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

                     -= 68020 + Imagetek I5000 Games =-

            driver by   David Haywood
            partly based on metro.c driver by Luca Elia


Main  CPU    :  MC68020

Video Chips   : Imagetek I5000 |
Sound Chips   : Imagetek I5000 |\- both sound and gfx
Other Features: Memory Blitter (part of Imagetek I5000)

---------------------------------------------------------------------------
Year + Game                     PCB         Video Chip  Issues / Notes
---------------------------------------------------------------------------
97  Rabbit                      VG5330-B    I5000
97? Tokimeki Mahjong Paradise(1)VG5550-B    I5000
---------------------------------------------------------------------------
Not dumped yet:
unknown

To Do:

- raster effects (rabbit only?, see left side of one of the levels in rabbit)
- clean up zoom code and make zoom effect more accurate

Notes:

(1) This is currently in its own driver "tmmjprd.c" because it uses the
    chip in a completely different way to Rabbit.  They should be merged
    again later, once the chip is better understood.



Rabbit PCB Layout
-----------------

VG5330-B
|---------------------------------|
|    62256  62256        61    60 |
|    62256  62256        51    50 |
|    62256  62256                 |
|    62256  62256        43    42 |
|                        41    40 |
|                                 |
|J     IMAGETEK          33    32 |
|A      I5000            23    22 |
|M            40MHz               |
|M                       13    12 |
|A             68EC020   03    02 |
|     ALTERA                      |
|     EPM7032 24MHz      31    30 |
|     93C46              21    20 |
|                                 |
| JPR2  JPR0  62256      11    10 |
| JPR3  JPR1  62256      01    00 |
|---------------------------------|

Notes:
      68020 clock: 24.000MHz
      VSync: 60Hz

      Only ROMs positions 60, 50, 40, 02, 03, 10, 11, 01, 00 are populated.

      There is known to exist an earlier Japanese prototype version of Rabbit which is currently not dumped.

Tokimeki Mahjong Paradise - Dear My Love Board Notes
----------------------------------------------------

Board:  VG5550-B

CPU:    MC68EC020FG25
OSC:    40.00000MHz
        24.00000MHz

Custom: Imagetek I5000 (2ch video & 2ch sound)

*/

#include "emu.h"
#include "cpu/m68000/m68000.h"
#include "machine/eepromser.h"
#include "sound/i5000.h"


class rabbit_state : public driver_device
{
public:
	enum
	{
		TIMER_BLIT_DONE
	};

	rabbit_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_eeprom(*this, "eeprom"),
		m_gfxdecode(*this, "gfxdecode"),
		m_palette(*this, "palette"),
		m_viewregs0(*this, "viewregs0"),
		m_viewregs6(*this, "viewregs6"),
		m_viewregs7(*this, "viewregs7"),
		m_viewregs9(*this, "viewregs9"),
		m_viewregs10(*this, "viewregs10"),
		m_tilemap_regs(*this, "tilemap_regs.%u", 0),
		m_spriteregs(*this, "spriteregs"),
		m_blitterregs(*this, "blitterregs"),
		m_spriteram(*this, "spriteram") { }

	required_device<cpu_device> m_maincpu;
	required_device<eeprom_serial_93cxx_device> m_eeprom;
	required_device<gfxdecode_device> m_gfxdecode;
	required_device<palette_device> m_palette;

	required_shared_ptr<UINT32> m_viewregs0;
	required_shared_ptr<UINT32> m_viewregs6;
	required_shared_ptr<UINT32> m_viewregs7;
	required_shared_ptr<UINT32> m_viewregs9;
	required_shared_ptr<UINT32> m_viewregs10;
	required_shared_ptr_array<UINT32, 4> m_tilemap_regs;
	required_shared_ptr<UINT32> m_spriteregs;
	required_shared_ptr<UINT32> m_blitterregs;
	required_shared_ptr<UINT32> m_spriteram;

	std::unique_ptr<bitmap_ind16> m_sprite_bitmap;
	rectangle m_sprite_clip;
	int m_vblirqlevel;
	int m_bltirqlevel;
	int m_banking;
	std::unique_ptr<UINT32[]> m_tilemap_ram[4];
	tilemap_t *m_tilemap[4];

