diff --git a/shell.nix b/shell.nix
index c611f0b..2198fbb 100644
--- a/shell.nix
+++ b/shell.nix
@@ -16,5 +16,6 @@ in pkgs.mkShell {
     glfw
     libGL
     clang_10
+    gdb
   ];
 }
diff --git a/src/pc/controller/controller_entry_point.c b/src/pc/controller/controller_entry_point.c
index faf91f5..a99b5e5 100644
--- a/src/pc/controller/controller_entry_point.c
+++ b/src/pc/controller/controller_entry_point.c
@@ -3,13 +3,14 @@
 
 #include "controller_recorded_tas.h"
 #include "controller_keyboard.h"
-
 #include "controller_sdl.h"
+#include "controller_tas_recorder.h"
 
 static struct ControllerAPI *controller_implementations[] = {
     &controller_recorded_tas,
-    &controller_sdl,
-    &controller_keyboard,
+    /* &controller_sdl, */
+    /* &controller_keyboard, */
+    /* &controller_tas_recorder, */
 };
 
 s32 osContInit(OSMesgQueue *mq, u8 *controllerBits, OSContStatus *status) {
diff --git a/src/pc/controller/controller_recorded_tas.c b/src/pc/controller/controller_recorded_tas.c
index c55c533..83b982b 100644
--- a/src/pc/controller/controller_recorded_tas.c
+++ b/src/pc/controller/controller_recorded_tas.c
@@ -23,7 +23,10 @@ static void tas_read(OSContPad *pad) {
     if (fd != 0) {
         uint8_t bytes[4] = {0};
         int result = read(fd, bytes, 4);
-        assert(result > 0);
+        if (result < 0) {
+            return;
+        }
+
         pad->button = (bytes[0] << 8) | bytes[1];
         pad->stick_x = bytes[2];
         pad->stick_y = bytes[3];
diff --git a/src/pc/controller/controller_tas_recorder.c b/src/pc/controller/controller_tas_recorder.c
new file mode 100644
index 0000000..d1c95a3
--- /dev/null
+++ b/src/pc/controller/controller_tas_recorder.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <ultra64.h>
+#include <assert.h>
+#include <fcntl.h>
+
+#include "controller_api.h"
+
+static FILE *fout;
+static int counter;
+
+#define OFFSET 0x400
+#define fname "rec.m64"
+
+static void tas_recorder_close(void) {
+  fclose(fout);
+}
+
+static void tas_recorder_init(void) {
+    if (fname == NULL) {
+        fout = NULL;
+        return;
+    }
+
+    unlink(fname);
+    printf("[tas_recorder] writing output to %s\n", fname);
+    fout = fopen(fname, "wb");
+    assert(fout != NULL);
+    uint8_t buf[OFFSET];
+    memset(buf, 0, sizeof(buf));
+    fwrite(buf, 1, sizeof(buf), fout);
+    atexit(tas_recorder_close);
+}
+
+static void tas_recorder_read(OSContPad *pad) {
+    if (fout == NULL) {
+        return;
+    }
+
+    uint8_t bytes[4] = {0};
+    int button1 = pad->button;
+    int button2 = pad->button;
+    bytes[0] = button1 >> 8;
+    bytes[1] = button2 & 0x00FF;
+    bytes[2] = pad->stick_x;
+    bytes[3] = pad->stick_y;
+    fwrite(bytes, 1, 4, fout);
+}
+
+struct ControllerAPI controller_tas_recorder = {
+    tas_recorder_init,
+    tas_recorder_read
+};
diff --git a/src/pc/controller/controller_tas_recorder.h b/src/pc/controller/controller_tas_recorder.h
new file mode 100644
index 0000000..8ceccf8
--- /dev/null
+++ b/src/pc/controller/controller_tas_recorder.h
@@ -0,0 +1,8 @@
+#ifndef CONTROLLER_TAS_RECORDER_H
+#define CONTROLLER_TAS_RECORDER_H
+
+#include "controller_api.h"
+
+extern struct ControllerAPI controller_tas_recorder;
+
+#endif