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path: root/src/mame/drivers/gamate.cpp
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// license:GPL-2.0+
// copyright-holders:Peter Trauner
/******************************************************************************
 PeT mess@utanet.at 2007, 2014
 Peter Wilhelmsen peter.wilhelmsen@gmail.com
 Morten Shearman Kirkegaard morten+gamate@afdelingp.dk
 Juan F??lix Mateos vectrex@hackermesh.org

 nmi unknown
 bomb blast top status line missing
 ******************************************************************************/

#include "emu.h"
#include "includes/gamate.h"
#include "ui/uimain.h"
#include "rendlay.h"
#include "softlist.h"

class gamate_state : public driver_device
{
public:
	gamate_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
		, m_sound(*this, "custom")
		, m_cart(*this, "cartslot")
		, m_io_joy(*this, "JOY")
		, m_palette(*this, "palette")
		, m_bios(*this, "bios")
		, m_bank(*this, "bank")
		, m_bankmulti(*this, "bankmulti")
	{ }

	DECLARE_PALETTE_INIT(gamate);
	DECLARE_READ8_MEMBER(protection_r);
	DECLARE_READ8_MEMBER(newer_protection_set);
	DECLARE_WRITE8_MEMBER(protection_reset);
	DECLARE_READ8_MEMBER(gamate_cart_protection_r);
	DECLARE_WRITE8_MEMBER(gamate_cart_protection_w);
	DECLARE_WRITE8_MEMBER(cart_bankswitchmulti_w);
	DECLARE_WRITE8_MEMBER(cart_bankswitch_w);
	DECLARE_READ8_MEMBER(gamate_video_r);
	DECLARE_READ8_MEMBER(gamate_nmi_r);
	DECLARE_WRITE8_MEMBER(gamate_video_w);
	DECLARE_DRIVER_INIT(gamate);
	UINT32 screen_update_gamate(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	INTERRUPT_GEN_MEMBER(gamate_interrupt);
	TIMER_CALLBACK_MEMBER(gamate_timer);
	TIMER_CALLBACK_MEMBER(gamate_timer2);

private:
	virtual void machine_start() override;

	struct
	{
		UINT8 reg[8];
		struct
		{
			bool page2; // else page1
			UINT8 ypos, xpos/*tennis*/;
			UINT8 data[2][0x100][0x20];
		} bitmap;
		UINT8 x, y;
		bool y_increment;
	} video;

	struct
	{
		bool set;
		int bit_shifter;
		UINT8 cartridge_byte;
		UINT16 address; // in reality something more like short local cartridge address offset
		bool unprotected;
		bool failed;
	} card_protection;

	required_device<cpu_device> m_maincpu;
	required_device<gamate_sound_device> m_sound;
	required_device<generic_slot_device> m_cart;
	required_ioport m_io_joy;
	required_device<palette_device> m_palette;
	required_shared_ptr<UINT8> m_bios;
	required_memory_bank m_bank;
	required_memory_bank m_bankmulti;
	emu_timer *timer1;
	emu_timer *timer2;
	UINT8 bank_multi;
	UINT8 *m_cart_ptr;
};

WRITE8_MEMBER( gamate_state::gamate_cart_protection_w )
{
	logerror("%.6f protection write %x %x address:%x data:%x shift:%d\n",machine().time().as_double(), offset, data, card_protection.address, card_protection.cartridge_byte, card_protection.bit_shifter);

	switch (offset)
	{
	case 0:
		card_protection.failed= card_protection.failed || ((card_protection.cartridge_byte&0x80)!=0) != ((data&4)!=0);
		card_protection.bit_shifter++;
		if (card_protection.bit_shifter>=8)
		{
			card_protection.cartridge_byte=m_cart_ptr[card_protection.address++];
			card_protection.bit_shifter=0;
		}
		break;
	}
}

READ8_MEMBER( gamate_state::gamate_cart_protection_r )
{
	UINT8 ret=1;
	if (card_protection.bit_shifter==7 && card_protection.unprotected)
	{
		ret=m_cart_ptr[bank_multi*0x4000];
	}
	else
	{
		card_protection.bit_shifter++;
		if (card_protection.bit_shifter==8)
		{
			card_protection.bit_shifter=0;
			card_protection.cartridge_byte='G';
			card_protection.unprotected=true;
		}
		ret=(card_protection.cartridge_byte&0x80) ? 2 : 0;
		if (card_protection.bit_shifter==7 && !card_protection.failed)
		{ // now protection chip on cartridge activates cartridge chip select on cpu accesses
//          m_maincpu->space(AS_PROGRAM).install_read_handler(0x6000, 0x6000, READ8_DELEGATE(gamate_state, gamate_cart_protection_r)); // next time I will try to get this working
		}
		card_protection.cartridge_byte<<=1;
	}
	logerror("%.6f protection read %x %x address:%x data:%x shift:%d\n",machine().time().as_double(), offset, ret, card_protection.address, card_protection.cartridge_byte, card_protection.bit_shifter);
	return ret;
}

