/*  Konami Cobra System
*/

#define ADDRESS_MAP_MODERN

#include "emu.h"
#include "cpu/powerpc/ppc.h"
#include "machine/pci.h"
#include "machine/idectrl.h"
#include "video/poly.h"
#include "sound/rf5c400.h"

#define ENABLE_MAIN_CPU		1
#define ENABLE_SUB_CPU		1
#define ENABLE_GFX_CPU		1

typedef struct
{
	poly_vertex v[3];
} POLYENTRY;

static int texture_width = 128;
static int texture_height = 8;

static UINT32 gfx_texture[4096];

class cobra_state : public driver_device
{
public:
	cobra_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_subcpu(*this, "subcpu"),
		m_gfxcpu(*this, "gfxcpu")
	{ }

	required_device<cpu_device> m_maincpu;
	required_device<cpu_device> m_subcpu;
	required_device<cpu_device> m_gfxcpu;

	DECLARE_READ64_MEMBER(main_comram_r);
	DECLARE_WRITE64_MEMBER(main_comram_w);
	DECLARE_READ64_MEMBER(main_fifo_r);
	DECLARE_WRITE64_MEMBER(main_fifo_w);
	DECLARE_READ32_MEMBER(sub_comram_r);
	DECLARE_WRITE32_MEMBER(sub_comram_w);
	DECLARE_READ32_MEMBER(sub_sound_r);
	DECLARE_WRITE32_MEMBER(sub_sound_w);
	DECLARE_WRITE32_MEMBER(sub_debug_w);
	DECLARE_READ32_MEMBER(sub_unk1_r);
	DECLARE_WRITE32_MEMBER(sub_unk1_w);
	DECLARE_READ32_MEMBER(sub_config_r);
	DECLARE_WRITE32_MEMBER(sub_config_w);
	DECLARE_READ32_MEMBER(sub_mainbd_r);
	DECLARE_WRITE32_MEMBER(sub_mainbd_w);
	DECLARE_WRITE64_MEMBER(gfx_fifo0_w);
	DECLARE_WRITE64_MEMBER(gfx_fifo1_w);
	DECLARE_WRITE64_MEMBER(gfx_fifo2_w);
	DECLARE_WRITE64_MEMBER(gfx_debug_state_w);
	DECLARE_READ64_MEMBER(gfx_unk1_r);
	DECLARE_WRITE64_MEMBER(gfx_unk1_w);
	DECLARE_READ64_MEMBER(gfx_fifo_r);
	DECLARE_WRITE64_MEMBER(gfx_buf_w);


	bitmap_t *framebuffer;
	poly_manager *poly;

	int polybuffer_ptr;

	POLYENTRY polybuffer[4096];
};

#if 0
static void render_scan(void *dest, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid)
{
	bitmap_t *destmap = (bitmap_t *)dest;
	UINT32 *fb = BITMAP_ADDR32(destmap, scanline, 0);
	int x;

	for (x = extent->startx; x < extent->stopx; x++)
	{
		fb[x] = 0xffff0000;
	}
}
#endif

static void render_texture_scan(void *dest, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid)
{
	bitmap_t *destmap = (bitmap_t *)dest;
	float u = extent->param[0].start;
	float v = extent->param[1].start;
	float du = extent->param[0].dpdx;
	float dv = extent->param[1].dpdx;
	UINT32 *fb = BITMAP_ADDR32(destmap, scanline, 0);
	int x;

	for (x = extent->startx; x < extent->stopx; x++)
	{
		int iu, iv;
		UINT32 texel;

		iu = (int)(u * texture_width);
		iv = (int)(v * texture_height);

		texel = gfx_texture[((iv * texture_width) + iu) / 2];

		if (iu & 1)
		{
			texel &= 0xffff;
		}
		else
		{
			texel >>= 16;
		}

		fb[x] = texel ? 0xffffffff : 0xff000000;

		u += du;
		v += dv;
	}
}


static void cobra_video_exit(running_machine *machine)
{
	cobra_state *cobra = machine->driver_data<cobra_state>();

	poly_free(cobra->poly);
}

VIDEO_START( cobra )
{
	cobra_state *cobra = machine.driver_data<cobra_state>();

	cobra->poly = poly_alloc(machine, 4000, 10, POLYFLAG_ALLOW_QUADS);
	machine.add_notifier(MACHINE_NOTIFY_EXIT, machine_notify_delegate(FUNC(cobra_video_exit), &machine));

	cobra->framebuffer = auto_bitmap_alloc(machine, 64*8, 32*8, BITMAP_FORMAT_RGB32);
}

SCREEN_UPDATE( cobra )
{
	cobra_state *cobra = screen->machine().driver_data<cobra_state>();

	if (cobra->polybuffer_ptr > 0)
	{
		int i;

		for (i=0; i < cobra->polybuffer_ptr; i++)
		{
			poly_render_triangle(cobra->poly, cobra->framebuffer, &screen->machine().primary_screen->visible_area(), render_texture_scan, 2,
								 &cobra->polybuffer[i].v[0], &cobra->polybuffer[i].v[1], &cobra->polybuffer[i].v[2]);
			poly_wait(cobra->poly, "Finished render");
		}
		cobra->polybuffer_ptr = 0;
	}

	copybitmap_trans(bitmap, cobra->framebuffer, 0, 0, 0, 0, cliprect, 0);
	return 0;
}









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

static UINT32 *comram[2];
static int comram_page = 0;

static UINT8 gfx_unk_flag;

static int main_debug_state = 0;
static int main_debug_state_wc = 0;
static int sub_debug_state = 0;
static int sub_debug_state_wc = 0;
static int gfx_debug_state = 0;
static int gfx_debug_state_wc = 0;

static int decode_debug_state_value(int v)
{
	switch (v)
	{
		case 0x01: return 0;
		case 0xcf: return 1;
		case 0x92: return 2;
		case 0x86: return 3;
		case 0xcc: return 4;
		case 0xa4: return 5;
		case 0xa0: return 6;
		case 0x8d: return 7;
		case 0x80: return 8;
		case 0x84: return 9;
		case 0x88: return 10;
		case 0xe0: return 11;
		case 0xb1: return 12;
		case 0xc2: return 13;
		case 0xb0: return 14;
		case 0xb8: return 15;
		default: return 0;
	}
}


#define MAX_FIFOS	32

static void fifo_init(running_machine &machine, int id, int size, const char *name, int debug);
static void fifo_push(const device_t *cpu, int id, UINT64 data);
static int fifo_pop(const device_t *cpu, int id, UINT64 *result);
static int fifo_pop_float(const device_t *cpu, int id, float *result);
//static UINT64 fifo_peek_top(int id);
//static UINT64 fifo_peek_next(int id);
static int fifo_current_num(int id);
static int fifo_space_left(int id);

typedef struct
{
	UINT64 *data;
	int fifo_size;
	int fifo_wpos;
	int fifo_rpos;
	int fifo_num;
	int verbose;
	char *name;
} FIFO;

static FIFO fifo[MAX_FIFOS];

static void fifo_init(running_machine &machine, int id, int size, const char *name, int verbose)
{
	fifo[id].data = auto_alloc_array(machine, UINT64, size);
	fifo[id].fifo_wpos = 0;
	fifo[id].fifo_rpos = 0;
	fifo[id].fifo_num = 0;
	fifo[id].fifo_size = size;

	fifo[id].verbose = verbose;
	fifo[id].name = (char*)name;
}

static void fifo_push(const device_t *cpu, int id, UINT64 data)
{
	if (fifo[id].verbose)
	{
		char accessor_location[50];
		if (cpu != NULL)
		{
			// cpu has a name and a PC
			sprintf(accessor_location, "(%s) %08X", cpu->tag(), cpu_get_pc((device_t *)cpu));
		}
		else
		{
			// non-cpu
			sprintf(accessor_location, "(non-cpu)");
		}

		printf("%s: push %08X%08X (%d) at %s\n", fifo[id].name, (UINT32)(data >> 32), (UINT32)(data), fifo[id].fifo_num, accessor_location);
	}

	if (fifo[id].fifo_num == fifo[id].fifo_size)
	{
		int i, j;
		char accessor_location[50];
		if (cpu != NULL)
		{
			// cpu has a name and a PC
			sprintf(accessor_location, "(%s) %08X", cpu->tag(), cpu_get_pc((device_t *)cpu));
		}
		else
		{
			// non-cpu
			sprintf(accessor_location, "(non-cpu)");
		}

		printf("%s overflow at %s\n", fifo[id].name, accessor_location);
		printf("%s dump:\n", fifo[id].name);

		for (j=0; j < 128; j+=4)
		{
			printf("    ");
			for (i=0; i < 4; i++)
			{
				UINT64 val;
				fifo_pop(cpu, id, &val);
				printf("%08X ", (UINT32)(val));
			}
			printf("\n");
		}

