diff --git a/compile_flags.txt b/compile_flags.txt
new file mode 100644
index 0000000..669cc98
--- /dev/null
+++ b/compile_flags.txt
@@ -0,0 +1,5 @@
+-Iinclude
+-Ilib/libreultra/include/2.0I
+-D_LANGUAGE_C
+-D_FINALROM 
+-DF3DEX_GBI_2 
\ No newline at end of file
diff --git a/include/common.h b/include/common.h
index 50d1ead..edfe604 100644
--- a/include/common.h
+++ b/include/common.h
@@ -10,6 +10,8 @@ typedef u8 bool;
 #define false 0
 #define true 1
 
+#define MAX_BYTES_TO_READ 512
+
 typedef struct {
     /* 0x00 */ s32 field_0x0;
     /* 0x04 */ s32 field_0x4;
@@ -41,9 +43,116 @@ typedef struct {
     /* 0xc */ s32 field_0xc;
 } Stack__dma_load_loop; // size:0x10
 
-extern void romCopy(const void* src, const void* dst, const s32 len);
+typedef struct {
+    /* 0x00 */ OSMesgQueue field_0x0;
+    /* 0x30 */ u8 field_0x30[0x58];
+    /* 0x88 */ OSMesgQueue field_0x70;
+    /* 0x74 */ u8 field_0x74[0x20];
+    /* 0xa8 */ OSMesgQueue field_0xa8;
+} Unk0;
 
-extern void Stack__dma_load_loop_new(Stack__dma_load_loop* arg0, OSMesgQueue* arg1, s16 arg2);
+
+extern SomethingMusic* __MAYBE_SONG_ARRAY_800A8218[7];
+extern void* musCurrentPtrBank;
+extern void* D_800B1828;
+
+extern s32 D_800E8B14;
+extern Unk0 MQ_800E8B4C;
+extern s32 __SCREEN_IS_NOT_BLACK;
+extern s32 D_800A9EB0;
+extern s32 D_800A9EE0;
+extern s32 D_800C4B20;
+extern void* D_800C4CE0;
+extern s32 D_A9EF0;
+extern s32 D_800C4B30;
+
+extern OSPiHandle* CART_HANDLE;
+extern OSMesgQueue MQ_800BE030;
+extern OSMesg OSMESG_800BE048[0x32];
+extern OSThread THREAD_CONTROLLER;
+
+extern s32 __SCREEN_IS_NOT_BLACK;
+extern OSMesg D_800BBE60[8];
+
+extern OSMesgQueue MQ_CONTROLLER;
+extern OSMesgQueue MQ_800E7988;
+extern OSThread THREAD_CONTROLLER;
+
+extern OSPiHandle* PTR_CART_ROM_HANDLE;
+
+extern s32 D_800C4B30;
+extern OSMesgQueue MQ_CONTROLLER;
+extern OSMesgQueue MQ_800E9BF0;
+extern u8 D_800A9FF8;
+
+extern OSContStatus __GLOBAL_CONT_STATUS[MAXCONTROLLERS];
+extern OSMesgQueue MQ_CONTROLLER;
+extern void (*D_800A9FE0)(s16);
+extern OSMesgQueue MQ_800C4A00;
+extern OSContPad __GLOBAL_CONTROLLER_DATA;
+
+extern u8 D_800AA040;
+extern void (*SWAP_BUFFER_FUNC_800A9E8C)(void** buffers);
+
+extern void (*D_800AA090)(s32);
+extern void (*D_800AA094)();
+extern s32 D_800E79A4;
+extern OSMesgQueue MQ_800C4C28;
+extern OSMesg OSMESG_800BE1A0[8];
+extern u8 SP_THREAD_800BE1C0[1];
+extern OSThread THREAD_800BE1C0;
+extern void* D_800AA41C;
+extern u8 D_594284;
+
+extern void (*SWAP_BUFFER_FUNC)(void** buffers);
+
+extern Stack__dma_load_loop *D_800E9178[0];
+extern u8 __MAIN_NOT_NULL_INF_LOOP;
+extern OSMesgQueue MQ_800B9C40;
+extern s8 D_800E918D;
+
+extern void romCopy(const void* src, void* dst, u32 len);
+extern void __calls_romCopy_8009DA50(u8* src, u8* dst, u32 len);
+
+extern void Stack__dma_load_loop_new(Stack__dma_load_loop* arg0, OSMesgQueue* arg1, s16 flags);
 extern void Stack__dma_load_loop_delete(Stack__dma_load_loop* arg0);
 
