diff --git a/src/board_gruvin9x.cpp b/src/board_gruvin9x.cpp
index 4bcf3da17..0628eac27 100644
--- a/src/board_gruvin9x.cpp
+++ b/src/board_gruvin9x.cpp
@@ -83,7 +83,7 @@ inline void board_init()
   utm.tm_min =  rtc.min;
   utm.tm_sec =  rtc.sec;
   utm.tm_wday = rtc.wday - 1;
-  g_unixTime = mktime(&utm);
+  g_unixTime = gmktime(&utm);
 #endif
 
   /***************************************************/
diff --git a/src/eeprom_arm.cpp b/src/eeprom_arm.cpp
index c54ff81b3..556e2537a 100644
--- a/src/eeprom_arm.cpp
+++ b/src/eeprom_arm.cpp
@@ -906,6 +906,7 @@ uint32_t unprotect_eeprom()
 
 #if defined(SDCARD)
 FATFS g_FATFS_Obj; // TODO not here
+#define FILENAME_MAXLEN 8
 const pm_char * eeBackupModel(uint8_t i_fileSrc)
 {
   char *buf = reusableBuffer.models.mainname;
@@ -929,9 +930,9 @@ const pm_char * eeBackupModel(uint8_t i_fileSrc)
 
   buf[sizeof(MODELS_PATH)-1] = '/';
   memcpy(&buf[sizeof(MODELS_PATH)], ModelNames[i_fileSrc], sizeof(g_model.name));
-  buf[sizeof(MODELS_PATH)+sizeof(g_model.name)] = '\0';
+  buf[sizeof(MODELS_PATH)+FILENAME_MAXLEN] = '\0';
 
-  uint8_t i = sizeof(MODELS_PATH)+sizeof(g_model.name)-1;
+  uint8_t i = sizeof(MODELS_PATH)+FILENAME_MAXLEN-1;
   uint8_t len = 0;
   while (i>sizeof(MODELS_PATH)-1) {
     if (!len && buf[i])
diff --git a/src/eeprom_avr.cpp b/src/eeprom_avr.cpp
index 4660d4bad..34940d3ba 100644
--- a/src/eeprom_avr.cpp
+++ b/src/eeprom_avr.cpp
@@ -531,6 +531,7 @@ bool RlcFile::copy(uint8_t i_fileDst, uint8_t i_fileSrc)
 }
 
 #if defined(SDCARD)
+#define FILENAME_MAXLEN 8
 const pm_char * eeBackupModel(uint8_t i_fileSrc)
 {
   char *buf = reusableBuffer.models.mainname;
@@ -538,25 +539,29 @@ const pm_char * eeBackupModel(uint8_t i_fileSrc)
   DIR archiveFolder;
   UINT written;
 
+#ifndef SIMU
   FRESULT result = f_mount(0, &g_FATFS_Obj);
   if (result != FR_OK) {
     return SDCARD_ERROR(result);
   }
+#endif
 
   // check and create folder here
   strcpy_P(buf, STR_MODELS_PATH);
+#ifndef SIMU
   result = f_opendir(&archiveFolder, buf);
   if (result != FR_OK) {
     result = f_mkdir(buf);
     if (result != FR_OK)
       return SDCARD_ERROR(result);
   }
+#endif
 
   buf[sizeof(MODELS_PATH)-1] = '/';
   eeLoadModelName(i_fileSrc, &buf[sizeof(MODELS_PATH)]);
-  buf[sizeof(MODELS_PATH)+sizeof(g_model.name)] = '\0';
+  buf[sizeof(MODELS_PATH)+FILENAME_MAXLEN] = '\0';
 
-  uint8_t i = sizeof(MODELS_PATH)+sizeof(g_model.name)-1;
+  uint8_t i = sizeof(MODELS_PATH)+FILENAME_MAXLEN-1;
   uint8_t len = 0;
   while (i>sizeof(MODELS_PATH)-1) {
     if (!len && buf[i])
@@ -576,6 +581,11 @@ const pm_char * eeBackupModel(uint8_t i_fileSrc)
 
   strcpy_P(&buf[len], STR_MODELS_EXT);
 
