diff --git a/include/functions.h b/include/functions.h
index 6e8b78e939..747e604c33 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -316,7 +316,7 @@ OSId osGetThreadId(OSThread* t);
 void osSpTaskYield(void);
 s32 __osPfsGetNextPage(OSPfs* param_1, __OSInode* param_2, u8 param_3, u8 param_4);
 s32 osPfsReadWriteFile(OSPfs* pfs, s32 file_no, u8 flag, s32 offset, s32 size_in_bytes, u8* data_buffer);
-// void __osPfsGetStatus(void);
+s32 __osPfsGetStatus(OSMesgQueue* queue, s32 channel);
 // void __osPfsRequestOneChannel(void);
 // void __osPfsGetOneChannelData(void);
 void guMtxIdentF(float mf[4][4]);
@@ -346,7 +346,7 @@ s32 __osPfsRWInode(OSPfs* pfs, __OSInode* inode, u8 flag, u8 bank);
 u32 osGetCount(void);
 void guMtxL2F(MtxF* m1, Mtx* m2);
 u32 osGetMemSize(void);
-// void osPfsFindFile(UNK_TYPE1 param_1, UNK_TYPE1 param_2, UNK_TYPE1 param_3, UNK_TYPE1 param_4, UNK_TYPE4 param_5, UNK_TYPE4 param_6);
+s32 osPfsFindFile(OSPfs* pfs, u16 companyCode, u32 gameCode, u8* gameName, u8* extName, s32* fileNo);
 void osSetEventMesg(OSEvent e, OSMesgQueue* mq, OSMesg m);
 f32 sqrtf(f32 __x);
 s32 osAfterPreNMI(void);
diff --git a/src/libultra/io/pfssearchfile.c b/src/libultra/io/pfssearchfile.c
index 572e3d0a78..c5f8bcce46 100644
--- a/src/libultra/io/pfssearchfile.c
+++ b/src/libultra/io/pfssearchfile.c
@@ -1,3 +1,52 @@
 #include "global.h"
 
-#pragma GLOBAL_ASM("asm/non_matchings/boot/pfssearchfile/osPfsFindFile.s")
+s32 osPfsFindFile(OSPfs* pfs, u16 companyCode, u32 gameCode, u8* gameName, u8* extName, s32* fileNo) {
+    s32 j;
+    s32 i;
+    __OSDir dir;
+    s32 ret = 0;
+    s32 err;
+
+    if (!(pfs->status & PFS_INITIALIZED)) {
+        return PFS_ERR_INVALID;
+    }
+
+    if ((ret = __osCheckId(pfs)) != 0) {
+        return ret;
+    }
+
+    for (j = 0; j < pfs->dir_size; j++) {
+        if ((ret = __osContRamRead(pfs->queue, pfs->channel, pfs->dir_table + j, (u8*)&dir)) != 0) {
+            return ret;
+        }
+        if ((ret = __osPfsGetStatus(pfs->queue, pfs->channel)) != 0) {
+            return ret;
+        }
+
+        if ((dir.company_code == companyCode) && (dir.game_code == gameCode)) {
+            err = 0;
+            if (gameName != 0) {
+                for (i = 0; i < PFS_FILE_NAME_LEN; i++) {
+                    if (dir.game_name[i] != gameName[i]) {
+                        err = 1;
+                        break;
+                    }
+                }
+            }
+            if ((extName != 0) && (err == 0)) {
+                for (i = 0; i < PFS_FILE_EXT_LEN; i++) {
+                    if (dir.ext_name[i] != extName[i]) {
+                        err = 1;
+                        break;
+                    }
+                }
+            }
+            if (err == 0) {
+                *fileNo = j;
+                return ret;
+            }
+        }
+    }
+    *fileNo = -1;
+    return PFS_ERR_INVALID;
+}