diff --git a/build/libraries/devices/sdmc/ARM7/drnand.c b/build/libraries/devices/sdmc/ARM7/drnand.c
index 1acd63e..f9007a1 100644
--- a/build/libraries/devices/sdmc/ARM7/drnand.c
+++ b/build/libraries/devices/sdmc/ARM7/drnand.c
@@ -77,6 +77,7 @@ u32 NAND_FAT1_SECTORS;
 u32 NAND_FAT2_SECTORS;
 u32 NAND_FAT3_SECTORS;
 
+void nandSetFormatRequest( u16 partition_num, u32* partition_sectors);
 void nandSetFormatRequest( u16 partition_num, u32* partition_sectors)
 {
     NAND_RAW_SECTORS  = partition_sectors[0];
@@ -258,8 +259,8 @@ int nandRtfsCtrl( int driveno, int opcode, void* pargs)
         gc.fmt.oemname[1]    = 'W';
         gc.fmt.oemname[2]    = 'L';
         gc.fmt.oemname[3]    = '\0';
-        gc.fmt.secpalloc     = NandFatSpec[pdr->partition_number].SC;    /*sectors per cluster(FIX by capacity)*/
-        gc.fmt.secreserved   = NandFatSpec[pdr->partition_number].RSC;//sdmc_current_spec.RSC;/*reserved sectors(FIX 1 at FAT12,16)*/
+        gc.fmt.secpalloc     = (u8)(NandFatSpec[pdr->partition_number].SC);    /*sectors per cluster(FIX by capacity)*/
+        gc.fmt.secreserved   = (u16)(NandFatSpec[pdr->partition_number].RSC);//sdmc_current_spec.RSC;/*reserved sectors(FIX 1 at FAT12,16)*/
         gc.fmt.numfats       = 2;
         gc.fmt.secpfat       = NandFatSpec[pdr->partition_number].SF;
         gc.fmt.numhide       = NandFatSpec[pdr->partition_number].NOM;    /**/
@@ -267,8 +268,8 @@ int nandRtfsCtrl( int driveno, int opcode, void* pargs)
         gc.fmt.mediadesc     = 0xF8;
         gc.fmt.secptrk       = NandFatSpec[pdr->partition_number].secptrack;    //CHS Recommendation
         gc.fmt.numhead       = NandFatSpec[pdr->partition_number].heads;
-        gc.fmt.numcyl        = gc.dev_geometry_cylinders;//NandFatSpec[pdr->partition_number].cylinders;
-        gc.fmt.physical_drive_no = driveno;
+        gc.fmt.numcyl        = (u16)(gc.dev_geometry_cylinders);//NandFatSpec[pdr->partition_number].cylinders;
+        gc.fmt.physical_drive_no = (u8)driveno;
         gc.fmt.binary_volume_label = BIN_VOL_LABEL;
         gc.fmt.text_volume_label[0] = '\0';
 
@@ -382,8 +383,8 @@ BOOL nandRtfsAttach( int driveno, int partition_no)
 /*SD File System Specification(仕様書)に基づいた値を出す*/
 static BOOL sdi_get_CHS_params( void)
 {
-    u16 i;
-    int mbytes;
+    u32 i;
+    u32 mbytes;
     u32 cumulative_capacity; //累計
 
     /**/
@@ -478,23 +479,23 @@ static BOOL sdi_get_CHS_params( void)
         NandFatSpec[i].device_capacity = sdmc_current_spec.memory_capacity;
 
         /*---------- デバイス全体 ----------*/
-        NandFatSpec[i].cylinders =    /*シリンダ数を計算*/
+        NandFatSpec[i].cylinders = (u16)   /*シリンダ数を計算*/
           (NandFatSpec[i].device_capacity /
            (NandFatSpec[i].heads * NandFatSpec[i].secptrack));
 
