diff --git a/all.h b/all.h
index 364aff9..267d8f9 100644
--- a/all.h
+++ b/all.h
@@ -643,7 +643,7 @@ fn void   osDebugPrint(bool debug_mode, const char* format, ...);
 TermIOs   osStartTUI(bool blocking);
 fn void   osEndTUI(TermIOs old_terminal_attributes);
 fn Dim2   osGetTerminalDimensions();
-void      osBlitToTerminal(ptr writeable_output_ansi_string, i64 count);
+void      osBlitToTerminal(ptr writeable_output_ansi_string, u64 count);
 void      osReadConsoleInput(u8* buffer, u32 len);
 
 // network stuff
diff --git a/mac_os.c b/mac_os.c
index f8c294e..d8aea68 100644
--- a/mac_os.c
+++ b/mac_os.c
@@ -37,121 +37,6 @@ fn void osSleepMicroseconds(u32 t) {
   usleep(t);
 }
 
-// Files
-fn bool osFileExists(String filename) {
-  bool result = access((str)filename.bytes, F_OK) == 0;
-  return result;
-}
-
-fn String osFileRead(Arena* arena, ptr filepath) {
-  struct stat st;
-  stat(filepath, &st);
-  String result = { st.st_size, st.st_size, 0 };
-  result.bytes = arenaAlloc(arena, st.st_size);
-
-  size_t handle = open(filepath, O_RDWR, S_IRUSR | S_IRGRP | S_IROTH);
-  read(handle, result.bytes, st.st_size);
-  close(handle);
-
-  return result;
-}
-
-fn bool osFileCreate(String filename) {
-  /*
-  M_Scratch scratch = scratch_get();
-  string nt = str_copy(&scratch.arena, filename);
-  bool result = true;
-  size_t handle = open((const char*) nt.str, O_RDWR | O_CREAT, S_IRUSR | S_IRGRP | S_IROTH);
-  if (handle == -1) {
-      result = false;
-  }
-  scratch_return(&scratch);
-  close(handle);
-  return true;
-  */
-  bool result = true;
-  size_t handle = open((str)filename.bytes, O_RDWR | O_CREAT, S_IRUSR | S_IRGRP | S_IROTH);
-  if (handle == -1) {
-    result = false;
-  }
-  if (close(handle) == -1) {
-    result = false;
-  }
-  return result;
-}
-
-fn bool osFileCreateWrite(String filename, String data) {
-  /*
-  M_Scratch scratch = scratch_get();
-  string nt = str_copy(&scratch.arena, filename);
-  b32 result = true;
-  size_t handle =
-    open((const char*) nt.str, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
-  if (handle == -1) result = false;
-  write(handle, data.str, data.size);
-  close(handle);
-  scratch_return(&scratch);
-  return result;
-  */
-  bool result = true;
-  size_t handle = open(
-    (str)filename.bytes,
-    O_RDWR | O_CREAT | O_TRUNC,
-    S_IRUSR | S_IRGRP | S_IROTH
-  );
-  if (handle == -1) result = false;
-  write(handle, data.bytes, data.length);
-  close(handle);
-  return result;
-}
-
-fn bool osFileWrite(String filename, String data) {
-  /*
-    M_Scratch scratch = scratch_get();
-    string nt = str_copy(&scratch.arena, filename);
-    b32 result = true;
-    size_t handle =
-        open((const char*) nt.str, O_RDWR | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
-    if (handle == -1) result = false;
-    write(handle, data.str, data.size);
-    close(handle);
-  */
-  bool result = true;
-  size_t handle = open((str) filename.bytes, O_RDWR | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
-  if (handle == -1) result = false;
-  write(handle, data.bytes, data.length);
-  close(handle);
-  return result;
-}
-
-fn Resulti64 osFileOpenForWriting(String filename) {
-  size_t handle = open((str)filename.bytes, O_WRONLY | O_APPEND, S_IRUSR | S_IRGRP | S_IROTH);
-  Resulti64 result = {
-    .success = handle != -1,
-    .value = (i64)handle,
-  };
-  return result;
-}
-
-fn Resulti64 osFileClose(Resulti64 handle) {
-  i32 close_result = close((size_t)handle.value);
-  Resulti64 result = {
-    .success = close_result != -1,
-    .value = (i64)close_result,
-  };
-  return result;
-}
-
-fn bool osFileWriteOpenFile(Resulti64 handle, String data) {
-  assert(handle.success == true);
-  i32 wrote_this_round = 0;
-  for (i32 bytes_written = 0; bytes_written < data.length; bytes_written += wrote_this_round) {
-    wrote_this_round = write((size_t)handle.value, data.bytes + bytes_written, data.length - bytes_written);
-    if (wrote_this_round == -1) return false;
-  }
-  return true;
-}
-
 // Misc
 fn void osDebugPrint(bool debug_mode, const char * format, ... ) {
   if (debug_mode) {
diff --git a/unix_os.c b/unix_os.c
index ad6b599..458df0a 100644
--- a/unix_os.c
+++ b/unix_os.c
@@ -99,7 +99,7 @@ fn Dim2 osGetTerminalDimensions() {
   return result;
 }
 
