diff --git a/config/memory.scm b/config/memory.scm
index 0688c3f..b8e375a 100644
--- a/config/memory.scm
+++ b/config/memory.scm
@@ -45,9 +45,8 @@
         )
 
         (memory stack
-                (address (#x000200 . #x000FFF))
-                (section (stack #x00200))
-                (section (cstack #x00400))
+                (address (#x000100 . #x007FFF))
+                (section (stack #x00100))
         )
 
         (memory DirectPage
@@ -58,9 +57,7 @@
                 )
         )
 
-        (block cstack (size #x400))               ; C stack size
-
-        (block stack  (size #x200))               ; machine stack size
+        (block stack  (size #x7F00))               ; machine stack size
 
         (block heap  (size #x0001))
 
diff --git a/src/cstartup.s b/src/cstartup.s
index de9d6c0..7361396 100644
--- a/src/cstartup.s
+++ b/src/cstartup.s
@@ -5,7 +5,6 @@
               .rtmodel core, "*"
 
               .section stack
-              .section cstack
               .section heap
               .section data_init_table