diff --git a/include/functions.h b/include/functions.h
index c29dc246d7..364073459b 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -2129,8 +2129,8 @@ void func_80121FC4(GlobalContext* globalCtx);
 Path* Path_GetByIndex(GlobalContext* globalCtx, s16 index, s16 max);
 f32 Path_OrientAndGetDistSq(Actor* actor, Path* path, s16 waypoint, s16* yaw);
 void Path_CopyLastPoint(Path* path, Vec3f* dest);
-// void func_80122660(void);
-// UNK_TYPE4 func_80122670(s32* param_1, Input* input);
+void FrameAdvance_Init(FrameAdvanceContext* frameAdvCtx);
+s32 FrameAdvance_Update(FrameAdvanceContext* frameAdvCtx, Input* input);
 // void func_801226E0(void);
 void func_80122744(GlobalContext* globalCtx, UNK_PTR arg1, u32 arg2, Vec3s* arg3);
 s32 func_80122760(GlobalContext* globalCtx, UNK_PTR arg1, f32 arg2);
diff --git a/src/code/z_pause.c b/src/code/z_pause.c
index 44be6238af..bb5b33cf2f 100644
--- a/src/code/z_pause.c
+++ b/src/code/z_pause.c
@@ -1,5 +1,39 @@
+/*
+ * File: z_pause.c
+ * Description: Frame Advance debug feature
+ *
+ * This allows you to advance through the game one frame at a time on command.
+ * To advance a frame, hold Z and press R on the specified controller (see z_play).
+ * Holding Z and R will advance a frame every half second.
+ *
+ * Note: While the system is fully hooked up, there is no way to enable it in game
+ * Instead one would have to add something like:
+ *
+ * if (CHECK_BTN_ALL(input->cur.button, BTN_R) && CHECK_BTN_ALL(input->press.button, BTN_DDOWN)) {
+ *     frameAdvCtx->enabled = !frameAdvCtx->enabled;
+ * }
+ *
+ * to the start of FrameAdvance_Update, which would allow the system to be toggled on and off by holding R
+ * and pressing Dpad Down on the specified controller.
+ *
+ * Note2: Controllers 2-4's inputs are normally zeroed out, so this would also need to be fixed to use frame advance
+ */
 #include "global.h"
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_pause/func_80122660.s")
+void FrameAdvance_Init(FrameAdvanceContext* frameAdvCtx) {
+    frameAdvCtx->timer = 0;
+    frameAdvCtx->enabled = false;
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_pause/func_80122670.s")
+/*
+ * Returns true when frame advance is not active (game will run normally)
+ */
+s32 FrameAdvance_Update(FrameAdvanceContext* frameAdvCtx, Input* input) {
+    if (!frameAdvCtx->enabled || (CHECK_BTN_ALL(input->cur.button, BTN_Z) &&
+                                  (CHECK_BTN_ALL(input->press.button, BTN_R) ||
+                                   (CHECK_BTN_ALL(input->cur.button, BTN_R) && (++frameAdvCtx->timer >= 9))))) {
+        frameAdvCtx->timer = 0;
+        return true;
+    }
+    return false;
+}
diff --git a/tools/disasm/functions.txt b/tools/disasm/functions.txt
index 79a254d428..642970ff4e 100644
--- a/tools/disasm/functions.txt
+++ b/tools/disasm/functions.txt
@@ -2170,8 +2170,8 @@
     0x801224E0:("Path_GetByIndex",),
     0x80122524:("Path_OrientAndGetDistSq",),
     0x801225CC:("Path_CopyLastPoint",),
-    0x80122660:("func_80122660",),
-    0x80122670:("func_80122670",),
+    0x80122660:("FrameAdvance_Init",),
+    0x80122670:("FrameAdvance_Update",),
     0x801226E0:("func_801226E0",),
     0x80122744:("func_80122744",),
     0x80122760:("func_80122760",),