mame/src/mess/includes/pce.h

/*****************************************************************************
 *
 * includes/pce.h
 *
 * NEC PC Engine/TurboGrafx16
 *
 ****************************************************************************/

#ifndef PCE_H_
#define PCE_H_

#include "cdrom.h"
#include "cpu/h6280/h6280.h"
#include "sound/msm5205.h"
#include "machine/nvram.h"
#include "video/huc6260.h"

#define C6280_TAG           "c6280"

#define MAIN_CLOCK      21477270
#define PCE_CD_CLOCK    9216000

#define PCE_HEADER_SIZE     512

#define TG_16_JOY_SIG       0x00
#define PCE_JOY_SIG         0x40
#define NO_CD_SIG           0x80
#define CD_SIG              0x00
/* these might be used to indicate something, but they always seem to return 1 */
#define CONST_SIG           0x30

/* the largest possible cartridge image (street fighter 2 - 2.5MB) */
#define PCE_ROM_MAXSIZE     0x280000

struct pce_cd_t
{
	UINT8   regs[16];
	UINT8   *bram;
	UINT8   *adpcm_ram;
	int     bram_locked;
	int     adpcm_read_ptr;
	UINT8   adpcm_read_buf;
	int     adpcm_write_ptr;
	UINT8   adpcm_write_buf;
	int     adpcm_length;
	int     adpcm_clock_divider;
	UINT32  msm_start_addr;
	UINT32  msm_end_addr;
	UINT32  msm_half_addr;
	UINT8   msm_nibble;
	UINT8   msm_idle;
	UINT8   msm_repeat;

	/* SCSI signals */
	int     scsi_BSY;   /* Busy. Bus in use */
	int     scsi_SEL;   /* Select. Initiator has won arbitration and has selected a target */
	int     scsi_CD;    /* Control/Data. Target is sending control (data) information */
	int     scsi_IO;    /* Input/Output. Target is sending (receiving) information */
	int     scsi_MSG;   /* Message. Target is sending or receiving a message */
	int     scsi_REQ;   /* Request. Target is requesting a data transfer */
	int     scsi_ACK;   /* Acknowledge. Initiator acknowledges that it is ready for a data transfer */
	int     scsi_ATN;   /* Attention. Initiator has a message ready for the target */
	int     scsi_RST;   /* Reset. Initiator forces all targets and any other initiators to do a warm reset */
	int     scsi_last_RST;  /* To catch setting of RST signal */
	int     cd_motor_on;
	int     selected;
	UINT8   *command_buffer;
	int     command_buffer_index;
	int     status_sent;
	int     message_after_status;
	int     message_sent;
	UINT8   *data_buffer;
	int     data_buffer_size;
	int     data_buffer_index;
	int     data_transferred;

	/* Arcade Card specific */
	UINT8   *acard_ram;
	UINT8   acard_latch;
	UINT8   acard_ctrl[4];
	UINT32  acard_base_addr[4];
	UINT16  acard_addr_offset[4];
	UINT16  acard_addr_inc[4];
	UINT32  acard_shift;
	UINT8   acard_shift_reg;

	UINT32  current_frame;
	UINT32  end_frame;
	UINT32  last_frame;
	UINT8   cdda_status;
	UINT8   cdda_play_mode;
	UINT8   *subcode_buffer;
	UINT8   end_mark;
	cdrom_file  *cd;
	const cdrom_toc*    toc;
	emu_timer   *data_timer;
	emu_timer   *adpcm_dma_timer;

	emu_timer   *cdda_fadeout_timer;
	emu_timer   *cdda_fadein_timer;
	double  cdda_volume;
	emu_timer   *adpcm_fadeout_timer;
	emu_timer   *adpcm_fadein_timer;
	double  adpcm_volume;
};


class pce_state : public driver_device
{
public:
	pce_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_cd_ram(*this, "cd_ram"),
		m_user_ram(*this, "user_ram"),
		m_huc6260(*this, "huc6260")
	{ }

	required_device<h6280_device> m_maincpu;
	required_shared_ptr<UINT8> m_cd_ram;
	required_shared_ptr<UINT8> m_user_ram;
	optional_device<huc6260_device> m_huc6260;
	UINT8 m_io_port_options;
	UINT8 m_sys3_card;
	UINT8 m_acard;
	pce_cd_t m_cd;
	UINT8 *m_cartridge_ram;
	int m_joystick_port_select;
	int m_joystick_data_select;
	UINT8 m_joy_6b_packet[5];
	DECLARE_WRITE8_MEMBER(pce_sf2_banking_w);
	DECLARE_WRITE8_MEMBER(pce_cartridge_ram_w);
	DECLARE_WRITE8_MEMBER(mess_pce_joystick_w);
	DECLARE_READ8_MEMBER(mess_pce_joystick_r);
	DECLARE_WRITE8_MEMBER(pce_cd_bram_w);
	DECLARE_WRITE8_MEMBER(pce_cd_intf_w);
	DECLARE_READ8_MEMBER(pce_cd_intf_r);
	DECLARE_READ8_MEMBER(pce_cd_acard_r);
	DECLARE_WRITE8_MEMBER(pce_cd_acard_w);
	DECLARE_READ8_MEMBER(pce_cd_acard_wram_r);
	DECLARE_WRITE8_MEMBER(pce_cd_acard_wram_w);
	DECLARE_DRIVER_INIT(sgx);
	DECLARE_DRIVER_INIT(tg16);
	DECLARE_DRIVER_INIT(mess_pce);
	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	DECLARE_MACHINE_START(pce);
	DECLARE_MACHINE_RESET(mess_pce);
	TIMER_CALLBACK_MEMBER(pce_cd_data_timer_callback);
	TIMER_CALLBACK_MEMBER(pce_cd_cdda_fadeout_callback);
	TIMER_CALLBACK_MEMBER(pce_cd_cdda_fadein_callback);
	TIMER_CALLBACK_MEMBER(pce_cd_adpcm_fadeout_callback);
	TIMER_CALLBACK_MEMBER(pce_cd_adpcm_fadein_callback);
	TIMER_CALLBACK_MEMBER(pce_cd_clear_ack);
	TIMER_CALLBACK_MEMBER(pce_cd_adpcm_dma_timer_callback);
	DECLARE_WRITE_LINE_MEMBER(pce_irq_changed);
	DECLARE_DEVICE_IMAGE_LOAD_MEMBER(pce_cart);
};


/*----------- defined in machine/pce.c -----------*/
extern const msm5205_interface pce_cd_msm5205_interface;

#endif /* PCE_H_ */