diff --git a/src/800_c.c b/src/800_c.c
index 215959012..34e1064fe 100644
--- a/src/800_c.c
+++ b/src/800_c.c
@@ -2706,7 +2706,65 @@ void func_80038668(s32 a0, s32 a1) {
     *(baseptr + a1) &= 0xFE;
 }
 
-INCLUDE_ASM("asm/nonmatchings/800_c", func_80038698);
+
+s32 func_80038698(void *arg0) {
+    u8 *p;
+    register u32 len asm("$6");
+    u32 hi;
+    s32 div;
+
+    p = *(u8 **)arg0;
+    *(u8 **)arg0 = p + 1;
+    len = p[0];
+    *(u8 **)arg0 = p + 2;
+    len |= p[1] << 8;
+    *(u8 **)arg0 = p + 3;
+    len |= p[2] << 16;
+    *(u8 **)arg0 = p + 4;
+    len |= p[3] << 24;
+    if (len != 0x6468544D) {
+        return -1;
+    }
+    *(u8 **)arg0 = p + 5;
+    len = p[4];
+    *(u8 **)arg0 = p + 6;
+    len <<= 8;
+    len |= p[5];
+    *(u8 **)arg0 = p + 7;
+    len <<= 8;
+    len |= p[6];
+    *(u8 **)arg0 = p + 8;
+    len <<= 8;
+    len |= p[7];
+    hi = p[8];
+    {
+        u32 s = hi << 8;
+        s |= p[9];
+        if (s != 0) {
+            return -1;
+        }
+    }
+    hi = p[10];
+    {
+        u32 t = hi << 8;
+        t |= p[11];
+        if ((s16)t != 1) {
+            return -1;
+        }
+    }
+    hi = p[12];
+    {
+        u32 u = hi << 8;
+        u |= p[13];
+        div = (s16)u;
+    }
+    if (div & 0x8000) {
+        return -1;
+    }
+    *(u16 *)((char *)arg0 + 0x1E6) = div & 0x7FFF;
+    *(u8 **)arg0 += len;
+    return 0;
+}
 
 s32 func_800387C0(void *arg0) {
     u8 *p;