diff --git a/snes/fatfstest/dump_mrdo.txt b/snes/fatfstest/dump_mrdo.txt
new file mode 100644
index 0000000..83433c5
--- /dev/null
+++ b/snes/fatfstest/dump_mrdo.txt
@@ -0,0 +1,20 @@
+00000000  18 fb 78 c2 10 e2 20 a2  ff 01 9a a9 00 48 ab a9  |..x... ......H..|
+00000010  8f 8d 00 21 a9 03 9c 00  42 8d 01 21 9c 02 21 9c  |...!....B..!..!.|
+00000020  03 21 a9 09 8d 05 21 9c  06 21 9c 07 21 9c 08 21  |.!....!..!..!..!|
+00000030  9c 09 21 9c 0a 21 9c 0b  21 9c 0c 21 9c 0d 21 9c  |..!..!..!..!..!.|
+00000040  0d 21 9c 0e 21 9c 0e 21  9c 0f 21 9c 0f 21 9c 10  |.!..!..!..!..!..|
+00000050  21 9c 10 21 9c 11 21 9c  11 21 9c 12 21 9c 12 21  |!..!..!..!..!..!|
+00000060  9c 13 21 9c 13 21 9c 14  21 9c 14 21 a9 80 8d 15  |..!..!..!..!....|
+00000070  21 9c 16 21 9c 17 21 9c  1a 21 9c 1b 21 a9 01 8d  |!..!..!..!..!...|
+00000080  1b 21 9c 1c 21 9c 1c 21  9c 1d 21 9c 1d 21 9c 1e  |.!..!..!..!..!..|
+00000090  21 8d 1e 21 9c 1f 21 9c  1f 21 9c 20 21 9c 20 21  |!..!..!..!. !. !|
+
+
+Bank: 0x01 Addr: 0x008000 Block: 0x0040 CRC 0xb8ec
+Bank: 0x02 Addr: 0x010000 Block: 0x0080 CRC 0x9b9b
+Bank: 0x03 Addr: 0x018000 Block: 0x00c0 CRC 0x798e
+Bank: 0x04 Addr: 0x020000 Block: 0x0100 CRC 0x1092
+Bank: 0x05 Addr: 0x028000 Block: 0x0140 CRC 0x9d0c
+Bank: 0x06 Addr: 0x030000 Block: 0x0180 CRC 0xf960
+Bank: 0x07 Addr: 0x038000 Block: 0x01c0 CRC 0x20ed
+Bank: 0x08 Addr: 0x040000 Block: 0x0200 CRC 0xe5a3
diff --git a/snes/fatfstest/main.c b/snes/fatfstest/main.c
index f41d4c6..36b6c60 100644
--- a/snes/fatfstest/main.c
+++ b/snes/fatfstest/main.c
@@ -13,14 +13,22 @@
 #include "debug.h"
 #include "crc.h"
 
-    /*
-     *   o debug STA global o optimize internal transfer buffer o direct write to mempage o relocate main code o exec loaded file 
-     */
+/*
+
+o relocate main code
+o exec loaded file
+
+o debug STA global
+o optimize internal transfer buffer
+o direct writeto mempage
 
 
-#define ROM_NAME "MRDO.SMC"
-#define BLOCK_SIZE 512
-#define BASE_ADDR 0x008000
+*/
+
+
+#define ROM_NAME        "MRDO.SMC"
+#define BLOCK_SIZE      512
+#define BASE_ADDR       0x008000
 
 padStatus pad1;
 DWORD acc_size;                 /* Work register for fs command */
@@ -114,16 +122,12 @@ void wait(void)
 {
     printfc("SNES::wait: press A to continue\n");
     enablePad();
-
-    // waitForVBlank();
     pad1 = readPad((byte) 0);
     while (!pad1.A) {
         waitForVBlank();
         pad1 = readPad((byte) 0);
     }
     printfc("SNES::wait: done\n");
-
-    // disablePad();
 }
 
 void boot(void)
@@ -233,9 +237,8 @@ void boot(void)
         printfc("SNES::main: read cnt=%i p1=%li p2=%li s2=%i\n", cnt,
                 p1, p2, s2);
 