		logerror("\n");
		return;
	}

	fifo[id].data[fifo[id].fifo_wpos] = data;

	fifo[id].fifo_wpos++;

	if (fifo[id].fifo_wpos == fifo[id].fifo_size)
	{
		fifo[id].fifo_wpos = 0;
	}

	fifo[id].fifo_num++;
}

static int fifo_pop(const device_t *cpu, int id, UINT64 *result)
{
	UINT64 r;

	if (fifo[id].fifo_num == 0)
	{
		char accessor_location[50];
		if (cpu != NULL)
		{
			// cpu has a name and a PC
			sprintf(accessor_location, "(%s) %08X", cpu->tag(), cpu_get_pc((device_t *)cpu));
		}
		else
		{
			// non-cpu
			sprintf(accessor_location, "(non-cpu)");
		}

		logerror("%s underflow at %s\n", fifo[id].name, accessor_location);
		return 0;
	}

	r = fifo[id].data[fifo[id].fifo_rpos];

	if (fifo[id].verbose)
	{
		char accessor_location[50];
		if (cpu != NULL)
		{
			// cpu has a name and a PC
			sprintf(accessor_location, "(%s) %08X", cpu->tag(), cpu_get_pc((device_t *)cpu));
		}
		else
		{
			// non-cpu
			sprintf(accessor_location, "(non-cpu)");
		}

		printf("%s: pop %08X%08X (%d) at %s\n", fifo[id].name, (UINT32)(r >> 32), (UINT32)(r), fifo[id].fifo_num-1, accessor_location);
	}

	fifo[id].fifo_rpos++;

	if (fifo[id].fifo_rpos == fifo[id].fifo_size)
	{
		fifo[id].fifo_rpos = 0;
	}

	fifo[id].fifo_num--;

	*result = r;

	return 1;
}

static int fifo_pop_float(const device_t *cpu, int id, float *result)
{
	UINT64 value;
	int status = fifo_pop(cpu, id, &value);
	*result = u2f((UINT32)(value));
	return status;
}

/*static UINT64 fifo_peek_top(int id)
{
    return fifo[id].data[fifo[id].fifo_rpos];
}

static UINT64 fifo_peek_next(int id)
{
    int pos = fifo[id].fifo_rpos + 1;

    if (pos == fifo[id].fifo_size)
    {
        pos = 0;
    }

    return fifo[id].data[pos];
}*/

static int fifo_current_num(int id)
{
	return fifo[id].fifo_num;
}

static int fifo_space_left(int id)
{
	return fifo[id].fifo_size - fifo[id].fifo_num;
}

static int fifo_is_empty(int id)
{
	return (fifo[id].fifo_num == 0) ? 1 : 0;
}

static int fifo_is_half_full(int id)
{
	return (fifo[id].fifo_num > (fifo[id].fifo_size / 2)) ? 1 : 0;
}

static int fifo_is_full(int id)
{
	return (fifo[id].fifo_num >= fifo[id].fifo_size) ? 1 : 0;
}

static void fifo_flush(int id)
{
	fifo[id].fifo_num = 0;
	fifo[id].fifo_rpos = 0;
	fifo[id].fifo_wpos = 0;
}


// FIFO id's

#define GFXFIFO_IN				0
#define GFXFIFO_OUT				1
#define M2SFIFO					2		// main to sub FIFO
#define S2MFIFO					3		// sub to main FIFO

#define GFXFIFO_IN_VERBOSE		1
#define GFXFIFO_OUT_VERBOSE		1
#define M2SFIFO_VERBOSE			0
#define S2MFIFO_VERBOSE			0


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

/*****************************************************************************/
// Main board (PPC603)

// MPC106 mem settings:
// Bank 0: start 0x00, end 0x7f
// Bank 1: start 0x81, end 0x81
// Bank 2: start 0x82, end 0x82
// Bank 3: start 0x83, end 0x83
// Bank 4: start 0x84, end 0x84
// Bank 5: start 0x85, end 0x85
// Bank 6: start 0x86, end 0x86
// Bank 7: start 0x87, end 0x87

// IBAT0 U: 0xfff00003 L: 0xfff00001    (0xfff00000, 128K)
// IBAT1 U: 0x0000007f L: 0x00000001    (0x00000000, 4MB)
// IBAT2 U: 0x0040007f L: 0x07c00001    (0x07c00000, 4MB)
// IBAT3 U: 0x00000000 L: 0x00000001    unused
// DBAT0 U: 0xfff0001f L: 0xfff0002a    (0xfff00000, 1MB)
// DBAT1 U: 0x0000007f L: 0x00000002    (0x00000000, 4MB)
// DBAT2 U: 0x0040007f L: 0x07c00002    (0x07c00000, 4MB)
// DBAT3 U: 0xc0000fff L: 0xc0000002    (0xc0000000, 128MB)

// RPA: 0x8010C000

#if ENABLE_MAIN_CPU

static int m2sfifo_unk_flag = 0;
static int s2mfifo_unk_flag = 0;

static UINT32 mpc106_regs[256/4];
static UINT32 mpc106_pci_r(int function, int reg, UINT32 mem_mask)
{
	//printf("MPC106: PCI read %d, %02X, %08X\n", function, reg, mem_mask);

	switch (reg)
	{
	}

	return mpc106_regs[reg/4];
}

static void mpc106_pci_w(int function, int reg, UINT32 data, UINT32 mem_mask)
{
	//printf("MPC106: PCI write %d, %02X, %08X, %08X\n", function, reg, data, mem_mask);
	COMBINE_DATA(mpc106_regs + (reg/4));
}

static READ64_DEVICE_HANDLER(main_mpc106_r)
{
	//return pci_64be_r(offset, mem_mask);
	return pci_64be_r(device, offset, mem_mask);
}

static WRITE64_DEVICE_HANDLER(main_mpc106_w)
{
	//pci_64be_w(offset, data, mem_mask);
	pci_64be_w(device, offset, data, mem_mask);
}

READ64_MEMBER(cobra_state::main_fifo_r)
{
	UINT64 r = 0;

	if (ACCESSING_BITS_56_63)
	{
		// Register 0xffff0000:
		// Main-to-Sub FIFO status register
		// Sub-to-Main FIFO status register
		//
		// 7 6 5 4 3 2 1 0
		//----------------
		//               x      M2S FIFO full flag
		//             x        M2S FIFO empty flag
		//           x          M2S FIFO half-full flag
		//       x              S2M FIFO full flag
		//     x                S2M FIFO empty flag
		//   x                  S2M FIFO half-full flag

		int value = 0x00;
		value |= fifo_is_full(M2SFIFO) ? 0x00 : 0x01;
		value |= fifo_is_empty(M2SFIFO) ? 0x00 : 0x02;
		value |= fifo_is_half_full(M2SFIFO) ? 0x00 : 0x04;

		value |= fifo_is_full(S2MFIFO) ? 0x00 : 0x10;
		value |= fifo_is_empty(S2MFIFO) ? 0x00 : 0x20;
		value |= fifo_is_half_full(S2MFIFO) ? 0x00 : 0x40;

		value |= comram_page ? 0x80 : 0x00;

		r |= (UINT64)(value) << 56;
	}
	if (ACCESSING_BITS_48_55)
	{
		// Register 0xffff0001:
		// Sub board FIFO unknown register
	}
	if (ACCESSING_BITS_40_47)
	{
		// Register 0xffff0002:
		// Sub-to-Main FIFO read data

		UINT64 value;
		fifo_pop(&space.device(), S2MFIFO, &value);

		if (fifo_is_empty(S2MFIFO))
		{
			s2mfifo_unk_flag = 1;
		}
		else if (fifo_is_full(S2MFIFO))
		{
			s2mfifo_unk_flag = 0;
		}

		r |= (UINT64)(value & 0xff) << 40;
	}
	if (ACCESSING_BITS_32_39)
	{
		// Register 0xffff0003:
		//
		// 7 6 5 4 3 2 1 0
		//----------------
		//             x     S2M FIFO unknown flag
		//           x       Graphics board/FIFO busy flag
		//         x         M2S FIFO unknown flag

		int value = 0x01;
		//value |= s2mfifo_unk_flag ? 0x2 : 0x0;

		if (fifo_is_empty(S2MFIFO))
		{
			value |= 0x2;
		}
		else if (!fifo_is_full(S2MFIFO) && !fifo_is_half_full(S2MFIFO))
		{
			//value |= s2mfifo_unk_flag ? 0x2 : 0x0;
		}

		value |= m2sfifo_unk_flag ? 0x8 : 0x0;

		value |= (gfx_unk_flag & 0x80) ? 0x00 : 0x04;

		r |= (UINT64)(value) << 32;
	}

	return r;
}

WRITE64_MEMBER(cobra_state::main_fifo_w)
{
	if (ACCESSING_BITS_40_47)
	{
		// Register 0xffff0002:
		// Main-to-Sub FIFO write data

