/* ASG 971222 -- rewrote this interface */
#ifndef __NECITRF_H_
#define __NECITRF_H_

typedef enum { ES, CS, SS, DS } SREGS;
typedef enum { AW, CW, DW, BW, SP, BP, IX, IY } WREGS;
typedef enum { AL,AH,CL,CH,DL,DH,BL,BH,SPL,SPH,BPL,BPH,IXL,IXH,IYL,IYH } BREGS;

#pragma pack(1)
typedef union
{
   /* eight general registers */
   uint16_t w[8];    /* viewed as 16 bits registers */
   uint8_t  b[16];   /* or as 8 bit registers */
} necbasicregs;
typedef struct
{
   necbasicregs regs;
   uint16_t	sregs[4];

   uint16_t	ip;

   int32_t	SignVal;
   int32_t  AuxVal, OverVal, ZeroVal, CarryVal, ParityVal; /* 0 or non-0 valued flags */

   uint32_t	TF, IF, DF, MF; 	/* 0 or 1 valued flags */	/* OB[19.07.99] added Mode Flag V30 */

   uint32_t	int_vector;
   uint32_t	pending_irq;
   uint32_t	nmi_state;
   uint32_t	irq_state;
   int     (*irq_callback)(int irqline);
} nec_Regs;
#pragma pack()

enum
{
   NEC_IP=1, NEC_AW, NEC_CW, NEC_DW, NEC_BW, NEC_SP, NEC_BP, NEC_IX, NEC_IY,
   NEC_FLAGS, NEC_ES, NEC_CS, NEC_SS, NEC_DS,
   NEC_VECTOR, NEC_PENDING, NEC_NMI_STATE, NEC_IRQ_STATE
};

/* Public variables */
extern int nec_ICount;

/* Public functions */

/*
#define v20_ICount nec_ICount
extern void v20_init(void);
extern void v20_reset(void *param);
extern void v20_exit(void);
extern int v20_execute(int cycles);
extern unsigned v20_get_context(void *dst);
extern void v20_set_context(void *src);
extern unsigned v20_get_reg(int regnum);
extern void v20_set_reg(int regnum, unsigned val);
extern void v20_set_irq_line(int irqline, int state);
extern void v20_set_irq_callback(int (*callback)(int irqline));
extern const char *v20_info(void *context, int regnum);
extern unsigned v20_dasm(char *buffer, unsigned pc);

#define v30_ICount nec_ICount
extern void v30_init(void);
extern void v30_reset(void *param);
extern void v30_exit(void);
extern int v30_execute(int cycles);
extern unsigned v30_get_context(void *dst);
extern void v30_set_context(void *src);
extern unsigned v30_get_reg(int regnum);
extern void v30_set_reg(int regnum, unsigned val);
extern void v30_set_irq_line(int irqline, int state);
extern void v30_set_irq_callback(int (*callback)(int irqline));
extern const char *v30_info(void *context, int regnum);
extern unsigned v30_dasm(char *buffer, unsigned pc);

#define v33_ICount nec_ICount
extern void v33_init(void);
extern void v33_reset(void *param);
extern void v33_exit(void);
extern int v33_execute(int cycles);
extern unsigned v33_get_context(void *dst);
extern void v33_set_context(void *src);
extern unsigned v33_get_reg(int regnum);
extern void v33_set_reg(int regnum, unsigned val);
extern void v33_set_irq_line(int irqline, int state);
extern void v33_set_irq_callback(int (*callback)(int irqline));
extern const char *v33_info(void *context, int regnum);
extern unsigned v33_dasm(char *buffer, unsigned pc);
*/

void nec_set_irq_line(int irqline, int state);
void nec_set_reg(int regnum, uint32_t val);
int nec_execute(int cycles);
unsigned nec_get_reg(int regnum);
void nec_reset (void *param);
void nec_int(uint16_t vector);

uint8_t cpu_readport(uint8_t);
void cpu_writeport(uint32_t, uint8_t);
#define cpu_readop cpu_readmem20
#define cpu_readop_arg cpu_readmem20
void cpu_writemem20(uint32_t, uint8_t);
uint8_t cpu_readmem20(uint32_t);

#endif /* __NECITRF_H_ */