#ifndef POKEY_H_
#define POKEY_H_


#include "atari.h"


#define POKEY_OFFSET_AUDF1 0x00
#define POKEY_OFFSET_AUDC1 0x01
#define POKEY_OFFSET_AUDF2 0x02
#define POKEY_OFFSET_AUDC2 0x03
#define POKEY_OFFSET_AUDF3 0x04
#define POKEY_OFFSET_AUDC3 0x05
#define POKEY_OFFSET_AUDF4 0x06
#define POKEY_OFFSET_AUDC4 0x07
#define POKEY_OFFSET_AUDCTL 0x08
#define POKEY_OFFSET_STIMER 0x09
#define POKEY_OFFSET_SKRES 0x0a
#define POKEY_OFFSET_POTGO 0x0b
#define POKEY_OFFSET_SEROUT 0x0d
#define POKEY_OFFSET_IRQEN 0x0e
#define POKEY_OFFSET_SKCTL 0x0f

#define POKEY_OFFSET_POT0 0x00
#define POKEY_OFFSET_POT1 0x01
#define POKEY_OFFSET_POT2 0x02
#define POKEY_OFFSET_POT3 0x03
#define POKEY_OFFSET_POT4 0x04
#define POKEY_OFFSET_POT5 0x05
#define POKEY_OFFSET_POT6 0x06
#define POKEY_OFFSET_POT7 0x07
#define POKEY_OFFSET_ALLPOT 0x08
#define POKEY_OFFSET_KBCODE 0x09
#define POKEY_OFFSET_RANDOM 0x0a
#define POKEY_OFFSET_SERIN 0x0d
#define POKEY_OFFSET_IRQST 0x0e
#define POKEY_OFFSET_SKSTAT 0x0f

#define POKEY_OFFSET_POKEY2 0x10			/* offset to second pokey chip (STEREO expansion) */

#ifndef ASAP

extern UBYTE POKEY_KBCODE;
extern UBYTE POKEY_IRQST;
extern UBYTE POKEY_IRQEN;
extern UBYTE POKEY_SKSTAT;
extern UBYTE POKEY_SKCTL;
extern int POKEY_DELAYED_SERIN_IRQ;
extern int POKEY_DELAYED_SEROUT_IRQ;
extern int POKEY_DELAYED_XMTDONE_IRQ;

extern UBYTE POKEY_POT_input[8];

ULONG POKEY_GetRandomCounter(void);
void POKEY_SetRandomCounter(ULONG value);
UBYTE POKEY_GetByte(UWORD addr, int no_side_effects);
void POKEY_PutByte(UWORD addr, UBYTE byte);
int POKEY_Initialise(void);
void POKEY_Frame(void);
void POKEY_Scanline(void);
void POKEY_StateSave(void);
void POKEY_StateRead(void);

#endif

/* CONSTANT DEFINITIONS */

/* definitions for AUDCx (D201, D203, D205, D207) */
#define POKEY_NOTPOLY5    0x80		/* selects POLY5 or direct CLOCK */
#define POKEY_POLY4       0x40		/* selects POLY4 or POLY17 */
#define POKEY_PURETONE    0x20		/* selects POLY4/17 or PURE tone */
#define POKEY_VOL_ONLY    0x10		/* selects VOLUME OUTPUT ONLY */
#define POKEY_VOLUME_MASK 0x0f		/* volume mask */

/* definitions for AUDCTL (D208) */
#define POKEY_POLY9       0x80		/* selects POLY9 or POLY17 */
#define POKEY_CH1_179     0x40		/* selects 1.78979 MHz for Ch 1 */
#define POKEY_CH3_179     0x20		/* selects 1.78979 MHz for Ch 3 */
#define POKEY_CH1_CH2     0x10		/* clocks channel 1 w/channel 2 */
#define POKEY_CH3_CH4     0x08		/* clocks channel 3 w/channel 4 */
#define POKEY_CH1_FILTER  0x04		/* selects channel 1 high pass filter */
#define POKEY_CH2_FILTER  0x02		/* selects channel 2 high pass filter */
#define POKEY_CLOCK_15    0x01		/* selects 15.6999kHz or 63.9210kHz */

/* for accuracy, the 64kHz and 15kHz clocks are exact divisions of
   the 1.79MHz clock */
#define POKEY_DIV_64      28			/* divisor for 1.79MHz clock to 64 kHz */
#define POKEY_DIV_15      114			/* divisor for 1.79MHz clock to 15 kHz */

/* the size (in entries) of the 4 polynomial tables */
#define POKEY_POLY4_SIZE  0x000f
#define POKEY_POLY5_SIZE  0x001f
#define POKEY_POLY9_SIZE  511 //0x01ff
#define POKEY_POLY17_SIZE 16385//0x0001ffff

#define POKEY_MAXPOKEYS         2		/* max number of emulated chips */

/* channel/chip definitions */
#define POKEY_CHAN1       0
#define POKEY_CHAN2       1
#define POKEY_CHAN3       2
#define POKEY_CHAN4       3
#define POKEY_CHIP1       0
#define POKEY_CHIP2       4
#define POKEY_CHIP3       8
#define POKEY_CHIP4      12
#define POKEY_SAMPLE    127

/* structures to hold the 9 pokey control bytes */
extern UBYTE POKEY_AUDF[4 * POKEY_MAXPOKEYS];	/* AUDFx (D200, D202, D204, D206) */
extern UBYTE POKEY_AUDC[4 * POKEY_MAXPOKEYS];	/* AUDCx (D201, D203, D205, D207) */
extern UBYTE POKEY_AUDCTL[POKEY_MAXPOKEYS];		/* AUDCTL (D208) */

extern int POKEY_DivNIRQ[4], POKEY_DivNMax[4];
extern int POKEY_Base_mult[POKEY_MAXPOKEYS];	/* selects either 64Khz or 15Khz clock mult */

extern const UBYTE POKEY_poly9_lookup[POKEY_POLY9_SIZE];
extern const UBYTE POKEY_poly17_lookup[POKEY_POLY17_SIZE];

#endif /* POKEY_H_ */