	DECLARE_WRITE32_MEMBER(tilemap0_w);
	DECLARE_WRITE32_MEMBER(tilemap1_w);
	DECLARE_WRITE32_MEMBER(tilemap2_w);
	DECLARE_WRITE32_MEMBER(tilemap3_w);
	DECLARE_READ32_MEMBER(tilemap0_r);
	DECLARE_READ32_MEMBER(tilemap1_r);
	DECLARE_READ32_MEMBER(tilemap2_r);
	DECLARE_READ32_MEMBER(tilemap3_r);
	DECLARE_READ32_MEMBER(randomrabbits);
	DECLARE_WRITE32_MEMBER(rombank_w);
	DECLARE_WRITE32_MEMBER(blitter_w);
	DECLARE_WRITE32_MEMBER(eeprom_write);

	DECLARE_DRIVER_INIT(rabbit);

	TILE_GET_INFO_MEMBER(get_tilemap0_tile_info);
	TILE_GET_INFO_MEMBER(get_tilemap1_tile_info);
	TILE_GET_INFO_MEMBER(get_tilemap2_tile_info);
	TILE_GET_INFO_MEMBER(get_tilemap3_tile_info);

	INTERRUPT_GEN_MEMBER(vblank_interrupt);

	virtual void video_start() override;

	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	inline void get_tilemap_info(tile_data &tileinfo, int tile_index, int whichtilemap, int tilesize);
	void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect );
	void clearspritebitmap( bitmap_ind16 &bitmap, const rectangle &cliprect );
	void draw_sprite_bitmap( bitmap_ind16 &bitmap, const rectangle &cliprect );
	void drawtilemap( screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int whichtilemap );
	void do_blit();

protected:
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
};


/* call with tilesize = 0 for 8x8 or 1 for 16x16 */
void rabbit_state::get_tilemap_info(tile_data &tileinfo, int tile_index, int whichtilemap, int tilesize)
{
	/* fedcba98 76543210 fedcba98 76543210
	   x                                    color mask? how exactly does it relate to color bits?
	    xx                                  flip
	      x                                 depth
	       xxxx xxxx                        color
	                xxxx                    bank
	                     xxxxxxxx xxxxxxxx  tile
	*/
	int depth = (m_tilemap_ram[whichtilemap][tile_index]&0x10000000)>>28;
	int tileno = m_tilemap_ram[whichtilemap][tile_index]&0xffff;
	int bank = (m_tilemap_ram[whichtilemap][tile_index]&0x000f0000)>>16;
	int colour = (m_tilemap_ram[whichtilemap][tile_index]>>20)&0xff;
	int cmask = m_tilemap_ram[whichtilemap][tile_index]>>31&1;
	int flipxy = (m_tilemap_ram[whichtilemap][tile_index]>>29)&3;

	if (m_banking)
	{
		switch (bank)
		{
			case 0x0:
				break;

			case 0x8:
				tileno += 0x10000;
				break;

			case 0xc:
				tileno += 0x20000;
				break;

			default:
				//printf("tilebank %x\n",bank);
				break;
		}
	}
	else
	{
		tileno += (bank << 16);
	}

	if (depth)
	{
		tileno >>=(1+tilesize*2);
		colour &= 0x0f;
		colour += 0x20;
		tileinfo.group = 1;
		SET_TILE_INFO_MEMBER(6+tilesize,tileno,colour,TILE_FLIPXY(flipxy));
	}
	else
	{
		tileno >>=(0+tilesize*2);
		if (cmask) colour&=0x3f; // see health bars
		colour += 0x200;
		tileinfo.group = 0;
		SET_TILE_INFO_MEMBER(4+tilesize,tileno,colour,TILE_FLIPXY(flipxy));
	}
}

TILE_GET_INFO_MEMBER(rabbit_state::get_tilemap0_tile_info)
{
	get_tilemap_info(tileinfo,tile_index,0,1);
}

TILE_GET_INFO_MEMBER(rabbit_state::get_tilemap1_tile_info)
{
	get_tilemap_info(tileinfo,tile_index,1,1);
}

TILE_GET_INFO_MEMBER(rabbit_state::get_tilemap2_tile_info)
{
	get_tilemap_info(tileinfo,tile_index,2,1);
}

