diff --git a/machine_alpha/machine_alpha.bdf b/machine_alpha/machine_alpha.bdf
index b220884..98ff22d 100644
--- a/machine_alpha/machine_alpha.bdf
+++ b/machine_alpha/machine_alpha.bdf
@@ -5194,11 +5194,6 @@ applicable agreement for further details.
 	(pt 672 352)
 	(color 0 0 0)
 )
-(connector
-	(pt 3544 1480)
-	(pt 3544 240)
-	(color 0 128 0)
-)
 (connector
 	(pt 864 416)
 	(pt 864 240)
@@ -5257,10 +5252,6 @@ applicable agreement for further details.
 	(pt 856 240)
 	(pt 864 240)
 )
-(connector
-	(pt 864 240)
-	(pt 3544 240)
-)
 (connector
 	(pt 800 192)
 	(pt 800 216)
@@ -5647,10 +5638,6 @@ applicable agreement for further details.
 	(pt 784 272)
 	(pt 784 240)
 )
-(connector
-	(pt 640 272)
-	(pt 784 272)
-)
 (connector
 	(pt 3416 1528)
 	(pt 3416 1656)
@@ -6181,6 +6168,19 @@ applicable agreement for further details.
 	(pt 1248 1232)
 	(pt 1104 1232)
 )
+(connector
+	(pt 3544 1480)
+	(pt 3544 272)
+	(color 0 128 0)
+)
+(connector
+	(pt 640 272)
+	(pt 784 272)
+)
+(connector
+	(pt 784 272)
+	(pt 3544 272)
+)
 (junction (pt 2856 1120))
 (junction (pt 2872 1136))
 (junction (pt 2888 1152))
@@ -6236,7 +6236,6 @@ applicable agreement for further details.
 (junction (pt 672 352))
 (junction (pt 1232 352))
 (junction (pt 800 240))
-(junction (pt 864 240))
 (junction (pt 1728 1672))
 (junction (pt 1744 1656))
 (junction (pt 3000 1544))
@@ -6273,6 +6272,7 @@ applicable agreement for further details.
 (junction (pt 3272 768))
 (junction (pt 3288 784))
 (junction (pt 3304 800))
+(junction (pt 784 272))
 (text "from PC" (rect 784 1408 828 1422)(font "Arial" (font_size 8)))
 (text "from general registers" (rect 792 1360 918 1374)(font "Arial" (font_size 8)))
 (text "Ri" (rect 1760 1760 1790 1792)(font "Arial" (color 128 0 128)(font_size 20)))
diff --git a/课设具体内容.md b/课设具体内容.md
index 405bc14..97cbac7 100644
--- a/课设具体内容.md
+++ b/课设具体内容.md
@@ -47,6 +47,8 @@ A3 00H -> X+Y
 
 ## 数据通路
 
+![](https://m.360buyimg.com/babel/jfs/t1/214924/14/18828/45177/62863383Ef4012988/3bad40604c524374.png)
+
 ALU用的是181、182构成的。
 
 做扩展时候，可以借用它的功能。