+extern void obInitializePi();
+
+extern void __set_black();
+extern void __calls_osViBlack(bool black);
+
+extern void __start_thread_800B9C88();
+extern void __start_thread_800BE1C0();
+
+extern void func_80089804(s32*, s32, s32, s32);
+extern void func_80089A10();
+extern void func_80089AB0(s32*, s32);
+
+extern void __osViSwapBuffer_3(void** buffers);
+extern void set_swap_buffer_func(void (*arg0)(void**));
+
+extern s32 func_80089CF8(s16 arg0, s32 arg1);
+extern void __controller_thread_80089D9C(void*);
+
+extern void __start_copy_global_controller_data(void);
+extern void __end_copy_global_controller_data(void);
+
+extern s32 __read_controller(OSContPad* data, u32 flags);
+extern s32 __real_read_controller(void);
+extern s32 __calls_read_controller_0(s16* arg0);
+
+extern void func_8008A354();
+extern void func_8008A37C();
+
+extern void func_8008B130(u8*);
+extern void func_8008B1D0(u8*);
+
+extern void __start_thread_800BE1C0(void);
+extern void __thread_8008AFE0(void*);
+
+extern void func_8008949C(void** buffers);
+extern void func_8008350C();
+extern void func_8008B1D0(u8*);
+
 #endif
\ No newline at end of file
diff --git a/splat.yaml b/splat.yaml
index ff2bbb2..5b070ac 100644
--- a/splat.yaml
+++ b/splat.yaml
@@ -106,7 +106,7 @@ segments:
       - [0x19FC0, c, "black"]
       - [0x1A050, c]
       - [0x1A4F0, asm]
-      - [0x1A5B0, asm]
+      - [0x1A5B0, c]
       - [0x1A660, c]
       - [0x1A9A0, c]      
       - [0x1AA00, c]
@@ -132,7 +132,7 @@ segments:
       - [0x1BCC0, asm, "libultra/io/pimgr"]
       - [0x1BE50, asm, "libultra/io/epirawdma"]
       - [0x1C040, asm, "libultra/io/epidma"]
-      - [0x1C0E0, asm]
+      - [0x1C0E0, c]
       - [0x1C130, asm]
       - [0x1C2B0, asm]
       - [0x1C670, asm, "libultra/io/piacs"]
diff --git a/src/19050.c b/src/19050.c
index 8e1ad83..99029a0 100644
--- a/src/19050.c
+++ b/src/19050.c
@@ -1,36 +1,18 @@
-#include "PR/os.h"
 #include "common.h"
 
-void func_8008949C(void*);
-
 INCLUDE_ASM(const s32, "19050", __idle_start_4_threads);
 
 /* 192F0 80088EF0*/
 s32* func_80088EF0(void) {
-    extern s32 D_800E8B14;
-
     return &D_800E8B14;
 }
 
-typedef struct {
-    /* 0x00 */ OSMesgQueue field_0x0;
-    /* 0x30 */ u8 field_0x30[0x58];
-    /* 0x88 */ OSMesgQueue field_0x70;
-    /* 0x74 */ u8 field_0x74[0x20];
-    /* 0xa8 */ OSMesgQueue field_0xa8;
-} Unk0;
-
-extern Unk0 MQ_800E8B4C;
-
 Unk0* func_80088EFC(void) {
     return &MQ_800E8B4C;
 }
 
 INCLUDE_ASM(const s32, "19050", __thread_80088F08);
 
-extern Stack__dma_load_loop *D_800E9178[0];
-extern u8 __MAIN_NOT_NULL_INF_LOOP;
-
 /* 19454 80089054 */
 void Stack__dma_load_loop_new(Stack__dma_load_loop* arg0, OSMesgQueue* mq, s16 flags)
 {
@@ -60,8 +42,6 @@ INCLUDE_ASM(const s32, "19050", __thread_80089200);
 
