diff --git a/Makefile b/Makefile
index 19feb9e..ac98bdd 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,7 @@ registers:
 
 DEFAULT = header.o arm7/arm7.bin.o
 
+2d_engine.elf: $(DEFAULT) arm9/2d_engine.bin.o
 triangle.elf: $(DEFAULT) arm9/triangle.bin.o
 triangle_rotating.elf: $(DEFAULT) arm9/triangle_rotating.bin.o
 texture.elf: $(DEFAULT) arm9/texture.bin.o
diff --git a/arm7/arm7.lds b/arm7/arm7.lds
index 9fe7410..e123193 100644
--- a/arm7/arm7.lds
+++ b/arm7/arm7.lds
@@ -2,47 +2,50 @@ OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 MEMORY
 {
-  ram : ORIGIN = 0x02000000, LENGTH = 4M
+  main_memory : ORIGIN = 0x02390000, LENGTH = 256K
+  arm7_exclusive_internal_work_ram : ORIGIN = 0x03800000, LENGTH = 64K
 }
 SECTIONS
 {
-  . = ORIGIN(ram) + 0x390000;
+  . = ORIGIN(arm7_exclusive_internal_work_ram);
 
   .text ALIGN(4) :
   {
     KEEP(*(.text.start))
     *(.text)
     *(.text.*)
-    *(.glue_7t)
-    *(.glue_7)
-    *(.vfp11_veneer)
-    *(.v4_bx)
-  } > ram
+    . = ALIGN(32);
+  } >arm7_exclusive_internal_work_ram AT>main_memory
 
   .data ALIGN(4) :
   {
     *(.data)
     *(.data.*)
-  } > ram
+  } >arm7_exclusive_internal_work_ram AT>main_memory
 
   .rodata ALIGN(4) :
   {
     *(.rodata)
     *(.rodata.*)
-  } > ram
+  } >arm7_exclusive_internal_work_ram AT>main_memory
 
   .ctors ALIGN(4) :
   {
     KEEP(*(.ctors))
     KEEP(*(.ctors.*))
-  } > ram
+  } >arm7_exclusive_internal_work_ram AT>main_memory
 
   .bss ALIGN(4) (NOLOAD) :
   {
     *(.bss)
     *(.bss.*)
     *(COMMON)
-  } > ram
+  } >arm7_exclusive_internal_work_ram
+
+  /DISCARD/ :
+  {
+    *(.glue_7) *(.glue_7t) *(.vfp11_veneer) *(.v4_bx)
+  }
 
   INCLUDE "../debug.lds"
 }
diff --git a/arm7/start.s b/arm7/start.s
index 62a5724..285e951 100644
--- a/arm7/start.s
+++ b/arm7/start.s
@@ -1,4 +1,26 @@
+        .macro COPY_32_BYTE_ALIGNED
+        cmp r1, r10
+        beq _fill_break.\@
+_fill_loop.\@:
+        ldmia r0!, {r2 - r9}
+        stmia r1!, {r2 - r9}
+        cmp r1, r10
+        bne _fill_loop.\@
+_fill_break.\@:
+        .endm
+
 	.section .text.start
 	.global _start
 _start:
-	b _start
+	// copy .text to internal ram
+        ldr r0, =__text_load_start
+        ldr r1, =__text_link_start
+        ldr r10, =__text_link_end
+	COPY_32_BYTE_ALIGNED
+
+	// jump to internal ram
+	ldr 	r3,=_loop_forever
+	bx	r3
+
+_loop_forever:
+	b 	_loop_forever
diff --git a/arm9/arm9.lds b/arm9/arm9.lds
index e0832c2..918de4f 100644
--- a/arm9/arm9.lds
+++ b/arm9/arm9.lds
@@ -49,3 +49,5 @@ SECTIONS
 
 INCLUDE "../symbols.lds"
 INCLUDE "addresses.lds"
+
+__stack_end = ORIGIN(ram) + LENGTH(ram) - 4;
diff --git a/dump.py b/dump.py
index 9ea65e1..04d87f7 100644
--- a/dump.py
+++ b/dump.py
@@ -58,10 +58,12 @@ for name, offset, size in fields:
             print(f'{b:02x}', end='')
 
     pad = ' ' * (17 * 2 - size * 2)
-    if size == 4:
+    if name in {'game title', 'game code'}:
+        print(pad, buf[offset:offset+size], end='')
+    elif size == 4:
         n, = struct.unpack('<I', buf[offset:offset+size])
         print(pad, f"0x{n:08x}", end='')
-    if size == 2:
+    elif size == 2:
         n, = struct.unpack('<H', buf[offset:offset+size])
         print(pad, f"0x{n:04x}", end='')
     print()
diff --git a/header.s b/header.s
index c155dc2..dd29223 100644
--- a/header.s
+++ b/header.s
@@ -1,7 +1,7 @@
 	.section .text.header
 
 	.ascii "game title  " /* Game Title */
-	.ascii "AAAA"     /* Game Code */
+	.ascii "####"     /* Game Code */
 	.ascii "00"       /* Maker Code */
 	.byte 0x0         /* Unit Code */
 	.byte 0x0         /* Device type */
diff --git a/symbols.lds b/symbols.lds
index d4e530d..045c871 100644
--- a/symbols.lds
+++ b/symbols.lds
@@ -1,5 +1,3 @@
-__stack_end = ORIGIN(ram) + LENGTH(ram) - 4;
-
 __text_link_start = ADDR(.text);
 __text_link_end = ADDR(.text) + SIZEOF(.text);
 __text_load_start = LOADADDR(.text);