READ8_MEMBER( gamate_state::protection_r )
{
	return card_protection.set? 3: 1;
} // bits 0 and 1 checked

WRITE8_MEMBER( gamate_state::protection_reset )
{
// writes 0x20
	card_protection.address=0x6005-0x6001;
	card_protection.bit_shifter=0;
	card_protection.cartridge_byte=m_cart_ptr[card_protection.address++]; //m_cart_rom[card_protection.address++];
	card_protection.failed=false;
	card_protection.unprotected=false;
}

READ8_MEMBER( gamate_state::newer_protection_set )
{
	card_protection.set=true;
	return 0;
}

WRITE8_MEMBER( gamate_state::gamate_video_w )
{
	video.reg[offset]=data;
	switch (offset)
	{
		case 1:
			if (data&0xf)
				printf("lcd mode %x\n", data);
			video.y_increment=data&0x40;
			break;
		case 2:
			video.bitmap.xpos=data;
			break;
		case 3:
			if (data>=200)
				printf("lcd ypos: %x\n", data);
			video.bitmap.ypos=data;
			break;
		case 4:
			video.bitmap.page2=data&0x80;
			video.x=data&0x1f;
			break;
		case 5:
			video.y=data;
			break;
		case 7:
			video.bitmap.data[video.bitmap.page2][video.y][video.x&(ARRAY_LENGTH(video.bitmap.data[0][0])-1)]=data;
			if (video.y_increment)
				video.y++;
			else
				video.x++; // overruns
	}
}

WRITE8_MEMBER( gamate_state::cart_bankswitchmulti_w )
{
	bank_multi=data;
	m_bankmulti->set_base(m_cart_ptr+0x4000*data+1);
}

WRITE8_MEMBER( gamate_state::cart_bankswitch_w )
{
	m_bank->set_base(m_cart_ptr+0x4000*data);
}

READ8_MEMBER( gamate_state::gamate_video_r )
{
	if (offset!=6)
		return 0;
	UINT8 data = video.bitmap.data[video.bitmap.page2][video.y][video.x&(ARRAY_LENGTH(video.bitmap.data[0][0])-1)];
//  if (m_maincpu->pc()<0xf000)
//    machine().ui().popup_time(2, "lcd read x:%x y:%x mode:%x data:%x\n", video.x, video.y, video.reg[1], data);
	if (video.y_increment)
		video.y++;
	else
		video.x++; // overruns?

	return data;
}

READ8_MEMBER( gamate_state::gamate_nmi_r )
{
	UINT8 data=0;
	machine().ui().popup_time(2, "nmi/4800 read\n");
	return data;
}

static ADDRESS_MAP_START( gamate_mem, AS_PROGRAM, 8, gamate_state )
	AM_RANGE(0x0000, 0x03ff) AM_RAM
	AM_RANGE(0x4000, 0x400d) AM_DEVREADWRITE("custom", gamate_sound_device, device_r, device_w)
	AM_RANGE(0x4400, 0x4400) AM_READ_PORT("JOY")
	AM_RANGE(0x4800, 0x4800) AM_READ(gamate_nmi_r)
	AM_RANGE(0x5000, 0x5007) AM_READWRITE(gamate_video_r, gamate_video_w)
	AM_RANGE(0x5800, 0x5800) AM_READ(newer_protection_set)
	AM_RANGE(0x5900, 0x5900) AM_WRITE(protection_reset)
	AM_RANGE(0x5a00, 0x5a00) AM_READ(protection_r)
	AM_RANGE(0x6001, 0x9fff) AM_READ_BANK("bankmulti")
	AM_RANGE(0xa000, 0xdfff) AM_READ_BANK("bank")
	AM_RANGE(0x6000, 0x6000) AM_READWRITE(gamate_cart_protection_r, gamate_cart_protection_w)
	AM_RANGE(0x8000, 0x8000) AM_WRITE(cart_bankswitchmulti_w)
	AM_RANGE(0xc000, 0xc000) AM_WRITE(cart_bankswitch_w)
	AM_RANGE(0xf000, 0xffff) AM_ROM AM_SHARE("bios")
ADDRESS_MAP_END


static INPUT_PORTS_START( gamate )
	PORT_START("JOY")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("A")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("B")
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START) PORT_NAME("Start/Pause")
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_SELECT) PORT_NAME("Select")
INPUT_PORTS_END