TILE_GET_INFO_MEMBER(rabbit_state::get_tilemap3_tile_info)
{
	get_tilemap_info(tileinfo,tile_index,3,0);
}

WRITE32_MEMBER(rabbit_state::tilemap0_w)
{
	COMBINE_DATA(&m_tilemap_ram[0][offset]);
	m_tilemap[0]->mark_tile_dirty(offset);
}

WRITE32_MEMBER(rabbit_state::tilemap1_w)
{
	COMBINE_DATA(&m_tilemap_ram[1][offset]);
	m_tilemap[1]->mark_tile_dirty(offset);
}

WRITE32_MEMBER(rabbit_state::tilemap2_w)
{
	COMBINE_DATA(&m_tilemap_ram[2][offset]);
	m_tilemap[2]->mark_tile_dirty(offset);
}


WRITE32_MEMBER(rabbit_state::tilemap3_w)
{
	COMBINE_DATA(&m_tilemap_ram[3][offset]);
	m_tilemap[3]->mark_tile_dirty(offset);
}

/*

'spriteregs' format (7 dwords)

00000XXX 0YYYAAAA 0000BBBB 0000CCCC 03065000 00720008 00a803bc
             zoom     zoom     zoom          Strt/End

XXX = global Xpos
YYY = global Ypos

AAAA = 0100 when normal, 018c when zoomed out
BBBB = 9f80 when normal, f6ba when zoomed out  0x9f80 / 128 = 319
CCCC = 6f80 when normal, ac7a when zoomed out  0x6f80 / 128 = 223


sprites invisible at the end of a round in rabbit, why?

*/

void rabbit_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect )
{
	int xpos,ypos,tileno,xflip,yflip, colr;
	gfx_element *gfx = m_gfxdecode->gfx(1);
	int todraw = (m_spriteregs[5]&0x0fff0000)>>16; // how many sprites to draw (start/end reg..) what is the other half?

	UINT32 *source = (m_spriteram+ (todraw*2))-2;
	UINT32 *finish = m_spriteram;

//  m_sprite_bitmap->fill(0x0, m_sprite_clip); // sloooow

	while( source>=finish )
	{
		xpos = (source[0]&0x00000fff);
		ypos = (source[0]&0x0fff0000)>>16;

		xflip = (source[0]&0x00008000)>>15;
		yflip = (source[0]&0x00004000)>>14;

		tileno = (source[1]&0x0001ffff);
		colr =   (source[1]&0x0ff00000)>>20;

		if(xpos&0x800)xpos-=0x1000;

		gfx->transpen(*m_sprite_bitmap,m_sprite_clip,tileno,colr,!xflip/*wrongdecode?*/,yflip,xpos+0x20-8/*-(m_spriteregs[0]&0x00000fff)*/,ypos-24/*-((m_spriteregs[1]&0x0fff0000)>>16)*/,15);
//      gfx->transpen(bitmap,cliprect,tileno,colr,!xflip/*wrongdecode?*/,yflip,xpos+0xa0-8/*-(m_spriteregs[0]&0x00000fff)*/,ypos-24+0x80/*-((m_spriteregs[1]&0x0fff0000)>>16)*/,0);


		source-=2;

	}

}

/* the sprite bitmap can probably be handled better than this ... */
void rabbit_state::clearspritebitmap( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
	int startx, starty;
	int y;
	int amountx,amounty;
	UINT16 *dstline;

	/* clears a *sensible* amount of the sprite bitmap */
	startx = (m_spriteregs[0]&0x00000fff);
	starty = (m_spriteregs[1]&0x0fff0000)>>16;

	startx-=200;
	starty-=200;
	amountx =650;
	amounty =600;

	if (startx < 0) { amountx += startx; startx = 0; }
	if ((startx+amountx)>=0x1000) amountx-=(0x1000-(startx+amountx));

	for (y=0; y<amounty;y++)
	{
		dstline = &m_sprite_bitmap->pix16((starty+y)&0xfff);
		memset(dstline+startx,0x00,amountx*2);
	}
}

/* todo: fix zoom, its inaccurate and this code is ugly */
void rabbit_state::draw_sprite_bitmap( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
	UINT32 x,y;
	UINT16 *srcline;
	UINT16 *dstline;
	UINT16 pixdata;
	UINT32 xsize, ysize;
	UINT32 xdrawpos, ydrawpos;
	UINT32 xstep,ystep;

	int startx, starty;
	startx = ((m_spriteregs[0]&0x00000fff));
	starty = ((m_spriteregs[1]&0x0fff0000)>>16);

