#ifndef __TIMING_H__
#define __TIMING_H__
-#include "types.h"
-
-// Note that these are NTSC timings:
-
-//#define RISC_CYCLE_IN_USEC 0.03760684198
-//#define M68K_CYCLE_IN_USEC (RISC_CYCLE_IN_USEC * 2)
-//#define HORIZ_PERIOD_IN_USEC 63.5555
-//#define M6502_CYCLE_IN_USEC 0.9765625
-
-//#define MASTER_CLOCK (12000000)
-//#define SOUND_CLOCK (3579000)
-// MDRV_CPU_ADD("maincpu", M6809, MASTER_CLOCK/3/4)
-// MDRV_CPU_PROGRAM_MAP(defender_map)
-// MDRV_CPU_ADD("soundcpu", M6808, SOUND_CLOCK)
-// MDRV_CPU_PROGRAM_MAP(defender_sound_map)
-
+// Even though it's driven at 4 MHz, internally it runs at 1/4 that speed
#define M6808_CLOCK_SPEED_IN_HZ (3579000.0 / 4.0)
#define M6809_CLOCK_SPEED_IN_HZ (1000000.0)
-// Actually, it's 1.1176306230790722 usec
-//#define M6808_CYCLE_IN_USEC (0.9765625)
#define M6808_CYCLE_IN_USEC (1000000.0 / M6808_CLOCK_SPEEK_IN_HZ)
#define M6809_CYCLE_IN_USEC (1000000.0 / M6809_CLOCK_SPEED_IN_HZ)
-//#define USEC_TO_RISC_CYCLES(u) (uint32)(((u) / RISC_CYCLE_IN_USEC) + 0.5)
-//#define USEC_TO_M68K_CYCLES(u) (uint32)(((u) / M68K_CYCLE_IN_USEC) + 0.5)
-//#define USEC_TO_M6502_CYCLES(u) (uint32)(((u) / M6502_CYCLE_IN_USEC) + 0.5)
#define USEC_TO_M6808_CYCLES(u) (uint32)(((u) / M6808_CYCLE_IN_USEC) + 0.5)
#define USEC_TO_M6809_CYCLES(u) (uint32)(((u) / M6809_CYCLE_IN_USEC) + 0.5)