 INCLUDE_ASM(const s32, "19050", __thread_80089358);
 
-extern OSMesgQueue MQ_800B9C40;
-
 void __thread_800893C0(void) {
     typedef struct {
         /* 0x00 */ s32 field_0x0;
@@ -91,14 +71,30 @@ void __thread_800893C0(void) {
     }
 }
 
+extern struct {
+    OSMesgQueue mq;
+    u8 padding[0x549];
+    u8 b;
+} D_800E8C2C;
 
-INCLUDE_ASM(const s32, "19050", func_8008949C);
-
-// INCLUDE_ASM(const s32, "19050", func_80089528);
-
-void func_80089528(s8 arg0) {
-    extern s8 D_800E918D;
+/* 1989C 8008949C */
+void func_8008949C(void** buffers) 
+{
+    Stack__dma_load_loop sp10;
+    void* temp_s0 = buffers[3];
     
+    if (D_800E8C2C.b != 1)
+    {
+        while(osViGetNextFramebuffer() == temp_s0 || osViGetCurrentFramebuffer() == temp_s0)
+        {
+            Stack__dma_load_loop_new(&sp10, &D_800E8C2C.mq, 1);
+            osRecvMesg(&D_800E8C2C.mq, NULL, 1);
+            Stack__dma_load_loop_delete(&sp10);
+        }
+    }
+}
+
+void func_80089528(s8 arg0) {    
     D_800E918D = arg0;
 }
 
@@ -112,10 +108,7 @@ INCLUDE_ASM(const s32, "19050", __start_thread_800B9C88);
 INCLUDE_ASM(const s32, "19050", func_80089804);
 
 /* 19D90 80089990 */
-void func_80089990(s32 arg0) {
-    extern void func_80089A10();
-    extern s32 D_800AA090;
-
+void func_80089990(void (*arg0)(s32)) {
     s32 mask;
 
     func_80089A10();
diff --git a/src/19DD0.c b/src/19DD0.c
index c2bc66a..c4b43f7 100644
--- a/src/19DD0.c
+++ b/src/19DD0.c
@@ -1,10 +1,6 @@
 #include "common.h"
 
-#include <PR/os.h>
-
-extern void (*SWAP_BUFFER_FUNC)(void* buffers);
-
-void set_swap_buffer_func(void (*arg0)(void*)) {
+void set_swap_buffer_func(void (*arg0)(void**)) {
     s32 mask;
 
     mask = osSetIntMask(OS_IM_NONE);
diff --git a/src/1A050.c b/src/1A050.c
index ae6558b..afcf539 100644
--- a/src/1A050.c
+++ b/src/1A050.c
@@ -1,15 +1,5 @@
 #include "common.h"
 
-void romCopy(const void* src, const void* dst, const s32 len);
-s32 func_80089CF8(s16 arg0, s32 arg1);
-void __controller_thread_80089D9C(void*);
-
-OSPiHandle* CART_HANDLE;
-OSMesgQueue MQ_800BE030;
-OSMesg OSMESG_800BE048[0x32];
-OSThread THREAD_CONTROLLER;
-
-extern s32 __SCREEN_IS_NOT_BLACK;
 
 void func_80089C50(void) {
     __SCREEN_IS_NOT_BLACK = 0x80;
@@ -18,11 +8,6 @@ void func_80089C50(void) {
 
 // INCLUDE_ASM(const s32, "1A050", __init_controllers);
 
-extern OSMesg D_800BBE60[8];
-
-extern OSMesgQueue MQ_CONTROLLER;
-extern OSThread THREAD_CONTROLLER;
-
 /* 1A060 80089C60 */
 u8 __init_controllers(void) {
     u8 pattern;
@@ -40,12 +25,7 @@ u8 __init_controllers(void) {
     return pattern;
 }
 
-
-// INCLUDE_ASM(const s32, "1A050", func_80089CF8);
-
 s32 func_80089CF8(s16 arg0, s32 arg1) {
-    extern OSMesgQueue MQ_800E7988;
-
     typedef struct {
         /* 0x0 */ s16 unk0;
         /* 0x4 */ OSMesgQueue* msgQueue;
@@ -61,7 +41,7 @@ s32 func_80089CF8(s16 arg0, s32 arg1) {
     msg.unkC = arg1;
     msg.msgQueue = &sp10;
     
