diff --git a/ld_script.txt b/ld_script.txt
index 3c1a25094..10abd8810 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -47,6 +47,8 @@ SECTIONS {
     .text :
     ALIGN(4)
     {
+        src/rom_header.o(.text);
+        src/rom_header_gf.o(.text);
         src/crt0.o(.text);
         src/main.o(.text);
         gflib/malloc.o(.text);
@@ -435,6 +437,8 @@ SECTIONS {
     .rodata :
     ALIGN(4)
     {
+        src/rom_header.o(.rodata);
+        src/rom_header_gf.o(.rodata);
         src/main.o(.rodata);
         gflib/bg.o(.rodata);
         gflib/window.o(.rodata);
diff --git a/src/crt0.s b/src/crt0.s
index 672fc94f2..6e3b86a72 100644
--- a/src/crt0.s
+++ b/src/crt0.s
@@ -1,107 +1,7 @@
-#include "constants/global.h"
 	.include "constants/gba_constants.inc"
 
 	.syntax unified
 
-	.global Start
-
-	.text
-
-	.arm
-
-Start: @ 8000000
-	b Init
-
-	.include "asm/rom_header.inc"
-
-@ 80000C0
-	.word 0
-
-	.global GPIOPortData
-GPIOPortData: @ 80000C4
-	.2byte 0
-
-	.global GPIOPortDirection
-GPIOPortDirection: @ 80000C6
-	.2byte 0
-
-	.global GPIOPortReadEnable
-GPIOPortReadEnable: @ 80000C8
-	.2byte 0
-
-@ 80000CA
-	.2byte 0
-
-@ 80000CC
-	.space 0x34
-
-	.4byte GAME_VERSION
-	.4byte GAME_LANGUAGE
-
-	.ascii "pokemon emerald version"
-	.space 9
-
-	.4byte gMonFrontPicTable
-	.4byte gMonBackPicTable
-	.4byte gMonPaletteTable
-	.4byte gMonShinyPaletteTable
-	.4byte gMonIconTable
-	.4byte gMonIconPaletteIndices
-	.4byte gMonIconPaletteTable
-	.4byte gSpeciesNames
-	.4byte gMoveNames
-	.4byte gDecorations
-
-	.4byte 0x00001270 @ offsetof(struct SaveBlock1, flags)
-	.4byte 0x0000139c @ offsetof(struct SaveBlock1, vars)
-	.4byte 0x00000018 @ offsetof(struct SaveBlock2, pokedex)
-	.4byte 0x00000988 @ offsetof(struct SaveBlock1, seen1)
-	.4byte 0x00003b24 @ offsetof(struct SaveBlock1, seen2)
-	.4byte 0x00000046 @ ?
-	.4byte 0x000008e4 @ ?
-	.4byte 0x000008ac @ ?
-	.4byte 0x00000182 @ NATIONAL_DEX_COUNT?
-
-	.byte 0x07, 0x0a, 0x0a, 0x0a, 0x0c, 0x0c, 0x06, 0x0c
-	.byte 0x06, 0x10, 0x12, 0x0c, 0x0f, 0x0b, 0x01, 0x08
-
-	.4byte 0x0000000c @ ?
-	.4byte 0x00000f2c @ sizeof(struct SaveBlock2)
-	.4byte 0x00003d88 @ sizeof(struct SaveBlock1)
-	.4byte 0x00000234 @ offsetof(struct SaveBlock1, playerPartyCount)
-	.4byte 0x00000238 @ offsetof(struct SaveBlock1, playerParty)
-	.4byte 0x00000009 @ offsetof(struct SaveBlock2, specialSaveWarpFlags)
-	.4byte 0x0000000a @ offsetof(struct SaveBlock2, playerTrainerId)
-	.4byte 0x00000000 @ offsetof(struct SaveBlock2, playerName)
-	.4byte 0x00000008 @ offsetof(struct SaveBlock2, playerGender)
-	.4byte 0x00000ca8 @ offsetof(struct SaveBlock2, frontier.challengeStatus)
-	.4byte 0x00000ca8 @ offsetof(struct SaveBlock2, frontier.challengeStatus)
-	.4byte 0x000031c7 @ offsetof(struct SaveBlock1, externalEventFlags)
-	.4byte 0x000031b3 @ offsetof(struct SaveBlock1, externalEventData)
-	.4byte 0x00000000
-
-	.4byte gBaseStats
-	.4byte gAbilityNames
-	.4byte gAbilityDescriptionPointers
-	.4byte gItems
-	.4byte gBattleMoves
-	.4byte gBallSpriteSheets
-	.4byte gBallSpritePalettes
-
-	.4byte 0x000000a8 @ offsetof(struct SaveBlock2, gcnLinkFlags)
-	.4byte 0x00000864 @ ?
-	.4byte 0x0000089b @ ?
