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// license:BSD-3-Clause
// copyright-holders:David Haywood

/*
  _____________________________________________________________________
  |                    _____________  _______DALLAS____________        |
  |                    |  ROM U6    | |                        |   __  |
  |                    |____________| |KM62256BLG-7L    BATT   |   | | |
  |                        ____       |       DS5002FP         |   |J| |
  |             ____       |U7 |      |________________________|   |P| |
  |             356N       |___|   _________      ____________     |6| |
  |                                74HCT132N|     CXK5814P-35L     |_| |
  |                      _________ _________                 _________ |
  |                      74HCT373N||74HC04B1|   _________    74HCT245N |
  |            ________  _____________          |        |   _________ |
  | __         |74F112N| | ROM U11    |    TPC1020BFN-084C   74HCT245N |
  | | |        _____     |____________|         |        |   _________ |
  | |J|        |XTAL|    _________ _________    |________|   74HCT273E |
  | |P|        |____|    |SN74F32N||74LS257_|                _________ |
  | |1|        ______    _________ _________  _____________  74HCT273E |
  | |_|        | U10 |   |ULN2003A||74LS257_| UM611024AK-20| _________ |
  |  ______    ______    ______________________    ______    74HCT273E |
  |  |FUSE_|   |_JP2_|   |_________JP3_________|   |_JP5_|             |
  |____________________________________________________________________|

 JP1 = Power (9 pins)
 JP2 = Serial DB9 (unused)
 JP3 = Darts board (20 pins)
 JP5 = Video out (6 pins)
 JP6 = Buttons (15 pins)

 XATL = 32.000 MHz

 U7 = Oki
 U10 = Unpopulated socket for Max 202

*/

#include "emu.h"
#include "cpu/mcs51/mcs51.h"
#include "machine/nvram.h"
#include "sound/okim6295.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"


class goldart_state : public driver_device
{
public:
	goldart_state(const machine_config& mconfig, device_type type, const char* tag) :
		driver_device(mconfig, type, tag),
		m_mcu(*this, "mcu"),
		m_palette(*this, "palette"),
		m_data(*this, "data")
	{ }

	void goldart(machine_config& config);

protected:
	virtual void machine_start() override;
	virtual void machine_reset() override;
	virtual void video_start() override;

private:
	required_device<ds5002fp_device> m_mcu;
	required_device<palette_device> m_palette;
	required_region_ptr<uint8_t> m_data;

	DECLARE_WRITE8_MEMBER(mcu_port1_w);
	DECLARE_READ8_MEMBER(mcu_port1_r);


	uint32_t screen_update_goldart(screen_device& screen, bitmap_ind16& bitmap, const rectangle& cliprect);
	void dallas_rom(address_map& map);
	void dallas_ram(address_map& map);

	uint8_t m_ram[0x10000];
	uint8_t m_port1;

	DECLARE_READ8_MEMBER(hostmem_r);
	DECLARE_WRITE8_MEMBER(hostmem_w);
};

WRITE8_MEMBER(goldart_state::mcu_port1_w)
{
	logerror("%s: mcu_port1_w %02x\n", machine().describe_context(), data);
	m_port1 = data;
}

READ8_MEMBER(goldart_state::mcu_port1_r)
{
	uint8_t ret = m_port1;
	logerror("%s: mcu_port1_r %02x\n", machine().describe_context(), ret);
	return ret;
}

void goldart_state::video_start()
{
}

uint32_t goldart_state::screen_update_goldart(screen_device& screen, bitmap_ind16& bitmap, const rectangle& cliprect)
{

	for (int i = 0; i < 256; i++)
	{
		// paletteram might be separate, but for now our memory setup means the data is at the end of the m_ram area
		uint16_t pal = (m_ram[0xfe00 + (i * 2)] << 8) | (m_ram[0xfe01 + (i * 2)] << 0);
		m_palette->set_pen_color(i, ((pal >> 10) & 0x1f)<<3, ((pal >> 5) & 0x1f)<<3, (pal & 0x1f)<<3);
	}

	int count = 16*192;
	for (int y = 0; y < 256; y++)
	{
		for (int x = 0; x < 192; x++)
		{
			uint16_t* dstptr_bitmap  =  &bitmap.pix16(y);
			uint8_t data = m_ram[count];
			count++;

			dstptr_bitmap[x] = data^0xff;
		}
	}

	return 0;
}

READ8_MEMBER(goldart_state::hostmem_r)
{
	// must be some control bits (or DS5002FP memory access isn't correct) as registers map over ROM/RAM with no obvious way to select at the moment
	// and we need to be able to access full range of each ROM bank at least

	int bank = m_port1 & 0x07;
	uint8_t ret = m_data[(bank * 0x10000) + offset];
	logerror("%s: hostmem_r %04x: %02x (from ROM?)\n", machine().describe_context(), offset, ret);
	return ret;
}

WRITE8_MEMBER(goldart_state::hostmem_w)
{
	// registers seem to control write modes? (palette select bits, overwrite / transparent drawing etc.)

