diff --git a/bsp/m16c62p/interrupts.s34 b/bsp/m16c62p/interrupts.s34
new file mode 100644
index 0000000000..d2f0bec954
--- /dev/null
+++ b/bsp/m16c62p/interrupts.s34
@@ -0,0 +1,69 @@
+/*
+ * File      : interrupt.s34
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2009, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-04-20     fify      the first version
+ *
+ * For       : Renesas M16C
+ * Toolchain : IAR's EW for M16C v3.401
+*/
+
+        PUBLIC  rt_hw_timer_handler
+        PUBLIC  rt_hw_uart0_receive_handler
+        
+        EXTERN  rt_thread_switch_interrput_flag
+        EXTERN  rt_interrupt_from_thread
+        EXTERN  rt_interrupt_to_thread
+        EXTERN  rt_interrupt_enter        
+        EXTERN  rt_interrupt_leave
+        EXTERN  rt_tick_increase
+        EXTERN  u0rec_handler
+        
+        RSEG    CSTACK
+        RSEG    ISTACK
+        RSEG    CODE:CODE:NOROOT(2)
+
+rt_hw_context_switch_interrupt_do
+    MOV.W    #0, rt_thread_switch_interrput_flag    
+    MOV.W    rt_interrupt_from_thread, A0
+    STC      ISP, [A0]    
+    
+    MOV.W    rt_interrupt_to_thread, A0
+    LDC      [A0], ISP
+    POPM     R0,R1,R2,R3,A0,A1,SB,FB             ; Restore all processor registers from the new task's stack
+    REIT
+    
+    .EVEN
+rt_hw_timer_handler:
+    PUSHM    R0,R1,R2,R3,A0,A1,SB,FB             ; Save current task's registers
+    JSR      rt_interrupt_enter                   
+    JSR      rt_tick_increase                           
+    JSR      rt_interrupt_leave
+
+    CMP.W    #1,rt_thread_switch_interrput_flag
+    JEQ      rt_hw_context_switch_interrupt_do
+    
+    POPM     R0,R1,R2,R3,A0,A1,SB,FB             ; Restore current task's registers
+    REIT                                         ; Return from interrup
+
+    .EVEN
+rt_hw_uart0_receive_handler:
+    PUSHM    R0,R1,R2,R3,A0,A1,SB,FB             ; Save current task's registers
+    JSR      rt_interrupt_enter 
+    JSR      u0rec_handler                         
+    JSR      rt_interrupt_leave
+
+    CMP.W    #1, rt_thread_switch_interrput_flag
+    JEQ      rt_hw_context_switch_interrupt_do
+    
+    POPM     R0,R1,R2,R3,A0,A1,SB,FB             ; Restore current task's registers
+    REIT                                         ; Return from interrup
+
+        END
diff --git a/bsp/m16c62p/rtt2m16c.ewp b/bsp/m16c62p/rtt2m16c.ewp
index 86d9d6de5c..8bb437f6d2 100644
--- a/bsp/m16c62p/rtt2m16c.ewp
+++ b/bsp/m16c62p/rtt2m16c.ewp
@@ -1773,6 +1773,9 @@
       <file>
         <name>$PROJ_DIR$\cstartup.s34</name>
       </file>
+      <file>
+        <name>$PROJ_DIR$\interrupts.s34</name>
+      </file>
       <file>
         <name>$PROJ_DIR$\lnkm30627fhp.xcl</name>
       </file>
diff --git a/libcpu/m16c/context.asm b/libcpu/m16c/context.asm
index f131b94eff..29c8656ba7 100644
--- a/libcpu/m16c/context.asm
+++ b/libcpu/m16c/context.asm
@@ -11,6 +11,7 @@
  * Date           Author       Notes
  * 2010-04-09     fify         the first version
  * 2010-04-19     fify         rewrite rt_hw_interrupt_disable/enable fuction
+ * 2010-04-20     fify         move peripheral ISR to bsp/interrupts.s34 
  *
  * For       : Renesas M16C
  * Toolchain : IAR's EW for M16C v3.401
@@ -25,18 +26,12 @@
     EXTERN    rt_thread_switch_interrput_flag
     EXTERN    rt_interrupt_from_thread
     EXTERN    rt_interrupt_to_thread
-    EXTERN    rt_interrupt_enter
-    EXTERN    rt_tick_increase
-    EXTERN    rt_interrupt_leave
-    EXTERN    u0rec_handler
 
     PUBLIC    rt_hw_interrupt_disable
     PUBLIC    rt_hw_interrupt_enable    
     PUBLIC    rt_hw_context_switch_to
     PUBLIC    rt_hw_context_switch
     PUBLIC    rt_hw_context_switch_interrupt
-    PUBLIC    rt_hw_timer_handler
-    PUBLIC    rt_hw_uart0_receive_handler
     PUBLIC    os_context_switch
 
 rt_hw_interrupt_disable
@@ -92,40 +87,4 @@ jump
     MOV.W    R1, rt_interrupt_to_thread
     RTS
 
-rt_hw_context_switch_interrupt_do
-    MOV.W    #0, rt_thread_switch_interrput_flag    
-    MOV.W    rt_interrupt_from_thread, A0
-    STC      ISP, [A0]    
-    
-    MOV.W    rt_interrupt_to_thread, A0
-    LDC      [A0], ISP
-    POPM     R0,R1,R2,R3,A0,A1,SB,FB             ; Restore all processor registers from the new task's stack
-    REIT
-    
-    .EVEN
-rt_hw_timer_handler:
-    PUSHM    R0,R1,R2,R3,A0,A1,SB,FB             ; Save current task's registers
-    JSR      rt_interrupt_enter                   
-    JSR      rt_tick_increase                           
-    JSR      rt_interrupt_leave
-
-    CMP.W    #1,rt_thread_switch_interrput_flag
-    JEQ      rt_hw_context_switch_interrupt_do
-    
-    POPM     R0,R1,R2,R3,A0,A1,SB,FB             ; Restore current task's registers
-    REIT                                         ; Return from interrup
-
-    .EVEN
-rt_hw_uart0_receive_handler:
-    PUSHM    R0,R1,R2,R3,A0,A1,SB,FB             ; Save current task's registers
-    JSR      rt_interrupt_enter 
-    JSR      u0rec_handler                         
-    JSR      rt_interrupt_leave
-
-    CMP.W    #1, rt_thread_switch_interrput_flag
-    JEQ      rt_hw_context_switch_interrupt_do
-    
-    POPM     R0,R1,R2,R3,A0,A1,SB,FB             ; Restore current task's registers
-    REIT                                         ; Return from interrup
-
     END