-    osCreateMesgQueue(&sp10, &sp38, 1 /* size */);
+    osCreateMesgQueue(&sp10, &sp38, 1);
     osSendMesg(&MQ_800E7988, &msg, OS_MESG_BLOCK);
     osRecvMesg(&sp10, NULL, OS_MESG_BLOCK);
     
@@ -77,17 +57,43 @@ void __start_controller_thread(void) {
     osStartThread(&THREAD_CONTROLLER);
 }
 
-
 INCLUDE_ASM(const s32, "1A050", __controller_thread_80089D9C);
 
-void initialise(void) {
-    extern s32 func_8008BD30();
-    extern s32 D_800E7A20;
-
+void obInitializePi(void) {
     osCreatePiManager(OS_PRIORITY_PIMGR, &MQ_800BE030, OSMESG_800BE048, sizeof(OSMESG_800BE048) / sizeof(OSMesg));
-    D_800E7A20 = func_8008BD30();
+    PTR_CART_ROM_HANDLE = osCartRomInit();
+}
+
+/* 1A380 80089F80 */
+void romCopy(const void *src, void *dst, u32 len) {
+    OSIoMesg dmaIoMesgBuf;
+    
+    OSMesgQueue dmaMessageQ;
+    OSMesg dummyMesg;
+    u32 readlength;
+    
+    osCreateMesgQueue(&dmaMessageQ, &dummyMesg, 1);
+    dmaIoMesgBuf.hdr.pri = 0;
+    dmaIoMesgBuf.hdr.retQueue = &dmaMessageQ;
+    osInvalDCache(dst, len);
+    while (len != 0) {
+        readlength = len;
+        if (readlength > MAX_BYTES_TO_READ) {
+            readlength = MAX_BYTES_TO_READ;
+        }
+        
+        dmaIoMesgBuf.devAddr = (u32)src;
+        dmaIoMesgBuf.dramAddr = dst;
+        dmaIoMesgBuf.size = readlength;
+        // Start the DMA transfer
+        osEPiStartDma(PTR_CART_ROM_HANDLE, &dmaIoMesgBuf, 0);
+        // Wait for the DMA transfer to complete
+        osRecvMesg(&dmaMessageQ, &dummyMesg, 1);
+        src += readlength;
+        dst += readlength;
+        len -= readlength;
+    }
 }
 
-INCLUDE_ASM(const s32, "1A050", romCopy);
 
 INCLUDE_ASM(const s32, "1A050", func_8008A040);
diff --git a/src/1A5B0.c b/src/1A5B0.c
new file mode 100644
index 0000000..5569894
--- /dev/null
+++ b/src/1A5B0.c
@@ -0,0 +1,30 @@
+#include "common.h"
+
+/* 1A5B0 8008A1B0 */
+void func_8008A1B0(void) {
+    struct {
+        /* 0x00 */ s32 field_0x0;
+        /* 0x04 */ void* field_0x4;
+        /* 0x08 */ s32 field_0x8;
+        /* 0x0c */ s32 field_0xc;
+        /* 0x10 */ s32 field_0x10;
+        /* 0x14 */ s32 field_0x14;
+    } sp10;
+    u8 pad[0x7F0];
+
+    __start_thread_800BE1C0();
+    func_80089AB0(&D_800A9EE0, 3);
+    D_800C4B20 = 0x80000400;
+    set_swap_buffer_func(&__osViSwapBuffer_3);
+    D_800C4CE0 = &D_800A9EB0;
+    __start_thread_800B9C88();
+    sp10.field_0x0 = 0xDE000000;
+    sp10.field_0x4 = &D_A9EF0;
+    sp10.field_0x8 = 0xE9000000;
+    sp10.field_0xc = 0;
+    sp10.field_0x10 = 0xDF000000;
+    sp10.field_0x14 = 0;
+    func_80089804(&sp10, 0x18, 0, 0);
+    func_80089A10();
+}
+
diff --git a/src/1A660.c b/src/1A660.c
index 6e4ac76..dfa7797 100644
--- a/src/1A660.c
+++ b/src/1A660.c
@@ -1,24 +1,8 @@
 #include "common.h"
 