		//printf("MAIN: M2S FIFO data write %02X\n", (UINT8)(data >> 40) & 0xff);

		fifo_push(&space.device(), M2SFIFO, (UINT8)(data >> 40));

		cputag_set_input_line(space.machine(), "subcpu", INPUT_LINE_IRQ0, ASSERT_LINE);

		// this is a hack...
		// MAME has a small interrupt latency, which prevents the IRQ bit from being set in
		// the EXISR at the same time as the FIFO status updates.....
		cpu_set_reg(m_subcpu, PPC_EXISR, cpu_get_reg(m_subcpu, PPC_EXISR) | 0x10);
	}
	if (ACCESSING_BITS_32_39)
	{
		// Register 0xffff0003:
		// Main-to-Sub FIFO unknown

		if (!fifo_is_empty(M2SFIFO))
		{
			if (fifo_is_half_full(M2SFIFO))
			{
				m2sfifo_unk_flag = 0x8;
			}
			else
			{
				m2sfifo_unk_flag = ((data >> 32) & 0x8) ? 0 : 1;
			}
		}
		else
		{
			m2sfifo_unk_flag = 0x0;
		}

		comram_page = ((data >> 32) & 0x80) ? 1 : 0;
	}

	// Register 0xffff0000,1
	// Debug state write

	if (ACCESSING_BITS_56_63)
	{
		main_debug_state |= decode_debug_state_value((data >> 56) & 0xff) << 4;
		main_debug_state_wc++;
	}
	if (ACCESSING_BITS_48_55)
	{
		main_debug_state |= decode_debug_state_value((data >> 48) & 0xff);
		main_debug_state_wc++;
	}

	if (main_debug_state_wc >= 2)
	{
		if (main_debug_state != 0)
		{
			printf("MAIN: debug state %02X\n", main_debug_state);
		}

		main_debug_state = 0;
		main_debug_state_wc = 0;
	}
}

READ64_MEMBER(cobra_state::main_comram_r)
{
	UINT64 r = 0;
	int page = comram_page;

	if (ACCESSING_BITS_32_63)
	{
		r |= (UINT64)(comram[page][(offset << 1) + 0]) << 32;
	}
	if (ACCESSING_BITS_0_31)
	{
		r |= (UINT64)(comram[page][(offset << 1) + 1]);
	}

	return r;
}

WRITE64_MEMBER(cobra_state::main_comram_w)
{
	int page = comram_page;

	UINT32 w1 = comram[page][(offset << 1) + 0];
	UINT32 w2 = comram[page][(offset << 1) + 1];
	UINT32 d1 = (UINT32)(data >> 32);
	UINT32 d2 = (UINT32)(data);
	UINT32 m1 = (UINT32)(mem_mask >> 32);
	UINT32 m2 = (UINT32)(mem_mask);

	comram[page][(offset << 1) + 0] = (w1 & m1) | (d1 & ~m1);
	comram[page][(offset << 1) + 1] = (w2 & m2) | (d2 & ~m2);
}

static ADDRESS_MAP_START( cobra_main_map, AS_PROGRAM, 64, cobra_state )
	AM_RANGE(0x00000000, 0x003fffff) AM_RAM
	AM_RANGE(0x07c00000, 0x07ffffff) AM_RAM
	AM_RANGE(0x80000cf8, 0x80000cff) AM_DEVREADWRITE_LEGACY("pcibus", main_mpc106_r, main_mpc106_w)
	AM_RANGE(0xc0000000, 0xc03fffff) AM_RAM AM_SHARE("share1")
	AM_RANGE(0xc0400000, 0xc07fffff) AM_RAM AM_SHARE("share2")
	AM_RANGE(0xc7800000, 0xc7bfffff) AM_RAM AM_SHARE("share1")
	AM_RANGE(0xc7c00000, 0xc7ffffff) AM_RAM AM_SHARE("share2")
	AM_RANGE(0xfff00000, 0xfff7ffff) AM_ROM AM_REGION("user1", 0)		/* Boot ROM */
	AM_RANGE(0xfff80000, 0xfffbffff) AM_READWRITE(main_comram_r, main_comram_w)
	AM_RANGE(0xffff0000, 0xffff0007) AM_READWRITE(main_fifo_r, main_fifo_w)
ADDRESS_MAP_END

#endif		// ENABLE_MAIN_CPU

/*****************************************************************************/
// Sub board (PPC403)

#if ENABLE_SUB_CPU

static UINT8 sub_interrupt = 0xff;

//static int ucount = 0;

READ32_MEMBER(cobra_state::sub_unk1_r)
{
	UINT32 r = 0;

	if (ACCESSING_BITS_16_23)
	{
		r |= 0x10000;
	}

	return r;
}

WRITE32_MEMBER(cobra_state::sub_unk1_w)
{
	/*
    if (!(mem_mask & 0xff000000))
    {
        printf("%02X", data >> 24);
        ucount++;

        if (ucount >= 4)
        {
            ucount = 0;
            printf("\n");
        }
    }
    */
}

READ32_MEMBER(cobra_state::sub_mainbd_r)
{
	UINT32 r = 0;

	if (ACCESSING_BITS_24_31)
	{
		// Register 0x7E380000
		// M2S FIFO read

		UINT64 value;
		fifo_pop(&space.device(), M2SFIFO, &value);

		if (fifo_is_empty(M2SFIFO))
		{
			cputag_set_input_line(space.machine(), "subcpu", INPUT_LINE_IRQ0, CLEAR_LINE);

			// this is a hack...
			// MAME has a small interrupt latency, which prevents the IRQ bit from being cleared in
			// the EXISR at the same time as the FIFO status updates.....
			cpu_set_reg(m_subcpu, PPC_EXISR, cpu_get_reg(m_subcpu, PPC_EXISR) & ~0x10);
		}

		r |= (value & 0xff) << 24;
	}
	if (ACCESSING_BITS_16_23)
	{
		// Register 0x7E380001
		// Main-to-sub FIFO status register
		// Sub-to-main FIFO status register
		//
		// 7 6 5 4 3 2 1 0
		//----------------
		//               x    S2M FIFO full flag
		//             x      S2M FIFO empty flag
		//           x        S2M FIFO half-full flag
		//       x            M2S FIFO full flag
		//     x              M2S FIFO empty flag
		//   x                M2S FIFO half-full flag

		UINT32 value = 0x00;
		value |= fifo_is_full(S2MFIFO) ? 0x00 : 0x01;
		value |= fifo_is_empty(S2MFIFO) ? 0x00 : 0x02;
		value |= fifo_is_half_full(S2MFIFO) ? 0x00 : 0x04;

		value |= fifo_is_full(M2SFIFO) ? 0x00 : 0x10;
		value |= fifo_is_empty(M2SFIFO) ? 0x00 : 0x20;
		value |= fifo_is_half_full(M2SFIFO) ? 0x00 : 0x40;

		value |= comram_page ? 0x80 : 0x00;

		r |= (value) << 16;
	}

	return r;
}

WRITE32_MEMBER(cobra_state::sub_mainbd_w)
{
	if (ACCESSING_BITS_24_31)
	{
		// Register 0x7E380000
		// Sub-to-Main FIFO data

		fifo_push(&space.device(), S2MFIFO, (UINT8)(data >> 24));
	}
	if (ACCESSING_BITS_16_23)
	{
		// Register 0x7E380001

		if (!fifo_is_empty(S2MFIFO))
		{
			if (fifo_is_half_full(S2MFIFO))
			{
				s2mfifo_unk_flag = 1;
			}
			else
			{
				s2mfifo_unk_flag = (~(data >> 16) & 0x1);
			}
		}
		else
		{
			s2mfifo_unk_flag = 0;
		}

		if (!s2mfifo_unk_flag)
		{
			cputag_set_input_line(space.machine(), "subcpu", INPUT_LINE_IRQ1, ASSERT_LINE);

			// this is a hack...
			// MAME has a small interrupt latency, which prevents the IRQ bit from being set in
			// the EXISR at the same time as the FIFO status updates.....
			cpu_set_reg(m_subcpu, PPC_EXISR, cpu_get_reg(m_subcpu, PPC_EXISR) | 0x08);
		}
		else
		{
			cputag_set_input_line(space.machine(), "subcpu", INPUT_LINE_IRQ1, CLEAR_LINE);

