diff --git a/include/actor_types.h b/include/actor_types.h
index 4b8c11436..450befb6a 100644
--- a/include/actor_types.h
+++ b/include/actor_types.h
@@ -1,3 +1,6 @@
+#ifndef ACTOR_TYPES_H
+#define ACTOR_TYPES_H
+
 #include <ultra64.h>
 #include <macros.h>
 #include <common_structs.h>
@@ -320,3 +323,5 @@ struct BananaActor {
     /* 0x24 */ Vec3f velocity;
     /* 0x30 */ UnkActorInner unk30;
 }; // size = 0x70
+
+#endif
diff --git a/include/functions.h b/include/functions.h
index f4558e4e2..6ad785b6e 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -3,13 +3,11 @@
 
 #include "common_structs.h"
 
-s32 random_int(u16);
 void mio0decode(u8* arg0, u8* arg1);
 
 void func_8000F2DC(void);
 void func_8000F628(void);
 void func_8000EEDC(void);
-f32 func_802AE1C0(f32 arg0, f32 arg1, f32 arg2);
 void func_802B6540(f32* arg0, f32 arg1, f32 arg2, f32 arg3, s16 arg4);
 void func_80295BF8(s32 arg0);
 void func_8005D6C0(Player* player);
diff --git a/src/code_80027D00.c b/src/code_80027D00.c
index fe83b7d34..81f1e7ff3 100644
--- a/src/code_80027D00.c
+++ b/src/code_80027D00.c
@@ -3,6 +3,7 @@
 #include <defines.h>
 #include "variables.h"
 #include "kart_attributes.h"
+#include "memory.h"
 #include "code_80027D00.h"
 #include "code_8008C1D0.h"
 
diff --git a/src/code_800393C0.c b/src/code_800393C0.c
index 6dace5ab7..50d7f696a 100644
--- a/src/code_800393C0.c
+++ b/src/code_800393C0.c
@@ -1,6 +1,7 @@
 #include "global.h"
 #include <defines.h>
 #include "kart_attributes.h"
+#include "memory.h"
 
 extern s16 D_80165560[];
 extern s32* D_800E3C50[];
diff --git a/src/code_80280000.c b/src/code_80280000.c
index 0177e8b85..e83c26a6d 100644
--- a/src/code_80280000.c
+++ b/src/code_80280000.c
@@ -27,7 +27,6 @@ extern s32 D_802874A0;
 extern u16 atan2s(f32, f32);
 extern u16 D_80164714, D_80164716, D_80164718;
 extern u16 D_800DC5E4;
-extern u32 D_800DC524;
 extern u32 D_800DC50C;
 extern u32 D_802874FC;
 
diff --git a/src/code_80281C40.c b/src/code_80281C40.c
index efae661e2..a899f9844 100644
--- a/src/code_80281C40.c
+++ b/src/code_80281C40.c
@@ -18,7 +18,6 @@ extern s32 D_802874FC;
 extern u32 gMenuSelectionFromEndingSequence;
 extern s32 D_80287554;
 extern u16 gIsInQuitToMenuTransition;
-extern u32 D_800DC524;
 extern Gfx D_00284F70[];
 extern Gfx D_00284EE0[];
 
diff --git a/src/code_80296A50.c b/src/code_80296A50.c
index bd5a399fd..5ceb4fb97 100644
--- a/src/code_80296A50.c
+++ b/src/code_80296A50.c
@@ -6,43 +6,10 @@
 #include <actor_types.h>
 #include <defines.h>
 #include <PR/gbi.h>
-
-f32 sins(u16);                             /* extern */
-f32 coss(u16);                             /* extern */
-void func_800C99E0(Vec3f, s32); // audio external
-f32 func_802B80D0(Vec3f, Vec3f, u16, f32, f32, f32); // extern 
-void func_800C98B8(Vec3f, Vec3f, u32); // extern
-void func_8029794C(Vec3f, Vec3s, f32);
-s32 func_802B4FF8(Mat4, s32);
-
-void func_802B5F74(Mat4, Vec3f, Vec3s);
-void func_802B5F00(Mat4, f32);
-
-void mtxf_translate(Mat4, Vec3f);                          /* extern */
-void vec3s_set(Vec3s, s16, s16, s16);
-void vec3f_set(Vec3f, f32, f32, f32);
-s16 func_8029EC88(Vec3f, Vec3s, Vec3f, s16);
-
-extern Player gPlayers[];
-extern Player *gPlayerOne;
-extern struct Controller gControllers[];
-
-extern s32 gActiveScreenMode;
-
-extern Camera *camera1;
-extern struct Actor gActorList[];
-extern Gfx *gDisplayListHead;
-extern s32 gModeSelection;
-extern s16 gCurrentCourseId;     
-extern f32 D_80150130[];
-extern u16 D_801637B8[];
-extern Lights1 D_800DC610[];
-
-extern f32 gCourseDirection;
-
-extern uintptr_t gSegmentTable[];
-
-extern s8 D_0D004E38[];
+#include "math_util.h"
+#include "memory.h"
+#include "code_802B0210.h"
+#include "code_80296A50.h"
 
 s32 D_802BA050;
 s32 D_802BA054;
@@ -212,7 +179,7 @@ loop_34:
 #else
 GLOBAL_ASM("asm/non_matchings/code_actors/func_80296A50.s")
 #endif
-void func_802ADDC8(UnkActorInner*, f32, f32, f32, f32);
+
 #ifdef MIPS_TO_C
 //generated by m2c commit 685418adfeb3794409e47b45ac5cab60b17d23fd
 ? func_80296A50(struct Actor *);                    /* extern */
@@ -439,18 +406,6 @@ void func_802972B8(Camera *arg0, struct Actor *arg1) {
     }
 }
 
-extern s8 D_0D001C20[];
-extern s8 D_0D001C88[];
-extern s8 D_0D001B90[];
-extern s8 D_0D001BD8[];
-extern s32 D_800DC50C;
-extern Vec3f D_8015F8D0;
-extern s32 D_801625EC;
-extern s32 D_801625F0;
-extern s32 D_801625F4;
-
-extern u16 D_800DC5BC;
-
 void func_80297340(Camera *arg0) {
     Mat4 sp38;
     s16 temp = D_8015F8D0[2];
@@ -518,8 +473,6 @@ void func_802976D8(Vec3s arg0) {
     arg0[2] = 0;
 }
 
-s16 atan2s(f32, f32); // extern
-
 void func_802976EC(UnkActorInner *arg0, Vec3s arg1) {
     f32 x, y, z;
 
@@ -538,8 +491,6 @@ void func_802976EC(UnkActorInner *arg0, Vec3s arg1) {
     arg1[2] = atan2s(x, y);
 }
 
-f32 func_802ABE30(f32, f32, f32, u16); // extern
-
 void func_80297760(struct Actor *arg0, Vec3f arg1) {
     arg1[0] = arg0->pos[0];
     arg1[1] = arg0->pos[1];
@@ -579,9 +530,7 @@ void func_80297818(void) {
     }
 }
 
-UNUSED func_80297944(void) {};
-
-extern Gfx D_0D007B20[];
+UNUSED void func_80297944(void) {};
 
 void func_8029794C(Vec3f arg0, Vec3s arg1, f32 arg2) {
     Mat4 sp20;
@@ -596,8 +545,6 @@ void func_8029794C(Vec3f arg0, Vec3s arg1, f32 arg2) {
     }
 }
 
-void func_802976EC(UnkActorInner*, Vec3s);
-
 void func_802979F8(struct Actor *arg0, f32 arg1) {
     Vec3f sp24;
     Vec3s sp1C;
@@ -610,13 +557,6 @@ void func_802979F8(struct Actor *arg0, f32 arg1) {
     }
 }
 
-extern s8 D_06013C00[];
-extern s8 D_06013CA0[];
-extern s8 D_06013D20[];
-extern s8 D_06013DA0[];
-extern s8 D_06013E20[];
-extern f32 D_802B95F8;
-
 #ifdef MISSING_RODATA // jpt_802B95FC
 
 void func_80297A50(Camera *camera, Mat4 arg1, struct Actor *arg2) {
@@ -652,8 +592,6 @@ void func_80297A50(Camera *camera, Mat4 arg1, struct Actor *arg2) {
 #endif
 GLOBAL_ASM("asm/non_matchings/code_actors/func_80297A50.s")
 
