diff --git a/asm/non_matchings/code/z_collision_check/func_8005DD5C.s b/asm/non_matchings/code/z_collision_check/func_8005DD5C.s
index bf75dee3cf..ea71ff2eda 100644
--- a/asm/non_matchings/code/z_collision_check/func_8005DD5C.s
+++ b/asm/non_matchings/code/z_collision_check/func_8005DD5C.s
@@ -17,11 +17,6 @@ glabel D_8013ABDC
     # EUC-JP: インデックスがオーバして追加不能 | Index exceeded and cannot be added
     .balign 4
 
-glabel D_8013AC18
-    .asciz "CollisionCheck_setOCLine():インデックスがオーバして追加不能\n"
-    # EUC-JP: インデックスがオーバして追加不能 | Index exceeded and cannot be added
-    .balign 4
-
 .text
 glabel func_8005DD5C
 /* AD4EFC 8005DD5C 27BDFFE0 */  addiu $sp, $sp, -0x20
@@ -112,44 +107,3 @@ glabel func_8005DD5C
 /* AD5030 8005DE90 8FB10018 */  lw    $s1, 0x18($sp)
 /* AD5034 8005DE94 03E00008 */  jr    $ra
 /* AD5038 8005DE98 27BD0020 */   addiu $sp, $sp, 0x20
-
-/* AD503C 8005DE9C 27BDFFE8 */  addiu $sp, $sp, -0x18
-/* AD5040 8005DEA0 AFBF0014 */  sw    $ra, 0x14($sp)
-/* AD5044 8005DEA4 AFA40018 */  sw    $a0, 0x18($sp)
-/* AD5048 8005DEA8 AFA60020 */  sw    $a2, 0x20($sp)
-/* AD504C 8005DEAC 0C03034A */  jal   func_800C0D28
-/* AD5050 8005DEB0 AFA5001C */   sw    $a1, 0x1c($sp)
-/* AD5054 8005DEB4 24010001 */  li    $at, 1
-/* AD5058 8005DEB8 14410003 */  bne   $v0, $at, .L8005DEC8
-/* AD505C 8005DEBC 8FA7001C */   lw    $a3, 0x1c($sp)
-/* AD5060 8005DEC0 10000016 */  b     .L8005DF1C
-/* AD5064 8005DEC4 2402FFFF */   li    $v0, -1
-.L8005DEC8:
-/* AD5068 8005DEC8 8FA40018 */  lw    $a0, 0x18($sp)
-/* AD506C 8005DECC 8FA50020 */  lw    $a1, 0x20($sp)
-/* AD5070 8005DED0 0C0174E9 */  jal   func_8005D3A4
-/* AD5074 8005DED4 AFA7001C */   sw    $a3, 0x1c($sp)
-/* AD5078 8005DED8 8FA7001C */  lw    $a3, 0x1c($sp)
-/* AD507C 8005DEDC 3C048014 */  lui   $a0, %hi(D_8013AC18) # $a0, 0x8014
-/* AD5080 8005DEE0 8FAE0020 */  lw    $t6, 0x20($sp)
-/* AD5084 8005DEE4 8CE3028C */  lw    $v1, 0x28c($a3)
-/* AD5088 8005DEE8 28610003 */  slti  $at, $v1, 3
-/* AD508C 8005DEEC 14200005 */  bnez  $at, .L8005DF04
-/* AD5090 8005DEF0 00037880 */   sll   $t7, $v1, 2
-/* AD5094 8005DEF4 0C00084C */  jal   osSyncPrintf
-/* AD5098 8005DEF8 2484AC18 */   addiu $a0, %lo(D_8013AC18) # addiu $a0, $a0, -0x53e8
-/* AD509C 8005DEFC 10000007 */  b     .L8005DF1C
-/* AD50A0 8005DF00 2402FFFF */   li    $v0, -1
-.L8005DF04:
-/* AD50A4 8005DF04 00EFC021 */  addu  $t8, $a3, $t7
-/* AD50A8 8005DF08 AF0E0290 */  sw    $t6, 0x290($t8)
-/* AD50AC 8005DF0C 8CF9028C */  lw    $t9, 0x28c($a3)
-/* AD50B0 8005DF10 00601025 */  move  $v0, $v1
-/* AD50B4 8005DF14 27280001 */  addiu $t0, $t9, 1
-/* AD50B8 8005DF18 ACE8028C */  sw    $t0, 0x28c($a3)
-.L8005DF1C:
-/* AD50BC 8005DF1C 8FBF0014 */  lw    $ra, 0x14($sp)
-/* AD50C0 8005DF20 27BD0018 */  addiu $sp, $sp, 0x18
-/* AD50C4 8005DF24 03E00008 */  jr    $ra
-/* AD50C8 8005DF28 00000000 */   nop   
-
diff --git a/include/z64.h b/include/z64.h
index 5c17f63e91..47bb6fa5cd 100644
--- a/include/z64.h
+++ b/include/z64.h
@@ -784,8 +784,8 @@ typedef struct
     /* 0x0D0 */ Collider* colAc[60];
     /* 0x1C0 */ s32 colOcCount;
     /* 0x1C4 */ Collider* colOc[50];
-    /* 0x28C */ s32 unkCount;
-    /* 0x290 */ Collider* unk290[3];
+    /* 0x28C */ s32 colOcLineCount;
+    /* 0x290 */ Collider* colOcLine[3];
 