			// this is a hack...
			// MAME has a small interrupt latency, which prevents the IRQ bit from being cleared in
			// the EXISR at the same time as the FIFO status updates.....
			cpu_set_reg(m_subcpu, PPC_EXISR, cpu_get_reg(m_subcpu, PPC_EXISR) & ~0x08);
		}
	}
}

WRITE32_MEMBER(cobra_state::sub_debug_w)
{
	if (ACCESSING_BITS_24_31)
	{
		sub_debug_state |= decode_debug_state_value((data >> 24) & 0xff) << 4;
		sub_debug_state_wc++;
	}
	if (ACCESSING_BITS_16_23)
	{
		sub_debug_state |= decode_debug_state_value((data >> 16) & 0xff);
		sub_debug_state_wc++;
	}

	if (sub_debug_state_wc >= 2)
	{
		if (sub_debug_state != 0)
		{
			printf("SUB: debug state %02X\n", sub_debug_state);
		}

		sub_debug_state = 0;
		sub_debug_state_wc = 0;
	}
}

READ32_MEMBER(cobra_state::sub_config_r)
{
	UINT32 r = 0;

	if (ACCESSING_BITS_8_15)
	{
		r |= (0x2) << 8;		// if bit 0x2 is zero, maskrom boot
	}
	if (ACCESSING_BITS_0_7)
	{
		r |= sub_interrupt;
	}

	return r;
}

WRITE32_MEMBER(cobra_state::sub_config_w)
{

}

static READ32_DEVICE_HANDLER(sub_ata_r)
{
	UINT32 r = 0;

	if (ACCESSING_BITS_16_31)
	{
		UINT16 v = ide_bus_r(device, 0, (offset << 1) + 0);
		r |= ((v << 8) | (v >> 8)) << 16;
	}
	if (ACCESSING_BITS_0_15)
	{
		UINT16 v = ide_bus_r(device, 0, (offset << 1) + 1);
		r |= ((v << 8) | (v >> 8)) << 0;
	}

	return r;
}

static WRITE32_DEVICE_HANDLER(sub_ata_w)
{
	if (ACCESSING_BITS_16_31)
	{
		ide_bus_w(device, 0, (offset << 1) + 0, (UINT16)(data >> 24));
	}
	if (ACCESSING_BITS_0_15)
	{
		ide_bus_w(device, 0, (offset << 1) + 1, (UINT16)(data >> 8));
	}
}

READ32_MEMBER(cobra_state::sub_comram_r)
{
	int page = comram_page ^ 1;

	return comram[page][offset];
}

WRITE32_MEMBER(cobra_state::sub_comram_w)
{
	int page = comram_page ^ 1;

	COMBINE_DATA(comram[page] + offset);
}

READ32_MEMBER(cobra_state::sub_sound_r)
{
	UINT32 r = 0;

	/*
    if (!(mem_mask & 0xffff0000))
    {
        r |= RF5C400_0_r((offset << 1) + 0, 0x0000);
    }
    if (!(mem_mask & 0x0000ffff))
    {
        r |= RF5C400_0_r((offset << 1) + 1, 0x0000);
    }
    */

	return r;
}

WRITE32_MEMBER(cobra_state::sub_sound_w)
{
	/*
    if (!(mem_mask & 0xffff0000))
    {
        RF5C400_0_w((offset << 1) + 0, (UINT16)(data >> 16), 0x0000);
    }
    if (!(mem_mask & 0x0000ffff))
    {
        RF5C400_0_w((offset << 1) + 1, (UINT16)(data), 0x0000);
    }
    */
}

static ADDRESS_MAP_START( cobra_sub_map, AS_PROGRAM, 32, cobra_state )
	AM_RANGE(0x00000000, 0x003fffff) AM_MIRROR(0x80000000) AM_RAM
	AM_RANGE(0x70000000, 0x7003ffff) AM_MIRROR(0x80000000) AM_READWRITE(sub_comram_r, sub_comram_w)
	AM_RANGE(0x78040000, 0x7804ffff) AM_MIRROR(0x80000000) AM_READWRITE(sub_sound_r, sub_sound_w)
	AM_RANGE(0x78080000, 0x7808000f) AM_MIRROR(0x80000000) AM_DEVREADWRITE_LEGACY("ide", sub_ata_r, sub_ata_w)
	AM_RANGE(0x7e000000, 0x7e000003) AM_MIRROR(0x80000000) AM_WRITE(sub_debug_w)
	AM_RANGE(0x7e180000, 0x7e180003) AM_MIRROR(0x80000000) AM_READWRITE(sub_unk1_r, sub_unk1_w)
	AM_RANGE(0x7e200000, 0x7e200003) AM_MIRROR(0x80000000) AM_READWRITE(sub_config_r, sub_config_w)
	AM_RANGE(0x7e380000, 0x7e380003) AM_MIRROR(0x80000000) AM_READWRITE(sub_mainbd_r, sub_mainbd_w)
	AM_RANGE(0x7ff80000, 0x7fffffff) AM_MIRROR(0x80000000) AM_ROM AM_REGION("user2", 0)		/* Boot ROM */
ADDRESS_MAP_END

#endif		// ENABLE_SUB_CPU

/*****************************************************************************/
// Graphics board (PPC604)

// MPC106 mem settings:
// Bank 0: start 0x00, end 0x7f
// Bank 1: start 0x81, end 0x81
// Bank 2: start 0x82, end 0x82
// Bank 3: start 0x83, end 0x83
// Bank 4: start 0x84, end 0x84
// Bank 5: start 0x100, end 0x13f
// Bank 6: start 0x180, end 0x1bf
// Bank 7: start 0x1e0, end 0x1ef

// IBAT0 U: 0xfff00003 L: 0xfff00001    (0xfff00000, 0xfff00000, 128KB)
// IBAT1 U: 0x0000007f L: 0x00000001    (0x00000000, 0x00000000, 4MB)
// IBAT2 U: 0x0040007f L: 0x07c00001    (0x00400000, 0x07c00000, 4MB)
// IBAT3 U: 0x00000000 L: 0x00000001    unused
// DBAT0 U: 0xfff0001f L: 0xfff0002a    (0xfff00000, 0xfff00000, 1MB)
// DBAT1 U: 0x0000007f L: 0x00000002    (0x00000000, 0x00000000, 4MB)
// DBAT2 U: 0x0040007f L: 0x07c00002    (0x00400000, 0x07c00000, 4MB)
// DBAT3 U: 0xf8fe0003 L: 0xf8fe002a    (0xf8fe0000, 0xf8fe0000, 128KB)

// DBAT3 U: 0x10001fff L: 0x1000000a    (0x10000000, 0x10000000, 256MB)

// SR0:  0x00000000  SR1:  0x00000001  SR2:  0x00000002  SR3:  0x00000003
// SR4:  0x00000004  SR5:  0x00000005  SR6:  0x00000006  SR7:  0x00000007
// SR8:  0x00000008  SR9:  0x00000009  SR10: 0x0000000a  SR11: 0x0000000b
// SR12: 0x0000000c  SR13: 0x0000000d  SR14: 0x0000000e  SR15: 0x0000000f

#if ENABLE_GFX_CPU

static int gfx_fifo_loopback = 0;
//static UINT32 gfx_unk_reg[512];

static UINT8 *gfx_gram;

static UINT64 gfx_fifo_mem[4];
static int gfx_fifo_cache_addr = 0;

static int gfx_register_select = 0;
static UINT64 gfx_register[0x3000];


#define RE_STATUS_IDLE			0
#define RE_STATUS_COMMAND		1

static int gfx_re_status = RE_STATUS_IDLE;
static int gfx_re_command_word1;
static int gfx_re_command_word2;
static int gfx_re_word_count;

static void push_poly(cobra_state *cobra, poly_vertex *v1, poly_vertex *v2, poly_vertex *v3)
{
	memcpy(&cobra->polybuffer[cobra->polybuffer_ptr].v[0], v1, sizeof(poly_vertex));
	memcpy(&cobra->polybuffer[cobra->polybuffer_ptr].v[1], v2, sizeof(poly_vertex));
	memcpy(&cobra->polybuffer[cobra->polybuffer_ptr].v[2], v3, sizeof(poly_vertex));

	cobra->polybuffer_ptr++;

	if (cobra->polybuffer_ptr >= 4096)
	{
		logerror("push_poly() overflow\n");
	}
}

static void cobra_gfx_init(running_machine *machine)
{
	//gfx_gram = auto_malloc(0x100000);
	gfx_gram = auto_alloc_array(*machine, UINT8, 0x100000);
}

static void gfx_fifo_exec(cobra_state *cobra)
{
	if (gfx_fifo_loopback != 0)
		return;

	while (fifo_current_num(GFXFIFO_IN) >= 2)
	{
		UINT64 in1, in2;
		UINT32 w1, w2;

		if (gfx_re_status == RE_STATUS_IDLE)
		{
			fifo_pop(NULL, GFXFIFO_IN, &in1);
			fifo_pop(NULL, GFXFIFO_IN, &in2);
			w1 = (UINT32)(in1);
			w2 = (UINT32)(in2);

			gfx_re_command_word1 = w1;
			gfx_re_command_word2 = w2;
			gfx_re_word_count = 0;

			gfx_re_status = RE_STATUS_COMMAND;
		}
		else
		{
			w1 = gfx_re_command_word1;
			w2 = gfx_re_command_word2;
		}

