     XSIR,
     XSDR,
     XRUNTEST,
-    XREPEAT = 7,
+    XRESERVED_5,
+    XRESERVED_6,
+    XREPEAT,
     XSDRSIZE,
     XSDRTDO,
     XSETSDRMASKS,

  bool handle_XSDR() {
    get_next_bytes(tdi_, sdrsize_bytes_);
    DEBUG_BYTES("... sending ", tdi_, sdrsize_bytes_);
    return sdr(true, false);
  }

  bool handle_XRUNTEST() {

    get_next_bytes(tdo_expected_, sdrsize_bytes_);
    DEBUG_BYTES("... sending   ", tdi_, sdrsize_bytes_);
    DEBUG_BYTES("... expecting ", tdo_expected_, sdrsize_bytes_);
    return sdr(true, true, true);
  }

  bool is_tdo_as_expected() {
