diff --git a/tests/platform/writeExtFlash_MDx.c b/tests/platform/writeExtFlash_MDx.c
index 10e486ab..2b028c3a 100644
--- a/tests/platform/writeExtFlash_MDx.c
+++ b/tests/platform/writeExtFlash_MDx.c
@@ -24,8 +24,8 @@
 #include "W25Qx.h"
 
 
-static const uint32_t sector_address = 0;
-static const uint32_t block_address  = 0;
+//static const uint32_t sector_address = 0x80000;
+static const uint32_t block_address  = 0x3f000;
 
 
 uint8_t block[256] = {0};
@@ -54,31 +54,33 @@ int main()
 
         for(size_t i = 0; i < 256; i++)
         {
-            block[i] = 'a' + (i % 16);
+            //block[i] = 'a' + (i % 16);
+            block[i] = 0x00;
         }
 
-        ssize_t rv = W25Qx_writePage(block_address, block, 256);
-        printf("%ld\r\n", rv);
 
-        for(uint32_t pos = 0; pos < 0xFF; pos += 16)
+        for(uint32_t i = 0; i < 16; i++)
+            W25Qx_writePage(block_address+i * 256, block, 256);
+
+        for(uint32_t pos = 0; pos < 0x1000; pos += 16)
         {
             uint8_t buf[16];
             (void) W25Qx_readData(block_address + pos, buf, 16);
-            printf("\r\n%02lx: ", pos);
+            printf("\r\n%02lx: ", block_address + pos);
             printChunk(buf);
         }
 
-        printf("\r\n\r\nAttempting erase... ");
-        bool ok = W25Qx_eraseSector(sector_address);
-        printf("%d\r\n", ok);
+        //printf("\r\n\r\nAttempting erase... ");
+        //bool ok = W25Qx_eraseSector(sector_address);
+        //printf("%d\r\n", ok);
 
-        for(uint32_t pos = 0; pos < 0xFF; pos += 16)
-        {
-            uint8_t buf[16];
-            (void) W25Qx_readData(block_address + pos, buf, 16);
-            printf("\r\n%02lx: ", pos);
-            printChunk(buf);
-        }
+        //for(uint32_t pos = 0; pos < 0xFF; pos += 16)
+        //{
+        //    uint8_t buf[16];
+        //    (void) W25Qx_readData(block_address + pos, buf, 16);
+        //    printf("\r\n%02lx: ", pos);
+        //    printChunk(buf);
+        //}
     }
 
     return 0;