	//  fifo_pop(GFXFIFO_IN, &in1);
	//  fifo_pop(GFXFIFO_IN, &in2);

	//  in1 = fifo_peek_top(GFXFIFO_IN);
	//  in2 = fifo_peek_next(GFXFIFO_IN);

	//  w1 = (UINT32)(in1);
	//  w2 = (UINT32)(in2);

		switch ((w1 >> 24) & 0xff)
		{
			case 0x00:
			{
				UINT64 param[6];
				UINT32 w[6];

				if (fifo_current_num(GFXFIFO_IN) < 6)
				{
					// wait until there's enough data in FIFO
					return;
				}

				fifo_pop(NULL, GFXFIFO_IN, &param[0]);
				fifo_pop(NULL, GFXFIFO_IN, &param[1]);
				fifo_pop(NULL, GFXFIFO_IN, &param[2]);
				fifo_pop(NULL, GFXFIFO_IN, &param[3]);
				fifo_pop(NULL, GFXFIFO_IN, &param[4]);
				fifo_pop(NULL, GFXFIFO_IN, &param[5]);

				w[0] = (UINT32)param[0];	w[1] = (UINT32)param[1];	w[2] = (UINT32)param[2];
				w[3] = (UINT32)param[3];	w[4] = (UINT32)param[4];	w[5] = (UINT32)param[5];

				// mbuslib_pumpkin(): 0x00600000 0x10500010
				//                    0x00600000 0x10500018

				if (w2 == 0x10500010)
				{
					// GFX register select?
					gfx_register_select = w[3];		// word 3 is the only non-zero so far...

					printf("GFX: register select %04X\n", gfx_register_select);
				}
				else if (w2 == 0x10500018)
				{
					// register write to the register selected above?
					// 64-bit registers, top 32-bits in word 2, low 32-bit in word 3
					printf("GFX: register write %04X: %08X %08X\n", gfx_register_select, w[2], w[3]);

					gfx_register[gfx_register_select] = ((UINT64)(w[2]) << 32) | w[3];
				}
				else if (w2 == 0x10521000)
				{
					printf("gfxfifo_exec: unknown %08X %08X %08X %08X\n", w1, w2, w[0], w[1]);
					printf("                      %08X %08X %08X %08X\n", w[2], w[3], w[4], w[5]);
				}
				else
				{
					logerror("gfxfifo_exec: unknown %08X %08X\n", w1, w2);
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}
			case 0x0f:
			case 0xf0:
			{
				UINT64 in3, in4, ignore;

				// check_mergebus_self(): 0x0F600000 0x10520C00

				if (fifo_current_num(GFXFIFO_IN) < 6)
				{
					// wait until there's enough data in FIFO
					return;
				}

				if (w1 != 0x0f600000 && w1 != 0xf0600000)
				{
					logerror("gfxfifo_exec: unknown %08X %08X\n", w1, w2);
				}

				printf("gfxfifo_exec: unhandled %08X %08X\n", w1, w2);

				fifo_pop(NULL, GFXFIFO_IN, &in3);
				fifo_pop(NULL, GFXFIFO_IN, &in4);
				fifo_pop(NULL, GFXFIFO_IN, &ignore);
				fifo_pop(NULL, GFXFIFO_IN, &ignore);
				fifo_pop(NULL, GFXFIFO_IN, &ignore);
				fifo_pop(NULL, GFXFIFO_IN, &ignore);

				if (w1 == 0x0f600000 && w2 == 0x10520c00)
				{
					fifo_push(NULL, GFXFIFO_OUT, w1);
					fifo_push(NULL, GFXFIFO_OUT, w2);
					fifo_push(NULL, GFXFIFO_OUT, in3);
					fifo_push(NULL, GFXFIFO_OUT, in4);
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}
			case 0x80:
			case 0xa4:
			case 0xa8:
			case 0xac:
			{
				// 0xAxxxxxxx is different form in mbuslib_regwrite()

				// mbuslib_regwrite(): 0x800000FF 0x00000001
				//                     0xa40000FF 0x00000001

				int reg = (w1 >> 8) & 0xfffff;

				gfx_gram[reg + 0] = (w2 >> 24) & 0xff;
				gfx_gram[reg + 1] = (w2 >> 16) & 0xff;
				gfx_gram[reg + 2] = (w2 >>  8) & 0xff;
				gfx_gram[reg + 3] = (w2 >>  0) & 0xff;

				if (reg != 0x118 && reg != 0x114 && reg != 0x11c)
				{
					printf("gfxfifo_exec: ram write %05X: %08X\n", reg, w2);
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}

			case 0xf1:
			case 0xf4:
			{
				printf("gfxfifo_exec: unhandled %08X %08X\n", w1, w2);

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}

			case 0xe0:
			case 0xe2:
			case 0xe3:
			{
				// E0C00004 18C003C0 - 32 params
				// E0C00004 18F803C1 - 48 params
				// E0C00003 18C003C0 - 24 params
				// E0C00008 18C003C0 - 64 params
				// E0C00001 58C003C1 - 10 params
				// E0800004 18C003C0 - 32 params
				// E3000002 58C003C1 - 20 params
				// E3000008 58C003C1 - 80 params
				// E3000005 58C003C1 - 50 params
				// E2000001 18C003C0 - 8 params
				// E2000008 18C003C0 - 64 params
				// E0C00003 38C003C1 - 30 params
				// E0C00008 38C003C1 - 80 params
				// E0C00001 78C003C0 - 10 params
				// E0800004 38C003C1 - 40 params
				// E3000002 78C003C0 - 20 params
				// E3400002 58C003C1 - 20 params
				// E0C00003 18F803C1 - 36 params
				// E0C00001 58F803C0 - 12 params

				// These seem to be 3d graphics polygon packets...
				// The low part of the first word could be number of vertices...

				int i;
				int num = 0;
				int units = w1 & 0xff;

				if (w2 == 0x18c003c0)
				{
					num = units * 8;
				}
				//else if (w2 == 0x18c003c1)
				//{
				//  num = units * 12;
				//}
				else if (w2 == 0x38c003c1 || w2 == 0x58c003c1 || w2 == 0x78c003c0)
				{
					num = units * 10;
				}
				else if (w2 == 0x18f803c1 || w2 == 0x38f803c0 || w2 == 0x58f803c0)
				{
					num = units * 12;
				}
				else if (w2 == 0x78f803c1)
				{
					num = units * 14;
				}
				else
				{
					int c = 0;
					printf("gfxfifo_exec: E0 unhandled %08X %08X\n", w1, w2);
					while (fifo_current_num(GFXFIFO_IN) > 0)
					{
						UINT64 param;
						fifo_pop(NULL, GFXFIFO_IN, &param);

						if (c == 0)
							printf("              ");
						printf("%08X ", (UINT32)(param));

						c++;

						if (c == 4)
						{
							printf("\n");
							c = 0;
						}
					};
					logerror("\n");
				}

				if (fifo_current_num(GFXFIFO_IN) < num)
				{
					// wait until there's enough data in FIFO
					return;
				}

				printf("gfxfifo_exec: unhandled %08X %08X\n", w1, w2);

				// make sure the FIFO has fresh data at top...
				fifo_flush(GFXFIFO_OUT);

				if (w1 == 0xe0c00004 && w2 == 0x18f803c1)
				{
					// Quad poly packet
					poly_vertex vert[4];

					for (i=0; i < 4; i++)
					{
						UINT64 in;
						fifo_pop_float(NULL, GFXFIFO_IN, &vert[i].x);		// X coord
						fifo_pop_float(NULL, GFXFIFO_IN, &vert[i].y);		// Y coord

						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);

						fifo_pop_float(NULL, GFXFIFO_IN, &vert[i].p[0]);	// texture U coord
						fifo_pop_float(NULL, GFXFIFO_IN, &vert[i].p[1]);	// texture V coord

