diff --git a/trunk/bootrom/build/libraries/os/ARM11/os_interrupt.c b/trunk/bootrom/build/libraries/os/ARM11/os_interrupt.c
index 28f4eea..4eb2ee0 100644
--- a/trunk/bootrom/build/libraries/os/ARM11/os_interrupt.c
+++ b/trunk/bootrom/build/libraries/os/ARM11/os_interrupt.c
@@ -74,6 +74,8 @@ void osInitInterrupt( void )
         reg_OS_CPUI_PRIO = 15 << REG_OS_CPUI_PRIO_THLD_SHIFT;
         reg_OS_CPUI_BP = HW_CPUIBP_CMP_PRIO_ALL_BITS;
         reg_OS_CPUI_CNT = REG_OS_CPUI_CNT_E_MASK;
+
+        (void)osEnableInterrupts();
     }
 }
 
diff --git a/trunk/bootrom/build/libraries/os/ARM11/os_irqHandler.c b/trunk/bootrom/build/libraries/os/ARM11/os_irqHandler.c
index 8d46bb6..4ebfa21 100644
--- a/trunk/bootrom/build/libraries/os/ARM11/os_irqHandler.c
+++ b/trunk/bootrom/build/libraries/os/ARM11/os_irqHandler.c
@@ -40,8 +40,8 @@ asm void osIrqHandler( void )
         INASM_EXTERN( osIntrTable )
 
         sub     lr, lr, #4                      // 復帰アドレス調整
-        stmfd   sp!, { r0-r3,r12,lr }
-        stmfd   sp!, { lr }                     // save LR
+        stmfd   sp!, { r0-r4,r12,lr }
+//        stmfd   sp!, { lr }                     // save LR
 
         // 割り込み要因の判定．
 
@@ -55,12 +55,10 @@ asm void osIrqHandler( void )
 
         // get jump vector
         ldr     r1, =osIntrTable
-        ldr     r0, [ r1, r0, LSL #2 ]
+        ldr     r0, [ r1, r4, LSL #2 ]
 
-        adr     lr, irq_return
-        bx      r0      // set return address for thread rescheduling
+        blx     r0      // set return address for thread rescheduling
 
-irq_return
         // End of Interrupt Register
         ldr     lr, =REG_CPUI_EOI_ADDR
         str     r4, [lr]
@@ -70,8 +68,10 @@ irq_return
 #endif // BROM_ENABLE_THREAD
 
 my_undefined_interrupt_1
-        ldmfd   sp!, { lr }
-        ldmfd   sp!, { r0-r3,r12,pc }   // return to interrupted address
+//        ldmfd   sp!, { lr }
+        ldmfd   sp!, { r0-r4,r12,lr }   // return to interrupted address
+        movs	pc, lr
+//        subs	pc, lr, #4
 }
 
 #ifdef BROM_ENABLE_THREAD
@@ -171,8 +171,9 @@ _dont_switched_
         mov     r3, #HW_PSR_IRQ_MODE|HW_PSR_IRQ_DISABLE|HW_PSR_ARM_STATE
         msr     cpsr_c, r3
 
-        ldmfd   sp!, { lr }
-        ldmfd   sp!, { r0-r3,r12,pc }   // return to interrupted address
+        bx      lr
+//        ldmfd   sp!, { lr }
+//        ldmfd   sp!, { r0-r3,r12,pc }   // return to interrupted address
         // not reach here
 
 
diff --git a/trunk/bootrom/build/libraries/os/common/os_tick.c b/trunk/bootrom/build/libraries/os/common/os_tick.c
index 7d37200..24c3fe7 100644
--- a/trunk/bootrom/build/libraries/os/common/os_tick.c
+++ b/trunk/bootrom/build/libraries/os/common/os_tick.c
@@ -94,7 +94,7 @@ void osInitTick(void)
         osEnableInterruptID(OSi_TICK_IE_TIMER_ID);
 
         //---- need to reset
-        i_osNeedResetTimer = FALSE;
+        i_osNeedResetTimer = TRUE;
     }
 }