diff -Nru sourceold/src/mame/drivers/cischeat.c source/src/mame/drivers/cischeat.c
--- sourceold/src/mame/drivers/cischeat.c	2008-10-03 07:05:16.000000000 +0200
+++ source/src/mame/drivers/cischeat.c	2008-11-23 17:53:49.000000000 +0100
@@ -1876,8 +1876,9 @@
 	MDRV_CPU_MODIFY("sound")
 	MDRV_CPU_PROGRAM_MAP(f1gpstr2_sound_readmem,f1gpstr2_sound_writemem)
 
-	MDRV_CPU_ADD("cpu5", M68000, 10000000)
+	MDRV_CPU_ADD("cpu5", M68000, 12000000)
 	MDRV_CPU_PROGRAM_MAP(f1gpstr2_io_readmem,f1gpstr2_io_writemem)
+	MDRV_CPU_VBLANK_INT("main", irq4_line_hold)
 MACHINE_DRIVER_END