diff --git a/trunk/bootrom/build/bootrom/alarm/ARM11/main.c b/trunk/bootrom/build/bootrom/alarm/ARM11/main.c
index 4683e89..24cee38 100644
--- a/trunk/bootrom/build/bootrom/alarm/ARM11/main.c
+++ b/trunk/bootrom/build/bootrom/alarm/ARM11/main.c
@@ -22,6 +22,10 @@ static void handler(void)
 
 void BromMain( void )
 {
+    osTPrintf( "start mon0 = %08x\n", osGetPerfMonitor( OS_MONITOR_0 ) );
+    osTPrintf( "start mon1 = %08x\n", osGetPerfMonitor( OS_MONITOR_1 ) );
+    osTPrintf( "start mon2 = %08x\n", osGetPerfMonitor( OS_MONITOR_2 ) );
+
     osInitException();
     osInitBROM();
 
@@ -39,18 +43,18 @@ void BromMain( void )
     while (1)
     {
         OSTick tick = osGetTick();
-        u32 mon[OS_MONITOR_NUM];
-        mon[0] = osGetPerfMonitor( OS_MONITOR_0 );
-        mon[1] = osGetPerfMonitor( OS_MONITOR_1 );
-        mon[2] = osGetPerfMonitor( OS_MONITOR_2 );
+        u32 pmon[OS_MONITOR_NUM];
+        pmon[0] = osGetPerfMonitor( OS_MONITOR_0 );
+        pmon[1] = osGetPerfMonitor( OS_MONITOR_1 );
+        pmon[2] = osGetPerfMonitor( OS_MONITOR_2 );
         osWaitInterruptID( TRUE, OSi_ALARM_IE_TIMER_ID );
-        mon[0] = osGetPerfMonitor( OS_MONITOR_0 ) - mon[0];
-        mon[1] = osGetPerfMonitor( OS_MONITOR_1 ) - mon[1];
-        mon[2] = osGetPerfMonitor( OS_MONITOR_2 ) - mon[2];
+        pmon[0] = osGetPerfMonitor( OS_MONITOR_0 ) - pmon[0];
+        pmon[1] = osGetPerfMonitor( OS_MONITOR_1 ) - pmon[1];
+        pmon[2] = osGetPerfMonitor( OS_MONITOR_2 ) - pmon[2];
         tick = osGetTick() - tick;
-        osTPrintf( "wait mon0 = %llu msec\n", OS_TICK_TO_MSEC(mon[0]) ); // MG20ではパフォーマンスモニタのクロックが違う
-        osTPrintf( "wait mon1 = %llu msec\n", OS_TICK_TO_MSEC(mon[1]) );
-        osTPrintf( "wait mon2 = %llu msec\n", OS_TICK_TO_MSEC(mon[2]) );
+        osTPrintf( "wait mon0 = %llu msec\n", OS_TICK_TO_MSEC(pmon[0]) );
+        osTPrintf( "wait mon1 = %llu msec\n", OS_TICK_TO_MSEC(pmon[1]) );
+        osTPrintf( "wait mon2 = %llu msec\n", OS_TICK_TO_MSEC(pmon[2]) );
         osTPrintf( "wait tick = %llu msec\n", OS_TICK_TO_MSEC(tick) );
     }
 }
diff --git a/trunk/bootrom/build/libraries/init/ARM11/crt0.c b/trunk/bootrom/build/libraries/init/ARM11/crt0.c
index e6ffaea..786360a 100644
--- a/trunk/bootrom/build/libraries/init/ARM11/crt0.c
+++ b/trunk/bootrom/build/libraries/init/ARM11/crt0.c
@@ -73,13 +73,13 @@ stupStartHandlerVeneer
 LSYM(1) beq     BSYM(1)
 
         //---- enable performance monitor
+        // カウンタ0/1は乱数の要素として使えるかもしれないのでリセットしない
         mrc     p15, 0, r0, c15, c12, 0
-        ldr     r1, =HW_C15_PMN_ENABLE | HW_C15_CYCLE_COUNT_RESET | HW_C15_COUNT01_RESET | \
+        ldr     r1, =HW_C15_PMN_ENABLE | HW_C15_CYCLE_COUNT_RESET | \
                     (HW_C15_EVT_INC_EACH_CYCLE << HW_C15_COUNT0_EVT_SFT) | \
                     (HW_C15_EVT_INC_EACH_CYCLE << HW_C15_COUNT1_EVT_SFT) | \
                      HW_C15_CYCLE_COUNT_D64
         orr     r0, r0, r1
-//        bic     r0, r0, #HW_C15_CYCLE_COUNT_D64
         mcr     p15, 0, r0, c15, c12, 0
 
         //---- check CPU-ID
@@ -87,14 +87,12 @@ LSYM(1) beq     BSYM(1)
         tst     r2, #HW_C0_AP_CPU_ID_MASK
         beq     core0_start
 
-#ifdef SDK_NE1EMU
         cmp     r2, #1
         beq     core1_start
 LSYM(1)
         wfi
         nop
         b       BSYM(1)
-#endif // SDK_NE1EMU
 
 core1_start
         //----  Wait for IPI
@@ -113,13 +111,15 @@ core1_start
         mov     r1, r1, lsl r2
         mov     r0, #~0
         str     r0, [r3]
+        ldr     lr, =HW_START_VECTOR1_BUF
+
+        // これ以降は0ページプロテクション領域を参照しないこと
 LSYM(10)
         wfi
         nop
         ldr     r0, [r3]
         tst     r0, r1
         beq     BSYM(10)
-        ldr     lr, =HW_START_VECTOR1_BUF
         ldr     lr, [lr]
         bx      lr