 } CollisionCheckContext; // size = 0x29C SubGlobalContext11E60
 
diff --git a/src/code/z_collision_check.c b/src/code/z_collision_check.c
index b504297b1f..bb2b8cb0c4 100644
--- a/src/code/z_collision_check.c
+++ b/src/code/z_collision_check.c
@@ -923,7 +923,12 @@ s32 func_8005D1E0(GlobalContext* globalCtx, Collider* collision)
 
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_collision_check/func_8005D334.s")
 
+s32 func_8005D3A4(GlobalContext* globalContext, UNK_PTR line);
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_collision_check/func_8005D3A4.s")
+//s32 func_8005D3A4(s32 arg0, void* arg1) {
+//    arg1->unk18 = (u16)(arg1->unk18 & 0xFFFE);
+//    return 1;
+//}
 
 void func_8005D40C(GlobalContext* globalCtx, CollisionCheckContext* check);
 void func_8005D3BC(GlobalContext* globalCtx, CollisionCheckContext* check) {
@@ -947,7 +952,7 @@ void func_8005D40C(GlobalContext* globalCtx, CollisionCheckContext* check) {
         check->colAtCount = 0;
         check->colAcCount = 0;
         check->colOcCount = 0;
-        check->unkCount = 0;
+        check->colOcLineCount = 0;
         for (c = check->colAt; c < check->colAt + 50; c++) {
             *c = NULL;
         }
@@ -960,7 +965,7 @@ void func_8005D40C(GlobalContext* globalCtx, CollisionCheckContext* check) {
             *c = NULL;
         }
 
-        for (c = check->unk290; c < check->unk290 + 3; c++) {
+        for (c = check->colOcLine; c < check->colOcLine + 3; c++) {
             *c = NULL;
         }
     }
@@ -1026,8 +1031,49 @@ s32 Actor_CollisionCheck_SetAT(GlobalContext* globalCtx, CollisionCheckContext*
     return index;
 }
 
+#ifdef NON_MATCHING
+//CollisionCheck_setAT_SAC()
+s32 func_8005D8AC(GlobalContext* globalCtx, CollisionCheckContext* check, Collider* collider, s32 index) {
+    s32 result;
 
+    if (collider->type >= 4) {
+        __assert("pcl_obj->data_type <= CL_DATA_LBL_SWRD", "../z_collision_check.c", 3037);
+    }
+    //index = (s32)index;
+    result = index;
+    if (func_800C0D28(globalCtx) == 1) {
+        return -1;
+    }
+    //index = temp_a3;
+    (*&D_8011DEF8[collider->type])(globalCtx, collider);
+    if (collider->actor != NULL) {
+        if (collider->actor->update == NULL) {
+            return -1;
+        }
+    }
+    if (check->unk2 & 1) {
+        if (index >= check->colAtCount) {
+            osSyncPrintf("CollisionCheck_setAT_SAC():全データ数より大きいところに登録しようとしている。\n");
+            //EUC-JP: 全データ数より大きいところに登録しようとしている。 | You are trying to register a location that is larger than the total number of data.
+            return -1;
+        }
+        result = index;
+        check->colAt[index] = collider;
+    }
+    else {
+        if (check->colAtCount >= 50) {
+            osSyncPrintf("CollisionCheck_setAT():インデックスがオーバーして追加不能\n");
+            return -1;
+        }
+        result = check->colAtCount;
+        check->colAt[check->colAtCount++] = collider;
+    }
+    return result;
+}
+
+#else
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_collision_check/func_8005D8AC.s")
+#endif // DEBUG
 
 s32 Actor_CollisionCheck_SetAC(GlobalContext* globalCtx, CollisionCheckContext* check, Collider* collider) {
     s32 index;
@@ -1092,6 +1138,23 @@ s32 Actor_CollisionCheck_SetOT(GlobalContext* globalCtx, CollisionCheckContext*
 
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_collision_check/func_8005DD5C.s")
 
+s32 func_8005DE9C(GlobalContext* globalCtx, CollisionCheckContext* check, UNK_PTR collider) {
+    s32 index;
+
+    if (func_800C0D28(globalCtx) == 1) {
+        return -1;
+    }
+    func_8005D3A4(globalCtx, collider);
+    if (check->colOcLineCount >= 3) {
+        osSyncPrintf("CollisionCheck_setOCLine():インデックスがオーバして追加不能\n");
+        return -1;
+    }
+    index = check->colOcLineCount;
+    check->colOcLine[check->colOcLineCount++] = collider;
+    return index;
+}
+
+
 s32 func_8005DF2C(ColliderBody* body) {
     if ((body->toucherFlags & 1) == 0) {
         return 1;