+#ifdef SIMU
+  printf("SD-card backup filename=%s\n", buf); fflush(stdout);
+  FRESULT
+#endif
+
   result = f_open(&archiveFile, buf, FA_OPEN_ALWAYS | FA_WRITE);
   if (result != FR_OK) {
     return SDCARD_ERROR(result);
diff --git a/src/ersky9x/gtime.cpp b/src/ersky9x/gtime.cpp
index ebe0069dd..3830a7cff 100644
--- a/src/ersky9x/gtime.cpp
+++ b/src/ersky9x/gtime.cpp
@@ -479,7 +479,7 @@ __mktime_internal (struct gtm *tp,
 
 /* Convert *TP to a gtime_t value.  */
 gtime_t
-mktime (struct gtm *tp)
+gmktime (struct gtm *tp)
 {
  // no time zone stuff. Just do the math ;)
   static gtime_t localtime_offset;
diff --git a/src/ersky9x/gtime.h b/src/ersky9x/gtime.h
index b275827cf..8126d8375 100644
--- a/src/ersky9x/gtime.h
+++ b/src/ersky9x/gtime.h
@@ -56,7 +56,7 @@ struct gtm
 
 extern const unsigned short int __mon_yday[2][13];
 
-extern gtime_t mktime(struct gtm *tp);
+extern gtime_t gmktime(struct gtm *tp);
 extern gtime_t filltm(gtime_t *t, struct gtm *tp);
 
 #endif
diff --git a/src/general_menus.cpp b/src/general_menus.cpp
index 1b12476ab..b3303f67a 100644
--- a/src/general_menus.cpp
+++ b/src/general_menus.cpp
@@ -423,7 +423,7 @@ void menuProcTime(uint8_t event)
       if (sub >= 0 && s_editMode<=0) // set the date and time into RTC chip
       {
         g_ms100 = 0; // start of next second begins now
-        g_unixTime = mktime(&t); // update local timestamp and get wday calculated
+        g_unixTime = gmktime(&t); // update local timestamp and get wday calculated
 
         RTC rtc;
         rtc.year = t.tm_year + 1900;
diff --git a/src/gruvin9x/gtime.cpp b/src/gruvin9x/gtime.cpp
index ebe0069dd..60d8d6f63 100644
--- a/src/gruvin9x/gtime.cpp
+++ b/src/gruvin9x/gtime.cpp
@@ -31,7 +31,7 @@
  *
  */
 
-#include "gtime.h"
+#include "../open9x.h"
 
 #define LEAP_SECONDS_POSSIBLE 0
 
@@ -479,7 +479,7 @@ __mktime_internal (struct gtm *tp,
 
 /* Convert *TP to a gtime_t value.  */
 gtime_t
-mktime (struct gtm *tp)
+gmktime (struct gtm *tp)
 {
  // no time zone stuff. Just do the math ;)
   static gtime_t localtime_offset;
diff --git a/src/gruvin9x/gtime.h b/src/gruvin9x/gtime.h
index b275827cf..8126d8375 100644
--- a/src/gruvin9x/gtime.h
+++ b/src/gruvin9x/gtime.h
@@ -56,7 +56,7 @@ struct gtm
 
 extern const unsigned short int __mon_yday[2][13];
 
-extern gtime_t mktime(struct gtm *tp);
+extern gtime_t gmktime(struct gtm *tp);
 extern gtime_t filltm(gtime_t *t, struct gtm *tp);
 
 #endif
diff --git a/src/gruvin9x/sdcard.h b/src/gruvin9x/sdcard.h
index 028edeeda..30c6e0062 100644
--- a/src/gruvin9x/sdcard.h
+++ b/src/gruvin9x/sdcard.h
@@ -53,7 +53,7 @@ extern FIL g_oLogFile;
 extern void initLogs();
 extern void writeLogs();
 
-const pm_char *SDCARD_ERROR(FRESULT result)
+inline const pm_char *SDCARD_ERROR(FRESULT result)
 {
   if (result == FR_NOT_READY)
     return STR_NO_SDCARD;