
+/* Define when you want the ANSI escape sequences to be dumped as
+ * hex numbers.
+ */
+// #define DUMP_ANSI_ESCAPE_SEQUENCES
 
 extern char *input_helenos_get_next_command(void);
@@ -105,9 +109,13 @@
 
 	if (inside_ansi_escape) {
+#ifdef DUMP_ANSI_ESCAPE_SEQUENCES
 		fprintf(stderr, "%02" PRIx32 "'%c' ", val, val >= 32 ? val : '?');
+#endif
 		if (isalpha((int) val)) {
 			just_ended_ansi_escape = true;
 			inside_ansi_escape = false;
+#ifdef DUMP_ANSI_ESCAPE_SEQUENCES
 			fprintf(stderr, " [END]\n");
+#endif
 		}
 
@@ -119,7 +127,11 @@
 
 		if (!just_ended_ansi_escape) {
+#ifdef DUMP_ANSI_ESCAPE_SEQUENCES
 			fprintf(stderr, "\n");
+#endif
 		}
+#ifdef DUMP_ANSI_ESCAPE_SEQUENCES
 		fprintf(stderr, "ESC sequence: ");
+#endif
 
 		return;