						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
					}

					//poly_render_triangle(poly, framebuffer, video_screen_get_visible_area(machine->primary_screen), render_texture_scan, 2, &vert[0], &vert[1], &vert[2]);
					//poly_render_triangle(poly, framebuffer, video_screen_get_visible_area(machine->primary_screen), render_texture_scan, 2, &vert[2], &vert[1], &vert[3]);
					//poly_wait(poly, "Finished render");

					push_poly(cobra, &vert[0], &vert[1], &vert[2]);
					push_poly(cobra, &vert[2], &vert[1], &vert[3]);
				}
				else if (w1 == 0xe0c00003 && w2 == 0x18c003c0)
				{
					// Triangle poly packet?
					poly_vertex vert[3];

					for (i=0; i < 3; i++)
					{
						UINT64 in;
						fifo_pop(NULL, GFXFIFO_IN, &in);

						fifo_pop(NULL, GFXFIFO_IN, &in);

						vert[i].x = (u2f((UINT32)(in)) / 8.0f) + 256.0f;

						fifo_pop(NULL, GFXFIFO_IN, &in);

						vert[i].y = (u2f((UINT32)(in)) / 8.0f) + 192.0f;

						fifo_pop(NULL, GFXFIFO_IN, &in);

						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
						fifo_pop(NULL, GFXFIFO_IN, &in);
					}

					//poly_render_triangle(poly, framebuffer, video_screen_get_visible_area(machine->primary_screen), render_scan, 0, &vert[0], &vert[1], &vert[2]);
					//poly_wait(poly, "Finished render");

					push_poly(cobra, &vert[0], &vert[1], &vert[2]);
				}
				else
				{
					for (i=0; i < num; i+=2)
					{
						UINT64 in3, in4;
						fifo_pop(NULL, GFXFIFO_IN, &in3);
						fifo_pop(NULL, GFXFIFO_IN, &in4);
						printf("                        %08X %08X (%f, %f)\n", (UINT32)(in3), (UINT32)(in4), u2f((UINT32)(in3)), u2f((UINT32)(in4)));

						fifo_push(NULL, GFXFIFO_OUT, (UINT32)(in3));
						fifo_push(NULL, GFXFIFO_OUT, (UINT32)(in4));
					}
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}

			case 0xe8:
			{
				int num = w2;
				int i;
			//  int c=0;

				if (fifo_current_num(GFXFIFO_IN) < num)
				{
					// wait until there's enough data in FIFO
					return;
				}

				/*
                printf("gfxfifo_exec: unhandled %08X %08X\n", w1, w2);

                for (i=0; i < num; i++)
                {
                    UINT64 in3;
                    fifo_pop(GFXFIFO_IN, &in3);
                    printf("                        %08X\n", (UINT32)(in3));
                }*/

				printf("gfxfifo_exec: unhandled %08X %08X\n", w1, w2);

				for (i=0; i < num; i++)
				{
					UINT64 param;
					fifo_pop(NULL, GFXFIFO_IN, &param);

					/*if (c == 0)
                        printf("       ");
                    printf("%08X ", (UINT32)(param));

                    c++;

                    if (c == 8)
                    {
                        printf("\n");
                        c = 0;
                    }*/
				}
				//printf("\n");

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}

			case 0xe9:
			{
			//  printf("gfxfifo_exec: unhandled %08X %08X\n", w1, w2);

				/*{
                    int y = (gfx_gram[0x11c] << 8) | (gfx_gram[0x11d]);
                    int x = (gfx_gram[0x11e] << 8) | (gfx_gram[0x11f]);
                    printf("GFX: E9 on X: %d, Y: %d\n", x, y);
                }*/

				fifo_push(NULL, GFXFIFO_OUT, 0);
				fifo_push(NULL, GFXFIFO_OUT, 0);
				fifo_push(NULL, GFXFIFO_OUT, 0);
				fifo_push(NULL, GFXFIFO_OUT, 0);

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}

			case 0x8f:
			{
				// buf_flush(): 0x8FFF0000 0x00000000

				if (w1 != 0x8fff0000 || w2 != 0x00000000)
				{
					logerror("gfxfifo_exec: buf_flush: %08X %08X\n", w1, w2);
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}
			case 0xb0:
			{
				// mbuslib_pip_ints(): 0xB0300800 0x000001FE

				int reg = (w1 >> 8) & 0xfffff;
				int num = w2;
				int i;

				if (fifo_current_num(GFXFIFO_IN) < num)
				{
					return;
				}

				printf("gfxfifo_exec: pip_ints %d\n", num);

				/*
                if (reg != 0x3008)
                {
                    fatalerror("gfxfifo_exec: pip_ints: %08X %08X\n", w1, w2);
                }

                printf("gfxfifo_exec: pip_ints %d\n", num);

                for (i = 0; i < num; i++)
                {
                    UINT64 value;
                    fifo_pop(GFXFIFO_IN, &value);

                    gfx_unk_reg[i] = value;
                }
                */

				// writes to n ram location starting from x?
				for (i = 0; i < num; i++)
				{
					UINT64 value;
					fifo_pop(NULL, GFXFIFO_IN, &value);

					gfx_gram[reg + (i*4) + 0] = (value >> 24) & 0xff;
					gfx_gram[reg + (i*4) + 1] = (value >> 16) & 0xff;
					gfx_gram[reg + (i*4) + 2] = (value >>  8) & 0xff;
					gfx_gram[reg + (i*4) + 3] = (value >>  0) & 0xff;
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}
			case 0xc0:
			case 0xc4:
			case 0xc8:
			case 0xcc:
			{
				// mbuslib_regread(): 0xC0300800 0x00000000

				/*
                if (reg == 0x3008)
                {
                    // TODO...
                    fifo_push(GFXFIFO_OUT, gfx_unk_reg[0]);

                }
                else if (reg == 0x300c)
                {
                    // TODO...
                    fifo_push(GFXFIFO_OUT, gfx_unk_reg[1]);
                }
                else
                {
                    fatalerror("gfxfifo_exec: regread: %08X %08X\n", w1, w2);
                }
                */

				// returns ram location x?

				int reg = (w1 >> 8) & 0xfffff;
				UINT32 ret = 0;

				ret |= gfx_gram[reg + 0] << 24;
				ret |= gfx_gram[reg + 1] << 16;
				ret |= gfx_gram[reg + 2] <<  8;
				ret |= gfx_gram[reg + 3] <<  0;

				fifo_push(NULL, GFXFIFO_OUT, ret);

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}
			case 0xd0:
			{
				// register readback of some sort

				// 0xD0301000 0x000001FC

				int reg = (w1 >> 8) & 0xfffff;
				int num = w2;
				int i;

				if (fifo_space_left(GFXFIFO_OUT) < num)
				{
					return;
				}

				/*
                if (reg == 0x3010)
                {
                    for (i = 0; i < num; i++)
                    {
                        fifo_push(GFXFIFO_OUT, gfx_unk_reg[2+i]);
                    }
                }
                else
                {
                    fatalerror("gfxfifo_exec: 0xD0: %08X %08X\n", w1, w2);
                }
                */

				// reads back n ram locations starting from x?
				for (i=0; i < num; i++)
				{
					UINT32 value = 0;

					value |= gfx_gram[reg + (i*4) + 0] << 24;
					value |= gfx_gram[reg + (i*4) + 1] << 16;
					value |= gfx_gram[reg + (i*4) + 2] <<  8;
					value |= gfx_gram[reg + (i*4) + 3] <<  0;

					fifo_push(NULL, GFXFIFO_OUT, value);
				}

				gfx_re_status = RE_STATUS_IDLE;
				break;
			}
			case 0xed:
			{
				// mbuslib_tex_ints()?

				//int reg = (w1 >> 8) & 0xff;
				int num = w2;

				int c = 0;
				int i;

				int num_left = num - gfx_re_word_count;
				int start = gfx_re_word_count;

				if (fifo_current_num(GFXFIFO_IN) < num_left)
				{
					num_left = fifo_current_num(GFXFIFO_IN);
				}


				if (num >= 0x100000)
				{
					printf("gfxfifo_exec: tex_ints %d words left\n", num-gfx_re_word_count);
					for (i=0; i < num_left; i++)
					{
						UINT64 param;
						fifo_pop(NULL, GFXFIFO_IN, &param);
						gfx_re_word_count++;
					}
				}
				else
				{
					printf("gfxfifo_exec: tex_ints %08X %08X\n", w1, w2);

					for (i=0; i < num_left; i++)
					{
						UINT64 param;
						fifo_pop(NULL, GFXFIFO_IN, &param);
						gfx_re_word_count++;

						gfx_texture[start+i] = (UINT32)(param);

						if (c == 0)
							printf("              ");
						printf("%08X ", (UINT32)(param));

						c++;

						if (c == 4)
						{
							printf("\n");
							c = 0;
						}
					}
					printf("\n");
				}

				if (gfx_re_word_count >= num)
				{
					gfx_re_status = RE_STATUS_IDLE;
				}
				break;
			}
			default:
			{
				int k = 0;
				int c = 0;
				printf("gfxfifo_exec: unknown command %08X %08X\n", w1, w2);

				if (fifo_current_num(GFXFIFO_IN) < 0)
				{
					return;
				}

				while (fifo_current_num(GFXFIFO_IN) > 0)
				{
					UINT64 param;
					fifo_pop(NULL, GFXFIFO_IN, &param);

					if (c == 0)
						printf("              ");
					printf("%08X ", (UINT32)(param));

					c++;

					if (c == 4)
					{
						printf("\n");
						c = 0;
					}
					k++;
				};
				logerror("\n");
			}
		}

