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// license:MAME
// copyright-holders:Incog, Robbbert
/***************************************************************************

  bbcbc.c

  BBC Bridge Companion

  Inputs hooked up - 2009-03-14 - Robbbert
  Clock Freq added - 2009-05-18 - incog

***************************************************************************/

#include "emu.h"
#include "cpu/z80/z80.h"
#include "video/tms9928a.h"
#include "machine/z80pio.h"
#include "cpu/z80/z80daisy.h"
#include "imagedev/cartslot.h"


class bbcbc_state : public driver_device
{
public:
	bbcbc_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
	m_maincpu(*this, "maincpu")
	{ }

	required_device<cpu_device> m_maincpu;
	virtual void machine_start();
	virtual void machine_reset();
	DECLARE_WRITE_LINE_MEMBER(tms_interrupt);

	DECLARE_DEVICE_IMAGE_LOAD_MEMBER( bbcbc_cart );
};


#define MAIN_CLOCK XTAL_4_433619MHz


static ADDRESS_MAP_START( bbcbc_prg, AS_PROGRAM, 8, bbcbc_state )
	AM_RANGE(0x0000, 0x3fff) AM_ROM
	AM_RANGE(0x4000, 0xbfff) AM_ROM
	AM_RANGE(0xe000, 0xe02f) AM_RAM
	AM_RANGE(0xe030, 0xe030) AM_READ_PORT("LINE01")
	AM_RANGE(0xe031, 0xe031) AM_READ_PORT("LINE02")
	AM_RANGE(0xe032, 0xe032) AM_READ_PORT("LINE03")
	AM_RANGE(0xe033, 0xe033) AM_READ_PORT("LINE04")
	AM_RANGE(0xe034, 0xe034) AM_READ_PORT("LINE05")
	AM_RANGE(0xe035, 0xe035) AM_READ_PORT("LINE06")
	AM_RANGE(0xe036, 0xe036) AM_READ_PORT("LINE07")
	AM_RANGE(0xe037, 0xe037) AM_READ_PORT("LINE08")
	AM_RANGE(0xe038, 0xe038) AM_READ_PORT("LINE09")
	AM_RANGE(0xe039, 0xe039) AM_READ_PORT("LINE10")
	AM_RANGE(0xe03a, 0xe03a) AM_READ_PORT("LINE11")
	AM_RANGE(0xe03b, 0xe03b) AM_READ_PORT("LINE12")
	AM_RANGE(0xe03c, 0xe7ff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( bbcbc_io, AS_IO, 8, bbcbc_state )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x40, 0x43) AM_DEVREADWRITE("z80pio", z80pio_device, read, write)
	AM_RANGE(0x80, 0x80) AM_DEVREADWRITE("tms9129", tms9129_device, vram_read, vram_write)
	AM_RANGE(0x81, 0x81) AM_DEVREADWRITE("tms9129", tms9129_device, register_read, register_write)
ADDRESS_MAP_END

static INPUT_PORTS_START( bbcbc )
	PORT_START("LINE01")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Pass") PORT_CODE(KEYCODE_W) PORT_IMPULSE(1)

	PORT_START("LINE02")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Clubs") PORT_CODE(KEYCODE_G) PORT_IMPULSE(1)

	PORT_START("LINE03")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Spades") PORT_CODE(KEYCODE_D) PORT_IMPULSE(1)

	PORT_START("LINE04")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Rdbl") PORT_CODE(KEYCODE_T) PORT_IMPULSE(1)

	PORT_START("LINE05")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("NT") PORT_CODE(KEYCODE_E) PORT_IMPULSE(1)

	PORT_START("LINE06")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Hearts, Up") PORT_CODE(KEYCODE_S) PORT_IMPULSE(1)

	PORT_START("LINE07")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Play, Yes") PORT_CODE(KEYCODE_X) PORT_IMPULSE(1)

	PORT_START("LINE08")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Back") PORT_CODE(KEYCODE_A) PORT_IMPULSE(1)

