[answer protocol ping
timo.lindfors@iki.fi**20090129163227] hunk ./stv680/usb.c 1468
+        case 0x88:
+            fprintf(stderr, "ping\n");
+            buf[0] = 0x56;
+            buf[1] = 0x78;
+            status = write (fd, buf, 2);
+            if (status != 0x2)
+                perror ("ack ping");
+            return;
