#ifndef Z80_H_
#define Z80_H_

#include "cpuintrf.h"


enum
{
  Z80_PC, Z80_SP,
  Z80_A, Z80_B, Z80_C, Z80_D, Z80_E, Z80_H, Z80_L,
  Z80_AF, Z80_BC, Z80_DE, Z80_HL,
  Z80_IX, Z80_IY,  Z80_AF2, Z80_BC2, Z80_DE2, Z80_HL2,
  Z80_R, Z80_I, Z80_IM, Z80_IFF1, Z80_IFF2, Z80_HALT,
  Z80_DC0, Z80_DC1, Z80_DC2, Z80_DC3, Z80_WZ
};

enum {
  Z80_TABLE_op,
  Z80_TABLE_cb,
  Z80_TABLE_ed,
  Z80_TABLE_xy,
  Z80_TABLE_xycb,
  Z80_TABLE_ex  /* cycles counts for taken jr/jp/call and interrupt latency (rst opcodes) */
};
#define Z80_TABLE_dd  Z80_TABLE_xy
#define Z80_TABLE_fd  Z80_TABLE_xy

/****************************************************************************/
/* The Z80 registers. HALT is set to 1 when the CPU is halted, the refresh  */
/* register is calculated as follows: refresh=(Z80.r&127)|(Z80.r2&128)      */
/****************************************************************************/
typedef struct
{
  PAIR  pc,sp,af,bc,de,hl,ix,iy,wz;
  PAIR  af2,bc2,de2,hl2;

  UINT8 r;
  UINT8 r2;
  UINT8 iff1;
  UINT8 iff2;

  UINT8 halt;
  UINT8 im;
  UINT8 i;
  UINT8  nmi_state;      /* nmi line state */

  UINT8  nmi_pending;    /* nmi pending */
  UINT8  irq_state;      /* irq line state */
  UINT8  after_ei;      /* are we in the EI shadow? */

  const struct z80_irq_daisy_chain *daisy;
  int    (*irq_callback)(int irqline);

  UINT8 (*mem_read)(UINT16 address);
  void (*mem_write)(UINT16 address, UINT8 data);

  void (*port_write)(UINT16 port, UINT8 data);
  UINT8 (*port_read)(UINT16 port);
} Z80_Regs;


extern int z80_cycle_count;
extern Z80_Regs Z80;

extern unsigned char *cpu_readmap[64];
extern unsigned char *cpu_writemap[64];

void z80_init(int index, int clock, const void *config, int (*irq_callback)(int));
void z80_reset (void);
void z80_exit (void);
int z80_execute(int cycles);
void z80_burn(int cycles);
void z80_get_context (void *dst);
void z80_set_context (void *src);
void z80_set_irq_line(int irqline, int state);
void z80_reset_cycle_count(void);
int z80_get_elapsed_cycles(void);

#endif