-extern f64 D_802B9610;
-
 void update_obj_yoshi_valley_egg(struct YoshiValleyEgg *egg) {
     egg->pathRot += 0x5B;
     egg->pos[0] = egg->pathCenter[0] + (sins(egg->pathRot) * egg->pathRadius);
@@ -916,8 +854,6 @@ void update_obj_paddle_wheel(struct PaddleWheelBoat *boat) {
     boat->wheelRot += 0x38E;
 }
 
-extern void func_800C9D80(Vec3f *arg0, Vec3f *arg1, u32 arg2); // extern
-
 // wheels
 void update_obj_train_engine(struct TrainCar *arg0) {
     arg0->wheelRot -= 0x666;
@@ -983,11 +919,6 @@ void update_obj_piranha_plant(struct PiranhaPlant *arg0) {
     }
 }
 
-extern s8 D_06006990[];
-extern s8 D_0600D850[];
-extern f32 D_802B9624;
-extern f32 D_802B9628;
-extern s32 D_802BA058;
 // Mario Raceway Load piranha plant textures?
 void func_80298328(Camera *arg0, Mat4 arg1, struct PiranhaPlant *arg2) {
     s32 pad;
@@ -1258,11 +1189,6 @@ block_17:
 GLOBAL_ASM("asm/non_matchings/code_actors/func_802986B4.s")
 #endif
 
-void func_800C9060(Player*, s32);                            /* extern */
-void func_800C90F4(Player*, s32);                          /* extern */
-s32 func_8029EEB8(Player*, Vec3f, f32, f32, f32);          /* extern */
-extern s8 D_06013F78[];
-extern f32 D_802B964C; // 0.8f
 //static f32 D_802B964C = 0.8f;
 #ifdef RO_DATA // Needs D_802B964C imported to match
 void func_80298AC0(Player *player) {
@@ -1477,13 +1403,6 @@ block_29:
 GLOBAL_ASM("asm/non_matchings/code_actors/func_80298D7C.s")
 #endif
 
-extern Gfx D_06006A68[];
-extern Gfx D_0D004C68[];
-
-extern f32 D_802B9658; // = 16000000.0; // static
-extern f32 D_802B965C; // = 250000.0f; // static
-extern f32 D_802B96B4;
-
 void func_80299144(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1506,9 +1425,6 @@ void func_80299144(Camera *camera, Mat4 arg1, struct Actor *arg2) {
         gSPDisplayList(gDisplayListHead++, D_06006A68);
     }
 }
-extern f32 D_802B9660;
-extern f32 D_802B9664;
-extern Gfx D_06015B48[];
 
 void func_8029930C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
@@ -1533,10 +1449,6 @@ void func_8029930C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B9668;
-extern f32 D_802B966C;
-extern Gfx D_0600D4A0[];
-
 void func_802994D4(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1560,9 +1472,6 @@ void func_802994D4(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B9670;
-extern Gfx D_06013F20[];
-
 void func_8029969C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1586,10 +1495,6 @@ void func_8029969C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B9674;
-extern f32 D_802B9678;
-extern Gfx D_0600FC70[];
-
 void func_80299864(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1613,10 +1518,6 @@ void func_80299864(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B967C;
-extern f32 D_802B9680;
-extern Gfx D_0600D578[];
-
 void func_80299A2C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1640,10 +1541,6 @@ void func_80299A2C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B9684;
-extern f32 D_802B9688;
-extern Gfx D_060090C8[];
-
 void func_80299BF4(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1667,9 +1564,6 @@ void func_80299BF4(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B968C;
-extern f32 D_802B9690;
-extern Gfx D_060075A0[];
 void func_80299DBC(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1692,10 +1586,6 @@ void func_80299DBC(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B9694;
-extern f32 D_802B9698;
-extern Gfx D_06008528[];
-
 void func_80299EDC(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1718,10 +1608,6 @@ void func_80299EDC(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B969C;
-extern f32 D_802B96A0;
-extern Gfx D_06008628[];
-
 void func_80299FFC(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1744,10 +1630,6 @@ void func_80299FFC(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern f32 D_802B96A4;
-extern f32 D_802B96A8;
-extern Gfx D_06008728[];
-
 void func_8029A11C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     f32 temp_f0;
     s16 temp_v0 = arg2->flags;
@@ -1770,8 +1652,6 @@ void func_8029A11C(Camera *camera, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-extern Gfx D_06013BB8[];
-
 void func_8029A23C(Camera *camera, Mat4 arg1, struct Actor *actor) {
     uintptr_t addr;
 
@@ -1790,11 +1670,6 @@ void func_8029A23C(Camera *camera, Mat4 arg1, struct Actor *actor) {
     gSPDisplayList(gDisplayListHead++, D_06013BB8);
 }
 
-extern Gfx D_0D005338[];
-extern Gfx D_0D005368[];
-extern f32 D_802B96AC; // static = 490000.0f;
-extern f32 D_802B96B0; // static = 40000.0f;
-
 void func_8029A3AC(Camera *camera, Mat4 arg1, struct ShellActor *shell) {
     s16 pad;
     u16 temp_t8;
@@ -1871,12 +1746,6 @@ void func_8029A828(Camera *arg0, Mat4 arg1, struct ShellActor *arg2) {
     func_8029A3AC(arg0, arg1, arg2);
 }
 
-extern s8 D_0D004B48[];
-extern s8 D_0D004BD8[];
-extern f32 D_802B96B4;
-extern s16 D_8015F6EE;
-extern s16 D_8015F6EC;
-
 void func_8029A8F4(Camera *arg0, Mat4 arg1, struct BananaActor *arg2) {
     s32 pad[3];
     Vec3s sp7C;
@@ -2027,17 +1896,6 @@ void func_8029AC18(Camera *camera, Mat4 arg1, struct Actor *arg2) {
 GLOBAL_ASM("asm/non_matchings/code_actors/func_8029AC18.s")
 #endif
 
-void mtxf_translate(Mat4, Vec3f); // extern
-void func_802B59DC(Mat4, s32); // extern
-void func_802B71CC(Mat4, Mat4, Mat4); // extern
-void vec3f_set(Vec3f, f32, f32, f32); // extern
-extern s8 D_0600E058[];
-extern s8 D_0600E730[];
-extern s8 D_0600FC28[];
-extern s8 D_800DC628[];
-extern s8 D_800DC630[];
-extern f32 D_802B96DC;
-
 void func_8029AE1C(Camera *arg0, struct PaddleWheelBoat *boat, Mat4 arg2, u16 arg3) {
     s32 pad[3];
     Vec3f sp120;
@@ -2073,18 +1931,6 @@ void func_8029AE1C(Camera *arg0, struct PaddleWheelBoat *boat, Mat4 arg2, u16 ar
         }
 }
 
-extern s8 D_06023858[];
-extern s8 D_060238A0[];
-extern s8 D_060238E8[];
-extern f32 D_802B96E0;
-extern f32 D_802B96E4;
-extern f32 D_802B96E8;
-extern f32 D_802B96EC;
-
-extern s8 toads_turnpike_dl_0[];
-extern s8 toads_turnpike_dl_1[];
-extern s8 toads_turnpike_dl_2[];
-
 void func_8029B06C(Camera *arg0, struct Actor *arg1) {
     s32 pad[6];
     Mat4 spD8;
@@ -2126,16 +1972,6 @@ void func_8029B06C(Camera *arg0, struct Actor *arg1) {
         }
 }
 
-extern f32 D_802B96F0;
-extern f32 D_802B96F4;
-extern f32 D_802B96F8;
-extern f32 D_802B96FC;
-
-
-extern s8 toads_turnpike_dl_3[];
-extern s8 toads_turnpike_dl_4[];
-extern s8 toads_turnpike_dl_5[];
-
 void func_8029B2E4(Camera *arg0, struct Actor *arg1) {
     s32 pad[6];
     Mat4 spC8;
@@ -2168,16 +2004,6 @@ void func_8029B2E4(Camera *arg0, struct Actor *arg1) {
         }
 }
 
