diff --git a/include/arm11/atp.h b/include/arm11/atp.h
index 27caa2b..ce53093 100644
--- a/include/arm11/atp.h
+++ b/include/arm11/atp.h
@@ -73,6 +73,7 @@ typedef atp_error_t (*atp_itemprovider_t)(
 
 typedef atp_pageopt_t (*atp_keyhandler_t)(
     INPUT(atp_callerdata_t)     some_data_provided_by_caller,
+    INPUT(atp_counter_t)        index_of_selected_item,
     INPUT(atp_boolean_t)        is_x_key_down,
     INPUT(atp_boolean_t)        is_y_key_down,
     INPUT(atp_boolean_t)        is_l_key_down,
diff --git a/source/arm11/atp.c b/source/arm11/atp.c
index 346a3b9..2502e4b 100644
--- a/source/arm11/atp.c
+++ b/source/arm11/atp.c
@@ -294,7 +294,7 @@ atp_error_t atp_select( atp_text_t title, atp_counter_t cnt, atp_itemprovider_t
         {
             if( handler == NULL ) continue;
 
-            atp_pageopt_t opt = handler( data, key&KEY_X, key&KEY_Y, key&KEY_L, key&KEY_R, key&KEY_START, key&KEY_SELECT );
+            atp_pageopt_t opt = handler( data, item_sel, key&KEY_X, key&KEY_Y, key&KEY_L, key&KEY_R, key&KEY_START, key&KEY_SELECT );
             switch( opt )
             {
                 case ATP_PAGE_REFRESH:
diff --git a/source/arm11/filebrowser.c b/source/arm11/filebrowser.c
index 876d775..992d09b 100644
--- a/source/arm11/filebrowser.c
+++ b/source/arm11/filebrowser.c
@@ -195,7 +195,7 @@ static void help_page( atp_text_t *wording, atp_counter_t length )
 
 extern void oaf_config_page();
 
-static atp_pageopt_t serve_on_key( atp_callerdata_t data, atp_boolean_t x, atp_boolean_t y, atp_boolean_t l, atp_boolean_t r, atp_boolean_t start, atp_boolean_t select )
+static atp_pageopt_t serve_on_key( atp_callerdata_t data, atp_counter_t, atp_boolean_t x, atp_boolean_t y, atp_boolean_t l, atp_boolean_t r, atp_boolean_t start, atp_boolean_t select )
 {
 	if( start )
 	{
diff --git a/source/arm11/open_agb_firm.c b/source/arm11/open_agb_firm.c
index 5c16e9e..ffaf1d1 100644
--- a/source/arm11/open_agb_firm.c
+++ b/source/arm11/open_agb_firm.c
@@ -119,15 +119,20 @@ static KHandle g_frameReadyEvent = 0;
 // --------------------------
 //  code for oaf config page
 // --------------------------
+#define LIGHT_MIN (MCU_getSystemModel() > 3 ? 16 : 20)
+#define LIGHT_MAX (MCU_getSystemModel() > 3 ? 142 : 117)
 static atp_error_t config_item( atp_callerdata_t data, atp_counter_t index, atp_itemcfg_t *cfg )
 {
 	const char *scaler_val[] = {"上屏无缩放", "上屏GPU放大", "上屏DMA放大", "下屏无缩放"};
 	static char buf[16];
+	cfg->extra_text_color = ATP_COLOR_GREEN;
 	if( index == 0 )
 	{
 		ee_snprintf(buf, sizeof(buf), "%d", g_oafConfig.backlight);
 		cfg->text = "屏幕亮度";
 		cfg->extra_text = buf;
+		if( g_oafConfig.backlight == LIGHT_MIN || g_oafConfig == LIGHT_MAX )
+			cfg->extra_text_color = ATP_COLOR_RED;
 	}
 	else if( index == 1 )
 	{
@@ -145,13 +150,34 @@ static atp_error_t config_item( atp_callerdata_t data, atp_counter_t index, atp_
 		cfg->extra_text = g_oafConfig.saveOverride ? "禁用" : "启用";
 	}
 	cfg->value = index;
-	cfg->extra_text_color = ATP_COLOR_GREEN;
 	return ATP_SUCCESS;
 }
 
+static atp_pageopt_t config_adjust( atp_callerdata_t data, atp_counter_t index, atp_boolean_t x, atp_boolean_t y, atp_boolean_t l, atp_boolean_t r, atp_boolean_t start, atp_boolean_t select )
+{
+	if( index == 0 )
+	{
+		u8 light = g_oafConfig.brightness;
+		if( l ) 
+		{
+			light -= 10;
+			if( light % 10 ) light = light + (10-light%10);
+		}
+		else if( r ) 
+		{
+			light += 10;
+			if( light % 10 ) light = light - light % 10;
+		}
+		if( light > LIGHT_MAX ) light = LIGHT_MAX;
+		else if( light < LIGHT_MIN ) light = LIGHT_MIN;
+		g_oafConfig.brightness = light;
+	}
+	return ATP_PAGE_UPDATE;
+}
+
 void oaf_config_page()
 {
-	atp_select( "参数配置", 4, config_item, NULL, NULL, 0, 0, NULL );
+	atp_select( "参数配置", 4, config_item, config_adjust, NULL, 0, 0, NULL );
 }
 
 static u32 fixRomPadding(u32 romFileSize)