	// address fffe appears to be significant as it gets set with data fetched from a the same table as
	// the source gfx addresses (1 byte to bank register, 2 bytes to data pointer, 1 byte to fffe)

	logerror("%s: hostmem_w %04x: %02x (to RAM?)\n", machine().describe_context(), offset, data);
	m_ram[offset] = data;
}


void goldart_state::dallas_rom(address_map &map)
{
	map(0x00000, 0x07fff).readonly().share("sram");
}

void goldart_state::dallas_ram(address_map &map)
{
	map(0x00000, 0x0ffff).rw(FUNC(goldart_state::hostmem_r), FUNC(goldart_state::hostmem_w));
	map(0x10000, 0x17fff).ram().share("sram");
}

static INPUT_PORTS_START( goldart )
INPUT_PORTS_END


void goldart_state::machine_start()
{
	save_item(NAME(m_ram));
}

void goldart_state::machine_reset()
{
}

void goldart_state::goldart(machine_config &config)
{
	/* basic machine hardware */
	ds5002fp_device &mcu(DS5002FP(config, "mcu", 12000000));
	mcu.set_addrmap(AS_PROGRAM, &goldart_state::dallas_rom);
	mcu.set_addrmap(AS_IO, &goldart_state::dallas_ram);
	mcu.set_vblank_int("screen", FUNC(goldart_state::irq0_line_hold));
	// only uses port 1?
	mcu.port_out_cb<1>().set(FUNC(goldart_state::mcu_port1_w));
	mcu.port_in_cb<1>().set(FUNC(goldart_state::mcu_port1_r));

	NVRAM(config, "sram", nvram_device::DEFAULT_ALL_0);

	/* video hardware */
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_refresh_hz(60);
	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
	screen.set_size(256, 512);
	screen.set_visarea(0, 192-1, 0, 256-1);
	screen.set_screen_update(FUNC(goldart_state::screen_update_goldart));
	screen.set_palette("palette");

	PALETTE(config, m_palette, palette_device::BLACK, 256);

	/* sound hardware */
	SPEAKER(config, "mono").front_center();

	OKIM6295(config, "oki", 1056000, okim6295_device::PIN7_HIGH).add_route(ALL_OUTPUTS, "mono", 1.0); // clock frequency & pin 7 not verified
}

/* Different versions of the internal code exist (0x6000-0x6fff code is VERY different between them)
   the one we're using for now was taken from the Spanish set but doesn't seem region specific as
   all strings are referenced through tables of pointers in the external ROM

   Code at 692F is potentially incorrect should be 0E or 1F
   Code at 6ABF is potentially incorrect should be AE or 74

   dump is tested and runs attract mode correctly on PCB
*/


ROM_START( goldart )
	ROM_REGION( 0x8000, "sram", 0 ) /* DS5002FP code */
	ROM_LOAD( "ds5002fp_sram.bin", 0x00000, 0x8000, BAD_DUMP CRC(cd2bf151) SHA1(6f601cef86493fc2db181c93b17949b982149b0e) )

	ROM_REGION( 0x100, "mcu:internal", ROMREGION_ERASE00 )
	DS5002FP_SET_MON( 0x79 )
	DS5002FP_SET_RPCTL( 0x00 )
	DS5002FP_SET_CRCR( 0x80 )

	ROM_REGION( 0x80000, "data", 0 )
	ROM_LOAD( "u11_e_262.bin", 0x00000, 0x80000, CRC(325551e0) SHA1(4fe8d71d448de3f8a9b5751bad6e90d2e556cb8f) )

	ROM_REGION( 0x80000, "oki", 0 )
	ROM_LOAD( "u6_e.bin", 0x00000, 0x80000, CRC(dd9dc689) SHA1(11871ba815372c06f8b1367d2897c37953db7bdd) )
ROM_END

ROM_START( goldartp )
	ROM_REGION( 0x8000, "sram", 0 ) /* DS5002FP code */
	ROM_LOAD( "ds5002fp_sram.bin", 0x00000, 0x8000, BAD_DUMP CRC(cd2bf151) SHA1(6f601cef86493fc2db181c93b17949b982149b0e) )

	ROM_REGION( 0x100, "mcu:internal", ROMREGION_ERASE00 )
	DS5002FP_SET_MON( 0x79 )
	DS5002FP_SET_RPCTL( 0x00 )
	DS5002FP_SET_CRCR( 0x80 )

	ROM_REGION( 0x80000, "data", 0 )
	ROM_LOAD( "p-262.u11", 0x00000, 0x80000, CRC(fa6537b0) SHA1(a4c3ac8f5139b18f0688beaa374c75a6f0aabcd2) )

	ROM_REGION( 0x80000, "oki", 0 )
	ROM_LOAD( "p-262.u6", 0x00000, 0x80000, CRC(4177e78b) SHA1(1099568b97a08c33a7da1bf46fc106f25af15e90) )
ROM_END


GAME( 1994, goldart,       0,        goldart,     goldart,      goldart_state, empty_init, ROT0, "Covielsa / Gaelco",   "Goldart (Spain)",            MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
GAME( 1994, goldartp,      goldart,  goldart,     goldart,      goldart_state, empty_init, ROT0, "Covielsa / Gaelco",   "Goldart (Portugal)",         MACHINE_NOT_WORKING | MACHINE_NO_SOUND )