//      printf("gfxfifo_exec: %08X %08X\n", w1, w2);
	};
}

READ64_MEMBER(cobra_state::gfx_fifo_r)
{
	UINT64 r = 0;

	gfx_fifo_exec(this);

	if (ACCESSING_BITS_32_63)
	{
		UINT64 data;
		fifo_pop(&space.device(), GFXFIFO_OUT, &data);

		data &= 0xffffffff;

		r |= (UINT64)(data) << 32;
	}
	if (ACCESSING_BITS_0_31)
	{
		UINT64 data;
		fifo_pop(&space.device(), GFXFIFO_OUT, &data);

		data &= 0xffffffff;

		r |= (UINT64)(data);
	}
//  printf("GFX FIFO read %08X%08X\n", (UINT32)(r >> 32), (UINT32)(r));

	return r;
}

WRITE64_MEMBER(cobra_state::gfx_fifo0_w)
{
	gfx_fifo_cache_addr = 2;
	COMBINE_DATA(gfx_fifo_mem + offset);
}

WRITE64_MEMBER(cobra_state::gfx_fifo1_w)
{
	gfx_fifo_cache_addr = 0;
	COMBINE_DATA(gfx_fifo_mem + offset);
}

WRITE64_MEMBER(cobra_state::gfx_fifo2_w)
{
	gfx_fifo_cache_addr = 1;
	COMBINE_DATA(gfx_fifo_mem + offset);
}

static int gfx_unknown_v1 = 0;
static int gfx_status_byte = 0;

READ64_MEMBER(cobra_state::gfx_unk1_r)
{
	UINT64 r = 0;

	if (ACCESSING_BITS_56_63)
	{
		UINT64 v = 0;
		// mbuslib_init fails if bits 3-7 (0x78) are not set

		v |= 0x78;

		// the low 2 bits are vblank flags
		// bit 3 (0x8) may be graphics engine idle flag

		v |= gfx_status_byte;
		gfx_status_byte ^= 1;

		r |= v << 56;
	}
	if (ACCESSING_BITS_40_47)
	{
		// mbuslib_init fails if this is not 0x7f

		r |= (UINT64) 0x7f << 40;
	}
	if (ACCESSING_BITS_24_31)
	{
		r |= (gfx_unknown_v1 & 3) << 24;
	}

	return r;
}

WRITE64_MEMBER(cobra_state::gfx_unk1_w)
{
//  printf("gfx_unk1_w: %08X %08X, %08X%08X\n", (UINT32)(data >> 32), (UINT32)(data), (UINT32)(mem_mask >> 32), (UINT32)(mem_mask));

	if (ACCESSING_BITS_56_63)
	{
		if ((data >> 63) & 1)
		{
			gfx_fifo_loopback = 0;
		}
	}

	if (ACCESSING_BITS_24_31)
	{
		UINT64 in1, in2;
		int value = (data >> 24) & 0xff;
		// used in check_fifo(). fifo loopback or something?

		if (value == 0xc0)
		{
			fifo_pop(&space.device(), GFXFIFO_IN, &in1);
			fifo_pop(&space.device(), GFXFIFO_IN, &in2);
			gfx_unknown_v1 = (UINT32)(in1 >> 32);

			fifo_push(&space.device(), GFXFIFO_OUT, in1 & 0xffffffff);
			fifo_push(&space.device(), GFXFIFO_OUT, in2 & 0xffffffff);
		}
		else if (value == 0x80)
		{
			// used in check_fifo() before the fifo test...
			gfx_fifo_loopback = 1;
		}
		else
		{
			printf("gfx_unk1_w: unknown value %02X\n", value);
		}
	}
}

WRITE64_MEMBER(cobra_state::gfx_buf_w)
{
//  printf("buf_w: top = %08X\n", gfxfifo_get_top());

	// buf_prc_read: 0x00A00001 0x10520200
	//               0x00A00001 0x10500018

	// teximage_load() / mbuslib_prc_read():    0x00A00001 0x10520800

//  printf("prc_read %08X%08X at %08X\n", (UINT32)(data >> 32), (UINT32)(data), activecpu_get_pc());

	gfx_fifo_exec(this);

	if (data == U64(0x00a0000110500018))
	{
		fifo_flush(GFXFIFO_OUT);

		// reads back the register selected by gfx register select

		fifo_push(&space.device(), GFXFIFO_OUT, (UINT32)((gfx_register[gfx_register_select] >> 32)));
		fifo_push(&space.device(), GFXFIFO_OUT, (UINT32)(gfx_register[gfx_register_select]));
	}
	else if (data == U64(0x00a0000110520800))
	{
		// in teximage_load()
		// some kind of busy flag for mbuslib_tex_ints()...

		// the code waits for bit 0x400 to be set

		fifo_push(&space.device(), GFXFIFO_OUT, 0x400);
	}
	else if (data != U64(0x00a0000110520200))
	{
		// prc_read always expects a value...

		fifo_push(&space.device(), GFXFIFO_OUT, 0);
	}
}
#if 0
static void gfx_cpu_dc_store(const device_t *device, UINT32 address)
{
	if (address == 0x10000000 || address == 0x18000000 || address == 0x1e000000)
	{
		UINT64 i = (UINT64)(gfx_fifo_cache_addr) << 32;

		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[0] >> 32) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[0] >>  0) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[1] >> 32) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[1] >>  0) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[2] >> 32) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[2] >>  0) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[3] >> 32) | i);
		fifo_push(device, GFXFIFO_IN, (UINT32)(gfx_fifo_mem[3] >>  0) | i);

		gfx_fifo_exec();
	}
	else
	{
		logerror("gfx: data cache store at %08X\n", address);
	}
}
#endif
WRITE64_MEMBER(cobra_state::gfx_debug_state_w)
{
	if (ACCESSING_BITS_40_47)
	{
		gfx_unk_flag = (UINT8)(data >> 40);
	}

	if (ACCESSING_BITS_56_63)
	{
		gfx_debug_state |= decode_debug_state_value((data >> 56) & 0xff) << 4;
		gfx_debug_state_wc++;
	}
	if (ACCESSING_BITS_48_55)
	{
		gfx_debug_state |= decode_debug_state_value((data >> 48) & 0xff);
		gfx_debug_state_wc++;
	}

	if (gfx_debug_state_wc >= 2)
	{
		if (gfx_debug_state != 0)
		{
			printf("GFX: debug state %02X\n", gfx_debug_state);
		}

		gfx_debug_state = 0;
		gfx_debug_state_wc = 0;
	}
}

static ADDRESS_MAP_START( cobra_gfx_map, AS_PROGRAM, 64, cobra_state )
	AM_RANGE(0x00000000, 0x003fffff) AM_RAM AM_SHARE("share1")
	AM_RANGE(0x07c00000, 0x07ffffff) AM_RAM AM_SHARE("share2")
	AM_RANGE(0x10000000, 0x1000001f) AM_WRITE(gfx_fifo0_w)
	AM_RANGE(0x18000000, 0x1800001f) AM_WRITE(gfx_fifo1_w)
	AM_RANGE(0x1e000000, 0x1e00001f) AM_WRITE(gfx_fifo2_w)
	AM_RANGE(0x20000000, 0x20000007) AM_WRITE(gfx_buf_w)
	AM_RANGE(0xfff00000, 0xfff7ffff) AM_ROM AM_REGION("user3", 0)		/* Boot ROM */
	AM_RANGE(0xfff80000, 0xfff80007) AM_WRITE(gfx_debug_state_w)
	AM_RANGE(0xffff0000, 0xffff0007) AM_READWRITE(gfx_unk1_r, gfx_unk1_w)
	AM_RANGE(0xffff0010, 0xffff001f) AM_READ(gfx_fifo_r)
ADDRESS_MAP_END

#endif

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

INPUT_PORTS_START( cobra )
	PORT_START("IN0")
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(1)

INPUT_PORTS_END

//static struct RF5C400interface rf5c400_interface =
//{
//  REGION_SOUND1
//};

/*
#if ENABLE_MAIN_CPU
static ppc_config main_ppc_cfg =
{
    PPC_MODEL_603EV,
    0x40,
    BUS_FREQUENCY_33MHZ
};
#endif

