diff --git a/software/common/bootloader/bootloader.c b/software/common/bootloader/bootloader.c
index a0d402f34a7a5572b0a831489d28f3dbdd64d1be..9a9996a9c24a2f7ce2ef7bd437041a47233e0f54 100644
--- a/software/common/bootloader/bootloader.c
+++ b/software/common/bootloader/bootloader.c
@@ -71,8 +71,8 @@ void UartStdOutInit(void)
     if ((CMSDK_UART2->STATE & 1)==0) CMSDK_UART2->DATA = 0x7e; // write 8'b01111110 / "~"
     } else { // EXTIO mode - Data on UART1
     CMSDK_UART1->CTRL    = 0x00; //re-init
-    CMSDK_UART1->CTRL    = UART_CTRL_TXRXEN; //RX+TX, EXTIO 
-    if ((CMSDK_UART1->STATE & 1)==0) CMSDK_UART1->DATA = 0x7e; // write 8'b01111110 / "~"
+//    CMSDK_UART1->CTRL    = UART_CTRL_TXRXEN; //RX+TX, EXTIO 
+//    if ((CMSDK_UART1->STATE & 1)==0) CMSDK_UART1->DATA = 0x7e; // write 8'b01111110 / "~"
     }
     CMSDK_USRT2->CTRL    = 0x00; //re-init
     CMSDK_USRT2->CTRL    = UART_CTRL_TXRXEN; //RX+TX, FT1248/EXTIO USRT
@@ -157,14 +157,16 @@ int main (void)
   else
     UartPuts("EXTIO8x4CD");
   UartPuts(" 20241212\n");
+/*
   NVIC_EnableIRQ(UARTRX1_IRQn);
   NVIC_EnableIRQ(UARTTX1_IRQn);
   CMSDK_UART1->CTRL = UART_CTRL_RXIRQEN; // Enable RX interrupt
-  
+*/  
   FlashLoader();
   return 0;
 }
 
+/*
 void UARTRX1_Handler(void)
 {
   uart1_char = CMSDK_UART1->DATA; // read and store the byte received
@@ -180,3 +182,4 @@ void UARTTX1_Handler(void)
   CMSDK_UART1->CTRL = UART_CTRL_RXIRQEN; // Re-Enable RX interrupt
   return;
 }
+*/
diff --git a/testcodes/bootloader/bootloader.hex b/testcodes/bootloader/bootloader.hex
index 68133be5984446712a3f0283c8244129b70cc9ca..4a91c68ec2c4740520853b11bb5a8c26687794e4 100644
--- a/testcodes/bootloader/bootloader.hex
+++ b/testcodes/bootloader/bootloader.hex
@@ -2,16 +2,16 @@
 04
 00
 30
-15
-03
+C9
+02
 00
 10
-1D
-03
+D1
+02
 00
 10
-1F
-03
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 10
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@@ -42,8 +42,8 @@
 00
 00
 00
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 10
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@@ -54,140 +54,140 @@
 00
 00
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 00
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-03
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 00
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-27
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@@ -250,11 +250,11 @@ AB
 43
 18
 47
-BC
+70
 02
 00
 00
-DC
+90
 02
 00
 00
@@ -324,8 +324,8 @@ B5
 BD
 00
 F0
-05
-F9
+DF
+F8
 11
 46
 FF
@@ -334,12 +334,12 @@ F7
 FF
 00
 F0
-60
+59
 F8
 00
 F0
-1D
-F9
+F7
+F8
 03
 B4
 FF
@@ -350,8 +350,8 @@ FF
 BC
 00
 F0
-23
-F9
+FD
+F8
 00
 00
 00
@@ -367,68 +367,56 @@ F9
 00
 00
 30
-B4
-41
-4C
-20
+4A
+10
 68
-7E
-23
-00
-06
 00
 21
-03
-22
+00
+06
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 28
-0C
+0D
 DA
-3E
+2E
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 81
 60
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-03
-60
-37
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 48
 81
 60
-82
+03
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+81
 60
 41
 68
@@ -440,11 +428,9 @@ D1
 21
 01
 60
-30
-BC
 70
 47
-32
+24
 49
 4A
 68
@@ -482,7 +468,7 @@ D1
 BD
 10
 B5
-29
+1C
 4C
 20
 68
@@ -490,7 +476,7 @@ B5
 28
 0B
 D0
-28
+1B
 A0
 FF
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@@ -510,11 +496,11 @@ F3
 8F
 FF
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-B1
+B8
 FF
 10
 BD
-26
+19
 A0
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@@ -532,15 +518,15 @@ E7
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 FF
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-AC
+B3
 FF
-24
+17
 A0
 FF
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 D6
 FF
-16
+08
 48
 00
 68
@@ -548,7 +534,7 @@ FF
 06
 03
 D5
-2A
+1C
 A0
 FF
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@@ -556,80 +542,26 @@ CF
 FF
 02
 E0
-2B
+1D
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 FF
 F7
 CB
 FF
-2C
+1F
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 FF
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@@ -754,14 +686,6 @@ F0
 0A
 00
 00
-00
-E1
-00
-E0
-00
-00
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-30
 04
 49
 03
@@ -782,7 +706,7 @@ E0
 1C
 4E
 0E
-04
+00
 00
 00
 30
@@ -818,8 +742,8 @@ E7
 47
 00
 00
-05
-03
+B9
+02
 00
 10
 C1
@@ -922,15 +846,15 @@ C0
 46
 FF
 F7
-DC
-FE
+02
+FF
 10
 BD
 00
 48
 70
 47
-08
+04
 00
 00
 30
@@ -950,7 +874,7 @@ E7
 47
 00
 00
-D8
+8C
 03
 00
 10
@@ -958,7 +882,7 @@ D8
 00
 00
 30
-08
+04
 00
 00
 00
@@ -966,15 +890,15 @@ D8
 01
 00
 10
-E0
+90
 03
 00
 10
-08
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 00
 00
 30
-60
+64
 04
 00
 00
@@ -983,10 +907,6 @@ E0
 00
 10
 00
-00
-00
-00
-00
 1C
 4E
 0E