turbo_mode.patch

diff --git a/machine.c b/machine.c
index 1a33176b..2441cf6c 100644
--- a/machine.c
+++ b/machine.c
@@ -377,7 +377,7 @@ machine_set_const_timings( fuse_machine_info *machine )
   /* Pull timings we use repeatedly out of libspectrum and store them
      for ourself */
   machine->timings.processor_speed =
-    libspectrum_timings_processor_speed( machine->machine );
+    libspectrum_timings_processor_speed( machine->machine ) * 2;
   machine->timings.left_border =
     libspectrum_timings_left_border( machine->machine );
   machine->timings.horizontal_screen =
@@ -385,11 +385,11 @@ machine_set_const_timings( fuse_machine_info *machine )
   machine->timings.right_border =
     libspectrum_timings_right_border( machine->machine );
   machine->timings.tstates_per_line =
-    libspectrum_timings_tstates_per_line( machine->machine );
+    libspectrum_timings_tstates_per_line( machine->machine ) * 2;
   machine->timings.interrupt_length =
-    libspectrum_timings_interrupt_length( machine->machine );
+    libspectrum_timings_interrupt_length( machine->machine ) * 2;
   machine->timings.tstates_per_frame =
-    libspectrum_timings_tstates_per_frame( machine->machine );
+    libspectrum_timings_tstates_per_frame( machine->machine ) * 2;
 }
 
 static void
diff --git a/peripherals/ula.h b/peripherals/ula.h
index ce11bd56..bb88a409 100644
--- a/peripherals/ula.h
+++ b/peripherals/ula.h
@@ -24,7 +24,7 @@
 #ifndef FUSE_ULA_H
 #define FUSE_ULA_H
 
-#define ULA_CONTENTION_SIZE 80000
+#define ULA_CONTENTION_SIZE 160000
 
 /* How much contention do we get at every tstate when MREQ is active? */
 extern libspectrum_byte ula_contention[ ULA_CONTENTION_SIZE ];
diff --git a/sound.c b/sound.c
index b46da0ab..3e2ede07 100644
--- a/sound.c
+++ b/sound.c
@@ -418,7 +418,7 @@ ay_do_tone( int level, unsigned int tone_count, int *var, int chan )
 #define AY_CLOCK_DIVISOR 16
 /* all Spectrum models and clones with an AY seem to count down the
    master clock by 2 to drive the AY */
-#define AY_CLOCK_RATIO 2
+#define AY_CLOCK_RATIO 4
 
 static void
 sound_ay_overlay( void )