         /*memory_capacityを再計算してadjusted_memory_capacityに格納*/
-        NandFatSpec[i].adjusted_device_capacity =
-          NandFatSpec[i].cylinders *
-            (NandFatSpec[i].heads * NandFatSpec[i].secptrack);
+        NandFatSpec[i].adjusted_device_capacity = (u32)
+          (NandFatSpec[i].cylinders *
+            (NandFatSpec[i].heads * NandFatSpec[i].secptrack));
         /*----------------------------------*/
 
         /*---------- ボリューム ----------*/
-        NandFatSpec[i].volume_cylinders =    /*シリンダ数を計算*/
+        NandFatSpec[i].volume_cylinders = (u16)   /*シリンダ数を計算*/
           (NandFatSpec[i].memory_capacity /
            (NandFatSpec[i].heads * NandFatSpec[i].secptrack));
 
         /*memory_capacityを再計算してadjusted_memory_capacityに格納*/
-        NandFatSpec[i].adjusted_memory_capacity =
+        NandFatSpec[i].adjusted_memory_capacity = (u32)
           (NandFatSpec[i].volume_cylinders *
            (NandFatSpec[i].heads * NandFatSpec[i].secptrack));
         /*--------------------------------*/
@@ -550,7 +551,7 @@ static BOOL sdi_get_nom( u32 MIN_NOM)
       
         SC = NandFatSpec[i].SC;
     
-        NandFatSpec[i].SF = sdi_get_ceil( TS[i]/SC * NandFatSpec[i].FATBITS, SS*8);
+        NandFatSpec[i].SF = (u16)sdi_get_ceil( TS[i]/SC * NandFatSpec[i].FATBITS, SS*8);
 
         /*-----------------------SDHCのとき----------------------------*/
         if( sdmc_current_spec.csd_ver2_flag) {
@@ -563,7 +564,7 @@ static BOOL sdi_get_nom( u32 MIN_NOM)
                 sdmc_current_spec.NOM = sdmc_current_spec.BU;
             }
             do {
-                n = sdi_get_ceil( 2*NandFatSpec[i].SF, NandFatSpec[i].BU);
+                n = sdi_get_ceil( (u32)(2*NandFatSpec[i].SF), (u32)(NandFatSpec[i].BU));
                 NandFatSpec[i].RSC = (NandFatSpec[i].BU * n) - ( 2 * NandFatSpec[i].SF);
                 if( NandFatSpec[i].RSC < 9) {
                     NandFatSpec[i].RSC += NandFatSpec[i].BU;
@@ -612,7 +613,7 @@ static BOOL sdi_get_nom( u32 MIN_NOM)
                     }
                 }while( 1);
                 if( SFdash != NandFatSpec[i].SF) {
-                    NandFatSpec[i].SF = SFdash;
+                    NandFatSpec[i].SF = (u16)SFdash;
                 }else{
                     break;    //complete
                 }
@@ -766,18 +767,18 @@ static void sdi_build_partition_table( void)
     MI_CpuFill8( MbrSectDat, 0, 512);
 
