diff --git a/scp.c b/scp.c
index 48b81f87..edc96ba0 100644
--- a/scp.c
+++ b/scp.c
@@ -2247,7 +2247,7 @@ DEVICE *dptr;
 UNIT *uptr;
 MTAB *mptr;
 CTAB *gcmdp;
-C1TAB *ctbr, *glbr;
+C1TAB *ctbr = NULL, *glbr;
 
 static CTAB set_glob_tab[] = {
     { "CONSOLE", &sim_set_console, 0 },
@@ -3731,16 +3731,22 @@ if (sim_switches & SWMASK ('R')) {                      /* read only? */
     if (uptr->fileref == NULL)                          /* open fail? */
         return attach_err (uptr, SCPE_OPENERR);         /* yes, error */
     uptr->flags = uptr->flags | UNIT_RO;                /* set rd only */
-    if (!sim_quiet)
+    if (!sim_quiet) {
         printf ("%s: unit is read only\n", sim_dname (dptr));
+        if (sim_log)
+            fprintf (sim_log, "%s: unit is read only\n", sim_dname (dptr));
+        }
     }
 else {
     if (sim_switches & SWMASK ('N')) {                  /* new file only? */
         uptr->fileref = sim_fopen (cptr, "wb+");        /* open new file */
         if (uptr->fileref == NULL)                      /* open fail? */
             return attach_err (uptr, SCPE_OPENERR);     /* yes, error */
-        if (!sim_quiet)
+        if (!sim_quiet) {
             printf ("%s: creating new file\n", sim_dname (dptr));
+            if (sim_log)
+                fprintf (sim_log, "%s: creating new file\n", sim_dname (dptr));
+            }
         }
     else {                                              /* normal */
         uptr->fileref = sim_fopen (cptr, "rb+");        /* open r/w */
@@ -3756,8 +3762,11 @@ else {
                 if (uptr->fileref == NULL)              /* open fail? */
                     return attach_err (uptr, SCPE_OPENERR); /* yes, error */
                 uptr->flags = uptr->flags | UNIT_RO;    /* set rd only */
-                if (!sim_quiet)
+                if (!sim_quiet) {
                     printf ("%s: unit is read only\n", sim_dname (dptr));
+                    if (sim_log)
+                        fprintf (sim_log, "%s: unit is read only\n", sim_dname (dptr));
+                    }
                 }
             else {                                      /* doesn't exist */
                 if (sim_switches & SWMASK ('E'))        /* must exist? */
@@ -3765,8 +3774,11 @@ else {
                 uptr->fileref = sim_fopen (cptr, "wb+");/* open new file */
                 if (uptr->fileref == NULL)              /* open fail? */
                     return attach_err (uptr, SCPE_OPENERR); /* yes, error */
-                if (!sim_quiet)
+                if (!sim_quiet) {
                     printf ("%s: creating new file\n", sim_dname (dptr));
+                    if (sim_log)
+                        fprintf (sim_log, "%s: creating new file\n", sim_dname (dptr));
+                    }
                 }
             }                                           /* end if null */
         }                                               /* end else */
@@ -3777,7 +3789,11 @@ if (uptr->flags & UNIT_BUFABLE) {                       /* buffer? */
         uptr->filebuf = calloc (cap, SZ_D (dptr));      /* allocate */
     if (uptr->filebuf == NULL)                          /* no buffer? */
         return attach_err (uptr, SCPE_MEM);             /* error */
-    if (!sim_quiet) printf ("%s: buffering file in memory\n", sim_dname (dptr));
+    if (!sim_quiet) {
+        printf ("%s: buffering file in memory\n", sim_dname (dptr));
+        if (sim_log)
+            fprintf (sim_log, "%s: buffering file in memory\n", sim_dname (dptr));
+        }
     uptr->hwmark = (uint32)sim_fread (uptr->filebuf,    /* read file */
         SZ_D (dptr), cap, uptr->fileref);
     uptr->flags = uptr->flags | UNIT_BUF;               /* set buffered */
@@ -3891,8 +3907,11 @@ if ((dptr = find_dev_from_unit (uptr)) == NULL)
 if (uptr->flags & UNIT_BUF) {
     uint32 cap = (uptr->hwmark + dptr->aincr - 1) / dptr->aincr;
     if (uptr->hwmark && ((uptr->flags & UNIT_RO) == 0)) {
-        if (!sim_quiet)
+        if (!sim_quiet) {
             printf ("%s: writing buffer to file\n", sim_dname (dptr));
+            if (sim_log)
+                fprintf (sim_log, "%s: writing buffer to file\n", sim_dname (dptr));
+            }
         rewind (uptr->fileref);
         sim_fwrite (uptr->filebuf, SZ_D (dptr), cap, uptr->fileref);
         if (ferror (uptr->fileref))
@@ -4713,7 +4732,7 @@ return;
 
