diff --git a/src/3A80.c b/src/3A80.c
index d495e64..cba71a4 100644
--- a/src/3A80.c
+++ b/src/3A80.c
@@ -6,6 +6,11 @@ extern s32 D_80068B90;
 extern u8 D_80104BB0[];
 extern s32 D_800A60B0;
 
+void func_80003860(void);
+s32 func_80002A40(s32, s32);
+void func_80002BD0(s32, void *); // type unknown
+s32 func_80007A58(void);
+
 uintptr_t func_80002E80(uintptr_t addr) {
     uintptr_t retaddr = 0x00000000;
 
diff --git a/src/DDC0.c b/src/DDC0.c
index adccb24..4dfa2ef 100644
--- a/src/DDC0.c
+++ b/src/DDC0.c
@@ -1,3 +1,4 @@
+#include <PR/os_internal_reg.h>
 #include "ultra64.h"
 #include "dp_intro.h"
 
@@ -21,6 +22,19 @@ extern OSThread D_800A8480;
 
 extern u8 D_800AA660[];
 
+s32 func_800484E0(void);
+void func_80009210(void);
+void func_800373D8(void);
+void func_8004FD44(void);
+void func_8004B1CC();
+void func_8004B9C4();
+void func_80037340(void *);
+void func_8004FCD8(s32);
+void func_8003D4A0(s32);
+void func_8004AF24(s32);
+void func_8004FD64(s32);
+void func_8004AE90(s32, s32);
+
 void func_8000D1C0(void) {
 
 }
diff --git a/src/E1C0.c b/src/E1C0.c
index 31d741e..2540e31 100644
--- a/src/E1C0.c
+++ b/src/E1C0.c
@@ -1,6 +1,9 @@
 #include <ultra64.h>
+#include <PR/os_internal_reg.h>
 #include "dp_intro.h"
 #include "fragments.h"
+#include "intro_loader.h"
+#include "dp_intro.h"
 
 struct UnkInputStruct8000D738 {
     s32 unk0;
@@ -37,6 +40,15 @@ void func_81206D9C(void);
 void func_81206E64(void);
 void func_81206F38(void);
 
+// from 3A80.c
+extern uintptr_t func_80002E80(uintptr_t addr);
+
+void func_80005370(struct UnkStruct800AA660 *);
+void func_80004454(u32, void *, void *);
+char func_8000B318(char);
+s32 func_800044F4(void *, void *, s32, s32);
+s32 func_8000484C(s32, s32);
+
 void func_8000D5C0(void* unused) {
     void (*func)(void *) = func_80002E80(&func_81206F38);
     
diff --git a/src/dp_intro.h b/src/dp_intro.h
index ac8e319..cf8b756 100644
--- a/src/dp_intro.h
+++ b/src/dp_intro.h
@@ -12,5 +12,6 @@ extern struct UnkStruct800A62E0 D_800A62E0;
 
 void func_80001474(s8, s8);
 void func_800019C8(void);
+void func_80001C64(void);
 
 #endif /* _SRC_DP_INTRO_H_ */