-extern f32 D_802B9700;
-extern f32 D_802B9704;
-extern f32 D_802B9708;
-extern f32 D_802B970C;
-
-//s32 func_802B4FF8(Mat4, s32);
-extern s8 toads_turnpike_dl_10[];
-extern s8 toads_turnpike_dl_11[];
-extern s8 toads_turnpike_dl_9[];
-
 void func_8029B4E0(Camera *arg0, struct Actor *arg1) {
     s32 pad[6];
     Mat4 spC8;
@@ -2211,15 +2037,6 @@ void func_8029B4E0(Camera *arg0, struct Actor *arg1) {
     }
 }
 
-extern f32 D_802B9710;
-extern f32 D_802B9714;
-extern f32 D_802B9718;
-extern f32 D_802B971C;
-
-extern Gfx toads_turnpike_dl_6[];
-extern Gfx toads_turnpike_dl_7[];
-extern Gfx toads_turnpike_dl_8[];
-
 void func_8029B6EC(Camera *camera, struct Actor* arg1) {
     s32 pad[6];
     Mat4 spC8;
@@ -2252,20 +2069,6 @@ void func_8029B6EC(Camera *camera, struct Actor* arg1) {
     }
 }
 
-extern Gfx D_0601B978[];
-extern Gfx D_0601C0F0[];
-extern Gfx D_0601D160[];
-extern Gfx D_0601D670[];
-extern Gfx D_0601E480[];
-extern Gfx D_0601E910[];
-extern Gfx D_06022D28[];
-extern Gfx D_06022D70[];
-extern Gfx D_06022DB8[];
-extern f32 D_802B9720;//  = 9e6.0f;
-extern f32 D_802B9724;// = 122500.0f;
-extern f32 D_802B9728;// = 640000.0f;
-extern f32 D_802B972C;// = 1440000.0f;
-
 void func_8029B8E8(Camera *camera, struct TrainCar *actor) {
     s32 pad[3];
     Vec3f sp160;
@@ -2382,15 +2185,6 @@ void func_8029B8E8(Camera *camera, struct TrainCar *actor) {
     gSPSetGeometryMode(gDisplayListHead++, G_CULL_BACK);
 }
 
-extern Gfx D_0601F228[];
-extern Gfx D_0601F708[];
-extern Gfx D_0601FAF8[];
-extern Gfx D_06022D28[];
-extern f32 D_802B9730;
-extern f32 D_802B9734;
-extern f32 D_802B9738;
-extern f32 D_802B973C;
-
 void func_8029BFB0(Camera *camera, struct TrainCar *actor) {
     Mat4 sp120;
     Vec3f sp160;
@@ -2461,19 +2255,6 @@ void func_8029BFB0(Camera *camera, struct TrainCar *actor) {
     gSPSetGeometryMode(gDisplayListHead++, G_CULL_BACK);
 }
 
-extern Gfx D_06020A08[];
-extern Gfx D_06020A20[];
-extern Gfx D_06021220[];
-extern Gfx D_06021550[];
-extern Gfx D_06021A80[];
-extern Gfx D_06021C90[];
-extern Gfx D_06022D28[];
-extern Gfx D_06022DB8[];
-extern f32 D_802B9740;
-extern f32 D_802B9744;
-extern f32 D_802B9748;
-extern f32 D_802B974C;
-
 void func_8029C3CC(Camera *camera, struct TrainCar *actor) {
     Mat4 sp120;
     Vec3f sp160;
@@ -2589,12 +2370,6 @@ void func_8029C3CC(Camera *camera, struct TrainCar *actor) {
     gSPSetGeometryMode(gDisplayListHead++, G_CULL_BACK);
 }
 
-extern Gfx D_06006F88[];
-extern Gfx D_06006FE0[];
-
-extern f32 D_802B9750; // static = 4000000.0f;
-extern f32 D_802B9754; // static = 250000.0f;
-
 void func_8029CA90(Camera *camera, struct FallingRock *rock) {
     Vec3s sp98;
     Vec3f sp8C;
@@ -2703,8 +2478,6 @@ void func_8029CF0C(struct ActorSpawnData *spawnData, struct FallingRock *rock) {
     vec3s_set(rock->rot, 0, 0, 0);
 }
 
-void func_802AAAAC(UnkActorInner*);
-
 void place_falling_rocks(struct ActorSpawnData *spawnData) {
     s32 addr = SEGMENT_NUMBER2(spawnData);
     s32 offset = SEGMENT_OFFSET(spawnData);
@@ -2973,10 +2746,6 @@ void place_segment_06(u32 arg0) {
 GLOBAL_ASM("asm/non_matchings/code_actors/place_segment_06.s")
 #endif
 
-extern u16 random_u16();                                   /* extern */
-extern f32 func_802AE1C0(f32, f32, f32);
-extern s16 gPlaceItemBoxes;
-
 void place_all_item_boxes(struct ActorSpawnData *spawnData) {
     s16 temp_s1;
     f32 temp_f0;
@@ -3640,9 +3409,6 @@ block_50:
 GLOBAL_ASM("asm/non_matchings/code_actors/func_8029E890.s")
 #endif
 
-void func_80296D10(struct Actor *, f32 *, s16 *, f32 *, s32); /* extern */
-s16 func_8029E890(f32 *, s16 *, f32 *, s16);                             /* extern */
-
 s16 func_8029EC88(Vec3f pos, Vec3s rot, Vec3f velocity, s16 actorType) {
     s32 index;
 
@@ -4116,8 +3882,6 @@ block_36:
 GLOBAL_ASM("asm/non_matchings/code_actors/func_8029F69C.s")
 #endif
 
-extern f32 D_802B98AC;
-
 s32 func_8029FB80(Player *arg0, struct Actor *arg1) {
     f32 temp_f0;
     f32 temp_f12_2;
@@ -4157,8 +3921,6 @@ s32 func_8029FB80(Player *arg0, struct Actor *arg1) {
     return 1;
 }
 
-extern f32 D_802B98B0;
-
 s32 func_8029FCA4(struct Actor *arg0, struct Actor *arg1) {
     f32 temp_f0;
     f32 temp_f12_2;
@@ -4341,8 +4103,6 @@ GLOBAL_ASM("asm/non_matchings/code_actors/func_8029FDC8.s")
 #endif
 
 void func_802A00E8(struct Actor *arg0, struct Actor *arg1) {
-
-
     switch(arg0->type) {
         case ACTOR_GREEN_SHELL:
             if ((arg0->state == 0) || (arg0->state == 4)) {
@@ -4403,16 +4163,12 @@ void func_802A00E8(struct Actor *arg0, struct Actor *arg1) {
                 return;
             }
             break;
-
     }
 
     arg0->flags |= 0x100;
     func_800C98B8(arg0->pos, arg0->velocity, 0x19018010);
 }
 
-s32 func_8029FCA4(struct Actor*, struct Actor*); // extern
-void func_8029FDC8(struct Actor*);
-
 void func_802A0350(struct Actor *arg0, struct Actor *arg1) {
     if (func_8029FCA4(arg0, arg1) == 1) {
         if ((arg0->type == ACTOR_BLUE_SPINY_SHELL) && (arg1->type == ACTOR_BLUE_SPINY_SHELL)) {
@@ -4706,8 +4462,6 @@ void func_802A0450(Player *player, struct Actor *actor) {
 GLOBAL_ASM("asm/non_matchings/code_actors/func_802A0450.s")
 #endif
 
-extern Player gPlayers[];
-
 void func_802A0D54(void) {
     struct Actor *temp_a1;
     s32 i, j;
@@ -4732,9 +4486,6 @@ void func_802A0D54(void) {
     }
 }
 
-extern u16 gNumPermanentActors;
-void func_802A0350(struct Actor*, struct Actor*);
-
 void func_802A0E44(void) {
     struct Actor *phi_s0;
     struct Actor *temp_a1;
@@ -4792,9 +4543,6 @@ void func_802A0E44(void) {
     }
 }
 
