diff --git a/splat.yaml b/splat.yaml
index 91dce6c3..e2c52010 100644
--- a/splat.yaml
+++ b/splat.yaml
@@ -59,7 +59,7 @@ segments:
     - [0xC970, asm]
     - [0xCE80, asm] #
     - [0xD470, asm] #
-    - [0xDDC0, asm] #
+    - [0xDDC0, c]
     - [0xE1C0, asm] #
     - [0xE570, asm] #
     - [0xE890, asm] #
diff --git a/src/DDC0.c b/src/DDC0.c
new file mode 100644
index 00000000..ff9d92f6
--- /dev/null
+++ b/src/DDC0.c
@@ -0,0 +1,133 @@
+#include "ultra64.h"
+#include "dp_intro.h"
+
+extern s32 D_800A83A0;
+extern s32 D_800A847C;
+extern s32 D_800A8478;
+
+extern OSThread D_800A8480;
+extern u8 D_800AA660[];
+
+extern OSMesgQueue D_800A83AC;
+extern OSMesgQueue D_800A8414;
+
+extern void func_80004CC0(void *, s32, s32);
+
+struct Unk800A83A8 {
+    OSMesg mesg;
+    OSMesgQueue queue;
+    char filler1C[0x4];
+    OSMesg mesg20;
+    OSMesgQueue queue24;
+    char filler3C[0x2C];
+};
+
+extern struct Unk800A83A8 D_800A83A8[];
+
+void func_8000D1C0(void) {
+
+}
+
+void func_8000D1C8(void) {
+
+}
+
+void func_8000D1D0(void) {
+
+}
+
+void func_8000D1D8(void) {
+
+}
+
+void func_8000D1E0(void) {
+    D_800A847C = -1;
+}
+
+void func_8000D1F0(s32 arg0) {
+    if (arg0 != D_800A847C) {
+        if (D_800A847C >= 0) {
+            func_8004B9C4(0);
+        }
+        func_8004B1CC(arg0);
+        D_800A847C = arg0;
+    }
+}
+
+void func_8000D23C(s32 arg0) {
+    if (arg0 != D_800A847C) {
+        func_8004B1CC();
+        D_800A847C = arg0;
+    }
+}
+
+void func_8000D278(void) {
+    if (D_800A847C >= 0) {
+        func_8004B9C4();
+        D_800A847C = -1;
+    }
+}
+
+s32 func_8000D2B4(s32 arg0) {
+    s32 retvar = 0;
+    
+    if (arg0 != 0) {
+        func_8004FCD8(2);
+    }
+    while (func_800484E0() != 0) {
+        if (retvar < 1000000) {
+            retvar++;
+        } else if (retvar == 1000000) {
+            func_8004FD44();
+            retvar++;
+        }
+    }
+    return retvar;
+}
+
+void func_8000D338(void) {
+    func_8004FD64(0x10);
+}
+
+void func_8000D358(void) {
+    D_800A83A0 = 0;
+    func_8003D4A0(0);
+}
+
+void func_8000D380(void) {
+    func_8003D4A0(1);
+    D_800A83A0 = 1;
+}
+
+void func_8000D3A8(void *unused) {
+    __osSetFpcCsr(0x01000C01);
+    func_80004CC0(&D_800A8480, 1, 1);
+    func_80005328(&D_800A8480);
+    D_800A83A0 = 1;
+    D_800A847C = -1;
+    D_800A8478 = 0;
+    osCreateMesgQueue(&D_800A83AC, &D_800A83A8[0].mesg, 1);
+    osCreateMesgQueue(&D_800A8414, &D_800A83A8[1].mesg, 1);
+    osSendMesg(&D_800A83AC, (void* )0x444F4E45, 0);
+    osSendMesg(&D_800A8414, (void* )0x444F4E45, 0);
+    func_800373D8();
+    func_8004AF24(0);
+    func_8004AE90(3, 4);
+
+    // thread loop
+    while(1) {
+        func_80004CF4(&D_800A8480);
+        func_80009210();
+        if ((D_800A83A0 != 0) && (D_800A62E0.unkA38 < 0x15)) {
+            func_80037340(&D_800A83A8[D_800A8478].mesg20);
+            func_800053B4(&D_800A83A8[D_800A8478], 0);
+        }
+        D_800A8478 ^= 1;
+        func_80009210();
+    }
+}
+
+void func_8000D564(void) {
+    osCreateThread(&D_800A8480, 4, func_8000D3A8, NULL, D_800AA660, 0x50);
+    osStartThread(&D_800A8480);
+}
diff --git a/src/dp_intro.c b/src/dp_intro.c
index 52e111bc..b23e3a1e 100644
--- a/src/dp_intro.c
+++ b/src/dp_intro.c
@@ -98,13 +98,6 @@ extern s32 D_80084758;
 // .bss?
 extern u64 D_80084760[0x100/sizeof(u64)];
 
-struct UnkStruct800A62E0 {
-    char filler0[0xA38];
-    s16 unkA38;
-};
-
-extern struct UnkStruct800A62E0 D_800A62E0;
-
 // function prototypes
 void func_80001AD4(u16 arg0);
 void func_80001C1C(struct UnkArray4* arg0, u8 arg1, u8 arg2, u8 arg3, u8 arg4, s32 arg5, s32 arg6, s32 arg7);
diff --git a/src/dp_intro.h b/src/dp_intro.h
index 846d7ac6..ac8e319c 100644
--- a/src/dp_intro.h
+++ b/src/dp_intro.h
@@ -3,6 +3,13 @@
 
 #include <PR/ultratypes.h>
 
+struct UnkStruct800A62E0 {
+    char filler0[0xA38];
+    s16 unkA38;
+};
+
+extern struct UnkStruct800A62E0 D_800A62E0;
+
 void func_80001474(s8, s8);
 void func_800019C8(void);