diff --git a/linker-files/linker.scm b/linker-files/linker.scm
index 8e7a438..6567025 100644
--- a/linker-files/linker.scm
+++ b/linker-files/linker.scm
@@ -1,5 +1,6 @@
 (define memories
-  '((memory zeroPage (address (#x72 . #xdf)) (type ram) ;;; Should be starting at 0x56, ending at 0xff, but experiments in the monitor have shown doc is not to be trusted
+;;;  '((memory zeroPage (address (#x72 . #xdf)) (type ram) ;;; Should be starting at 0x56, ending at 0xff, but experiments in the monitor have shown doc is not to be trusted
+     '((memory zeroPage (address (#x56 . #xff)) (type ram) ;;; Should be starting at 0x56, ending at 0xff, but experiments in the monitor have shown doc is not to be trusted
 		(section registers zpage zzpage))
 	(memory firstPage (address (#x100 . #x1ff)) (section stack))
     (memory reserved (address (#x200 . #x7ff)) (type ram))
diff --git a/src/main.c b/src/main.c
index 6b4874b..44d46b0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -11,7 +11,11 @@
 #include "game_graphics.h"
 #include "monitor_subroutines.h"
 
+// External initialization requirements
 #pragma require __preserve_zp
+//#pragma require __call_heap_initialize
+#pragma require __data_initialization_needed
+
 // Make sure the loading screen is included
 #pragma require __loading_screen