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/*
    mbc55x.h
    Includes for the Sanyo MBC-550, MBC-555.

    Phill Harvey-Smith
    2011-01-29.
*/

#include "emu.h"
#include "cpu/i86/i86.h"
#include "machine/ram.h"
#include "machine/ctronics.h"
#include "machine/i8255.h"
#include "machine/pit8253.h"
#include "machine/pic8259.h"
#include "machine/wd17xx.h"
#include "machine/i8251.h"
#include "sound/speaker.h"
#include "video/mc6845.h"
#include "imagedev/flopdrv.h"
#include "formats/pc_dsk.h"
#include "debugger.h"
#include "debug/debugcon.h"

#define MAINCPU_TAG "maincpu"

#define SCREEN_TAG		"screen"
#define SCREEN_WIDTH_PIXELS     640
#define SCREEN_HEIGHT_LINES     250
#define SCREEN_NO_COLOURS       8

#define VIDEO_MEM_SIZE		(32*1024)
#define VID_MC6845_NAME		"mc6845"

// Red and blue colour planes sit at a fixed location, green
// is in main memory.

#define COLOUR_PLANE_SIZE	0x4000

#define	RED_PLANE_OFFSET	(0*COLOUR_PLANE_SIZE)
#define BLUE_PLANE_OFFSET	(1*COLOUR_PLANE_SIZE)

#define COLOUR_PLANE_MEMBASE	0xF0000
#define RED_PLANE_MEMBASE	(COLOUR_PLANE_MEMBASE+RED_PLANE_OFFSET)
#define BLUE_PLANE_MEMBASE	(COLOUR_PLANE_MEMBASE+BLUE_PLANE_OFFSET)

#define RED_PLANE_TAG		"red"
#define BLUE_PLANE_TAG		"blue"

// Keyboard

#define MBC55X_KEYROWS      	7
#define KEYBOARD_QUEUE_SIZE 	32

#define KB_BITMASK		0x1000
#define KB_SHIFTS		12

#define KEY_SPECIAL_TAG		"KEY_SPECIAL"
#define KEY_BIT_LSHIFT		0x01
#define KEY_BIT_RSHIFT		0x02
#define KEY_BIT_CTRL		0x04
#define KEY_BIT_GRAPH		0x08

#define PPI8255_TAG		"ppi8255"
#define PIC8259_TAG		"pic8259"

// From tech manual clock c1 is fed from c0, but it approx 100Hz
#define PIT8253_TAG		"pit8253"
#define PIT_C0_CLOCK	78600
#define PIT_C1_CLOCK	100
#define PIT_C2_CLOCK	1789770

#define MONO_TAG                "mono"
#define I8251A_KB_TAG			"i8251a_kb"
#define FDC_TAG                 "wd1793"


struct keyboard_t
{
	UINT8       keyrows[MBC55X_KEYROWS];
	emu_timer   *keyscan_timer;

	UINT8		key_special;
};


class mbc55x_state : public driver_device
{
public:
	mbc55x_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
	m_maincpu(*this, MAINCPU_TAG),
	m_crtc(*this, VID_MC6845_NAME),
	m_kb_uart(*this, I8251A_KB_TAG),
	m_pit(*this, PIT8253_TAG),
	m_ppi(*this, PPI8255_TAG),
	m_pic(*this, PIC8259_TAG),
	m_fdc(*this, FDC_TAG),
	m_speaker(*this, SPEAKER_TAG),
	m_ram(*this, RAM_TAG)
	{ }