	/* zoom compensation? */
	startx-=((m_spriteregs[1]&0x000001ff)>>1);
	starty-=((m_spriteregs[1]&0x000001ff)>>1);


	xsize = ((m_spriteregs[2]&0x0000ffff));
	ysize = ((m_spriteregs[3]&0x0000ffff));
	xsize+=0x80;
	ysize+=0x80;
	xstep = ((320*128)<<16) / xsize;
	ystep = ((224*128)<<16) / ysize;
	ydrawpos = 0;
	for (y=0;y<ysize;y+=0x80)
	{
		ydrawpos = ((y>>7)*ystep);
		ydrawpos >>=16;

		if ((ydrawpos >= cliprect.min_y) && (ydrawpos <= cliprect.max_y))
		{
			srcline = &m_sprite_bitmap->pix16((starty+(y>>7))&0xfff);
			dstline = &bitmap.pix16(ydrawpos);

			for (x=0;x<xsize;x+=0x80)
			{
				xdrawpos = ((x>>7)*xstep);
				xdrawpos >>=16;
				pixdata = srcline[(startx+(x>>7))&0xfff];

				if (pixdata)
					if ((xdrawpos >= cliprect.min_x) && (xdrawpos <= cliprect.max_x))
						dstline[xdrawpos] = pixdata;
			}
		}
	}



}
void rabbit_state::video_start()
{
	/* the tilemaps are bigger than the regions the cpu can see, need to allocate the ram here */
	/* or maybe not for this game/hw .... */
	m_tilemap_ram[0] = make_unique_clear<UINT32[]>(0x20000/4);
	m_tilemap_ram[1] = make_unique_clear<UINT32[]>(0x20000/4);
	m_tilemap_ram[2] = make_unique_clear<UINT32[]>(0x20000/4);
	m_tilemap_ram[3] = make_unique_clear<UINT32[]>(0x20000/4);

	m_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(rabbit_state::get_tilemap0_tile_info),this),TILEMAP_SCAN_ROWS,16, 16, 128,32);
	m_tilemap[1] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(rabbit_state::get_tilemap1_tile_info),this),TILEMAP_SCAN_ROWS,16, 16, 128,32);
	m_tilemap[2] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(rabbit_state::get_tilemap2_tile_info),this),TILEMAP_SCAN_ROWS,16, 16, 128,32);
	m_tilemap[3] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(rabbit_state::get_tilemap3_tile_info),this),TILEMAP_SCAN_ROWS, 8,  8, 128,32);

	/* the tilemaps mix 4bpp and 8bbp tiles, we split these into 2 groups, and set a different transpen for each group */
	m_tilemap[0]->map_pen_to_layer(0, 15,  TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[0]->map_pen_to_layer(1, 255, TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[1]->map_pen_to_layer(0, 15,  TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[1]->map_pen_to_layer(1, 255, TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[2]->map_pen_to_layer(0, 15,  TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[2]->map_pen_to_layer(1, 255, TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[3]->map_pen_to_layer(0, 15,  TILEMAP_PIXEL_TRANSPARENT);
	m_tilemap[3]->map_pen_to_layer(1, 255, TILEMAP_PIXEL_TRANSPARENT);

	m_sprite_bitmap = std::make_unique<bitmap_ind16>(0x1000,0x1000);
	m_sprite_clip.set(0, 0x1000-1, 0, 0x1000-1);

	save_pointer(NAME(m_tilemap_ram[0].get()), 0x20000/4);
	save_pointer(NAME(m_tilemap_ram[1].get()), 0x20000/4);
	save_pointer(NAME(m_tilemap_ram[2].get()), 0x20000/4);
	save_pointer(NAME(m_tilemap_ram[3].get()), 0x20000/4);
}

/*

info based on rabbit

tilemap regs format (6 dwords, 1 set for each tilemap)

each line represents the differences on each tilemap for unknown variables
(tilemap)
(0) 0P660000 YYYYXXXX 0000**00 0000AAAA BBBB0000 00fx0000   ** = 00 during title, 8f during game, x = 0 during title, 1 during game
(1)     1                 00                        0
(2)     2                 00                        0
(3)   263                 00                        0
 0123456789abcdef = never change?