-f32 func_802ABEAC(UnkActorInner*, Vec3f);
-extern f32 D_802B99CC;
-
 void func_802A1064(struct FakeItemBox *fake_item_box) {
     if (fake_item_box - (struct FakeItemBox*)gActorList <= (u32)ACTOR_LIST_SIZE) {
         if (((fake_item_box->flags & 0x8000) != 0) && (fake_item_box->type == ACTOR_FAKE_ITEM_BOX)) {
@@ -4805,11 +4553,6 @@ void func_802A1064(struct FakeItemBox *fake_item_box) {
     }
 }
 
-extern f32 D_802B99D0;
-extern f32 D_802B99D4;
-
-void func_802B4E30(struct Actor*);
-
 void update_obj_fake_item_box(struct FakeItemBox *fake_item_box) {
     u32 temp_v1 = fake_item_box->playerId;
     Player *temp_v0_4 = &gPlayers[temp_v1];
@@ -4933,9 +4676,6 @@ void update_obj_item_box_hot_air_balloon(struct ItemBox *itemBox) {
     }
 }
 
-extern f32 D_802B99D8;
-extern f32 D_802B99DC;
-
 void update_obj_item_box(struct ItemBox *itemBox) {
     switch (itemBox->state) {
         case 0:
@@ -5573,9 +5313,6 @@ block_42:
 GLOBAL_ASM("asm/non_matchings/code_actors/func_802A1EA0.s")
 #endif
 
-extern s8 D_0600CA60[];
-extern f32 D_802B9A28;
-
 void func_802A269C(Camera *arg0, struct Actor *arg1) {
     Mat4 sp38;
     f32 unk = func_802B80D0(arg0->pos, arg1->pos, arg0->rotX[1], 0, D_80150130[arg0 - camera1], D_802B9A28);
@@ -5592,11 +5329,6 @@ void func_802A269C(Camera *arg0, struct Actor *arg1) {
     }
 }
 
-extern s8 D_06016D70[];
-extern s8 D_06017FA8[];
-extern f32 D_802B9A2C;
-extern s32 D_800DC50C;
-
 void func_802A27A0(Camera *arg0, Mat4 arg1, struct YoshiValleyEgg *egg, u16 arg3) {
     Mat4 sp60;
     Vec3s sp5C;
@@ -5642,9 +5374,6 @@ void func_802A27A0(Camera *arg0, Mat4 arg1, struct YoshiValleyEgg *egg, u16 arg3
     }
 }
 
-extern s8 D_06009330[];
-
-
 void func_802A29BC(Camera *arg0, Mat4 arg1, struct Actor *arg2) {
     Mat4 sp40;
     f32 unk;
@@ -5664,13 +5393,6 @@ void func_802A29BC(Camera *arg0, Mat4 arg1, struct Actor *arg2) {
 
 s32 D_802B8850[] = {0, 0, 0};
 s16 D_802B885C[] = {0, 0, 0};
-//s16 filla;
-
-extern s8 D_06010AE8[];
-extern s8 D_06010C10[];
-extern s8 D_06010D38[];
-extern s8 D_802B8864[];
-
 
 void func_802A2AD0(Camera *arg0, struct Actor *arg1) {
     Vec3s sp80 = {0, 0, 0};
@@ -5697,13 +5419,6 @@ void func_802A2AD0(Camera *arg0, struct Actor *arg1) {
             gSPSetGeometryMode(gDisplayListHead++, G_CULL_BACK);
 }
 
-extern s8 D_060185F8[];
-extern s8 D_060186B8[];
-extern s8 D_06018948[];
-extern s8 D_06018A08[];
-extern s8 D_06018C98[];
-extern s8 D_06018D58[];
-
 void func_802A2C78(Camera *arg0, Mat4 arg1, struct Actor *arg2) {
     Vec3s spA8 = {0, 0, 0};
     Mat4 sp68;
@@ -5753,10 +5468,6 @@ void func_802A2C78(Camera *arg0, Mat4 arg1, struct Actor *arg2) {
     }
 }
 
-void func_802A171C(Camera*, struct Actor*); // extern
-void func_802A1EA0(Camera*, struct Actor*); // extern
-extern s32 D_8015F8DC;
-
 void func_802A2F34(struct UnkStruct_800DC5EC *arg0) {
     Camera *temp_s1 = arg0->camera;
     struct Actor *phi_s0;
@@ -5784,37 +5495,6 @@ void func_802A2F34(struct UnkStruct_800DC5EC *arg0) {
     }
 }
 
