diff --git a/disk.bin b/disk.bin
new file mode 100644
index 0000000..2794e41
Binary files /dev/null and b/disk.bin differ
diff --git a/source/display.d b/source/display.d
index bc7d007..69fdf1c 100644
--- a/source/display.d
+++ b/source/display.d
@@ -41,7 +41,8 @@ class Display {
 		}
 
 		window = SDL_CreateWindow(
-			toStringz("YETI-16"), 0, 0, 640, 400, SDL_WINDOW_RESIZABLE
+			toStringz("YETI-16"), SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+			640, 400, SDL_WINDOW_RESIZABLE
 		);
 
 		if (window is null) {
diff --git a/test.asm b/test.asm
new file mode 100644
index 0000000..110cdc7
--- /dev/null
+++ b/test.asm
@@ -0,0 +1,11 @@
+lda bs 0x100000
+lda ds 1029
+set a 0
+set c 3200
+setl a
+lda ds 1029
+set a 65
+wrb ds a
+
+end:
+	jmpb end