 t_stat exdep_cmd (int32 flag, char *cptr)
 {
-char gbuf[CBUFSIZE], *gptr, *tptr;
+char gbuf[CBUFSIZE], *gptr, *tptr = NULL;
 int32 opt;
 t_addr low, high;
 t_stat reason;
@@ -5663,6 +5682,7 @@ DEVICE *dptr;
 
 if (uptr == NULL)                                       /* arg error? */
     return NULL;
+*uptr = NULL;
 if ((dptr = find_dev (cptr))) {                         /* exact match? */
     if (qdisable (dptr))                                /* disabled? */
         return NULL;
@@ -5770,6 +5790,7 @@ int32 i;
 DEVICE *dptr;
 REG *rptr, *srptr = NULL;
 
+*gdptr = NULL;
 for (i = 0; (dptr = sim_devices[i]) != 0; i++) {        /* all dev */
     if (dptr->flags & DEV_DIS)                          /* skip disabled */
         continue;
@@ -5985,13 +6006,14 @@ SCHTAB *get_search (char *cptr, int32 radix, SCHTAB *schptr)
 {
 int32 c, logop, cmpop;
 t_value logval, cmpval;
-char *sptr, *tptr;
+const char *sptr;
+char *tptr;
 const char logstr[] = "|&^", cmpstr[] = "=!><";
 
 logval = cmpval = 0;
 if (*cptr == 0)                                         /* check for clause */
     return NULL;
-for (logop = cmpop = -1; (c = *cptr++); ) {               /* loop thru clauses */
+for (logop = cmpop = -1; (c = *cptr++); ) {             /* loop thru clauses */
     if ((sptr = strchr (logstr, c))) {                  /* check for mask */
         logop = (int32)(sptr - logstr);
         logval = strtotv (cptr, &tptr, radix);
@@ -6203,13 +6225,12 @@ t_stat fprint_val (FILE *stream, t_value val, uint32 radix,
     uint32 width, uint32 format)
 {
 char dbuf[MAX_WIDTH + 1];
-t_stat r;
 
 if (!stream)
     return sprint_val (NULL, val, radix, width, format);
 if (width > MAX_WIDTH)
     width = MAX_WIDTH;
-r = sprint_val (dbuf, val, radix, width, format);
+sprint_val (dbuf, val, radix, width, format);
 if (fputs (dbuf, stream) == EOF)
     return SCPE_IOERR;
 return SCPE_OK;
@@ -6922,7 +6943,6 @@ return debtab_nomatch;
 static const char *sim_debug_prefix (uint32 dbits, DEVICE* dptr)
 {
 char* debug_type = get_dbg_verb (dbits, dptr);
-static const char* debug_fmt     = "DBG(%.0f)%s> %s %s: ";
 char tim_t[32] = "";
 char tim_a[32] = "";
 char pc_s[64] = "";
@@ -6940,7 +6960,7 @@ if (sim_deb_switches & SWMASK ('T')) {
     sprintf(tim_t, "%02d:%02d:%02d.%03d ", now->tm_hour, now->tm_min, now->tm_sec, (int)(time_now.tv_nsec/1000000));
     }
 if (sim_deb_switches & SWMASK ('A')) {
-    sprintf(tim_t, "%lld.%03d ", (long long)(time_now.tv_sec), (int)(time_now.tv_nsec/1000000));
+    sprintf(tim_t, "%" LL_FMT "d.%03d ", (long long)(time_now.tv_sec), (int)(time_now.tv_nsec/1000000));
     }
 if (sim_deb_switches & SWMASK ('P')) {
     t_value val;
@@ -7032,7 +7052,6 @@ if (sim_deb && (dptr->dctrl & dbits)) {
     char *buf = stackbuf;
     va_list arglist;
     int32 i, j, len;
-    char* debug_type = get_dbg_verb (dbits, dptr);
     const char* debug_prefix = sim_debug_prefix(dbits, dptr);   /* prefix to print if required */
 
