diff --git a/src/devices/audio.h b/src/devices/audio.h
index 288b291..49ca8db 100644
--- a/src/devices/audio.h
+++ b/src/devices/audio.h
@@ -25,7 +25,7 @@ typedef struct {
 
 extern Audio audio[POLYPHONY];
 
+Uint8 audio_get_vu(Audio *c);
 int audio_render(Audio *c, Sint16 *sample, Sint16 *end);
 void audio_start(Audio *c, Uint16 adsr, Uint8 pitch);
-Uint8 audio_get_vu(Audio *c);
 void audio_finished_handler(Audio *c);
\ No newline at end of file
diff --git a/src/devices/file.c b/src/devices/file.c
index e5c93b2..4a11821 100644
--- a/src/devices/file.c
+++ b/src/devices/file.c
@@ -139,7 +139,7 @@ file_delete(void)
 	return unlink(current_filename);
 }
 
-/* API */
+/* IO */
 
 void
 file_deo(Device *d, Uint8 port)
diff --git a/src/devices/screen.c b/src/devices/screen.c
index 0406595..155eac8 100644
--- a/src/devices/screen.c
+++ b/src/devices/screen.c
@@ -154,7 +154,7 @@ screen_debug(Screen *p, Uint8 *stack, Uint8 wptr, Uint8 rptr, Uint8 *memory)
 	}
 }
 
-/* APIs */
+/* IO */
 
 Uint8
 screen_dei(Device *d, Uint8 port)
@@ -174,7 +174,7 @@ screen_deo(Device *d, Uint8 port)
 	switch(port) {
 	case 0x1: d->vector = peek16(d->dat, 0x0); break;
 	case 0x5:
-		/* TODO: if(!FIXED_SIZE) set_size(peek16(d->dat, 0x2), peek16(d->dat, 0x4), 1); */
+		if(!FIXED_SIZE) set_size(peek16(d->dat, 0x2), peek16(d->dat, 0x4), 1);
 		break;
 	case 0xe: {
 		Uint16 x = peek16(d->dat, 0x8);
diff --git a/src/devices/screen.h b/src/devices/screen.h
index 75ce96a..b608a80 100644
--- a/src/devices/screen.h
+++ b/src/devices/screen.h
@@ -27,6 +27,9 @@ typedef struct Screen {
 
 extern Screen screen;
 
+/* this should probably be done differently */
+int set_size(Uint16 width, Uint16 height, int is_resize);
+
 void screen_palette(Screen *p, Uint8 *addr);
 void screen_resize(Screen *p, Uint16 width, Uint16 height);
 void screen_clear(Screen *p, Layer *layer);
diff --git a/src/uxnemu.c b/src/uxnemu.c
index a852271..f6cc587 100644
--- a/src/uxnemu.c
+++ b/src/uxnemu.c
@@ -101,7 +101,7 @@ set_window_size(SDL_Window *window, int w, int h)
 	SDL_SetWindowSize(window, w, h);
 }
 
-static int
+int
 set_size(Uint16 width, Uint16 height, int is_resize)
 {
 	screen_resize(&screen, width, height);