	PORT_START("LINE09")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Dbl") PORT_CODE(KEYCODE_R) PORT_IMPULSE(1)

	PORT_START("LINE10")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Diamonds, Down") PORT_CODE(KEYCODE_F) PORT_IMPULSE(1)

	PORT_START("LINE11")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Start") PORT_CODE(KEYCODE_Q) PORT_IMPULSE(1)

	PORT_START("LINE12")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Play, No") PORT_CODE(KEYCODE_B) PORT_IMPULSE(1)
INPUT_PORTS_END

WRITE_LINE_MEMBER(bbcbc_state::tms_interrupt)
{
	m_maincpu->set_input_line(0, state ? ASSERT_LINE : CLEAR_LINE);
}

static const z80_daisy_config bbcbc_daisy_chain[] =
{
	{ "z80pio" },
	{ NULL }
};


DEVICE_IMAGE_LOAD_MEMBER( bbcbc_state, bbcbc_cart )
{
	UINT8 *cart = memregion("maincpu" )->base() + 0x4000;

	if ( image.software_entry() == NULL )
	{
		int size = image.length();
		if ( image.fread(cart, size ) != size ) {
			image.seterror( IMAGE_ERROR_UNSPECIFIED, "Unable to fully read from file" );
			return IMAGE_INIT_FAIL;
		}
	}
	else
	{
		UINT8 *reg = image.get_software_region( "rom" );
		int reg_len = image.get_software_region_length( "rom" );

		memcpy( cart, reg, MIN(reg_len, 0x8000) );
	}

	return IMAGE_INIT_PASS;

}

void bbcbc_state::machine_start()
{
}

void bbcbc_state::machine_reset()
{
}


static MACHINE_CONFIG_START( bbcbc, bbcbc_state )
	MCFG_CPU_ADD( "maincpu", Z80, MAIN_CLOCK / 8 )
	MCFG_CPU_PROGRAM_MAP( bbcbc_prg)
	MCFG_CPU_IO_MAP( bbcbc_io)
	MCFG_CPU_CONFIG(bbcbc_daisy_chain)

	MCFG_DEVICE_ADD("z80pio", Z80PIO, MAIN_CLOCK/8)

	MCFG_DEVICE_ADD( "tms9129", TMS9129, XTAL_10_738635MHz / 2 )
	MCFG_TMS9928A_VRAM_SIZE(0x4000)
	MCFG_TMS9928A_OUT_INT_LINE_CB(WRITELINE(bbcbc_state, tms_interrupt))
	MCFG_TMS9928A_SCREEN_ADD_PAL( "screen" )
	MCFG_SCREEN_UPDATE_DEVICE( "tms9129", tms9928a_device, screen_update )

	MCFG_CARTSLOT_ADD("cart")
	MCFG_CARTSLOT_NOT_MANDATORY
	MCFG_CARTSLOT_INTERFACE("bbcbc_cart")
	MCFG_CARTSLOT_LOAD( bbcbc_state, bbcbc_cart )

	/* Software lists */
	MCFG_SOFTWARE_LIST_ADD("cart_list","bbcbc")
MACHINE_CONFIG_END


ROM_START( bbcbc )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD("br_4_1.ic3", 0x0000, 0x2000, CRC(7c880d75) SHA1(954db096bd9e8edfef72946637a12f1083841fb0))
	ROM_LOAD("br_4_2.ic4", 0x2000, 0x2000, CRC(16a33aef) SHA1(9529f9f792718a3715af2063b91a5fb18f741226))
ROM_END

/***************************************************************************

  Game driver(s)

***************************************************************************/

/*   YEAR  NAME  PARENT  COMPAT  MACHINE INPUT  INIT  COMPANY  FULLNAME  FLAGS */
CONS(1985, bbcbc,     0, 0,      bbcbc,  bbcbc, driver_device, 0,    "BBC",   "Bridge Companion", GAME_NO_SOUND_HW )