diff --git a/display/type340.c b/display/type340.c
index 2e65617..32fc8cf 100644
--- a/display/type340.c
+++ b/display/type340.c
@@ -115,9 +115,7 @@ enum jump_type { DJP=2, DJS=3, DDS=1 }; /* type 347 */
 
 /* put all the state in a struct "just in case" */
 static struct type340 {
-#ifdef NOTYET
     ty340word DAC;              /* Display Address Counter */
-#endif
     ty340word status;           /* see ST340_XXX in type340.h */
     signed short xpos, ypos;    /* 10 bits, signed (for OOB checks) */
     char initialized;           /* 0 before display_init */
@@ -143,7 +141,6 @@ static struct type340 {
 #define UNIT(N) (u340+(N))
 #endif
 
-#if 0
 /* NOT USED WITH PDP-6 Type 344 Interface!! */
 void
 ty340_set_dac(ty340word addr)
@@ -157,7 +154,50 @@ ty340_set_dac(ty340word addr)
     u->status = 0;               /* XXX just clear stopped? */
     ty340_rfd();                 /* ready for data */
 }
+
+void
+ty340_cycle(void)
+{
+    struct type340 *u = UNIT(0);
+
+    if (u->status == 0) {
+        ty340word insn = ty340_fetch(u->DAC);
+        u->status = ty340_instruction (insn);
+        u->DAC = (u->DAC + 1) & 07777;
+    }
+}
+
+ty340word
+ty340_get_dac(void)
+{
+    struct type340 *u = UNIT(0);
+    return u->DAC;
+}
+
+ty340word
+ty340_get_asr(void)
+{
+#if TYPE347
+    struct type340 *u = UNIT(0);
+    return u->ASR;
+#else
+    return 0;
 #endif
+}
+
+ty340word
+ty340_sense(ty340word flags)
+{
+    struct type340 *u = UNIT(0);
+    return u->status & flags;
+}
+
+void
+ty340_clear(ty340word flags)
+{
+    struct type340 *u = UNIT(0);
+    u->status &= ~flags;
+}
 
 ty340word
 ty340_reset(void *dptr)
diff --git a/display/type340.h b/display/type340.h
index 1c39dc1..5caf06d 100644
--- a/display/type340.h
+++ b/display/type340.h
@@ -49,7 +49,13 @@ typedef unsigned int ty340word;
 ty340word ty340_reset(void *);
 ty340word ty340_status(void);
 ty340word ty340_instruction(ty340word inst);
+ty340word ty340_get_dac(void);
+ty340word ty340_get_asr(void);
+ty340word ty340_sense(ty340word);
 void ty340_set_dac(ty340word addr);
+void ty340_clear(ty340word addr);
+void ty340_cycle(void);
+void ty340_set_status(ty340word);
 void ty342_set_grid(int, int);
 
 /*
diff --git a/sim_fio.c b/sim_fio.c
index 9bfecde..6fef8ea 100644
--- a/sim_fio.c
+++ b/sim_fio.c
@@ -782,7 +782,9 @@ else {
         return NULL;
         }
     strlcpy (fullpath, dir, tot_len);
-    strlcat (fullpath, "/", tot_len);
+    if ((dir[strlen (dir) - 1] != '/') &&       /* if missing a trailing directory separator? */
+        (dir[strlen (dir) - 1] != '\\'))
+        strlcat (fullpath, "/", tot_len);       /*  then add one */
     strlcat (fullpath, filepath, tot_len);
     }
 while ((c = strchr (fullpath, '\\')))           /* standardize on / directory separator */
diff --git a/sim_tape.c b/sim_tape.c
index 89cd09e..4a24d1b 100644
--- a/sim_tape.c
+++ b/sim_tape.c
@@ -816,7 +816,16 @@ switch (MT_GET_FMT (uptr)) {
         break;
     }
 if (r != SCPE_OK) {                                     /* error? */
-    r = sim_messagef (r, "Can't open %s format tape image: %s\n", _sim_tape_format_name (uptr), cptr);
+    switch (MT_GET_FMT (uptr)) {
+        case MTUF_F_ANSI:
+        case MTUF_F_TAR:
+        case MTUF_F_FIXED:
+            r = sim_messagef (r, "Error opening %s format internal tape image generated from: %s\n", _sim_tape_format_name (uptr), cptr);
+            break;
+        default:
+            r = sim_messagef (r, "Error opening %s format tape image: %s - %s\n", _sim_tape_format_name (uptr), cptr, strerror(errno));
+            break;
+        }
     if (auto_format)    /* format was specified at attach time? */
         sim_tape_set_fmt (uptr, 0, "SIMH", NULL);   /* restore default format */
     uptr->recsize = 0;
@@ -4416,24 +4425,27 @@ HDR2 hdr2;
 HDR3 hdr3;
 HDR4 hdr4;
 
-memset (&statb, 0, sizeof (statb));
-if (stat (filename, &statb)) {
-    sim_printf ("Can't stat: %s\n", filename);
-    return -1;
-    }
-if (S_IFDIR & statb.st_mode) {
-    sim_printf ("Can't put a directory on tape: %s\n", filename);
-    return -1;
-    }
-if (!(S_IFREG & statb.st_mode)) {
-    sim_printf ("Can't put a non regular file on tape: %s\n", filename);
-    return -1;
-    }
 f = fopen (filename, "rb");
 if (f == NULL) {
     sim_printf ("Can't open: %s - %s\n", filename, strerror(errno));
     return errno;
     }
+memset (&statb, 0, sizeof (statb));
+if (fstat (fileno (f), &statb)) {
+    sim_printf ("Can't stat: %s\n", filename);
+    fclose (f);
+    return -1;
+    }
+if (S_IFDIR & statb.st_mode) {
+    sim_printf ("Can't put a directory on tape: %s\n", filename);
+    fclose (f);
+    return -1;
+    }
+if (!(S_IFREG & statb.st_mode)) {
+    sim_printf ("Can't put a non regular file on tape: %s\n", filename);
+    fclose (f);
+    return -1;
+    }
 tape_classify_file_contents (f, &max_record_size, &lf_line_endings, &crlf_line_endings);
 ansi_make_HDR1 (&hdr1, &tape->vol1, &hdr4, filename, tape->ansi_type);
 sprintf (file_sequence, "%04d", 1 + tape->file_count);