diff --git a/main.asm b/main.asm
index 7e009bd..7c5eafa 100644
--- a/main.asm
+++ b/main.asm
@@ -70,4 +70,4 @@ main:
 .data zp		; 零页段边界
 .checkpc $80
 .data
-.checkpc $D000	; data段边界
\ No newline at end of file
+.checkpc $0800	; data段边界
\ No newline at end of file