-        // printfc("SNES::main: file %x %x %x
-        // %x\n",Buff[0],Buff[1],Buff[2],Buff[3]);
-        if (res != FR_OK) {
+
+       if (res != FR_OK) {
             printfc("SNES::main: read failed\n");
             put_rc(res);
             break;
@@ -247,27 +250,21 @@ void boot(void)
         }
         printfs(1 + bank, "BANK %X  ADDR %LX", bank, addr);
 
-        /*
-         *  for (i=0; i<BLOCK_SIZE; i++){ *(byte*)(addr + i) = Buff[i]; } 
-         */
-        printfc("SNES::main: mem  %x %x %x %x %lx\n",
+        printfc("SNES::main: mem  %x %x %x %x %x\n",
                 *(byte *) (addr + 0), *(byte *) (addr + 1),
-                *(byte *) (addr + 2), *(byte *) (addr + 3), addr);
+                *(byte *) (addr + 2), *(byte *) (addr + 3));
 
-        // if (addr=0x10fe00){
+#if 0
         printc_packet(addr, 512, (byte *) (addr));
-
-        // }
+#endif
         addr += s2;
         if (addr % 0x10000 == 0) {
-
-            // crc = crc_update_mem(crc_addr,0x8000);
-            // printfc("addr=%lx crc=%x\n",crc_addr,crc);
-            // printfs(1 + bank,"BANK %X ADDR %LX CRC
-            // %X",bank,addr,crc);
+            crc = crc_update_mem(crc_addr,0x8000);
+            printfc("addr=%lx crc=%x\n",crc_addr,crc);
+            wait();
+            printfs(1 + bank,"BANK %X ADDR %LX CRC %X",bank,addr,crc);
             addr += 0x8000;
-
-            // crc_addr+=0x8000;
+            crc_addr+=0x8000;
             bank++;
         }
     }
diff --git a/tools/bsnes/chip/fatfs/config.h b/tools/bsnes/chip/fatfs/config.h
index c9b48f0..639399d 100644
--- a/tools/bsnes/chip/fatfs/config.h
+++ b/tools/bsnes/chip/fatfs/config.h
@@ -17,5 +17,6 @@
 #define SHARED_MAX_SIZE     512
 #define SHARED_ADDR     0x3d0000
 
-#undef MMIO_DEBUG
-#undef FATFS_DEBUG
+#undef  MMIO_DEBUG
+#undef  FATFS_DEBUG
+#define DISKIO_DEBUG 1
\ No newline at end of file
diff --git a/tools/bsnes/chip/fatfs/diskio.cpp b/tools/bsnes/chip/fatfs/diskio.cpp
index ad6c529..161dae9 100644
--- a/tools/bsnes/chip/fatfs/diskio.cpp
+++ b/tools/bsnes/chip/fatfs/diskio.cpp
@@ -1,6 +1,7 @@
 
 #include "integer.h"
 #include "diskio.h"
+#include "config.h"
 
 static volatile
 DSTATUS Stat = STA_NOINIT;  /* Disk status */
@@ -47,7 +48,7 @@ DSTATUS disk_initialize (BYTE drv) {
 
     int fd = open(IMAGE_NAME, O_RDWR);
     if (fd == -1) {
-   	    perror("DISKIO::disk_initialize: Error opening file for writing");
+   	    perror("BSNES::disk_initialize: Error opening file for writing");
    	    exit(EXIT_FAILURE);
       }
 