-void func_802986B4(Camera*, Mat4, struct Actor*);
-void func_80298D7C(Camera*, Mat4, struct Actor*);
-void func_802A27A0(Camera*, Mat4, struct YoshiValleyEgg*, u16);
-//void func_8029AE1C(Camera*, Mat4, struct Actor*, u16);
-
-extern Mat4 D_801502C0;
-extern s32 D_8015F8E0;
-
-void func_802994D4(Camera *, Mat4, struct Actor*);                  /* extern */
-void func_8029969C(Camera *, Mat4, struct Actor*);                 /* extern */
-void func_80299864(Camera *, Mat4, struct Actor*);               /* extern */
-void func_80299A2C(Camera *, Mat4, struct Actor*);              /* extern */
-void func_80299BF4(Camera *, Mat4, struct Actor*);                /* extern */
-void func_80299DBC(Camera *, Mat4, struct Actor*);                /* extern */
-void func_80299EDC(Camera *, Mat4, struct Actor*);                /* extern */
-void func_80299FFC(Camera *, Mat4, struct Actor*);              /* extern */
-void func_8029A11C(Camera *, Mat4, struct Actor*);              /* extern */
-void func_8029A8F4(Camera *, Mat4, struct BananaActor*);                  /* extern */
-void func_8029AC18(Camera *, Mat4, struct Actor*);                /* extern */
-//void func_8029AE1C(Camera *, struct Actor*, Mat4, u16);            /* extern */
-void func_8029B06C(Camera *, struct Actor*);                        /* extern */
-void func_8029B2E4(Camera *, struct Actor*);                       /* extern */
-void func_8029B6EC(Camera *, struct Actor*);                       /* extern */
-void func_8029B4E0(Camera *, struct Actor*);                       /* extern */
-void func_80297A50(Camera *, Mat4, struct Actor*);  
-void func_802A269C(Camera *, struct Actor*);                        /* extern */
-void func_802A29BC(Camera *, Mat4, struct Actor*);                   /* extern */
-void func_802A2AD0(Camera *, struct Actor*);                      /* extern */
-void func_802A2C78(Camera *, Mat4, struct Actor*);                   /* extern */
-
-extern void func_80297340(Camera*);
 void func_802A3008(struct UnkStruct_800DC5EC *arg0) {
     Camera *temp_s1 = arg0->camera;
     u16 sp92 = arg0->pathCounter;
diff --git a/src/code_80296A50.h b/src/code_80296A50.h
new file mode 100644
index 000000000..76fec38b0
--- /dev/null
+++ b/src/code_80296A50.h
@@ -0,0 +1,315 @@
+#ifndef CODE_80296A50_H
+#define CODE_80296A50_H
+
+#include "types.h"
+#include "actor_types.h"
+
+void func_80296D10(struct Actor *, f32 *, s16 *, f32 *, s32);
+void func_80297230(Camera*, struct Actor*);
+void func_802972B8(Camera*, struct Actor*);
+void func_80297340(Camera*);
+void func_80297524(intptr_t, s32, s32);
+void func_802976D8(Vec3s);
+void func_802976EC(UnkActorInner*, Vec3s);
+void func_80297760(struct Actor*, Vec3f);
+void func_802977B0(Player*);
+void func_802977E4(Player*);
+void func_80297818();
+void func_80297944();
+void func_8029794C(Vec3f, Vec3s, f32);
+void func_802979F8(struct Actor*, f32);
+void func_80297A50(Camera*, Mat4, struct Actor*);
+void update_obj_yoshi_valley_egg(struct YoshiValleyEgg*);
+void update_obj_trees_cacti_shrubs(struct Actor*);
+void update_obj_kiwano_fruit(struct KiwanoFruit*);
+void update_obj_paddle_wheel(struct PaddleWheelBoat*);
+void update_obj_train_engine(struct TrainCar*);
+void update_obj_train_car1(struct TrainCar*);
+void update_obj_train_car2(struct TrainCar*);
+void update_obj_piranha_plant(struct PiranhaPlant*);
+void func_80298328(Camera*, Mat4, struct PiranhaPlant*);
+void func_802986B4(Camera*, Mat4, struct Actor*);
+void func_80298D7C(Camera*, Mat4, struct Actor*);
+void func_80299144(Camera*, Mat4, struct Actor*);
+void func_8029930C(Camera*, Mat4, struct Actor*);
+void func_802994D4(Camera*, Mat4, struct Actor*);
+void func_8029969C(Camera*, Mat4, struct Actor*);
+void func_80299864(Camera*, Mat4, struct Actor*);
+void func_80299A2C(Camera*, Mat4, struct Actor*);
+void func_80299BF4(Camera*, Mat4, struct Actor*);
+void func_80299DBC(Camera*, Mat4, struct Actor*);
+void func_80299EDC(Camera*, Mat4, struct Actor*);
+void func_80299FFC(Camera*, Mat4, struct Actor*);
+void func_8029A11C(Camera*, Mat4, struct Actor*);
+void func_8029A23C(Camera*, Mat4, struct Actor*);
+void func_8029A3AC(Camera*, Mat4, struct ShellActor*);
+void func_8029A690(Camera*, Mat4, struct ShellActor*);
+void func_8029A75C(Camera*, Mat4, struct ShellActor*);
+void func_8029A828(Camera*, Mat4, struct ShellActor*);
+void func_8029A8F4(Camera*, Mat4, struct BananaActor*);
+void update_obj_wario_stadium_sign(struct Actor*);
+void update_obj_railroad_crossing(struct RailroadCrossing*);
+void update_obj_mario_raceway_sign(struct Actor*);
+void func_8029AC18(Camera*, Mat4, struct Actor*);
+void func_8029AE1C(Camera*, struct PaddleWheelBoat*, Mat4, u16);
+void func_8029B06C(Camera*, struct Actor*);
+void func_8029B2E4(Camera*, struct Actor*);
+void func_8029B4E0(Camera*, struct Actor*);
+void func_8029B6EC(Camera*, struct Actor*);
+void func_8029B8E8(Camera*, struct TrainCar*);
+void func_8029BFB0(Camera*, struct TrainCar*);
+void func_8029C3CC(Camera*, struct TrainCar*);
+void func_8029CA90(Camera*, struct FallingRock*);
+void place_piranha_plants(struct ActorSpawnData*);
+void place_palm_trees(struct ActorSpawnData*);
+void func_8029CF0C(struct ActorSpawnData*, struct FallingRock*);
+void place_falling_rocks(struct ActorSpawnData*);
+void update_obj_falling_rocks(struct FallingRock*);
+void place_all_item_boxes(struct ActorSpawnData*);
+void init_kiwano_fruit();
+void destroy_all_actors();
+void func_8029E7DC(struct Actor*);
+void destroy_actor(struct Actor*);
+s16  func_8029E890(f32 *, s16 *, f32 *, s16);
+s16  func_8029EC88(Vec3f, Vec3s, Vec3f, s16);
+s32  func_8029EEB8(Player*, Vec3f, f32, f32, f32);
+s32  func_8029FB80(Player*, struct Actor*);
+s32  func_8029FCA4(struct Actor*, struct Actor*);
+void func_8029FDC8(struct Actor*);
+void func_802A00E8(struct Actor*, struct Actor*);
+void func_802A0350(struct Actor*, struct Actor*);
+void func_802A0450(Player*, struct Actor*);
+void func_802A0D54();
+void func_802A0E44();
+void func_802A1064(struct FakeItemBox*);
+void update_obj_fake_item_box(struct FakeItemBox*);
+void func_802A14BC(f32, f32, f32);
+void update_obj_item_box_hot_air_balloon(struct ItemBox*);
+void update_obj_item_box(struct ItemBox*);
+void func_802A171C(Camera*, struct Actor*);
+void func_802A1EA0(Camera*, struct Actor*);
+void func_802A269C(Camera*, struct Actor*);
+void func_802A27A0(Camera*, Mat4, struct YoshiValleyEgg*, u16);
+void func_802A29BC(Camera*, Mat4, struct Actor*);
+void func_802A2AD0(Camera*, struct Actor*);
+void func_802A2C78(Camera*, Mat4, struct Actor*);
+void func_802A2F34(struct UnkStruct_800DC5EC*);
+void func_802A3008(struct UnkStruct_800DC5EC*);
+void update_simple_objects();
+
+// audio/external.c
+extern void func_800C98B8(Vec3f, Vec3f, u32);
+extern void func_800C9060(Player*, s32);
+extern void func_800C90F4(Player*, s32);
+extern void func_800C99E0(Vec3f, s32);
+extern void func_800C9D80(Vec3f*, Vec3f*, u32);
+
+extern struct Actor gActorList[];
+extern Player gPlayers[];
+extern u16 gNumActors;
+extern u16 gNumPermanentActors;
+
+extern Player *gPlayerOne;
+extern struct Controller gControllers[];
+
+extern s32 gActiveScreenMode;
+
+extern Camera *camera1;
+extern struct Actor gActorList[];
+extern Gfx *gDisplayListHead;
+extern s32 gModeSelection;
+extern s16 gCurrentCourseId;
+extern f32 D_80150130[];
+extern u16 D_801637B8[];
+extern Lights1 D_800DC610[];
+
+extern f32 gCourseDirection;
+
+extern uintptr_t gSegmentTable[];
+extern s16 gPlaceItemBoxes;
+
+extern f32 D_802B95F8;
+extern f32 D_802B9624;
+extern f32 D_802B9628;
+extern f32 D_802B964C;
+extern f32 D_802B9658;
+extern f32 D_802B965C;
+extern f32 D_802B9660;
+extern f32 D_802B9664;
+extern f32 D_802B9668;
+extern f32 D_802B966C;
+extern f32 D_802B9670;
+extern f32 D_802B9674;
+extern f32 D_802B9678;
+extern f32 D_802B967C;
+extern f32 D_802B9680;
+extern f32 D_802B9684;
+extern f32 D_802B9688;
+extern f32 D_802B968C;
+extern f32 D_802B9690;
+extern f32 D_802B9694;
+extern f32 D_802B9698;
+extern f32 D_802B969C;
+extern f32 D_802B96A0;
+extern f32 D_802B96A4;
+extern f32 D_802B96A8;
+extern f32 D_802B96AC;
+extern f32 D_802B96B0;
+extern f32 D_802B96B4;
+extern f32 D_802B96B4;
+extern f32 D_802B96DC;
+extern f32 D_802B96E0;
+extern f32 D_802B96E4;
+extern f32 D_802B96E8;
+extern f32 D_802B96EC;
+extern f32 D_802B96F0;
+extern f32 D_802B96F4;
+extern f32 D_802B96F8;
+extern f32 D_802B96FC;
+extern f32 D_802B9700;
+extern f32 D_802B9704;
+extern f32 D_802B9708;
+extern f32 D_802B970C;
+extern f32 D_802B9710;
+extern f32 D_802B9714;
+extern f32 D_802B9718;
+extern f32 D_802B971C;
+extern f32 D_802B9720;//  = 9e6.0f;
+extern f32 D_802B9724;// = 122500.0f;
+extern f32 D_802B9728;// = 640000.0f;
+extern f32 D_802B972C;// = 1440000.0f;
+extern f32 D_802B9730;
+extern f32 D_802B9734;
+extern f32 D_802B9738;
+extern f32 D_802B973C;
+extern f32 D_802B9740;
+extern f32 D_802B9744;
+extern f32 D_802B9748;
+extern f32 D_802B974C;
+extern f32 D_802B9750; // static = 4000000.0f;
+extern f32 D_802B9754; // static = 250000.0f;
+extern f32 D_802B98AC;
+extern f32 D_802B98B0;
+extern f32 D_802B99CC;
+extern f32 D_802B99D0;
+extern f32 D_802B99D4;
+extern f32 D_802B99D8;
+extern f32 D_802B99DC;
+extern f32 D_802B9A28;
+extern f32 D_802B9A2C;
+
+extern f64 D_802B9610;
+
+extern Gfx D_06006A68[];
+extern Gfx D_06006F88[];
+extern Gfx D_06006FE0[];
+extern Gfx D_060075A0[];
+extern Gfx D_06008528[];
+extern Gfx D_06008628[];
+extern Gfx D_06008728[];
+extern Gfx D_060090C8[];
+extern Gfx D_0600D4A0[];
+extern Gfx D_0600D578[];
+extern Gfx D_0600FC70[];
+extern Gfx D_06013BB8[];
+extern Gfx D_06013F20[];
+extern Gfx D_06015B48[];
+extern Gfx D_0601B978[];
+extern Gfx D_0601C0F0[];
+extern Gfx D_0601D160[];
+extern Gfx D_0601D670[];
+extern Gfx D_0601E480[];
+extern Gfx D_0601E910[];
+extern Gfx D_0601F228[];
+extern Gfx D_0601F708[];
+extern Gfx D_0601FAF8[];
+extern Gfx D_06020A08[];
+extern Gfx D_06020A20[];
+extern Gfx D_06021220[];
+extern Gfx D_06021550[];
+extern Gfx D_06021A80[];
+extern Gfx D_06021C90[];
+extern Gfx D_06022D28[];
+extern Gfx D_06022D28[];
+extern Gfx D_06022D28[];
+extern Gfx D_06022D70[];
+extern Gfx D_06022DB8[];
+extern Gfx D_06022DB8[];
+
+extern Gfx D_0D004C68[];
+extern Gfx D_0D005338[];
+extern Gfx D_0D005368[];
+extern Gfx D_0D007B20[];
+
+extern Gfx toads_turnpike_dl_0[];
+extern Gfx toads_turnpike_dl_1[];
+extern Gfx toads_turnpike_dl_2[];
+extern Gfx toads_turnpike_dl_3[];
+extern Gfx toads_turnpike_dl_4[];
+extern Gfx toads_turnpike_dl_5[];
+extern Gfx toads_turnpike_dl_6[];
+extern Gfx toads_turnpike_dl_7[];
+extern Gfx toads_turnpike_dl_8[];
+extern Gfx toads_turnpike_dl_9[];
+extern Gfx toads_turnpike_dl_10[];
+extern Gfx toads_turnpike_dl_11[];
+
+extern Mat4 D_801502C0;
+
+extern s16 D_8015F6EC;
+extern s16 D_8015F6EE;
+
+extern s32 D_800DC50C;
+extern s32 D_800DC50C;
+extern s32 D_8015F8DC;
+extern s32 D_8015F8E0;
+extern s32 D_801625EC;
+extern s32 D_801625F0;
+extern s32 D_801625F4;
+extern s32 D_802BA058;
+
+extern s8 D_06006990[];
+extern s8 D_06009330[];
+extern s8 D_0600CA60[];
+extern s8 D_0600D850[];
+extern s8 D_0600E058[];
+extern s8 D_0600E730[];
+extern s8 D_0600FC28[];
+extern s8 D_06010AE8[];
+extern s8 D_06010C10[];
+extern s8 D_06010D38[];
+extern s8 D_06013C00[];
+extern s8 D_06013CA0[];
+extern s8 D_06013D20[];
+extern s8 D_06013DA0[];
+extern s8 D_06013E20[];
+extern s8 D_06013F78[];
+extern s8 D_06016D70[];
+extern s8 D_06017FA8[];
+extern s8 D_060185F8[];
+extern s8 D_060186B8[];
+extern s8 D_06018948[];
+extern s8 D_06018A08[];
+extern s8 D_06018C98[];
+extern s8 D_06018D58[];
+extern s8 D_06023858[];
+extern s8 D_060238A0[];
+extern s8 D_060238E8[];
+
+extern s8 D_0D001B90[];
+extern s8 D_0D001BD8[];
+extern s8 D_0D001C20[];
+extern s8 D_0D001C88[];
+extern s8 D_0D004B48[];
+extern s8 D_0D004BD8[];
+extern s8 D_0D004E38[];
+extern s8 D_0D004E68[];
+extern s8 D_800DC628[];
+extern s8 D_800DC630[];
+extern s8 D_802B8864[];
+
+extern u16 D_800DC5BC;
+
+extern Vec3f D_8015F8D0;
+
+#endif
diff --git a/src/code_802B0210.c b/src/code_802B0210.c
index ffd55c7aa..0428e62ba 100644
--- a/src/code_802B0210.c
+++ b/src/code_802B0210.c
@@ -2,8 +2,8 @@
 #include <macros.h>
 #include <defines.h>
 #include <actor_types.h>
-
-void *vec3f_copy(Vec3f, Vec3f); // extern
+#include "math_util.h"
+#include "code_802B0210.h"
 
