anchor.diff:  // prefix of the signals "tx"
   // Hopefully this is what importbvi.py would do
   (* always_ready, always_enabled *)
  -interface Par_tx;
  +interface Par_txo;
      method Action data_p(Bit#(8) v);
      method Action data_n(Bit#(8) v);
      method Action frame_p(Bit#(1) v);
      method Action frame_n(Bit#(1) v);
      method Action lclk_p(Bit#(1) v);
      method Action lclk_n(Bit#(1) v);
  +endinterface
  +
  +interface Par_txi;
      method Bit#(1) wr_wait_p();
      method Bit#(1) wr_wait_n();
      method Bit#(1) rd_wait_p();
  
positive.code:       method cclk_n(cclk_n) enable((*inhigh*) EN_cclk_n);
     endinterface
     
     interface Par_tx tx;
        method data_p(tx_data_p) enable((*inhigh*) EN_tx_data_p);
        method data_n(tx_data_n) enable((*inhigh*) EN_tx_data_n);
        method frame_p(tx_frame_p) enable((*inhigh*) EN_tx_frame_p);
        method frame_n(tx_frame_n) enable((*inhigh*) EN_tx_frame_n);
        method lclk_p(tx_lclk_p) enable((*inhigh*) EN_tx_lclk_p);
        method lclk_n(tx_lclk_n) enable((*inhigh*) EN_tx_lclk_n);
        method tx_wr_wait_p wr_wait_p();
        method tx_wr_wait_n wr_wait_n();
        method tx_rd_wait_p rd_wait_p();
        method tx_rd_wait_n rd_wait_n();
     endinterface
  
     interface Par_rx rx;
        method rx_data_p data_p();
        method rx_data_n data_n();
        method rx_frame_p frame_p();
        method rx_frame_n frame_n();
        method rx_lclk_p lclk_p();
        method rx_lclk_n lclk_n();
        method wr_wait_p(rx_wr_wait_p) enable((*inhigh*) EN_rx_wr_wait_p);
        method wr_wait_n(rx_wr_wait_n) enable((*inhigh*) EN_rx_wr_wait_n);
        method rd_wait_p(rx_rd_wait_p) enable((*inhigh*) EN_rx_rd_wait_p);
        method rd_wait_n(rx_rd_wait_n) enable((*inhigh*) EN_rx_rd_wait_n);
     endinterface
     
     interface ParSaxiHp saxi;
  
negative.code: 
  (* always_ready, always_enabled *)
  interface ELink;
     interface Par_txi txi;
     interface Par_txo txo;
     interface Par_rxi rxi;
     interface Par_rxo rxo;
     interface ParMaxiGp maxi;   // this will connect to a master
     interface ParSaxiHp saxi;  // this will connect to a slave
     interface Par_misc misc;
  