diff --git a/build/systemMenu_RED/NandInitializerRed/ARM7.TWL/src/kami_pxi.c b/build/systemMenu_RED/NandInitializerRed/ARM7.TWL/src/kami_pxi.c
index 82d205cb..d8481094 100644
--- a/build/systemMenu_RED/NandInitializerRed/ARM7.TWL/src/kami_pxi.c
+++ b/build/systemMenu_RED/NandInitializerRed/ARM7.TWL/src/kami_pxi.c
@@ -131,6 +131,7 @@ static void KamiPxiCallback(PXIFifoTag tag, u32 data, BOOL err)
 		case KAMI_NAND_IO:
 		case KAMI_NVRAM_IO:
 		case KAMI_MCU_IO:
+		case KAMI_ARM7_IO:
 		case KAMI_CDC_GO_DSMODE:
 		case KAMI_CLEAR_NAND_ERRORLOG:
             if (!OS_SendMessage(&kamiWork.msgQ, NULL, OS_MESSAGE_NOBLOCK))
@@ -272,6 +273,30 @@ static void KamiThread(void *arg)
 			}
 			break;
 
+		case KAMI_ARM7_IO:
+			{
+				BOOL is_read;
+				u32  addr;
+				u32  write;
+				u32  read;
+
+				is_read = (BOOL)kamiWork.data[0];
+				KAMI_UNPACK_U32(&addr,  &kamiWork.data[1]);
+				KAMI_UNPACK_U32(&write, &kamiWork.data[5]);
+
+				if (is_read)
+				{
+					read = *(u32 *)addr;
+	            	KamiReturnResultEx(kamiWork.command, KAMI_PXI_RESULT_SUCCESS,  sizeof(u32), (u8*)&read );
+				}
+				else
+				{
+					*(u32 *)addr = write;
+					KamiReturnResult(kamiWork.command, KAMI_PXI_RESULT_SUCCESS);
+				}
+			}
+			break;
+
 		case KAMI_CDC_GO_DSMODE:
 			{
 				CDC_GoDsMode();
diff --git a/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/include/kami_pxi.h b/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/include/kami_pxi.h
index 73d26325..eb0ad6a6 100644
--- a/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/include/kami_pxi.h
+++ b/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/include/kami_pxi.h
@@ -62,6 +62,7 @@ KAMIResult ExeFormatAsync(FormatMode format_mode, KAMICallback callback);
 KAMIResult kamiNandIo(u32 block, void* buffer, u32 count, BOOL is_read);
 KAMIResult kamiNvramIo(u32 address, void* buffer, u32 size, BOOL is_read);
 KAMIResult kamiMcuIo(u32 reg_no, void* buffer, u32 value, BOOL is_read);
+KAMIResult kamiARM7Io(u32 addr, u32* buffer, u32 value, BOOL is_read);
 KAMIResult kamiCDC_GoDsMode( void );
 KAMIResult kamiClearNandErrorLog( void );
 
@@ -92,6 +93,14 @@ static KAMIResult kamiMcuWrite(u8 reg_no, u8 value)
 {
 	return kamiMcuIo((u32)reg_no, NULL, (u32)value, FALSE);
 }
+static KAMIResult kamiARM7Read(u32 addr, void* buffer)
+{
+	return kamiARM7Io(addr, buffer, 0, TRUE);
+}
+static KAMIResult kamiARM7Write(u32 addr, u8 value)
+{
+	return kamiARM7Io(addr, NULL, value, FALSE);
+}
 
 /*===========================================================================*/
 
diff --git a/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/src/kami_pxi.c b/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/src/kami_pxi.c
index bf83c127..929880dd 100644
--- a/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/src/kami_pxi.c
+++ b/build/systemMenu_RED/NandInitializerRed/ARM9.TWL/src/kami_pxi.c
@@ -273,6 +273,61 @@ KAMIResult kamiMcuIo(u32 reg_no, void* buffer, u32 value, BOOL is_read)
     return KAMI_RESULT_SEND_ERROR;
 }
 
+
+/*---------------------------------------------------------------------------*
+  Name:         ARM7アクセス関数
+
+  Description:  
+
+  Arguments:    None.
+
+  Returns:      
+ *---------------------------------------------------------------------------*/
+
+KAMIResult kamiARM7Io(u32 addr, u32* buffer, u32 value, BOOL is_read)
+{
+    OSIntrMode enabled;
+    u8  data[12];
+	int i;
+
+	// ロック
+    enabled = OS_DisableInterrupts();
+    if (kamiWork.lock)
+    {
+        (void)OS_RestoreInterrupts(enabled);
+        return KAMI_RESULT_BUSY;
+    }
+    kamiWork.lock = TRUE;
+    (void)OS_RestoreInterrupts(enabled);
+
+    kamiWork.callback = NULL;
+    kamiWork.arg = 0;
+	if (is_read)
+	{
+		kamiWork.data = (u8*)buffer;
+	}
+	else
+	{
+	    kamiWork.data = 0;
+	}
+
+	// データ作成
+	KAMI_PACK_U32(&data[0], &addr);
+	KAMI_PACK_U32(&data[4], &value);
+
+    if (KamiSendPxiCommand(KAMI_ARM7_IO, 12, (u8)is_read))
+    {
+	    for (i = 0; i < 12; i+=3) 
+		{
+	        KamiSendPxiData(&data[i]);
+		}
+	    KamiWaitBusy();
+	    return (KAMIResult)kamiWork.result;
+    }
+
+    return KAMI_RESULT_SEND_ERROR;
+}
+
 /*---------------------------------------------------------------------------*
   Name:         kamiCDC_GoDsMode
 
diff --git a/build/systemMenu_RED/NandInitializerRed/common/include/fifo.h b/build/systemMenu_RED/NandInitializerRed/common/include/fifo.h
index 4e616355..8bb2f503 100644
--- a/build/systemMenu_RED/NandInitializerRed/common/include/fifo.h
+++ b/build/systemMenu_RED/NandInitializerRed/common/include/fifo.h
@@ -64,6 +64,7 @@ typedef enum KamiCommand
     KAMI_NAND_IO,
     KAMI_NVRAM_IO,
     KAMI_MCU_IO,
+    KAMI_ARM7_IO,
     KAMI_CDC_GO_DSMODE,
     KAMI_CLEAR_NAND_ERRORLOG    
 }