     buf[bufsize-1] = '\0';
diff --git a/sim_console.c b/sim_console.c
index 8f7c9caa..f861ffdc 100644
--- a/sim_console.c
+++ b/sim_console.c
@@ -515,7 +515,7 @@ return SCPE_OK;
 
 t_stat sim_rem_con_data_svc (UNIT *uptr)
 {
-int32 i, j, c;
+int32 i, j, c = 0;
 t_stat stat, stat_nomessage;
 t_bool stepping = FALSE;
 int32 steps = 1;
@@ -525,7 +525,7 @@ t_bool close_session = FALSE;
 TMLN *lp;
 char cbuf[4*CBUFSIZE], gbuf[CBUFSIZE], *cptr, *argv[1] = {NULL};
 CTAB *cmdp = NULL;
-uint32 read_start_time;
+uint32 read_start_time = 0;
 t_offset cmd_log_start;
 
 tmxr_poll_rx (&sim_rem_con_tmxr);                      /* poll input */
@@ -686,7 +686,7 @@ for (i=(was_stepping ? sim_rem_step_line : 0);
                         }
                     sim_rem_buf[i][sim_rem_buf_ptr[i]++] = c;
                     sim_rem_buf[i][sim_rem_buf_ptr[i]] = '\0';
-                    if (sim_rem_buf_ptr[i] >= sizeof(cbuf))
+                    if (((size_t)sim_rem_buf_ptr[i]) >= sizeof(cbuf))
                         got_command = TRUE;                 /* command too long */
                     break;
                 }
@@ -1073,16 +1073,16 @@ if (!sim_quiet) {
         printf ("   Debug messages display time of day as hh:mm:ss.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
     if (sim_deb_switches & SWMASK ('A'))
         printf ("   Debug messages display time of day as seconds.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
-    }
-if (sim_log) {
-    fprintf (sim_log, "Debug output to \"%s\"\n", 
-                      sim_logfile_name (sim_deb, sim_deb_ref));
-    if (sim_deb_switches & SWMASK ('P'))
-        fprintf (sim_log, "   Debug messages contain current PC value\n");
-    if (sim_deb_switches & SWMASK ('T'))
-        fprintf (sim_log, "   Debug messages display time of day as hh:mm:ss.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
-    if (sim_deb_switches & SWMASK ('A'))
-        fprintf (sim_log, "   Debug messages display time of day as seconds.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
+    if (sim_log) {
+        fprintf (sim_log, "Debug output to \"%s\"\n", 
+                          sim_logfile_name (sim_deb, sim_deb_ref));
+        if (sim_deb_switches & SWMASK ('P'))
+            fprintf (sim_log, "   Debug messages contain current PC value\n");
+        if (sim_deb_switches & SWMASK ('T'))
+            fprintf (sim_log, "   Debug messages display time of day as hh:mm:ss.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
+        if (sim_deb_switches & SWMASK ('A'))
+            fprintf (sim_log, "   Debug messages display time of day as seconds.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
+        }
     }
 time(&now);
 fprintf (sim_deb, "Debug output to \"%s\" at %s", sim_logfile_name (sim_deb, sim_deb_ref), ctime(&now));
diff --git a/sim_defs.h b/sim_defs.h
index 5d5dd926..13c67b88 100644
--- a/sim_defs.h
+++ b/sim_defs.h
@@ -209,6 +209,12 @@ typedef uint32          t_addr;
 #define STACKBUFSIZE 2048
 #endif
 
+#if defined (_WIN32) /* Actually, a GCC issue */
+#define LL_FMT "I64"
+#else
+#define LL_FMT "ll"
+#endif
+
 #if defined (VMS) && (defined (__ia64) || defined (__ALPHA))
 #define HAVE_GLOB
 #endif