diff --git a/input.cpp b/input.cpp
index 95c141c..917eafb 100644
--- a/input.cpp
+++ b/input.cpp
@@ -5864,6 +5864,7 @@ int input_test(int getchar)
 					cmd[len] = 0;
 					printf("MiSTer_cmd: %s\n", cmd);
 					if (!strncmp(cmd, "fb_cmd", 6)) video_cmd(cmd);
+					else if (!strncmp(cmd, "video_mode ", 11)) video_mode_cmd(cmd + 11);
 					else if (!strncmp(cmd, "load_core ", 10))
 					{
 						if(isXmlName(cmd)) xml_load(cmd + 10);
diff --git a/video.cpp b/video.cpp
index 777d14e..3e43d05 100644
--- a/video.cpp
+++ b/video.cpp
@@ -3900,6 +3900,23 @@ void video_cmd(char *cmd)
 	}
 }
 
+void video_mode_cmd(char *cmd)
+{
+	vmode_custom_t v = {};
+	int ret = parse_custom_video_mode(cmd, &v);
+	if (ret != -2)
+	{
+		printf("video_mode_cmd: only custom modelines are supported, got \"%s\"\n", cmd);
+		return;
+	}
+
+	v_def = v;
+	v_cur = v;
+	video_set_mode(&v, v.Fpix);
+	user_io_send_buttons(1);
+	printf("video_mode_cmd: applied mode \"%s\"\n", cmd);
+}
+
 static constexpr int CELL_GRAN_RND = 4;
 
 static int determine_vsync(int w, int h)
diff --git a/video.h b/video.h
index 6225a80..8cd39bc 100644
--- a/video.h
+++ b/video.h
@@ -67,6 +67,7 @@ void video_menu_bg(int n, int idle = 0);
 int video_bg_has_picture();
 int video_chvt(int num);
 void video_cmd(char *cmd);
+void video_mode_cmd(char *cmd);
 
 void video_core_description(char *str, size_t len);
 void video_scaler_description(char *str, size_t len);