diff -rup hp/hptalx-1.3.0/src/hpcomm.c hp_patch/hptalx-1.3.0/src/hpcomm.c
--- hp/hptalx-1.3.0/src/hpcomm.c	2005-07-19 07:35:07.000000000 -0400
+++ hp_patch/hptalx-1.3.0/src/hpcomm.c	2007-08-06 21:53:14.000000000 -0400
@@ -331,6 +331,8 @@ hp_version (hp_calc * v)
 	*v = HP49G;
     if (strstr (bulk_data, HP_CALC_MODEL_49GPLUS))
 	*v = HP49G_PLUS;
+    if (strstr (bulk_data, HP_CALC_MODEL_50G)) 
+        *v = HP50G ;
 
     k_free_bulk_output (&bulk_data);
 
diff -rup hp/hptalx-1.3.0/src/hpcomm.h hp_patch/hptalx-1.3.0/src/hpcomm.h
--- hp/hptalx-1.3.0/src/hpcomm.h	2005-07-19 07:35:08.000000000 -0400
+++ hp_patch/hptalx-1.3.0/src/hpcomm.h	2007-08-06 21:27:54.000000000 -0400
@@ -187,6 +187,7 @@
 #define HP_CALC_MODEL_48 "HP48"
 #define HP_CALC_MODEL_49 "HP49"
 #define HP_CALC_MODEL_49GPLUS "HP49-C"
+#define HP_CALC_MODEL_50G "HP50-C"
 
 /*
  * HP File Type strings 
@@ -270,6 +271,8 @@ enum _hp_calc
 
     HP49G_PLUS,			/* HP49g+ Calculator */
 
+    HP50G,                      /* HP50g Calculator */
+
     HP_UNKNOWN			/* Unknown calculator */
 };
 typedef enum _hp_calc hp_calc;
diff -rup hp/hptalx-1.3.0/src/io.c hp_patch/hptalx-1.3.0/src/io.c
--- hp/hptalx-1.3.0/src/io.c	2005-07-19 07:35:08.000000000 -0400
+++ hp_patch/hptalx-1.3.0/src/io.c	2007-08-06 21:57:34.000000000 -0400
@@ -125,6 +125,7 @@ _io_check_file_type (const char *f)
 	    }
 	    return OK;
 	    break;
+	case HP50G:
 	case HP49G_PLUS:
 	case HP49G:
 	    if (ft != HP_FT_HP49) {
@@ -2073,6 +2074,9 @@ io_connect (GtkWidget * w, gpointer wdc 
     case HP49G:
 	status_push ("HP 49 found");
 	break;
+    case HP50G:
+        status_push ("HP 50 found") ;
+        break ;
     case HP_UNKNOWN:
 	message_box (MSG_ERR, MSG_ERR_UNKOWN_CALC);
 	status_push (MSG_INF_UNKNOWN_CALC);