diff --git a/src/itoa.s b/src/itoa.s
index 857079b..117bfbc 100644
--- a/src/itoa.s
+++ b/src/itoa.s
@@ -9,11 +9,9 @@
 # ecx - base
 itoa:
     push %bx
+    xor %edx, %edx
     mov $numbers, %bx
 
-.debug:
-    jmp .debug
-
     mov $(itoa_result + ITOA_BUFFER_SIZE - 1), %di
     std
 .div:
diff --git a/src/mbr_test.ld b/src/mbr_test.ld
index 8b8504d..8eb838c 100644
--- a/src/mbr_test.ld
+++ b/src/mbr_test.ld
@@ -5,8 +5,8 @@ MEMORY
 
 SECTIONS
 {
-    RAM = 0x7E00;
-    RAM_SEGMENT = (RAM >> 8);
+    RAM         = 0x7E00;
+    RAM_SEGMENT = 0x7E0;
 
     .text       0x0000 : {
         BOOTLOADER_START = .;