diff --git a/HP2100/hp2100_mpx.c b/HP2100/hp2100_mpx.c
index c9d8ec7d..f780ebac 100644
--- a/HP2100/hp2100_mpx.c
+++ b/HP2100/hp2100_mpx.c
@@ -1032,12 +1032,12 @@ static REG mpx_reg [] = {
     { BRDATA (ACKWAIT,  mpx_ack_wait,         10,    10,                    MPX_PORTS)                                },
     { BRDATA (PFLAGS,   mpx_flags,             2,    12,                    MPX_PORTS)                                },
 
-    { BRDATA (RBUF,     mpx_rbuf,             8,     8,                    MPX_PORTS * RD_BUF_SIZE), REG_A           },
-    { BRDATA (WBUF,     mpx_wbuf,             8,     8,                    MPX_PORTS * WR_BUF_SIZE), REG_A           },
+    { CRDATA (RBUF,     mpx_rbuf,             8,     8,                    MPX_PORTS * RD_BUF_SIZE), REG_A           },
+    { CRDATA (WBUF,     mpx_wbuf,             8,     8,                    MPX_PORTS * WR_BUF_SIZE), REG_A           },
 
-    { BRDATA (GET,      mpx_get,              10,    10,                    MPX_PORTS * 2)                            },
-    { BRDATA (SEP,      mpx_sep,              10,    10,                    MPX_PORTS * 2)                            },
-    { BRDATA (PUT,      mpx_put,              10,    10,                    MPX_PORTS * 2)                            },
+    { CRDATA (GET,      mpx_get,              10,    10,                    MPX_PORTS * 2)                            },
+    { CRDATA (SEP,      mpx_sep,              10,    10,                    MPX_PORTS * 2)                            },
+    { CRDATA (PUT,      mpx_put,              10,    10,                    MPX_PORTS * 2)                            },
 
     { FLDATA (CTL,      mpx.control,                              0)                                                  },
     { FLDATA (FLG,      mpx.flag,                                 0)                                                  },