diff --git a/build.py b/build.py
index d8a89e5..449e59a 100644
--- a/build.py
+++ b/build.py
@@ -267,6 +267,11 @@ def build_35():
 
     add_lib_263(c_srcs, "build/3.5/c", "./psy-q/3.5/PSX/LIB/LIBC.LIB", "-DVERSION=35", "3.5")
 
+    c_srcs = [
+        'src/cd/c_002.c',
+    ]
+
+    add_lib_263(c_srcs, "build/3.5/cd", "./psy-q/3.5/PSX/LIB/LIBCD.LIB", "-DVERSION=35", "3.5")
 
 def build_36():
     snd_srcs = [
diff --git a/src/cd/c_002.c b/src/cd/c_002.c
new file mode 100644
index 0000000..30525ff
--- /dev/null
+++ b/src/cd/c_002.c
@@ -0,0 +1,45 @@
+#include "../types.h"
+#include "c_002.h"
+
+static s32 reg0 = 0x1F801800;
+static s32 reg1 = 0x1F801801;
+static s32 reg2 = 0x1F801802;
+static s32 reg3 = 0x1F801803;
+
+s32 Stframe_no;
+s32 StFinalSector;
+s16 Stsector_offset;
+
+void StClearRing(void);
+
+s32 StRgb24;
+s32 StEmu_Idx;
+s32 StFunc1;
+s32 StCdIntrFlag;
+s32 StFunc2;
+s32 StRingIdx1;
+s32 StRingIdx2;
+s32 StRingIdx3;
+s32 StStartFrame;
+s32 StCHANNEL;
+
+void init_ring_status(s32, s32);
+
+s32 StEmu_Addr;
+s32 StEndFrame;
+s32 StSTART_FLAG;
+s32 StRingAddr;
+s32 StRingBase;
+s32 StRingSize;
+s32 CChannel;
+
+void StClearRing(void) {
+    StRingIdx3 = 0;
+    StRingIdx2 = 0;
+    StRingIdx1 = 0;
+    StFinalSector = 0;
+    init_ring_status(0, StRingSize);
+    StCdIntrFlag = 0;
+    Stsector_offset = 0;
+    Stframe_no = 0;
+}
diff --git a/src/cd/c_002.h b/src/cd/c_002.h
new file mode 100644
index 0000000..d81834f
--- /dev/null
+++ b/src/cd/c_002.h
@@ -0,0 +1,32 @@
+extern s32 dummy0;
+extern s32 dummy1;
+extern s32 dummy2;
+extern s32 dummy3;
+extern s32 dummy4;
+extern s32 dummy5;
+extern s32 dummy6;
+extern s32 dummy7;
+extern s32 dummy8;
+extern s32 dummy9;
+extern s32 dummy10;
+
+s32 StRingAddr; /* 11 */
+s32 StRingBase; /* 12 */
+s32 StRgb24; /* 13 */
+s32 StEmu_Addr; /* 14 */
+s32 StEmu_Idx; /* 15 */
+s32 StRingSize; /* 16 */
+s32 StRingIdx1; /* 17 */
+s32 StRingIdx2; /* 18 */
+s32 StRingIdx3; /* 19 */
+s32 StSTART_FLAG; /* 20 */
+s32 StStartFrame; /* 21 */
+s32 StEndFrame; /* 22 */
+s32 StFinalSector; /* 23 */
+s32 StFunc1; /* 24 */
+s32 StFunc2; /* 25 */
+s32 Stframe_no; /* 26 */
+s16 Stsector_offset; /* 27 */
+s32 StCdIntrFlag; /* 28 */
+s32 StCHANNEL; /* 29 */
+s32 CChannel; /* 30 */