@@ -55,12 +56,12 @@ DSTATUS disk_initialize (BYTE drv) {
     lseek(fd,0,SEEK_SET);
     
     image_addr = (BYTE*)mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    #ifdef MMIO_DEBUG
-    printf("DISKIO::disk_initialize: Open Image (size %i) %p\n",size,image_addr);
+    #ifdef DISKIO_DEBUG
+    printf("BSNES::disk_initialize: Open Image (size %i) %p\n",size,image_addr);
     #endif
     if (image_addr == MAP_FAILED) {
 	    close(fd);
-	    perror("DISKIO::disk_initialize: Error mmapping the file");
+	    perror("BSNES::disk_initialize: Error mmapping the file");
         exit(EXIT_FAILURE);
     }
     
@@ -96,13 +97,13 @@ DRESULT disk_read (
 
     DWORD offset = sector  * 512;
     int size = count * 512;
-    //#ifdef MMIO_DEBUG
-    printf("DISKIO::disk_read: sector=%li count=%i addr=%p off=%li size=%i\n",sector,count,image_addr + offset,offset,size);
-    //#endif
+    #ifdef DISKIO_DEBUG
+    printf("BSNES::disk_read: sector=%li count=%i addr=%p off=%li size=%i\n",sector,count,image_addr + offset,offset,size);
+    printf("BSNES::disk_read: %02x %02x %02x %02x\n",buff[0],buff[1],buff[2],buff[3]);
+    #endif
     memcpy(buff,image_addr + offset,size);
-    printf("%x %x %x %x\n",buff[0],buff[1],buff[2],buff[3]);
-    #ifdef MMIO_DEBUG
-    printf("DISKIO::disk_read: done\n");
+    #ifdef DISKIO_DEBUG
+    printf("BSNES::disk_read: done\n");
     #endif
     return RES_OK;
 }
@@ -125,8 +126,8 @@ DRESULT disk_write (
 
     DWORD offset = sector  * 512;
     int size = count * 512;
-    #ifdef MMIO_DEBUG
-    printf("disk_write: sector=%li count=%i addr=%p off=%li size=%i\n",sector,count,image_addr + offset,offset,size);
+    #ifdef DISKIO_DEBUG
+    printf("BSNES::disk_write: sector=%li count=%i addr=%p off=%li size=%i\n",sector,count,image_addr + offset,offset,size);
     #endif
     memcpy(image_addr + offset,buff,size);
     return RES_OK;
@@ -152,22 +153,22 @@ DRESULT disk_ioctl (
 
     switch (ctrl) {
         case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */
-    #ifdef MMIO_DEBUG
-            printf("disk_ioctl: GET_SECTOR_COUNT\n");
+    #ifdef DISKIO_DEBUG
+            printf("BSNES::disk_ioctl: GET_SECTOR_COUNT\n");
     #endif
             ofs = 60; w = 2; n = 0;
             break;
 
         case GET_SECTOR_SIZE :  /* Get sectors on the disk (WORD) */
-    #ifdef MMIO_DEBUG
-            printf("disk_ioctl: GET_SECTOR_SIZE\n");
+    #ifdef DISKIO_DEBUG
+            printf("BSNES::disk_ioctl: GET_SECTOR_SIZE\n");
     #endif
             *(WORD*)buff = 512;
             return RES_OK;
 
         case GET_BLOCK_SIZE :   /* Get erase block size in sectors (DWORD) */
-    #ifdef MMIO_DEBUG
-            printf("disk_ioctl: GET_BLOCK_SIZE\n");
+    #ifdef DISKIO_DEBUG
+            printf("BSNES::disk_ioctl: GET_BLOCK_SIZE\n");
     #endif
             *(DWORD*)buff = 32;
             return RES_OK;
diff --git a/tools/bsnes/chip/fatfs/fatfs.cpp b/tools/bsnes/chip/fatfs/fatfs.cpp
index 974c7fc..3699011 100644
--- a/tools/bsnes/chip/fatfs/fatfs.cpp
+++ b/tools/bsnes/chip/fatfs/fatfs.cpp
@@ -6,8 +6,6 @@
 #include "diskio.h"
 #include "config.h"
 
