diff --git a/libretro.c b/libretro.c
index 0c455be..876b535 100644
--- a/libretro.c
+++ b/libretro.c
@@ -429,22 +429,16 @@ static uint64_t video_frames, audio_frames;
 static void Emulate(EmulateSpecStruct *espec,
       int skip_frame, int update_sample_rate)
 {
-   static MDFN_Rect rects[FB_MAX_HEIGHT];
    uint16 butt_data;
 
-   rects[0].w = ~0;
-
    espec->surface          = surf;
    espec->DisplayRect.x    = 0;
    espec->DisplayRect.y    = 0;
    espec->DisplayRect.w    = 224;
    espec->DisplayRect.h    = 144;
-   espec->LineWidths       = rects;
    espec->skip             = skip_frame;
    espec->SoundBufSize     = 0;
-   espec->SoundBufSizeALMS = 0;
    espec->MasterCycles     = 0;
-   espec->MasterCyclesALMS = 0;
 
    if (update_sample_rate)
       WSwan_SetSoundRate(RETRO_SAMPLE_RATE);
diff --git a/mednafen/git.h b/mednafen/git.h
index 569ac75..9703d33 100644
--- a/mednafen/git.h
+++ b/mednafen/git.h
@@ -104,44 +104,20 @@ typedef struct
 	// The framebuffer pointed to by surface->pixels is written to by the system emulation code.
 	MDFN_Surface *surface;
 
-	// Will be set to TRUE if the video pixel format has changed since the last call to Emulate(), FALSE otherwise.
-	// Will be set to TRUE on the first call to the Emulate() function/method
-	bool VideoFormatChanged;
-
 	// Set by the system emulation code every frame, to denote the horizontal and vertical offsets of the image, and the size
 	// of the image.  If the emulated system sets the elements of LineWidths, then the horizontal offset(x) and width(w) of this structure
 	// are ignored while drawing the image.
 	MDFN_Rect DisplayRect;
 
-	// Pointer to an array of MDFN_Rect, number of elements = fb_height, set by the driver code.  Individual MDFN_Rect structs written
-	// to by system emulation code.  If the emulated system doesn't support multiple screen widths per frame, or if you handle
-	// such a situation by outputting at a constant width-per-frame that is the least-common-multiple of the screen widths, then
-	// you can ignore this.  If you do wish to use this, you must set all elements every frame.
-	MDFN_Rect *LineWidths;
-
 	// Skip rendering this frame if true.  Set by the driver code.
 	int skip;
 
-	//
-	// If sound is disabled, the driver code must set SoundRate to false, SoundBuf to NULL, SoundBufMaxSize to 0.
-
-        // Will be set to TRUE if the sound format(only rate for now, at least) has changed since the last call to Emulate(), FALSE otherwise.
-        // Will be set to TRUE on the first call to the Emulate() function/method
-	bool SoundFormatChanged;
-
-	// Maximum size of the sound buffer, in frames.  Set by the driver code.
-	int32 SoundBufMaxSize;
-
 	// Number of frames currently in internal sound buffer.  Set by the system emulation code, to be read by the driver code.
 	int32 SoundBufSize;
-	int32 SoundBufSizeALMS;	// SoundBufSize value at last MidSync(), 0
-				// if mid sync isn't implemented for the emulation module in use.
 
 	// Number of cycles that this frame consumed, using MDFNGI::MasterClock as a time base.
 	// Set by emulation code.
 	int64 MasterCycles;
-	int64 MasterCyclesALMS;	// MasterCycles value at last MidSync(), 0
-				// if mid sync isn't implemented for the emulation module in use.
 } EmulateSpecStruct;
 
 #define MDFN_MASTERCLOCK_FIXED(n)	((int64)((double)(n) * (1LL << 32)))