diff --git a/src/main.c b/src/main.c
index 653e2905..3661f0ff 100755
--- a/src/main.c
+++ b/src/main.c
@@ -1148,7 +1148,8 @@ void loadgbrom(display_context_t disp, TCHAR *rom_path)
         }
     }
 }
-void loadmsx2rom(display_context_t disp, TCHAR *rom_path)
+
+void loadggrom(display_context_t disp, TCHAR *rom_path) //TODO: this could be merged with MSX
 {
 
     FRESULT romresult;
@@ -1160,12 +1161,12 @@ void loadmsx2rom(display_context_t disp, TCHAR *rom_path)
     {
         int romfsize = f_size(&romfile);
 
-        //max 128KB rom
-        if (romfsize > 128 * 1024)
+        //max 512KB rom
+        if (romfsize > 512 * 1024)
         {
             //error
 
-            drawShortInfoBox(disp, "  error: rom > 128KB", 1);
+            drawShortInfoBox(disp, "  error: rom > 512KB", 1);
             input_mapping = abort_screen;
 
             return;
@@ -1177,7 +1178,7 @@ void loadmsx2rom(display_context_t disp, TCHAR *rom_path)
             FRESULT result;
             FIL file;
             UINT bytesread;
-            result = f_open(&file, "/"ED64_FIRMWARE_PATH"/ultraMSX2.z64", FA_READ);
+            result = f_open(&file, "/"ED64_FIRMWARE_PATH"/UltraSMS.z64", FA_READ);
 
             if (result == FR_OK)
             {
@@ -1198,7 +1199,7 @@ void loadmsx2rom(display_context_t disp, TCHAR *rom_path)
                 romresult =
                 f_read (
                     &romfile,           /* [IN] File object */
-                    (void *)0xb0000000 + 0x2df48,  /* [OUT] Buffer to store read data */ //TODO: why is the offset this particular number
+                    (void *)0xb0000000 + 0x1b410,  /* [OUT] Buffer to store read data */ //TODO: why is the offset this particular number
                     romfsize,           /* [IN] Number of bytes to read */
                     &rombytesread       /* [OUT] Number of bytes read */
                 );
@@ -1218,8 +1219,7 @@ void loadmsx2rom(display_context_t disp, TCHAR *rom_path)
         }
     }
 }
-
-void loadggrom(display_context_t disp, TCHAR *rom_path) //TODO: this could be merged with MSX
+void loadmsx2rom(display_context_t disp, TCHAR *rom_path)
 {
 
     FRESULT romresult;
@@ -1231,8 +1231,8 @@ void loadggrom(display_context_t disp, TCHAR *rom_path) //TODO: this could be me
     {
         int romfsize = f_size(&romfile);
 
-        //max 512KB rom
-        if (romfsize > 512 * 1024)
+        //max 128KB rom
+        if (romfsize > 128 * 1024)
         {
             //error
 
@@ -1248,7 +1248,7 @@ void loadggrom(display_context_t disp, TCHAR *rom_path) //TODO: this could be me
             FRESULT result;
             FIL file;
             UINT bytesread;
-            result = f_open(&file, "/"ED64_FIRMWARE_PATH"/UltraSMS.z64", FA_READ);
+            result = f_open(&file, "/"ED64_FIRMWARE_PATH"/ultraMSX2.z64", FA_READ);
 
             if (result == FR_OK)
             {
@@ -1269,7 +1269,7 @@ void loadggrom(display_context_t disp, TCHAR *rom_path) //TODO: this could be me
                 romresult =
                 f_read (
                     &romfile,           /* [IN] File object */
-                    (void *)0xb0000000 + 0x1b410,  /* [OUT] Buffer to store read data */ //TODO: why is the offset this particular number
+                    (void *)0xb0000000 + 0x2df48,  /* [OUT] Buffer to store read data */ //TODO: why is the offset this particular number
                     romfsize,           /* [IN] Number of bytes to read */
                     &rombytesread       /* [OUT] Number of bytes read */
                 );
@@ -4079,6 +4079,8 @@ void handleInput(display_context_t disp, sprite_t *contr)
                 }
                 else if (!strcmp(extension, "MPK"))
                 { //mpk file
+                  while (!(disp = display_lock()))
+                  ;
                     clearScreen(disp);
                     drawBoxNumber(disp, 4);
                     display_show(disp);
@@ -4131,8 +4133,8 @@ void handleInput(display_context_t disp, sprite_t *contr)
                         new_scroll_pos(&cursor, &page, MAX_LIST, count);
                         clearScreen(disp); //part clear?
                         display_dir(list, cursor, page, MAX_LIST, count, disp);
-                        view_mpk(disp);
                         drawBoxNumber(disp, 4);
+                        view_mpk(disp);
                         display_show(disp);
                         if (sound_on)
                             playSound(2);
diff --git a/src/memorypak.c b/src/memorypak.c
index 343bf92d..341f8c8f 100755
--- a/src/memorypak.c
+++ b/src/memorypak.c
@@ -187,8 +187,8 @@ void view_mpk_file(display_context_t disp, char *mpk_filename)
             32768,         /* [IN] Number of bytes to read */
             &bytesread    /* [OUT] Number of bytes read */
         );
-        
-          
+
+
         f_close(&file);
 
         printText("File contents:", 11, 5, disp);
@@ -305,7 +305,7 @@ void view_mpk_file(display_context_t disp, char *mpk_filename)
         else
         {
             printText("empty", 11, -1, disp);
-        }    
+        }
     }
 }
 
@@ -420,7 +420,7 @@ void mpk_to_file(display_context_t disp, char *mpk_filename, int quick)
     if (result == FR_OK)
     {
         controller_init();
-        
+
         int err = 0;
         for (int j = 0; j < 128; j++)
         {
@@ -438,9 +438,9 @@ void mpk_to_file(display_context_t disp, char *mpk_filename, int quick)
 
         f_close(&file);
 
-        
+
         sprintf(buff, "File: %s%i.MPK", mpk_filename, v);
-    
+
         printText(buff, 9, -1, disp);
         printText("backup done...", 9, -1, disp);
     }