/* palette in red, green, blue tribles */
static const unsigned char gamate_colors[4][3] =
{
	{ 255,255,255 },
	{ 0xa0, 0xa0, 0xa0 },
	{ 0x60, 0x60, 0x60 },
	{ 0, 0, 0 }
};

PALETTE_INIT_MEMBER(gamate_state, gamate)
{
	int i;

	for (i = 0; i < 4; i++)
	{
		palette.set_pen_color(i, gamate_colors[i][0], gamate_colors[i][1], gamate_colors[i][2]);
	}
}

static void BlitPlane(UINT16* line, UINT8 plane1, UINT8 plane2)
{
	line[3]=(plane1&1)|((plane2<<1)&2);
	line[2]=((plane1>>1)&1)|((plane2<<0)&2);
	line[1]=((plane1>>2)&1)|((plane2>>1)&2);
	line[0]=((plane1>>3)&1)|((plane2>>2)&2);
}

UINT32 gamate_state::screen_update_gamate(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	int x, y, j;
	for (y=0;y<152;y++)
	{
		for (x=-(video.bitmap.xpos&7), j=0;x<160;x+=8, j++)
		{
			UINT8 d1, d2;
			if (video.bitmap.ypos<200)
			{
				d1=video.bitmap.data[0][(y+video.bitmap.ypos)%200][(j+video.bitmap.xpos/8)&0x1f];
				d2=video.bitmap.data[1][(y+video.bitmap.ypos)%200][(j+video.bitmap.xpos/8)&0x1f];
			}
			else
			if ((video.bitmap.ypos&0xf)<8)
			{ // lcdtest, of course still some registers not known, my gamate doesn't display bottom lines; most likely problematic 200 warp around hardware! no real usage
				int yi=(y+(video.bitmap.ypos&0xf)-8);
				if (yi<0)
					yi=video.bitmap.ypos+y; // in this case only 2nd plane used!?, source of first plane?
				d1=video.bitmap.data[0][yi][(j+video.bitmap.xpos/8)&0x1f]; // value of lines bevor 0 chaos
				d2=video.bitmap.data[1][yi][(j+video.bitmap.xpos/8)&0x1f];
			}
			else
			{
				d1=video.bitmap.data[0][y][(j+video.bitmap.xpos/8)&0x1f];
				d2=video.bitmap.data[1][y][(j+video.bitmap.xpos/8)&0x1f];
			}
			BlitPlane(&bitmap.pix16(y, x+4), d1, d2);
			BlitPlane(&bitmap.pix16(y, x), d1>>4, d2>>4);
		}
	}
	return 0;
}

DRIVER_INIT_MEMBER(gamate_state,gamate)
{
	memset(&video, 0, sizeof(video));/* memset(m_ram, 0, sizeof(m_ram));*/
	timer1 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gamate_state::gamate_timer),this));
	timer2 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gamate_state::gamate_timer2),this));
}


void gamate_state::machine_start()
{
	m_cart_ptr = memregion("maincpu")->base() + 0x6000;
	if (m_cart->exists())
	{
//      m_maincpu->space(AS_PROGRAM).install_read_handler(0x6000, 0x6000, READ8_DELEGATE(gamate_state, gamate_cart_protection_r));
		m_cart_ptr = m_cart->get_rom_base();
		m_bankmulti->set_base(m_cart->get_rom_base()+1);
		m_bank->set_base(m_cart->get_rom_base()+0x4000); // bankswitched games in reality no offset
	}
//  m_bios[0xdf1]=0xea; m_bios[0xdf2]=0xea; // default bios: $47 protection readback
	card_protection.set=false;
	bank_multi=0;
	card_protection.unprotected=false;
	timer2->enable(TRUE);
	timer2->reset(m_maincpu->cycles_to_attotime(1000));
#if 0
	save_item(NAME(m_video.data));
	save_item(NAME(m_video.index));
	save_item(NAME(m_video.x));
	save_item(NAME(m_video.y));
	save_item(NAME(m_video.mode));
	save_item(NAME(m_video.delayed));
	save_item(NAME(m_video.pixels));
	save_item(NAME(m_ports));
	save_item(NAME(m_ram));
#endif
}