-
-	.byte 0x1e, 0x1e, 0x10, 0x40
-
-	.4byte 0x0000322e @ offsetof(struct SaveBlock1, ? part-way into mysteryGift)
-	.4byte 0x00000498 @ offsetof(struct SaveBlock1, pcItems)
-	.4byte 0x000031a8 @ offsetof(struct SaveBlock1, giftRibbons)
-	.4byte 0x000031f8 @ offsetof(struct SaveBlock1, enigmaBerry)
-	.4byte 0x00000034 @ offsetof(struct SaveBlock1, mapView)
-	.4byte 0x00000000
-	.4byte 0x00000000
-
 	.arm
 	.align 2, 0
 	.global Init
diff --git a/asm/rom_header.inc b/src/rom_header.s
similarity index 73%
rename from asm/rom_header.inc
rename to src/rom_header.s
index 6730efae2..596fd379f 100644
--- a/asm/rom_header.inc
+++ b/src/rom_header.s
@@ -1,3 +1,10 @@
+@ Note: ROM header data is empty space here.
+@       It's populated by gbafix using data provided in the Makefile. 
+
+	.global Start
+Start: @ 8000000
+	b Init
+
 	.global RomHeaderNintendoLogo
 RomHeaderNintendoLogo:
 	.space 156
diff --git a/src/rom_header_gf.s b/src/rom_header_gf.s
new file mode 100644
index 000000000..b021158f5
--- /dev/null
+++ b/src/rom_header_gf.s
@@ -0,0 +1,89 @@
+#include "constants/global.h"
+
+@ 80000C0
+    .word 0
+
+    .global GPIOPortData
+GPIOPortData: @ 80000C4
+    .2byte 0
+
+    .global GPIOPortDirection
+GPIOPortDirection: @ 80000C6
+    .2byte 0
+
+    .global GPIOPortReadEnable
+GPIOPortReadEnable: @ 80000C8
+    .2byte 0
+
+@ 80000CA
+    .2byte 0
+
+@ 80000CC
+    .space 0x34
+
+    .4byte GAME_VERSION
+    .4byte GAME_LANGUAGE
+
+    .ascii "pokemon emerald version"
+    .space 9
+
+    .4byte gMonFrontPicTable
+    .4byte gMonBackPicTable
+    .4byte gMonPaletteTable
+    .4byte gMonShinyPaletteTable
+    .4byte gMonIconTable
+    .4byte gMonIconPaletteIndices
+    .4byte gMonIconPaletteTable
+    .4byte gSpeciesNames
+    .4byte gMoveNames
+    .4byte gDecorations
+
+    .4byte 0x00001270 @ offsetof(struct SaveBlock1, flags)
+    .4byte 0x0000139c @ offsetof(struct SaveBlock1, vars)
+    .4byte 0x00000018 @ offsetof(struct SaveBlock2, pokedex)
+    .4byte 0x00000988 @ offsetof(struct SaveBlock1, seen1)
+    .4byte 0x00003b24 @ offsetof(struct SaveBlock1, seen2)
+    .4byte 0x00000046 @ ?
+    .4byte 0x000008e4 @ ?
+    .4byte 0x000008ac @ ?
+    .4byte 0x00000182 @ NATIONAL_DEX_COUNT?
+
+    .byte 0x07, 0x0a, 0x0a, 0x0a, 0x0c, 0x0c, 0x06, 0x0c
+    .byte 0x06, 0x10, 0x12, 0x0c, 0x0f, 0x0b, 0x01, 0x08
+
+    .4byte 0x0000000c @ ?
+    .4byte 0x00000f2c @ sizeof(struct SaveBlock2)
+    .4byte 0x00003d88 @ sizeof(struct SaveBlock1)
+    .4byte 0x00000234 @ offsetof(struct SaveBlock1, playerPartyCount)
+    .4byte 0x00000238 @ offsetof(struct SaveBlock1, playerParty)
+    .4byte 0x00000009 @ offsetof(struct SaveBlock2, specialSaveWarpFlags)
+    .4byte 0x0000000a @ offsetof(struct SaveBlock2, playerTrainerId)
+    .4byte 0x00000000 @ offsetof(struct SaveBlock2, playerName)
+    .4byte 0x00000008 @ offsetof(struct SaveBlock2, playerGender)
+    .4byte 0x00000ca8 @ offsetof(struct SaveBlock2, frontier.challengeStatus)
+    .4byte 0x00000ca8 @ offsetof(struct SaveBlock2, frontier.challengeStatus)
+    .4byte 0x000031c7 @ offsetof(struct SaveBlock1, externalEventFlags)
+    .4byte 0x000031b3 @ offsetof(struct SaveBlock1, externalEventData)
+    .4byte 0x00000000
+
+    .4byte gBaseStats
+    .4byte gAbilityNames
+    .4byte gAbilityDescriptionPointers
+    .4byte gItems
+    .4byte gBattleMoves
+    .4byte gBallSpriteSheets
+    .4byte gBallSpritePalettes
+
+    .4byte 0x000000a8 @ offsetof(struct SaveBlock2, gcnLinkFlags)
+    .4byte 0x00000864 @ ?
+    .4byte 0x0000089b @ ?
+
+    .byte 0x1e, 0x1e, 0x10, 0x40
+
+    .4byte 0x0000322e @ offsetof(struct SaveBlock1, ? part-way into mysteryGift)
+    .4byte 0x00000498 @ offsetof(struct SaveBlock1, pcItems)
+    .4byte 0x000031a8 @ offsetof(struct SaveBlock1, giftRibbons)
+    .4byte 0x000031f8 @ offsetof(struct SaveBlock1, enigmaBerry)
+    .4byte 0x00000034 @ offsetof(struct SaveBlock1, mapView)
+    .4byte 0x00000000
+    .4byte 0x00000000