--- uae/src/include/drawing.h	2018/04/24 16:43:44	1.1.1.2
+++ uae/src/include/drawing.h	2018/04/24 16:45:11	1.1.1.3
@@ -15,7 +15,7 @@
  * This doesn't work very well
  */
 
-/* #define EMULATE_AGA */
+#undef EMULATE_AGA
 
 #ifndef EMULATE_AGA
 #define AGA_CHIPSET 0
@@ -129,6 +129,9 @@ struct decision {
 #endif
 };
 
+/* Compute the number of bitplanes from a value written to BPLCON0  */
+#define GET_PLANES(x) ((((x) >> 12) & 7) | (((x) & 0x10) >> 1))
+
 /* Anything related to changes in hw registers during the DDF for one
  * line. */
 struct draw_info {
@@ -178,3 +181,23 @@ extern int thisframe_first_drawn_line, t
 extern uae_u16 clxdat, clxcon;
 extern int clx_sprmask;
 extern int diwfirstword,diwlastword;
+
+#define IHF_SCROLLLOCK 0
+#define IHF_QUIT_PROGRAM 1
+#define IHF_PICASSO 2
+#define IHF_SOUNDADJUST 3
+
+extern int inhibit_frame;
+
+static __inline__ void set_inhibit_frame (int bit)
+{
+    inhibit_frame |= 1 << bit;
+}
+static __inline__ void clear_inhibit_frame (int bit)
+{
+    inhibit_frame &= ~(1 << bit);
+}
+static __inline__ void toggle_inhibit_frame (int bit)
+{
+    inhibit_frame ^= ~(1 << bit);
+}