#if ENABLE_SUB_CPU
static ppc_config sub_ppc_cfg =
{
    PPC_MODEL_403GA
};
#endif

#if ENABLE_GFX_CPU
static ppc_config gfx_ppc_cfg =
{
    PPC_MODEL_604,
    0x40,
    BUS_FREQUENCY_33MHZ,
};
#endif
*/

static void ide_interrupt(int state)
{
	if (state)
	{
		sub_interrupt &= ~0x80;
	}
	else
	{
		sub_interrupt |= 0x80;
	}
}


static INTERRUPT_GEN( cobra_vblank )
{
	///cpunum_set_input_line(MAIN_CPU_ID, INPUT_LINE_IRQ0, ASSERT_LINE);
}


static MACHINE_RESET( cobra )
{
	cobra_state *cobra = machine.driver_data<cobra_state>();

	cobra->polybuffer_ptr = 0;
}

static MACHINE_CONFIG_START( cobra, cobra_state )

	/* basic machine hardware */
#if ENABLE_MAIN_CPU
	MCFG_CPU_ADD("maincpu", PPC603, 100000000)		/* 603EV, 100? MHz */
	//MCFG_CPU_CONFIG(main_ppc_cfg)
	MCFG_CPU_PROGRAM_MAP(cobra_main_map)
	MCFG_CPU_VBLANK_INT("screen", cobra_vblank)
#endif

#if ENABLE_SUB_CPU
	MCFG_CPU_ADD("subcpu", PPC403GA, 33000000)		/* 403GA, 33? MHz */
	//MCFG_CPU_CONFIG(sub_ppc_cfg)
	MCFG_CPU_PROGRAM_MAP(cobra_sub_map)
#endif

#if ENABLE_GFX_CPU
	MCFG_CPU_ADD("gfxcpu", PPC604, 100000000)		/* 604, 100? MHz */
	//MCFG_CPU_CONFIG(gfx_ppc_cfg)
	MCFG_CPU_PROGRAM_MAP(cobra_gfx_map)
#endif

	MCFG_QUANTUM_TIME(attotime::from_hz(6000))

	MCFG_MACHINE_RESET( cobra )

	MCFG_PCI_BUS_ADD("pcibus", 0)
	MCFG_PCI_BUS_DEVICE(0, NULL, mpc106_pci_r, mpc106_pci_w)

	MCFG_IDE_CONTROLLER_ADD("ide", ide_interrupt)

	/* video hardware */
	MCFG_VIDEO_START(cobra)

	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
	MCFG_SCREEN_SIZE(64*8, 48*8)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 48*8-1)
	MCFG_PALETTE_LENGTH(65536)
	MCFG_SCREEN_UPDATE(cobra)

	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")

//  MCFG_SOUND_ADD(RF5C400, 64000000/4)
//  MCFG_SOUND_CONFIG(rf5c400_interface)
//  MCFG_SOUND_ROUTE(0, "left", 1.0)
//  MCFG_SOUND_ROUTE(1, "right", 1.0)

MACHINE_CONFIG_END

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

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

static DRIVER_INIT(cobra)
{
//  cobra_state *cobra = machine.driver_data<cobra_state>();

	fifo_init(machine, GFXFIFO_IN, 8192, "GFXFIFO_IN", GFXFIFO_IN_VERBOSE);
	fifo_init(machine, GFXFIFO_OUT, 8192, "GFXFIFO_OUT", GFXFIFO_OUT_VERBOSE);
	fifo_init(machine, M2SFIFO, 2048, "M2SFIFO", M2SFIFO_VERBOSE);
	fifo_init(machine, S2MFIFO, 2048, "S2MFIFO", S2MFIFO_VERBOSE);

#if ENABLE_GFX_CPU
//  ppc_set_dcstore_handler(cobra->m_gfxcpu, gfx_cpu_dc_store);

	cobra_gfx_init(&machine);
#endif

	comram[0] = auto_alloc_array(machine, UINT32, 0x40000/4);
	comram[1] = auto_alloc_array(machine, UINT32, 0x40000/4);
}

static DRIVER_INIT(bujutsu)
{
	DRIVER_INIT_CALL(cobra);

	// rom hacks for main board...
	{
		int i;
		UINT32 sum = 0;
		UINT32 *rom = (UINT32*)machine.region("user1")->base();

		//rom[(0x02218^4) / 4] = 0x60000000;        // skip connect_grphcpu()...

		rom[(0x2b7c^4) / 4] = 0x60000000;		// this fails because the value in ram gets changed too soon...
		rom[(0x3de8^4) / 4] = 0x48000020;		// same here...

		// calculate the checksum of the patched rom...
		for (i=0; i < 0x20000/4; i++)
		{
			sum += (UINT8)((rom[i] >> 24) & 0xff);
			sum += (UINT8)((rom[i] >> 16) & 0xff);
			sum += (UINT8)((rom[i] >>  8) & 0xff);
			sum += (UINT8)((rom[i] >>  0) & 0xff);
		}

		rom[(0x0001fff0^4) / 4] = sum;
		rom[(0x0001fff4^4) / 4] = ~sum;
	}


	// rom hacks for sub board...
	{
		UINT32 *rom = (UINT32*)machine.region("user2")->base();

		rom[0x62094 / 4] = 0x60000000;			// skip hardcheck()...
	}


	// rom hacks for gfx board...
	{
		int i;
		UINT32 sum = 0;

		UINT32 *rom = (UINT32*)machine.region("user3")->base();

		rom[(0x022d4^4) / 4] = 0x60000000;		// skip init_raster() for now ...

		// calculate the checksum of the patched rom...
		for (i=0; i < 0x20000/4; i++)
		{
			sum += (UINT8)((rom[i] >> 24) & 0xff);
			sum += (UINT8)((rom[i] >> 16) & 0xff);
			sum += (UINT8)((rom[i] >>  8) & 0xff);
			sum += (UINT8)((rom[i] >>  0) & 0xff);
		}

		rom[(0x0001fff0^4) / 4] = sum;
		rom[(0x0001fff4^4) / 4] = ~sum;
	}
}

static DRIVER_INIT(racjamdx)
{
	DRIVER_INIT_CALL(cobra);
}

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

ROM_START(bujutsu)
	ROM_REGION64_BE(0x80000, "user1", 0)		/* Main CPU program (PPC603) */
	ROM_LOAD("645a01.33d", 0x00000, 0x80000, CRC(cb1a8683) SHA1(77b7dece84dc17e9d63242347b7202e879b9a10e) )

	ROM_REGION32_BE(0x80000, "user2", 0)		/* Sub CPU program (PPC403) */
	ROM_LOAD("645a02.24r", 0x00000, 0x80000, CRC(7d1c31bd) SHA1(94907c4068a488a74b2fa9a486c832d380c5b184) )

	ROM_REGION64_BE(0x80000, "user3", 0)		/* Gfx CPU program (PPC604) */
	ROM_LOAD("645a03.u17", 0x00000, 0x80000, CRC(086abd0b) SHA1(24df439eb9828ed3842f43f5f4014a3fc746e1e3) )

	DISK_REGION( "ide" )
	DISK_IMAGE_READONLY( "645c04", 0, SHA1(c0aabe69f6eb4e4cf748d606ae50674297af6a04) )
ROM_END

ROM_START(racjamdx)
	ROM_REGION64_BE(0x80000, "user1", 0)		/* Main CPU program (PPC603) */
	ROM_LOAD( "676a01.33d", 0x000000, 0x080000, CRC(1e6238f1) SHA1(d55949d98e9e290ceb8c018ed60ca090ec16c9dd) )

	ROM_REGION32_BE(0x80000, "user2", 0)		/* Sub CPU program (PPC403) */
	ROM_LOAD( "676a02.24r", 0x000000, 0x080000, CRC(371978ed) SHA1(c83f0cf04204212db00588df91b32122f37900f8) )

	ROM_REGION64_BE(0x80000, "user3", 0)		/* Gfx CPU program (PPC604) */
	ROM_LOAD( "676a03.u17", 0x000000, 0x080000, CRC(66f77cbd) SHA1(f1c7e50dbbfcc27ac011cbbb8ad2fd376c2e9056) )

	DISK_REGION( "ide" )
	DISK_IMAGE_READONLY( "676a04", 0, SHA1(8e89d3e5099e871b99fccba13adaa3cf8a6b71f0) )
ROM_END

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

GAME( 1997, bujutsu, 0, cobra, cobra, bujutsu, ROT0, "Konami", "Fighting Bujutsu", GAME_NOT_WORKING | GAME_NO_SOUND )
GAME( 1997, racjamdx, 0, cobra, cobra, racjamdx, ROT0, "Konami", "Racing Jam DX", GAME_NOT_WORKING | GAME_NO_SOUND )

