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// license:BSD-3-Clause
// copyright-holders:Phill Harvey-Smith
/*
    mbc55x.h
    Includes for the Sanyo MBC-550, MBC-555.

    Phill Harvey-Smith
    2011-01-29.
*/
#ifndef MAME_INCLUDES_MBC55X_H
#define MAME_INCLUDES_MBC55X_H

#pragma once

#include "bus/centronics/ctronics.h"
#include "cpu/i86/i86.h"
#include "imagedev/flopdrv.h"
#include "machine/i8251.h"
#include "machine/i8255.h"
#include "machine/pic8259.h"
#include "machine/pit8253.h"
#include "machine/ram.h"
#include "machine/wd_fdc.h"
#include "sound/spkrdev.h"
#include "video/mc6845.h"

#include "debug/debugcon.h"
#include "debugger.h"

#include "formats/pc_dsk.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_t       keyrows[MBC55X_KEYROWS];
	emu_timer   *keyscan_timer;

	uint8_t       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_floppy0(*this, FDC_TAG ":0"),
		m_floppy1(*this, FDC_TAG ":1"),
		m_floppy2(*this, FDC_TAG ":2"),
		m_floppy3(*this, FDC_TAG ":3"),
		m_speaker(*this, "speaker"),
		m_ram(*this, RAM_TAG),
		m_palette(*this, "palette")
	{
	}

	DECLARE_FLOPPY_FORMATS(floppy_formats);

	//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_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_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);
	void init_mbc55x();

	MC6845_UPDATE_ROW(crtc_update_row);
	DECLARE_PALETTE_INIT(mbc55x);
	DECLARE_WRITE_LINE_MEMBER(screen_vblank_mbc55x);
	TIMER_CALLBACK_MEMBER(keyscan_callback);

	required_device<cpu_device> m_maincpu;

	uint32_t      m_debug_machine;

	void mbc55x(machine_config &config);
	void mbc55x_io(address_map &map);
	void mbc55x_mem(address_map &map);
protected:
	virtual void machine_start() override;
	virtual void machine_reset() override;
	virtual void video_start() override;
	virtual void video_reset() override;

	void keyboard_reset();
	void scan_keyboard();
	void set_ram_size();

	required_device<mc6845_device> m_crtc;
	required_device<i8251_device> m_kb_uart;
	required_device<pit8253_device> m_pit;
	required_device<i8255_device> m_ppi;
	required_device<pic8259_device> m_pic;
	required_device<fd1793_device> m_fdc;
	required_device<floppy_connector> m_floppy0;
	required_device<floppy_connector> m_floppy1;
	required_device<floppy_connector> m_floppy2;
	required_device<floppy_connector> m_floppy3;
	required_device<speaker_sound_device> m_speaker;
	required_device<ram_device> m_ram;
	required_device<palette_device> m_palette;

	uint32_t      m_debug_video;
	uint8_t       m_video_mem[VIDEO_MEM_SIZE];
	uint8_t       m_vram_page;

	keyboard_t  m_keyboard;

private:
	void debug_command(int ref, const std::vector<std::string> &params);
	void video_debug(int ref, const std::vector<std::string> &params);
};

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

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


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

/* 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

/* Floppy drive interface */

#define FDC_PAUSE               10000


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

#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))

#endif // MAME_INCLUDES_MBC55X_H