diff --git a/lab1_v2.S b/lab1_v2.S
index 8d1d386..dff10b9 100644
--- a/lab1_v2.S
+++ b/lab1_v2.S
@@ -17,12 +17,6 @@
 lab1_v2:
     push.n {lr}
 
-    mov r0, #2073
-    bl int_to_str
-
-    ldr r0, =2473005196
-    bl int_to_str
-
     bl calculate_formula_v2
     bl int_to_str
 
diff --git a/start.S b/start.S
index 2bf26a8..c1e853a 100644
--- a/start.S
+++ b/start.S
@@ -53,6 +53,25 @@ bootload_v2:
 
     ldr.n r3, =__ram_start
     add r3, r3, #1
+
+    push {r3}
+    blx r3
+    pop {r3}
+
+    @ patch A
+    ldr r0, =0x707ff64d @ 0xDF7F
+    str r0, [r3, #0xb]
+
+    push {r3}
+    blx r3
+    pop {r3}
+
+    @ patch A and B
+    ldr r0, =0x000af240 @ 0x000A
+    str r0, [r3, #0xb]
+    ldr r0, =0x010af240 @ 0x000A
+    str r0, [r3, #0xf]
+
     blx r3
 
     pop {pc}