 void func_802B0210(UnkActorInner *arg0, UnkActorInner *arg1) {
     arg1->unk30 = arg0->unk30;
@@ -21,8 +21,6 @@ void func_802B0210(UnkActorInner *arg0, UnkActorInner *arg1) {
     vec3f_copy(arg1->unk60, arg0->unk60);
 }
 
-extern struct Actor gActorList[];
-
 void func_802B02B4(struct ShellActor *shell, s32 shellType) {
     struct TripleShellParent *parent = &gActorList[shell->parentIndex];
 
@@ -130,12 +128,6 @@ void func_802B04E8(s32 arg0, s16 arg1) {
 GLOBAL_ASM("asm/non_matchings/code_802B0210/func_802B04E8.s")
 #endif
 
-extern void func_800C9060(s32, s32);                            /* extern */
-extern void func_802B0464(s16);                               /* extern */
-extern void func_802B04E8(struct BananaActor *, s16);         /* extern */
-
-extern Player gPlayers[];
-
 void func_802B0570(struct BananaActor *banana) {
     struct BananaBunchParent *temp_v0_2;
 
diff --git a/src/code_802B0210.h b/src/code_802B0210.h
new file mode 100644
index 000000000..316fa8c08
--- /dev/null
+++ b/src/code_802B0210.h
@@ -0,0 +1,28 @@
+#ifndef CODE_802B0210_H
+#define CODE_802B0210_H
+
+#include "types.h"
+#include "actor_types.h"
+
+void func_802B0210(UnkActorInner*, UnkActorInner*);
+void func_802B02B4(struct ShellActor*, s32);
+void func_802B0464(s16);
+void func_802B04E8(struct BananaActor*, s16);
+void func_802B0570(struct BananaActor*);
+s32  func_802B09C0(s16);
+void update_obj_banana_bunch(struct BananaBunchParent*);
+s32  func_802B0E14(s16);
+void update_obj_triple_shell(struct TripleShellParent*, s16);
+void update_obj_green_shell(struct ShellActor*);
+void update_obj_red_blue_shell(struct ShellActor*);
+void update_obj_banana(struct BananaActor*);
+void func_802B30EC();
+void func_802B4E30(struct Actor*);
+
+// audio/external.c
+extern void func_800C9060(Player*, s32);
+
+extern struct Actor gActorList[];
+extern Player gPlayers[];
+
+#endif
diff --git a/src/main.c b/src/main.c
index 96a33caba..e0b067e9e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,7 +16,6 @@
 void func_8008C214(void);
 void func_80091B78(void);
 void func_802A4D18(void);
-void move_segment_table_to_dmem(void);
 void func_802A3E3C(void);
 void func_802A4160(void);
 void func_802A41D4(void);
@@ -24,7 +23,6 @@ void func_802A3CB0(void);
 void audio_init();
 void profiler_log_gfx_time(enum ProfilerGfxEvent eventID);
 void profiler_log_vblank_time(void);
-void create_thread(OSThread *thread, OSId id, void (*entry)(void *), void *arg, void *sp, OSPri pri);
 void create_debug_thread(void);
 void start_debug_thread(void);
 
@@ -33,17 +31,6 @@ extern void func_80057A50(s32 arg0, s32 arg1, char arg2[8], s16 arg3);
 
 struct SPTask *create_next_audio_frame_task(void);
 
-
-extern void dma_copy(u8 *dest, u8 *arg1, u32 size);
-extern s32 func_802A7D70(u8 *arg0, u8 *arg1);
-extern void func_802A7CF0(u32 arg0, u32 arg1);
-
-extern s32 D_800DC524;
-extern s32 gActiveScreenMode;
-
-
-extern f32 D_800DC594;
-
 struct VblankHandler *gVblankHandler1 = NULL;
 struct VblankHandler *gVblankHandler2 = NULL;
 