-
-
 void FATFS::init() {
   command = CMD_NONE;
   sector = 0;
@@ -61,7 +59,7 @@ uint8 FATFS::mmio_read(unsigned addr) {
   addr &= 0xffff;
   if (addr == MMIO_RETVAL){
       #ifdef FATFS_DEBUG
-      printf("FATFS::mmio_read retal=%i\n",retval);
+      printf("BSNES::mmio_read retal=%i\n",retval);
       #endif
       return retval;
   }
@@ -71,33 +69,33 @@ uint8 FATFS::mmio_read(unsigned addr) {
 void FATFS::mmio_write(unsigned addr, uint8 data) {
   addr &= 0xffff;
   #ifdef FATFS_DEBUG
-  printf("FATFS::mmio_write 0x%04x 0x%02x (%i)\n",addr,data,data);
+  printf("BSNES::mmio_write 0x%04x 0x%02x (%i)\n",addr,data,data);
   #endif
   if (addr == 0x3010){
       switch(data){
           case CMD_INIT:
               #ifdef FATFS_DEBUG
-              printf("FATFS::mmio_write CMD_INIT \n");
+              printf("BSNES::mmio_write CMD_INIT \n");
               #endif
               command = CMD_INIT;
               retval = disk_initialize(0);
               break;
           case CMD_READ:
               #ifdef FATFS_DEBUG
-              printf("FATFS::mmio_write CMD_READ \n");
+              printf("BSNES::mmio_write CMD_READ \n");
               #endif
               command = CMD_READ;
               break;
           case CMD_WRITE:
               command = CMD_WRITE;
               #ifdef FATFS_DEBUG
-              printf("FATFS::mmio_write CMD_WRITE \n");
+              printf("BSNES::mmio_write CMD_WRITE \n");
               #endif
               break;
           default:
               command = CMD_NONE;
               #ifdef FATFS_DEBUG
-              printf("FATFS::mmio_write CMD_NONE \n");
+              printf("BSNES::mmio_write CMD_NONE \n");
               #endif
               break;
       }
@@ -106,13 +104,13 @@ void FATFS::mmio_write(unsigned addr, uint8 data) {
   if (addr >= MMIO_SECTOR01 && addr <= MMIO_SECTOR04){
       sector = data << ( (3 - ( addr - MMIO_SECTOR01))  << 3);
       #ifdef FATFS_DEBUG
-      printf("FATFS::mmio_write set sector: byte=%i val=%i sector=%i \n",(3 - ( addr - MMIO_SECTOR01)),data,sector);
+      printf("BSNES::mmio_write set sector: byte=%i val=%i sector=%i \n",(3 - ( addr - MMIO_SECTOR01)),data,sector);
       #endif
   }
   if (addr == MMIO_COUNT){
       count = data;
       #ifdef FATFS_DEBUG
-      printf("FATFS::mmio_write set count: count=%i \n",count);
+      printf("BSNES::mmio_write set count: count=%i \n",count);
       #endif
       if (command == CMD_READ) {
           retval = disk_read (0, (BYTE*)scratch_buffer, sector, count);
@@ -123,13 +121,13 @@ void FATFS::mmio_write(unsigned addr, uint8 data) {
             retval = disk_write (0, (BYTE*)scratch_buffer, sector, count);
       } else{
             #ifdef FATFS_DEBUG
-            printf("FATFS::mmio_write set offset: no command to trigger \n");
+            printf("BSNES::mmio_write set offset: no command to trigger \n");
             #endif
       }
   }
   if (addr == MMIO_RETVAL){
       #ifdef FATFS_DEBUG
-      printf("FATFS::mmio_write reg 0x3016 reset\n");
+      printf("BSNES::mmio_write reg 0x3016 reset\n");
       #endif
       retval = STA_VOID;
   }
diff --git a/tools/ffsample/linux/fftest b/tools/ffsample/linux/fftest
index 7f68ddd..7e00484 100755
Binary files a/tools/ffsample/linux/fftest and b/tools/ffsample/linux/fftest differ