diff --git a/twsmouse.c b/twsmouse.c
index 2d9267a..581df65 100644
--- a/twsmouse.c
+++ b/twsmouse.c
@@ -1,71 +1,120 @@
 /* wsmouse events dump */
+#include <sys/ioctl.h>
 #include <sys/time.h>
 #include <dev/wscons/wsconsio.h>
+#include <err.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 
+void
+usage(void)
+{
+	errx(2, "usage: twsmouse [-v version]");
+}
+
 int
 main(int argc, char *argv[])
 {
-	int fd, n;
+	int ch, fd, n, version = 0;
+	int type, value;
 	char	 *dev;
 	struct wscons_event event;
-	
-	if (argc == 2) {
-		dev = argv[1];	
+	struct wscons_event_ex eventx;
+
+	while ((ch = getopt(argc, argv, "v:")) != -1) {
+		switch (ch) {
+		case 'v':
+			version = atoi(optarg);
+			break;
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc == 1) {
+		dev = argv[0];
 	} else {
 		dev = "/dev/wsmouse";
 	}
-	
+
 	fd = open(dev, O_RDONLY);
 	if (fd < 0) {
 		perror("open");
 		exit(1);
-	} 
-	
+	}
+	if (version > 0)
+		if (ioctl(fd, WSKBDIO_SETVERSION, &version) == -1)
+			err(1, "SETVERSION %d", version);
+
 	while (1) {
-		n = read(fd, &event, sizeof(struct wscons_event));
+		if (version == 0)
+			n = read(fd, &event, sizeof(struct wscons_event));
+		else
+			n = read(fd, &eventx, sizeof(struct wscons_event_ex));
+
 		if (n <= 0) {
 			perror("read");
 		}
-		// printf("device: %#x: ", event.device);
-		switch (event.type) {
+		if (version == 0) {
+			type = event.type;
+			value = event.value;
+		} else {
+			type = eventx.type;
+			value = eventx.value;
+			printf("device: %#x: ", eventx.device);
+		}
+
+		switch (type) {
 		case WSCONS_EVENT_MOUSE_UP:
-			printf("MOUSE_UP: 0x%x\n", event.value);
+			printf("MOUSE_UP: 0x%x\n", value);
 			break;
 		case WSCONS_EVENT_MOUSE_DOWN:
-			printf("MOUSE_DOWN: 0x%x\n", event.value);
+			printf("MOUSE_DOWN: 0x%x\n", value);
 			break;
 		case WSCONS_EVENT_MOUSE_DELTA_X:
-			printf("MOUSE_DELTA_X: %d\n", event.value);
+			printf("MOUSE_DELTA_X: %d\n", value);
 			break;
 		case WSCONS_EVENT_MOUSE_DELTA_Y:
-			printf("MOUSE_DELTA_Y: %d\n", event.value);
+			printf("MOUSE_DELTA_Y: %d\n", value);
 			break;
 #ifdef WSCONS_EVENT_MOUSE_DELTA_Z
 		case WSCONS_EVENT_MOUSE_DELTA_Z:
-			printf("MOUSE_DELTA_Z: %d\n", event.value);
+			printf("MOUSE_DELTA_Z: %d\n", value);
 			break;
 #endif
 #ifdef WSCONS_EVENT_MOUSE_ABSOLUTE_Z
 		case WSCONS_EVENT_MOUSE_ABSOLUTE_Z:
-			printf("MOUSE_ABSOLUTE_Z: %d\n", event.value);
+			printf("MOUSE_ABSOLUTE_Z: %d\n", value);
 			break;
 #endif
 		case WSCONS_EVENT_MOUSE_ABSOLUTE_X:
-			printf("MOUSE_ABSOLUTE_X: %d\n", event.value);
+			printf("MOUSE_ABSOLUTE_X: %d\n", value);
 			break;
 		case WSCONS_EVENT_MOUSE_ABSOLUTE_Y:
-			printf("MOUSE_ABSOLUTE_Y: %d\n", event.value);
+			printf("MOUSE_ABSOLUTE_Y: %d\n", value);
+			break;
+		case WSCONS_EVENT_MOUSE_DELTA_W:
+			printf("MOUSE_DELTA_W: %d\n", value);
+			break;
+		case WSCONS_EVENT_MOUSE_ABSOLUTE_W:
+			printf("MOUSE_ABSOLUTE_W: %d\n", value);
 			break;
 		case WSCONS_EVENT_SYNC:
 			printf("SYNC\n");
 			break;
+		case WSCONS_EVENT_HSCROLL:
+			printf("HSCROLL: %d\n", value);
+			break;
+		case WSCONS_EVENT_VSCROLL:
+			printf("VSCROLL: %d\n", value);
+			break;
 		default:
 			printf("unknown event type 0x%x, value 0x%x\n",
-			    event.type, event.value);
+			    type, value);
 		}
 	}
 }