#ifndef Z80_H_
#define Z80_H_

#include "cpuintrf.h"

enum {
	Z80_PC=1, 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
};

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) */
};

/****************************************************************************/
/* 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	prvpc,pc,sp,af,bc,de,hl,ix,iy;
	PAIR	af2,bc2,de2,hl2;
	UINT8	r,r2,iff1,iff2,halt,im,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);
}	Z80_Regs;


extern int z80_ICount;
extern Z80_Regs Z80;

void z80_init(int index, int clock, const void *config, int (*irqcallback)(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);

unsigned int cpu_readport16(unsigned int port);
void cpu_writeport16(unsigned int port, unsigned int data);
unsigned int cpu_readmem16(unsigned int address);
void cpu_writemem16(unsigned int address, unsigned int data);

#endif