-void osBlitToTerminal(ptr writeable_output_ansi_string, i64 count) {
+void osBlitToTerminal(ptr writeable_output_ansi_string, u64 count) {
   int flags = fcntl(STDOUT_FILENO, F_GETFL);
   fcntl(STDOUT_FILENO, F_SETFL, flags & ~O_NONBLOCK);
 
@@ -157,3 +157,119 @@ i32 osLanIPAddress() { // returns as HOST byte-order
   }
   return result;
 }
+
+// Files
+fn bool osFileExists(String filename) {
+  bool result = access((str)filename.bytes, F_OK) == 0;
+  return result;
+}
+
+fn String osFileRead(Arena* arena, ptr filepath) {
+  struct stat st;
+  stat(filepath, &st);
+  String result = { st.st_size, st.st_size, 0 };
+  result.bytes = arenaAlloc(arena, st.st_size);
+
+  size_t handle = open(filepath, O_RDWR, S_IRUSR | S_IRGRP | S_IROTH);
+  read(handle, result.bytes, st.st_size);
+  close(handle);
+
+  return result;
+}
+
+fn bool osFileCreate(String filename) {
+  /*
+  M_Scratch scratch = scratch_get();
+  string nt = str_copy(&scratch.arena, filename);
+  bool result = true;
+  size_t handle = open((const char*) nt.str, O_RDWR | O_CREAT, S_IRUSR | S_IRGRP | S_IROTH);
+  if (handle == -1) {
+      result = false;
+  }
+  scratch_return(&scratch);
+  close(handle);
+  return true;
+  */
+  bool result = true;
+  size_t handle = open((str)filename.bytes, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+  if (handle == -1) {
+    result = false;
+  }
+  if (close(handle) == -1) {
+    result = false;
+  }
+  return result;
+}
+
+fn bool osFileCreateWrite(String filename, String data) {
+  /*
+  M_Scratch scratch = scratch_get();
+  string nt = str_copy(&scratch.arena, filename);
+  b32 result = true;
+  size_t handle =
+    open((const char*) nt.str, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
+  if (handle == -1) result = false;
+  write(handle, data.str, data.size);
+  close(handle);
+  scratch_return(&scratch);
+  return result;
+  */
+  bool result = true;
+  size_t handle = open(
+    (str)filename.bytes,
+    O_RDWR | O_CREAT | O_TRUNC,
+    S_IRUSR | S_IRGRP | S_IROTH
+  );
+  if (handle == -1) result = false;
+  write(handle, data.bytes, data.length);
+  close(handle);
+  return result;
+}
+
+fn bool osFileWrite(String filename, String data) {
+  /*
+    M_Scratch scratch = scratch_get();
+    string nt = str_copy(&scratch.arena, filename);
+    b32 result = true;
+    size_t handle =
+        open((const char*) nt.str, O_RDWR | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
+    if (handle == -1) result = false;
+    write(handle, data.str, data.size);
+    close(handle);
+  */
+  bool result = true;
+  size_t handle = open((str) filename.bytes, O_RDWR | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
+  if (handle == -1) result = false;
+  write(handle, data.bytes, data.length);
+  close(handle);
+  return result;
+}
+
+fn Resulti64 osFileOpenForWriting(String filename) {
+  size_t handle = open((str)filename.bytes, O_WRONLY | O_APPEND, S_IRUSR | S_IRGRP | S_IROTH);
+  Resulti64 result = {
+    .success = handle != -1,
+    .value = (i64)handle,
+  };
+  return result;
+}
+
+fn Resulti64 osFileClose(Resulti64 handle) {
+  i32 close_result = close((size_t)handle.value);
+  Resulti64 result = {
+    .success = close_result != -1,
+    .value = (i64)close_result,
+  };
+  return result;
+}
+
+fn bool osFileWriteOpenFile(Resulti64 handle, String data) {
+  assert(handle.success == true);
+  i32 wrote_this_round = 0;
+  for (i32 bytes_written = 0; bytes_written < data.length; bytes_written += wrote_this_round) {
+    wrote_this_round = write((size_t)handle.value, data.bytes + bytes_written, data.length - bytes_written);
+    if (wrote_this_round == -1) return false;
+  }
+  return true;
+}
+
diff --git a/win32_os.c b/win32_os.c
index 5713792..75c7917 100644
--- a/win32_os.c
+++ b/win32_os.c
@@ -198,7 +198,7 @@ fn Dim2 osGetTerminalDimensions() {
   return result;
 }
 
-void osBlitToTerminal(ptr writeable_output_ansi_string, i64 count) {
+void osBlitToTerminal(ptr writeable_output_ansi_string, u64 count) {
 	HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
 	DWORD written;
 	WriteConsole(hStdout, writeable_output_ansi_string, count, &written, NULL);