-void __start_copy_global_controller_data(void);
-void __end_copy_global_controller_data(void);
-
-s32 __read_controller(OSContPad* data, u32 flags);
-s32 __real_read_controller(void);
-s32 __calls_read_controller_0(s16* arg0);
-
-extern void func_8008A354();
-extern void func_8008A37C();
-
-extern s32 D_800C4B30;
-extern OSMesgQueue MQ_CONTROLLER;
-extern OSMesgQueue MQ_800E9BF0;
 
 INCLUDE_ASM(const s32, "1A660", func_8008A260);
 
-extern void func_8008B1D0(u8*);
-extern u8 D_800A9FF8;
-
 void func_8008A334(void) {
     func_8008B1D0(&D_800A9FF8);
 }
@@ -49,9 +33,6 @@ s32 __read_controller(OSContPad* data, u32 flags) {
     return 0;
 }
 
-extern OSContStatus __GLOBAL_CONT_STATUS[MAXCONTROLLERS];
-extern OSMesgQueue MQ_CONTROLLER;
-
 s32 __real_read_controller(void) {
     s32 var_v0;
 
@@ -65,9 +46,6 @@ s32 __real_read_controller(void) {
     }
 }
 
-extern void (*D_800A9FE0)(s16);
-extern OSMesgQueue MQ_800C4A00;
-extern OSContPad __GLOBAL_CONTROLLER_DATA;
 
 s32 __calls_read_controller_0(s16* arg0) {
     if (D_800C4B30 == 0) {
diff --git a/src/1A9A0.c b/src/1A9A0.c
index 34a07c4..2dddda4 100644
--- a/src/1A9A0.c
+++ b/src/1A9A0.c
@@ -1,7 +1,5 @@
 #include "common.h"
 
-extern s32 D_800C4B30;
-
 void func_8008A5A0(void) {
     s32 temp_v0;
 
diff --git a/src/1AA00.c b/src/1AA00.c
index c147952..cf59e9c 100644
--- a/src/1AA00.c
+++ b/src/1AA00.c
@@ -1,26 +1,15 @@
 #include "common.h"
 
-#include <PR/os.h>
-
-extern OSContPad __GLOBAL_CONTROLLER_DATA;
-
-extern void __end_copy_global_controller_data();
-extern void __start_copy_global_controller_data();
-
 void __copy_global_controller_data(OSContPad* arg0) {
     __start_copy_global_controller_data();
     bcopy(&__GLOBAL_CONTROLLER_DATA, arg0, 0x18);
     __end_copy_global_controller_data();
 }
 
-extern void func_80089CF8(s32, s32);
-
 void func_8008A640(void) {
     func_80089CF8(0x103, 0);
 }
 
-extern void(*D_800A9FE0)(s16);
-
 void __set_fp_8008A660(void(*arg0)(s16)) {
     s32 mask;
 
diff --git a/src/1AAA0.c b/src/1AAA0.c
index ebdd9fd..8c0537d 100644
--- a/src/1AAA0.c
+++ b/src/1AAA0.c
@@ -1,13 +1,9 @@
 #include "common.h"
 
-extern void func_8008B130(u8*);
-extern u8 D_800AA040;
-
 void func_8008A6A0(void) {
     func_8008B130(&D_800AA040);
 }
 
-extern void func_8008B1D0(u8*);
 
 void func_8008A6C0(void) {
     func_8008B1D0(&D_800AA040);
diff --git a/src/1B3A0.c b/src/1B3A0.c
index 6c4835a..da144fb 100644
--- a/src/1B3A0.c
+++ b/src/1B3A0.c
@@ -1,9 +1,7 @@
 #include "common.h"
 
-extern void (*SWAP_BUFFER_FUNC_800A9E8C)(void*);
-
 /* 1B3A0 8008AFA0 */
-void set_swap_buffer_func_800A9E8C(void (*arg0)(void*)) {
+void set_swap_buffer_func_800A9E8C(void (*arg0)(void**)) {
     s32 mask;
 
     mask = osSetIntMask(OS_IM_NONE);
diff --git a/src/1B3E0.c b/src/1B3E0.c
index 3e2fe47..1290dc2 100644
--- a/src/1B3E0.c
+++ b/src/1B3E0.c
@@ -1,14 +1,5 @@
 #include "common.h"
 