@@ -165,8 +152,6 @@ u32 gGfxSPTaskStack[256];
 OSMesg D_8015F3E0[32];
 OSMesgQueue D_8015F460;
 
-extern s16 sController1Unplugged;
-
 s32 D_800DC50C = 0xffff;
 u16 D_800DC510 = 0;
 u16 D_800DC514 = 0;
@@ -196,8 +181,8 @@ s32 D_800DC568 = 0;
 s32 D_800DC56C[8] = {0};
 s16 sNumVBlanks = 0;
 UNUSED s16 D_800DC590 = 0;
-float D_800DC594 = 0.0f;
-float gCourseTimer = 0.0f;
+f32 D_800DC594 = 0.0f;
+f32 gCourseTimer = 0.0f;
 
 
 extern u64 rspbootTextStart[], rspbootTextEnd[];
@@ -225,9 +210,6 @@ extern u32 *D_801978D0; // Segment? Keeps track of segmented addresses?
 //extern u16 gFramebuffer1;
 //extern u16 gFramebuffer2;
 
-extern void thread5_game_logic();
-extern void thread4_audio();
-
 extern s16 gCurrentlyLoadedCourseId;
 extern s16 gCurrentCourseId;
 
@@ -251,17 +233,6 @@ extern s32 gPlayerWinningIndex;
 
 extern s32 gEnableResourceMeters;
 
-// Declarations (in this file)
-void thread1_idle(void *arg0);
-void thread3_video(void *arg0);
-
-// Message IDs
-#define MESG_SP_COMPLETE 100
-#define MESG_DP_COMPLETE 101
-#define MESG_VI_VBLANK 102
-#define MESG_START_GFX_SPTASK 103
-#define MESG_NMI_REQUEST 104
-
 void create_thread(OSThread *thread, OSId id, void (*entry)(void *), void *arg, void *sp, OSPri pri) {
     thread->next = NULL;
     thread->queue = NULL;
@@ -1126,8 +1097,6 @@ void func_80002684(void) {
         }
 }
 
-extern s32 D_800DC600;
-extern s32 D_8015F8B8, D_8015F8BC, D_8015F8C0, D_8015F8C4, D_8015F8C8, D_8015F8CC;
 //extern u8 _networkSegmentRomStart;
 void thread5_game_logic(s32 arg0) {
     osCreateMesgQueue(&D_8014EF88, &D_8014F00C, 1);
diff --git a/src/main.h b/src/main.h
index cd15cbb32..1889f350a 100644
--- a/src/main.h
+++ b/src/main.h
@@ -3,6 +3,13 @@
 
 #include "types.h"
 
+// Message IDs
+#define MESG_SP_COMPLETE 100
+#define MESG_DP_COMPLETE 101
+#define MESG_VI_VBLANK 102
+#define MESG_START_GFX_SPTASK 103
+#define MESG_NMI_REQUEST 104
+
 #define MTX_POOL_SIZE 0x0683
 #define GFX_POOL_SIZE 0x1D4C
 struct GfxPool {
@@ -11,10 +18,56 @@ struct GfxPool {
     /* 0x28B20 */ struct SPTask spTask;
 }; // size = 0x28B70
 
+void create_thread(OSThread*, OSId, void (*entry)(void *), void*, void*, OSPri);
+void main_func();
+void thread1_idle(void*);
+void setup_mesg_queues();
+void start_sptask(s32);
+void func_800006E8();
+void init_controllers();
+void func_80000934(s32);
+void read_controllers();
+void func_80000BEC();
+void func_80000C0C(OSMesg);
+void send_display_list(struct SPTask*);
+void func_80000CA8();
+void func_80000CE8();
+void *clear_framebuffer(s32);
+void rendering_init();
+void config_gfx_pool();
+void display_and_vsync();
+void func_8000105C();
+void func_800010CC();
+void dma_copy(u8*, u8*, u32);
+void init_game();
+void func_80001ECC();
+void interrupt_gfx_sptask();
+void func_80001FAC();
+void func_800020D8(s32, struct VblankHandler*, OSMesgQueue*, OSMesg*);
+void start_gfx_sptask();
+void func_80002168();
+void func_80002284();
+void *func_800022DC();
+void thread3_video(void*);
+void func_800025D4();
+void func_80002600();
+void func_8000262C();
+void func_80002658();
+void func_80002684();
+void thread5_game_logic(s32);
+void thread4_audio(s32);
+
 extern struct GfxPool *gGfxPool;
 
 extern OSIoMesg gDmaIoMesg;
 extern OSMesg gMainReceivedMesg;
 extern OSMesgQueue gDmaMesgQueue;
+extern s32 D_800DC524;
+extern s32 gActiveScreenMode;
+extern f32 D_800DC594;
+extern s32 D_800DC600;
+extern s32 D_8015F8B8, D_8015F8BC, D_8015F8C0, D_8015F8C4, D_8015F8C8, D_8015F8CC;
+
+extern s16 sController1Unplugged;
 
 #endif
diff --git a/src/math_util.h b/src/math_util.h
index 702d32e6e..bb56c77ba 100644
--- a/src/math_util.h
+++ b/src/math_util.h
@@ -14,17 +14,39 @@
 
 #define sqr(x) ((x) * (x))
 
-s32 func_802B4FF8(Mat4, s32);
+s32  func_802B4FF8(Mat4, s32);
+f32  func_802B51E8(Vec3f, Vec3f);
+u32  func_802B5224(Vec3f, Vec3f);
+u32  func_802B5258(Vec3f, Vec3s);
+void vec3f_set(Vec3f, f32, f32, f32);
+void vec3s_set(Vec3s, s16, s16, s16);
+void *vec3f_copy(Vec3f, Vec3f);
+void vec3s_copy(Vec3s, Vec3s);
+void *sm64_vec3f_set(Vec3f, f32, f32, f32);
 void mtxf_identity(Mat4);
 void func_802B5398(Mat4, Mat4, s32);
 void func_802B5450(Mat4, Mat4, Mat4);
 void func_802B54EC(Mat4, Mat4, Mat4);
 void mtxf_translate(Mat4, Vec3f);
+void func_802B59DC(Mat4, s32);
+void func_802B5F74(Mat4, Vec3f, Vec3s);
+f32  func_802B80D0(Vec3f, Vec3f, u16, f32, f32, f32);
 void func_802B5F00(Mat4, f32);
 void func_802B71CC(Mat4, Mat4, Mat4);
 void func_802B75F8(Mtx*, Mat4);
-
-u16 atan2s(f32, f32);
+u16  atan2_lookup(f32, f32);
+u16  atan2s(f32, f32);
+f32  func_802B79B8(f32, f32);
+u16  func_802B7B50(f32, f32);
+void func_802B7C18(f32);
+s16  func_802B7C40(f32);
+void func_802B7C6C(f32);
+s16  func_802B7CA8(f32);
+void func_802B7CE8(f32);
+s16 func_802B7D28(f32);
+u16 random_u16();
+s32 random_int(u16);
+s16 func_802B7F34(f32, f32, f32, f32);
 f32 sins(u16);
 f32 coss(u16);
 
diff --git a/src/memory.c b/src/memory.c
index aaafd507a..e393c42b2 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -15,50 +15,15 @@
 //#include "segment_symbols.h"
 //#include "segments.h"
 
-#define ALIGN4(val) (((val) + 0x3) & ~0x3)
-#define ALIGN16(val) (((val) + 0xF) & ~0xF)
-#define ALIGN32(val) (((val) + 0xF) & ~0xF)
 
-struct MainPoolState {
-    u32 freeSpace;
-    struct MainPoolBlock *listHeadL;
-    struct MainPoolBlock *listHeadR;
-    struct MainPoolState *prev;
-};
-
-struct MainPoolBlock {
-    struct MainPoolBlock *prev;
-    struct MainPoolBlock *next;
-};
-
-extern uintptr_t gSegmentTable[16];
-
-extern s32 D_801502A0;
 s32 D_802BA270;
 s32 D_802BA274;
 u32 sPoolFreeSpace;
 struct MainPoolBlock *sPoolListHeadL;
 struct MainPoolBlock *sPoolListHeadR;
 