	required_device<cpu_device> m_maincpu;
	required_device<mc6845_device> m_crtc;
	required_device<i8251_device> m_kb_uart;
	required_device<device_t> m_pit;
	required_device<i8255_device> m_ppi;
	required_device<device_t> m_pic;
	required_device<device_t> m_fdc;
	required_device<device_t> m_speaker;
	required_device<ram_device> m_ram;
	//DECLARE_READ8_MEMBER(pic8259_r);
	//DECLARE_WRITE8_MEMBER(pic8259_w);
	//DECLARE_READ8_MEMBER(mbc55x_disk_r);
	//DECLARE_WRITE8_MEMBER(mbc55x_disk_w);
	DECLARE_READ8_MEMBER(mbc55x_usart_r);
	DECLARE_WRITE8_MEMBER(mbc55x_usart_w);
	//DECLARE_READ8_MEMBER(mbc55x_kb_usart_r);
	//DECLARE_WRITE8_MEMBER(mbc55x_kb_usart_w);
	DECLARE_READ8_MEMBER(vram_page_r);
	DECLARE_WRITE8_MEMBER(vram_page_w);
	DECLARE_READ8_MEMBER(ppi8255_r);
	DECLARE_WRITE8_MEMBER(ppi8255_w);
	//DECLARE_READ8_MEMBER(pit8253_r);
	//DECLARE_WRITE8_MEMBER(pit8253_w);
	DECLARE_READ16_MEMBER(mbc55x_io_r);
	DECLARE_WRITE16_MEMBER(mbc55x_io_w);
	DECLARE_READ8_MEMBER(mbc55x_ppi_porta_r);
	DECLARE_READ8_MEMBER(mbc55x_ppi_portb_r);
	DECLARE_READ8_MEMBER(mbc55x_ppi_portc_r);
	DECLARE_WRITE8_MEMBER(mbc55x_ppi_porta_w);
	DECLARE_WRITE8_MEMBER(mbc55x_ppi_portb_w);
	DECLARE_WRITE8_MEMBER(mbc55x_ppi_portc_w);
	DECLARE_WRITE_LINE_MEMBER(vid_hsync_changed);
	DECLARE_WRITE_LINE_MEMBER(vid_vsync_changed);
	DECLARE_WRITE_LINE_MEMBER(pit8253_t2);
	DECLARE_WRITE_LINE_MEMBER(mbc55x_fdc_intrq_w);
	DECLARE_WRITE_LINE_MEMBER(mbc55x_fdc_drq_w);
	UINT32		m_debug_machine;
	UINT32		m_debug_video;
	UINT8		m_video_mem[VIDEO_MEM_SIZE];
	UINT8		m_vram_page;

	keyboard_t	m_keyboard;
	DECLARE_READ8_MEMBER(mbcpic8259_r);
	DECLARE_WRITE8_MEMBER(mbcpic8259_w);
	DECLARE_READ8_MEMBER(mbcpit8253_r);
	DECLARE_WRITE8_MEMBER(mbcpit8253_w);
	DECLARE_READ8_MEMBER(mbc55x_disk_r);
	DECLARE_WRITE8_MEMBER(mbc55x_disk_w);
	DECLARE_READ8_MEMBER(mbc55x_kb_usart_r);
	DECLARE_WRITE8_MEMBER(mbc55x_kb_usart_w);
	DECLARE_DRIVER_INIT(mbc55x);
	virtual void machine_start();
	virtual void machine_reset();
	virtual void video_start();
	virtual void video_reset();
	virtual void palette_init();
	void screen_eof_mbc55x(screen_device &screen, bool state);
};

/* IO chips */


struct msm_rx_t
{
};

/*----------- defined in drivers/mbc55x.c -----------*/

extern const unsigned char mbc55x_palette[SCREEN_NO_COLOURS][3];


/*----------- defined in machine/mbc55x.c -----------*/

extern const struct pit8253_config mbc55x_pit8253_config;
extern const struct pic8259_interface mbc55x_pic8259_config;
extern const i8255_interface mbc55x_ppi8255_interface;
extern const i8251_interface mbc55x_i8251a_interface;
extern const i8251_interface mbc55x_i8251b_interface;





/* Memory controller */
#define RAM_BANK00_TAG  "bank0"
#define RAM_BANK01_TAG  "bank1"
#define RAM_BANK02_TAG  "bank2"
#define RAM_BANK03_TAG  "bank3"
#define RAM_BANK04_TAG  "bank4"
#define RAM_BANK05_TAG  "bank5"
#define RAM_BANK06_TAG  "bank6"
#define RAM_BANK07_TAG  "bank7"
#define RAM_BANK08_TAG  "bank8"
#define RAM_BANK09_TAG  "bank9"
#define RAM_BANK0A_TAG  "banka"
#define RAM_BANK0B_TAG  "bankb"
#define RAM_BANK0C_TAG  "bankc"
#define RAM_BANK0D_TAG  "bankd"
#define RAM_BANK0E_TAG  "banke"

#define RAM_BANK_SIZE	(64*1024)
#define RAM_BANK_COUNT	15


DECLARE_READ8_HANDLER(ppi8255_r);
DECLARE_WRITE8_HANDLER(ppi8255_w);

/* Floppy drive interface */

#define FDC_PAUSE				10000

extern const wd17xx_interface mbc55x_wd17xx_interface;


/*----------- defined in video/mbc55x.c -----------*/

extern const mc6845_interface mb55x_mc6845_intf;

DECLARE_READ16_HANDLER (mbc55x_video_io_r);
DECLARE_WRITE16_HANDLER (mbc55x_video_io_w);


#define RED                     0
#define GREEN                   1
#define BLUE                    2

#define LINEAR_ADDR(seg,ofs)    ((seg<<4)+ofs)

#define OUTPUT_SEGOFS(mess,seg,ofs)  logerror("%s=%04X:%04X [%08X]\n",mess,seg,ofs,((seg<<4)+ofs))