-void __start_thread_800BE1C0(void);
-void __thread_8008AFE0(void*);
-
-extern void (*D_800AA090)(s32);
-extern void (*D_800AA094)();
-extern s32 D_800E79A4;
-extern OSMesgQueue MQ_800C4C28;
-extern OSMesg OSMESG_800BE1A0[8];
-
 /* 1B3E0 8008AFE0 */
 void __thread_8008AFE0(void* arg0) {
     Stack__dma_load_loop sp10;
@@ -39,9 +30,6 @@ void __thread_8008AFE0(void* arg0) {
 }
 
 void __start_thread_800BE1C0(void) {
-    extern u8 SP_THREAD_800BE1C0[1];
-    extern OSThread THREAD_800BE1C0;
-
     osCreateThread(&THREAD_800BE1C0, 4, __thread_8008AFE0, NULL, SP_THREAD_800BE1C0, 0x32);
     osStartThread(&THREAD_800BE1C0);
 }
diff --git a/src/1C0E0.c b/src/1C0E0.c
new file mode 100644
index 0000000..d701df3
--- /dev/null
+++ b/src/1C0E0.c
@@ -0,0 +1,19 @@
+#include "common.h"
+
+#include <PR/os_internal.h>
+
+/* 1C0E0 8008BCE0 */
+s32 func_8008BCE0(void** arg0) {
+    // Use of `__osDisableInt()` and `__osRestoreInt()` 
+    // suggest that this is an library function. 
+
+    void* temp_v1;
+    u32 mask;
+
+    mask = __osDisableInt();
+    temp_v1 = D_800AA41C;
+    D_800AA41C = arg0;
+    *arg0 = temp_v1;
+    __osRestoreInt(mask);
+    return 0;
+}
diff --git a/src/2DE10.c b/src/2DE10.c
index af34072..9c6e4db 100644
--- a/src/2DE10.c
+++ b/src/2DE10.c
@@ -2,10 +2,8 @@
 
 INCLUDE_ASM(const s32, "2DE10", func_8009DA10);
 
-// INCLUDE_ASM(const s32, "2DE10", __calls_romCopy_8009DA50);
 /* 2DE50 8009DA50 */
-void __calls_romCopy_8009DA50(u8* src, u8* dst, u32 len)
-{
+void __calls_romCopy_8009DA50(u8* src, u8* dst, u32 len) {
     u8 sp1F[32];
     u8* _dst;
     u8* _src;
@@ -13,25 +11,16 @@ void __calls_romCopy_8009DA50(u8* src, u8* dst, u32 len)
 
     // align to 16
     _src = (u8*) (((u32) &sp1F[15] >> 4) << 4);
-    
-    if (len < 0x10)
-    {
-        _dst = dst;
-        
-        // copy into stack, length aligned to 2 bytes
-        romCopy(src, _src, (len + 1) & ~1);
 
-        len--;
-        // then copy from stack into destination
-        while(len != -1) 
-        {    
+    if (len < 16) {
+        _dst = dst;
+        // Copy into stack, length aligned to 2 bytes...
+        romCopy(src, _src, (len + 1) & ~1);
+        // ...then copy from stack into destination
+        for(len--; len != -1; len--)
             *_dst++ = *_src++;   
-            len--;
-        }
-    } 
-    else 
-    {
-        // too big to fit in our stack, so just do a regular copy
+    } else {
+        // Too big to fit in our stack, so just do a regular copy
         romCopy(src, dst, (len + 1) & ~1);
     }
 }
@@ -43,8 +32,6 @@ INCLUDE_ASM(const s32, "2DE10", __calls_romCopy_8009DAF4);
 
 INCLUDE_ASM(const s32, "2DE10", __calls_romCopy_8009DBB8);
 
