this fixes a clipping issue with littlerb and megaphx, although I need to check if anything else is adversely affected by the change (nw)

src/emu/cpu/tms34010/34010gfx.c

@@ -10,7 +10,7 @@
 #ifndef RECURSIVE_INCLUDE
 
 
-#define LOG_GFX_OPS 0
+#define LOG_GFX_OPS 1
 #define LOGGFX(x) do { if (LOG_GFX_OPS && tms->device->machine().input().code_pressed(KEYCODE_L)) logerror x; } while (0)
 
 
@@ -109,9 +109,11 @@ static int apply_window(tms34010_state *tms, const char *inst_name,int srcbpp, U
 		/* clip Y */
 		diff = WSTART_Y(tms) - sy;
 		if (diff > 0)
-		{
+		{	
+#if 0 // littlerb and megaphx do not work correctly with this enabled, see items dropping into playfield from top
 			if (srcaddr)
 				*srcaddr += diff * SPTCH(tms);
+#endif
 			sy += diff;
 			SET_V_LOG(tms, 1);
 		}

src/mame/drivers/megaphx.c

@@ -22,9 +22,6 @@
  I/O:
   - port_c_r / port_c_w should go through the 8255 but I don't see how to hook them up that way? various bits of the writes are lost?
 
-  Misc:
-  - some of the large phoenix graphics during stages 3/4 are corrupt for a frame when they re-enter at the top of the screen, possible original game bug?
-  
   
   --