TIMER_CALLBACK_MEMBER(gamate_state::gamate_timer)
{
	m_maincpu->set_input_line(M6502_IRQ_LINE, CLEAR_LINE);
	timer1->enable(FALSE);
}

TIMER_CALLBACK_MEMBER(gamate_state::gamate_timer2)
{
	m_maincpu->set_input_line(M6502_IRQ_LINE, ASSERT_LINE);
	timer1->enable(TRUE);
	timer1->reset(m_maincpu->cycles_to_attotime(10/* cycles short enought to clear irq line early enough*/));
	timer2->enable(TRUE);
	timer2->reset(m_maincpu->cycles_to_attotime(32768/2));
}


INTERRUPT_GEN_MEMBER(gamate_state::gamate_interrupt)
{
}

static MACHINE_CONFIG_START( gamate, gamate_state )
	MCFG_CPU_ADD("maincpu", M6502, 4433000/2)
	MCFG_CPU_PROGRAM_MAP(gamate_mem)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", gamate_state,  gamate_interrupt)

	MCFG_SCREEN_ADD("screen", LCD)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_SIZE(160, 152)
	MCFG_SCREEN_VISIBLE_AREA(0, 160-1, 0, 152-1)
	MCFG_SCREEN_UPDATE_DRIVER(gamate_state, screen_update_gamate)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_PALETTE_ADD("palette", ARRAY_LENGTH(gamate_colors))
	MCFG_PALETTE_INIT_OWNER(gamate_state, gamate)
	MCFG_DEFAULT_LAYOUT(layout_lcd)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
	MCFG_SOUND_ADD("custom", GAMATE_SND, 4433000/2)
	MCFG_SOUND_ROUTE(0, "lspeaker", 0.50)
	MCFG_SOUND_ROUTE(1, "rspeaker", 0.50)

	MCFG_GENERIC_CARTSLOT_ADD("cartslot", generic_linear_slot, "gamate_cart")
	MCFG_SOFTWARE_LIST_ADD("cart_list","gamate")
MACHINE_CONFIG_END


/* ROM notes:
gamate_bios_umc.bin is called UMC or NCR ICASC00002
gamate_bios_bit.bin is called BIT ICASC00001
So basically the UMC UA6588F and NCR 81489 CPU's contains the ICASC00002 bios
while the BIT branded CPU contains the ICASC00001 bios.
They're compatible, but for completeness its nice to have both.
Note i have 8 gamate consoles (dated 1990 though 1993) which has the gamate_bios_umc.bin in it
and only 1 dated 1994 which has the gamate_bios_bit.bin in it, so the former seems much more common.
We dumped the BIOS from all our Gamate consoles, and all except one were
identical (SHA1:ea449dc607601f9a68d855ad6ab53800d2e99297):
Gamate_BIOS_9027__9002008__UMC_UA6588F_9027S_606700.bin
Gamate_BIOS_9027__9142222__UMC_UA6588F_9027S_606700.bin
Gamate_BIOS_9027__unknown__UMC_UA6588F_9027S_606690.bin
Gamate_BIOS_9031__9009719__NCR_81489_BIT_WS39323F_ICASC00002_F841400_R9031.bin
Gamate_BIOS_9038__9145157__NCR_81489_BIT_WS39323F_ICASC00002_F842247_N9038.bin
One console, with an unknown serial number, has an updated BIOS
(SHA1:4e9dfbfe916ca485530ef4221593ab68738e2217):
This console appears to have been manufactured in 1994, based on the date markings on the RAM chips,
as well as the PCB.
*/
ROM_START(gamate)
	ROM_REGION(0x10000,"maincpu", 0)
	ROM_SYSTEM_BIOS(0, "default", "DEFAULT")
	ROMX_LOAD("gamate_bios_umc.bin", 0xf000, 0x1000, CRC(07090415) SHA1(ea449dc607601f9a68d855ad6ab53800d2e99297), ROM_BIOS(1) )
	ROM_SYSTEM_BIOS(1, "newer", "NEWER")
	ROMX_LOAD("gamate_bios_bit.bin", 0xf000, 0x1000, CRC(03a5f3a7) SHA1(4e9dfbfe916ca485530ef4221593ab68738e2217), ROM_BIOS(2) )
ROM_END


/*    YEAR  NAME     PARENT  COMPAT    MACHINE  INPUT   CLASS         INIT      COMPANY    FULLNAME */
CONS( 1990, gamate,  0,      0,        gamate,  gamate, gamate_state, gamate, "Bit Corp", "Gamate", 0)