-extern u8 D_594284;
-
 void* __add_0x594284(s32 arg0) {
     return arg0 + &D_594284;
 }
diff --git a/src/black.c b/src/black.c
index 78f7fe4..bb41504 100644
--- a/src/black.c
+++ b/src/black.c
@@ -1,13 +1,7 @@
-#include "PR/os.h"
 #include "common.h"
 
-void __set_black();
-void __calls_osViBlack(bool black);
-
 /* 19FC0 80089BC0 */
 void __set_black() {
-    extern s32 __SCREEN_IS_NOT_BLACK;
-
     __SCREEN_IS_NOT_BLACK = 0;
     __calls_osViBlack(true);
 }
diff --git a/src/boot.c b/src/boot.c
index aa2b755..35caf75 100644
--- a/src/boot.c
+++ b/src/boot.c
@@ -15,7 +15,6 @@ void boot(void) {
 void idle(void* arg) {
     extern void main_(void*);
     extern void __idle_start_4_threads(s32, s32);
-    extern void initialise();
     extern void (*D_800E7A18)();
 
     extern u8 SP_THREAD_FIRST_DMA_LOAD[1];
@@ -24,7 +23,7 @@ void idle(void* arg) {
 
     D_800E7A18 = NULL;
 
-    initialise();
+    obInitializePi();
     __idle_start_4_threads(2, 1);
 
     osViSetSpecialFeatures(OS_VI_DIVOT_ON | OS_VI_DITHER_FILTER_ON | OS_VI_GAMMA_OFF | OS_VI_GAMMA_DITHER_OFF);
diff --git a/src/main.c b/src/main.c
index a989f30..02b2566 100644
--- a/src/main.c
+++ b/src/main.c
@@ -45,7 +45,7 @@ INCLUDE_ASM(const s32, "main", func_80072398);
 
 INCLUDE_ASM(const s32, "main", func_80072710);
 
-INCLUDE_ASM(const s32, "main", func_80072738);
+INCLUDE_ASM(const s32, "main", __set_vi_mode);
 
 INCLUDE_ASM(const s32, "main", func_800727D8);
 
@@ -105,10 +105,6 @@ INCLUDE_ASM(const s32, "main", __calls_copy_controller_data);
 
 extern u8 __reset_compared_osTvType();                    /* extern */
 extern void* D_800C4BB8;
-extern OSViMode osViModeMpalHpf1;
-extern OSViMode osViModeMpalLan1;
-extern OSViMode osViModeNtscHpf1;
-extern OSViMode osViModeNtscLan1;
 
 #define OS_TV_TYPE_PAL 0
 #define OS_TV_TYPE_NTSC 1
@@ -190,7 +186,6 @@ INCLUDE_ASM(const s32, "main", func_80073F58);
 
 // INCLUDE_ASM(const s32, "main", func_80073FD4);
 
-extern SomethingMusic* __MAYBE_SONG_ARRAY_800A8218[7];
 /* 43D4 80073FD4 */
 void __initialize_song_mem(void) {
     s32 mask;
diff --git a/src/mus.c b/src/mus.c
index 4efc208..f911f69 100644
--- a/src/mus.c
+++ b/src/mus.c
@@ -1,9 +1,5 @@
 #include "common.h"
 
-extern void* musCurrentPtrBank;
-
-void func_8008350C();
-
 INCLUDE_ASM(const s32, "mus", func_800810F0);
 
 INCLUDE_ASM(const s32, "mus", func_8008123C);
@@ -46,9 +42,6 @@ void Mus__unknown_80081DB4(void* arg0) {
     }
 }
 
-
-extern void* D_800B1828;
-
 void* func_80081DF0(void* arg0) {
     if ((arg0 != NULL) && ((*(s32*)(arg0 + 0x10)) < 0)) {
         D_800B1828 = arg0;
diff --git a/symbol_addrs.txt b/symbol_addrs.txt
index b7edd41..3ec0929 100644
--- a/symbol_addrs.txt
+++ b/symbol_addrs.txt
@@ -6,6 +6,10 @@ __add_0x594284 = 0x8009DD28;
 