-extern u32 gPrevLoadedAddress;
-extern s32 gPrevMainThreadTask;
-
-extern Gfx *gDisplayListHead;
-extern u32 D_8015F724;
-extern u32 gHeapEndPtr;
-
-extern struct D_80150158 gD_80150158[];
-
 struct MainPoolState *gMainPoolState = NULL;
 
-struct UnkStruct_802B8CD4 {
-    s16 unk0;
-    s16 unk2;
-    s32 unk4;
-    s32 unk8;
-    s32 fill; 
-};
-
 struct UnkStruct_802B8CD4 D_802B8CD4[] = {
     0
 };
@@ -102,7 +67,6 @@ void func_802A7CF0(s32 start, s32 end) {
     gPrevLoadedAddress = start;
 }
 
-
 s32 func_802A7D1C(s32 arg0) {
     s32 addr;
 
@@ -119,9 +83,6 @@ UNUSED void func_802A7D54(s32 arg0, s32 arg1) {
     gD_80150158[arg0].unk8 = arg1;
 }
 
-void dma_copy(s32, s32, s32); // extern
-s32 func_802A7D1C(s32 arg0); // extern
-
 s32 func_802A7D70(s32 arg0, s32 arg1) {
     s32 temp_v0;
     s32 temp_a2 = arg1 - arg0;
@@ -334,18 +295,17 @@ UNUSED u32 func_802A82AC(s32 arg0) {
     return phi_v1;
 }
 
-s32 func_802A82E4(s32 arg0, s32 arg1) {
-    s32 sp24;
-    s32 sp1C;
+s32 func_802A82E4(u8 *start, u8 *end) {
+    s32 dest;
+    u32 size;
 
-    sp1C = ALIGN16(arg1 - arg0);
-    sp24 = gPrevLoadedAddress;
-    dma_copy(sp24, arg0, sp1C);
-    gPrevLoadedAddress += sp1C;
-    return sp24;
+    size = ALIGN16(end - start);
+    dest = gPrevLoadedAddress;
+    dma_copy(dest, start, size);
+    gPrevLoadedAddress += size;
+    return dest;
 }
 
-extern u8 _other_texturesSegmentRomStart[];
 // unused mio0 decode func.
 UNUSED s32 func_802A8348(s32 arg0, s32 arg1, s32 arg2) {
     s32 offset;
@@ -2319,9 +2279,6 @@ f32 func_802ABE30(f32 arg0, f32 arg1, f32 arg2, u16 arg3) {
     return ((tile->height * arg0) + (tile->rotation * arg2) + tile->height2) / -tile->gravity;
 }
 
-f32 func_802ABE30(f32, f32, f32, u16); // extern
-
-
 f32 func_802ABEAC(UnkActorInner *arg0, Vec3f arg1) {
     if (arg0->unk34 == 1) {
         return func_802ABE30(arg1[0], arg1[1], arg1[2], arg0->unk3A);
diff --git a/src/memory.h b/src/memory.h
index 0738fec11..431d37e89 100644
--- a/src/memory.h
+++ b/src/memory.h
@@ -1,22 +1,27 @@
 #ifndef MEMORY_H
 #define MEMORY_H
 
+#include "types.h"
 
+struct MainPoolBlock {
+    struct MainPoolBlock *prev;
+    struct MainPoolBlock *next;
+};
 
-#define MEMORY_POOL_LEFT  0
-#define MEMORY_POOL_RIGHT 1
-extern struct MemoryPool *gEffectsMemoryPool;
+struct MainPoolState {
+    u32 freeSpace;
+    struct MainPoolBlock *listHeadL;
+    struct MainPoolBlock *listHeadR;
+    struct MainPoolState *prev;
+};
 
-s32 func_802A7B70(s32 segment);
-uintptr_t set_segment_base_addr(s32 segment, void *addr);
-void *get_segment_base_addr(s32 segment);
-s32 lookup_item(u32 segment);
-s8 func_802ABD10(u16);
-s16 func_802ABD40(u16);
-s16 func_802ABD7C(u16);
-s16 func_802ABDB8(u16);
-s16 func_802ABDF4(u16);
-f32 func_802ABE30(f32, f32, f32, u16);
+struct UnkStruct_802B8CD4 {
+    s16 unk0;
+    s16 unk2;
+    s32 unk4;
+    s32 unk8;
+    s32 fill; 
+};
 
 struct AllocOnlyPool {
     s32 totalSpace;
@@ -25,5 +30,77 @@ struct AllocOnlyPool {
     u8 *freePtr;
 };
 
+#define MEMORY_POOL_LEFT  0
+#define MEMORY_POOL_RIGHT 1
+
+#define ALIGN4(val) (((val) + 0x3) & ~0x3)
+#define ALIGN16(val) (((val) + 0xF) & ~0xF)
+#define ALIGN32(val) (((val) + 0xF) & ~0xF)
+
+s32 func_802A7B70(s32);
+uintptr_t set_segment_base_addr(s32, void*);
+void *get_segment_base_addr(s32);
+s32   lookup_item(u32);
+void  move_segment_table_to_dmem();
+void  func_802A7CF0(s32, s32);
+s32   func_802A7D1C(s32);
+void  func_802A7D54(s32, s32);
+s32   func_802A7D70(s32, s32);
+void  main_pool_init(u32, u32);
+void *main_pool_alloc(u32, u32);
+u32   main_pool_free(void*);
+void *main_pool_realloc(void*, u32);
+s32   main_pool_available();
+u32   main_pool_push_state();
+u32   main_pool_pop_state();
+void *func_802A80B0(u8*, u8*, u8*);
+void *load_segment(s32, u8*, u8*, u32);
+void *func_802A8190(s32, s32);
+void  func_802A81EC();
+struct AllocOnlyPool *alloc_only_pool_init(u32, u32);
+u32  func_802A82AC(s32);
+s32  func_802A82E4(u8*, u8*);
+s32  func_802A8348(s32, s32, s32);
+s32  func_802A841C(s32, s32, s32);
+s32  func_802A84F4(s32, u32, u32);
+u32  MIO0_0F(s32, u32, u32);
+void func_802A8844();
+void func_802A884C(Gfx*, u8, s8);
+void func_802A8940(Gfx*, u8*, u8);
+void func_802A89C0(Gfx*, u8, u8);
+void func_802A8A04(Gfx*, u8, u8);
+void func_802A8A70(Gfx*, u8, u8);
+void func_802A8ADC(Gfx*, u8, u8);
+void func_802A8B48(Gfx*, u8, u8);
+void func_802A8BB4(Gfx*, u8, u8);
+void func_802A8C20(Gfx*, u8, u8);
+void func_802A8C8C(Gfx*, u8, u8);
+void func_802A8CF8(Gfx*, u8, u8);
+void func_802A8D64(Gfx*, u8, u8);
+void func_802A8DD0(Gfx*, u8, u8);
+void func_802A8E3C(Gfx*, u8, u8);
+void func_802A8EA8(Gfx*, u8, u8);
+void func_802A8F14(Gfx*, u8, u8);
+void func_802A94D8(Gfx*, u8, u8);
+void func_802A9544(Gfx*, u8, u8);
+void func_802AAAAC(UnkActorInner*);
+s8   func_802ABD10(u16);
+s16  func_802ABD40(u16);
+s16  func_802ABD7C(u16);
+s16  func_802ABDB8(u16);
+s16  func_802ABDF4(u16);
+f32  func_802ABE30(f32, f32, f32, u16);
+f32  func_802ABEAC(UnkActorInner*, Vec3f);
+void func_802ADDC8(UnkActorInner*, f32, f32, f32, f32);
+f32  func_802AE1C0(f32, f32, f32);
+
+// main.c
+extern struct D_80150158 gD_80150158[];
+extern s32 D_801502A0;
+extern u32 D_8015F724;
+extern u32 gPrevLoadedAddress;
+extern u32 gHeapEndPtr;
+
+extern u8 _other_texturesSegmentRomStart[];
 
 #endif // MEMORY_H