     for( i=0; i<4; i++) {
-        MbrSectDat[(446+(i*16))/2] = (starting_head[i]<<8);
+        MbrSectDat[(446+(i*16))/2] = (u16)(starting_head[i]<<8);
         //上位8bit:starting_cylの下位8bit, 下位8bit:starting_cylの上位2bit + starting_sect 6bit.
-        MbrSectDat[(448+(i*16))/2] = (starting_cyl[i]<<8) +
-                                    ((starting_cyl[i]>>2) & 0xC0) + starting_sect[i];
-        MbrSectDat[(450+(i*16))/2] = (ending_head[i]<<8) + systemid[i];
+        MbrSectDat[(448+(i*16))/2] = (u16)((starting_cyl[i]<<8) +
+                                    ((starting_cyl[i]>>2) & 0xC0) + starting_sect[i]);
+        MbrSectDat[(450+(i*16))/2] = (u16)((ending_head[i]<<8) + systemid[i]);
         //上位8bit:ending_cylの下位8bit, 下位8bit:ending_cylの上位2bit + ending_sect 6bit.
-        MbrSectDat[(452+(i*16))/2] = (ending_cyl[i]<<8) +
-                                    ((ending_cyl[i]>>2) & 0xC0) + ending_sect[i];
-        MbrSectDat[(454+(i*16))/2] = NandFatSpec[i].NOM;
-        MbrSectDat[(456+(i*16))/2] = (NandFatSpec[i].NOM>>16);
-        MbrSectDat[(458+(i*16))/2] = total_sect[i];
-        MbrSectDat[(460+(i*16))/2] = (total_sect[i]>>16);
+        MbrSectDat[(452+(i*16))/2] = (u16)((ending_cyl[i]<<8) +
+                                    ((ending_cyl[i]>>2) & 0xC0) + ending_sect[i]);
+        MbrSectDat[(454+(i*16))/2] = (u16)(NandFatSpec[i].NOM);
+        MbrSectDat[(456+(i*16))/2] = (u16)(NandFatSpec[i].NOM>>16);
+        MbrSectDat[(458+(i*16))/2] = (u16)(total_sect[i]);
+        MbrSectDat[(460+(i*16))/2] = (u16)(total_sect[i]>>16);
     }
     MbrSectDat[510/2] = 0xAA55;
     /*セクタ0に書き込み*/
diff --git a/build/libraries/devices/sdmc/ARM7/drsdmc.c b/build/libraries/devices/sdmc/ARM7/drsdmc.c
index 341a002..57b44de 100644
--- a/build/libraries/devices/sdmc/ARM7/drsdmc.c
+++ b/build/libraries/devices/sdmc/ARM7/drsdmc.c
@@ -456,12 +456,12 @@ static void sdi_get_CHS_params( void)
     }
 
     /*シリンダ数を計算*/
-    sdmc_current_spec.cylinders = (sdmc_current_spec.memory_capacity /
+    sdmc_current_spec.cylinders = (u16)(sdmc_current_spec.memory_capacity /
                     (sdmc_current_spec.heads * sdmc_current_spec.secptrack));
     
     /*memory_capacityを再計算してadjusted_memory_capacityに格納*/
-    sdmc_current_spec.adjusted_memory_capacity = sdmc_current_spec.cylinders *
-                    (sdmc_current_spec.heads * sdmc_current_spec.secptrack);
+    sdmc_current_spec.adjusted_memory_capacity = (u32)(sdmc_current_spec.cylinders *
+                    (sdmc_current_spec.heads * sdmc_current_spec.secptrack));
 }
 
 
@@ -484,13 +484,13 @@ static void sdi_get_nom( void)
     TS = sdmc_current_spec.adjusted_memory_capacity;
     SC = sdmc_current_spec.SC;
     
-    sdmc_current_spec.SF = sdi_get_ceil( TS/SC * sdmc_current_spec.FATBITS, SS*8);
+    sdmc_current_spec.SF = (u16)sdi_get_ceil( TS/SC * sdmc_current_spec.FATBITS, SS*8);
 
     /*-----------------------SDHCのとき----------------------------*/
     if( sdmc_current_spec.csd_ver2_flag) {
         sdmc_current_spec.NOM = sdmc_current_spec.BU;
         do {
-            n = sdi_get_ceil( 2*sdmc_current_spec.SF, sdmc_current_spec.BU);
+            n = sdi_get_ceil( (u32)(2*sdmc_current_spec.SF), (u32)(sdmc_current_spec.BU));
             sdmc_current_spec.RSC = (sdmc_current_spec.BU * n) - ( 2 * sdmc_current_spec.SF);
             if( sdmc_current_spec.RSC < 9) {
                 sdmc_current_spec.RSC += sdmc_current_spec.BU;
@@ -530,7 +530,7 @@ static void sdi_get_nom( void)
                 }
             }while( 1);
             if( SFdash != sdmc_current_spec.SF) {
-                sdmc_current_spec.SF = SFdash;
+                sdmc_current_spec.SF = (u16)SFdash;
             }else{
                 break;    //complete
             }
@@ -543,7 +543,7 @@ static void sdi_get_nom( void)
 /*FATのビット数を返す*/
 static void sdi_get_fatparams( void)
 {
-    int mbytes;
+    u32 mbytes;
 