 __log_lha_error = 0x8007BB90;
 
+CartRomHandle = 0x800C4C50;
+osCartRomInit = 0x8008BD30;
+PTR_CART_ROM_HANDLE = 0x800E7A20;
+
 D_800A81C0 = 0x800A81C0; // size:0x30
 D_800C4BBC = 0x800C4BBC; // size:0x8
 D_800AEFE0 = 0x800AEFE0; // size:0x8
@@ -25,6 +29,7 @@ STR_rb = 0x800AE0A8; // type:asciz
 STR_wb = 0x800AE27C; // type:asciz
 STR_Unknown_method_skiped = 0x800AE284; // type:asciz
 
+__set_vi_mode = 0x80072738;
 __calls_osViSwapBuffer_8007307C = 0x8007307C;
 __osViSwapBuffer_3 = 0x8008B110;
 
@@ -353,7 +358,7 @@ __Mus_thread_80085908 = 0x80085908;
 THREAD_IDLE = 0x800AF440;
 idle = 0x8007F8E4;
 
-initialise = 0x80089F40;
+obInitializePi = 0x80089F40;
 
 boot = 0x8007F880;
 entry = 0x80070C00;
diff --git a/tools/m2ctx.py b/tools/m2ctx.py
new file mode 100644
index 0000000..b2450f8
--- /dev/null
+++ b/tools/m2ctx.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+
+import argparse
+import os
+import sys
+import subprocess
+import tempfile
+
+script_dir = os.path.dirname(os.path.realpath(__file__))
+root_dir = os.path.abspath(os.path.join(script_dir, ".."))
+src_dir = root_dir + "src/"
+
+# Project-specific
+CPP_FLAGS = [
+    "-Iinclude",
+    "-Isrc",
+    "-Ilib/libreultra/include/2.0I/",
+    "-D_LANGUAGE_C",
+    "-DF3DEX_GBI_2",
+    "-D_MIPS_SZLONG=32",
+    "-DSCRIPT(...)={}",
+    "-D__attribute__(...)=",
+    "-D__asm__(...)=",
+    "-ffreestanding",
+    "-DM2CTX",
+]
+
+def import_c_file(in_file) -> str:
+    in_file = os.path.relpath(in_file, root_dir)
+    cpp_command = ["gcc", "-E", "-P", "-dM", *CPP_FLAGS, in_file]
+    cpp_command2 = ["gcc", "-E", "-P", *CPP_FLAGS, in_file]
+
+    with tempfile.NamedTemporaryFile(suffix=".c") as tmp:
+        stock_macros = subprocess.check_output(["gcc", "-E", "-P", "-dM", tmp.name], cwd=root_dir, encoding="utf-8")
+
+    out_text = ""
+    try:
+        out_text += subprocess.check_output(cpp_command, cwd=root_dir, encoding="utf-8")
+        out_text += subprocess.check_output(cpp_command2, cwd=root_dir, encoding="utf-8")
+    except subprocess.CalledProcessError:
+        print(
+            "Failed to preprocess input file, when running command:\n"
+            + ' '.join(cpp_command),
+            file=sys.stderr,
+            )
+        sys.exit(1)
+
+    if not out_text:
+        print("Output is empty - aborting")
+        sys.exit(1)
+
+    for line in stock_macros.strip().splitlines():
+        out_text = out_text.replace(line + "\n", "")
+    return out_text
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="""Create a context file which can be used for mips_to_c"""
+    )
+    parser.add_argument(
+        "c_file",
+        help="""File from which to create context""",
+    )
+    args = parser.parse_args()
+
+    output = import_c_file(args.c_file)
+
+    with open(os.path.join(root_dir, "ctx.c"), "w", encoding="UTF-8") as f:
+        f.write(output)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/undefined_syms.txt b/undefined_syms.txt
index 7bd4e21..991ad72 100644
--- a/undefined_syms.txt
+++ b/undefined_syms.txt
@@ -37,4 +37,5 @@ D_80187020 = 0x80187020;
 D_80187030 = 0x80187030;
 D_8018F1A0 = 0x8018F1A0;
 D_8018FC18 = 0x8018FC18;
-D_800EB0E8 = 0x800EB0E8;
\ No newline at end of file
+D_800EB0E8 = 0x800EB0E8;
+D_800E8C2C = 0x800E8C2C;
\ No newline at end of file