 //    mbytes = (sdmc_current_spec.card_capacity / (1024 * 1024)) * 512;
     mbytes = (sdmc_current_spec.card_capacity >> 11);
@@ -658,16 +658,16 @@ static void sdi_build_partition_table( void)
 #else
     MI_CpuFill8( MbrSectDat, 0, 512);
 #endif
-    MbrSectDat[446/2] = (starting_head<<8);
+    MbrSectDat[446/2] = (u16)(starting_head<<8);
     //上位8bit:starting_cylの下位8bit, 下位8bit:starting_cylの上位2bit + starting_sect 6bit.
-    MbrSectDat[448/2] = (starting_cyl<<8) + ((starting_cyl>>2) & 0xC0) + starting_sect;
-    MbrSectDat[450/2] = (ending_head<<8) + systemid;
+    MbrSectDat[448/2] = (u16)((starting_cyl<<8) + ((starting_cyl>>2) & 0xC0) + starting_sect);
+    MbrSectDat[450/2] = (u16)((ending_head<<8) + systemid);
     //上位8bit:ending_cylの下位8bit, 下位8bit:ending_cylの上位2bit + ending_sect 6bit.
-    MbrSectDat[452/2] = (ending_cyl<<8) + ((ending_cyl>>2) & 0xC0) + ending_sect;
-    MbrSectDat[454/2] = sdmc_current_spec.NOM;
-    MbrSectDat[456/2] = (sdmc_current_spec.NOM>>16);
-    MbrSectDat[458/2] = total_sect;
-    MbrSectDat[460/2] = (total_sect>>16);
+    MbrSectDat[452/2] = (u16)((ending_cyl<<8) + ((ending_cyl>>2) & 0xC0) + ending_sect);
+    MbrSectDat[454/2] = (u16)(sdmc_current_spec.NOM);
+    MbrSectDat[456/2] = (u16)(sdmc_current_spec.NOM>>16);
+    MbrSectDat[458/2] = (u16)total_sect;
+    MbrSectDat[460/2] = (u16)(total_sect>>16);
     MbrSectDat[510/2] = 0xAA55;
     /*セクタ0に書き込み*/
     sdmcWriteFifo( MbrSectDat, 1, 0, NULL, &SdResult);
diff --git a/build/libraries/devices/sdmc/ARM7/sdif.c b/build/libraries/devices/sdmc/ARM7/sdif.c
index f9e6f43..10e9d3c 100644
--- a/build/libraries/devices/sdmc/ARM7/sdif.c
+++ b/build/libraries/devices/sdmc/ARM7/sdif.c
@@ -782,7 +782,7 @@ u16 SD_SelectBitWidth(s16 b4bit)
   Returns:      0 : success
                 > 0 : error
  *---------------------------------------------------------------------------*/
-u16 MMCP_WriteBusWidth(s16 b4bit)
+u16 MMCP_WriteBusWidth( BOOL b4bit)
 {
     if( !SDCARD_MMCFlag) {
         return 1;
diff --git a/build/libraries/devices/sdmc/ARM7/sdif_ip.h b/build/libraries/devices/sdmc/ARM7/sdif_ip.h
index 96493b4..638af9a 100644
--- a/build/libraries/devices/sdmc/ARM7/sdif_ip.h
+++ b/build/libraries/devices/sdmc/ARM7/sdif_ip.h
@@ -321,7 +321,7 @@ void    SD_DisableClock( void);                 /* SD
 
 u16     SD_SelectBitWidth(s16 b4bit);           /* ビット幅の選択 */
 
-u16     MMCP_WriteBusWidth(s16 b4bit);
+u16     MMCP_WriteBusWidth( BOOL b4bit);
 u16     MMCP_BusTest( BOOL readflag);