 P = priority
 Y = Yscroll
 X = Xscroll
 A = Yzoom (maybe X) (0800 = normal, 0C60 = fully zoomed out)
 B = Xzoom (maybe Y) (0800 = normal, 0C60 = fully zoomed out)

*/

void rabbit_state::drawtilemap( screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int whichtilemap )
{
	INT32 startx, starty, incxx, incxy, incyx, incyy, tran;

	startx=((m_tilemap_regs[whichtilemap][1]&0x0000ffff));  // >>4 for nonzoomed pixel scroll value
	starty=((m_tilemap_regs[whichtilemap][1]&0xffff0000)>>16); // >> 20 for nonzoomed pixel scroll value
	incxx= ((m_tilemap_regs[whichtilemap][3]&0x00000fff)); // 0x800 when non-zoomed
	incyy= ((m_tilemap_regs[whichtilemap][4]&0x0fff0000)>>16);

	incxy = 0; incyx = 0;
	tran = 1;


	/* incxx and incyy and standard zoom, 16.16, a value of 0x10000 means no zoom
	   startx/starty are also 16.16 scrolling
	  */

	m_tilemap[whichtilemap]->draw_roz(screen, bitmap, cliprect, startx << 12,starty << 12,
			incxx << 5,incxy << 8,incyx << 8,incyy << 5,
			1,  /* wraparound */
			tran ? 0 : TILEMAP_DRAW_OPAQUE,0);
}

UINT32 rabbit_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	int prilevel;

	bitmap.fill(m_palette->black_pen(), cliprect);

//  popmessage("%08x %08x", m_viewregs0[0], m_viewregs0[1]);
//  popmessage("%08x %08x %08x %08x %08x %08x", m_tilemap_regs[0][0],m_tilemap_regs[0][1],m_tilemap_regs[0][2],m_tilemap_regs[0][3],m_tilemap_regs[0][4],m_tilemap_regs[0][5]);
//  popmessage("%08x %08x %08x %08x %08x %08x", m_tilemap_regs[1][0],m_tilemap_regs[1][1],m_tilemap_regs[1][2],m_tilemap_regs[1][3],m_tilemap_regs[1][4],m_tilemap_regs[1][5]);
//  popmessage("%08x %08x %08x %08x %08x %08x", m_tilemap_regs[2][0],m_tilemap_regs[2][1],m_tilemap_regs[2][2],m_tilemap_regs[2][3],m_tilemap_regs[2][4],m_tilemap_regs[2][5]);
//  popmessage("%08x %08x %08x %08x %08x %08x", m_tilemap_regs[3][0],m_tilemap_regs[3][1],m_tilemap_regs[3][2],m_tilemap_regs[3][3],m_tilemap_regs[3][4],m_tilemap_regs[3][5]);
//  popmessage("%08x %08x %08x %08x %08x %08x %08x", m_spriteregs[0],m_spriteregs[1],m_spriteregs[2],m_spriteregs[3],m_spriteregs[4],m_spriteregs[5], m_spriteregs[6]);
//  popmessage("%08x %08x %08x %08x %08x", m_viewregs6[0],m_viewregs6[1],m_viewregs6[2],m_viewregs6[3],m_viewregs6[4]);
//  popmessage("%08x", m_viewregs7[0]);
//  popmessage("%08x %08x %08x %08x", m_blitterregs[0],m_blitterregs[1],m_blitterregs[2],m_blitterregs[3]);
//  popmessage("%08x %08x %08x %08x", m_viewregs9[0],m_viewregs9[1],m_viewregs9[2],m_viewregs9[3]);

//  popmessage("%08x %08x %08x %08x %08x", m_viewregs10[0],m_viewregs10[1],m_viewregs10[2],m_viewregs10[3],m_viewregs10[4]);

	/* prio isnt certain but seems to work.. */
	for (prilevel = 0xf; prilevel >0; prilevel--)
	{
		if (prilevel == ((m_tilemap_regs[3][0]&0x0f000000)>>24)) drawtilemap(screen,bitmap,cliprect, 3);
		if (prilevel == ((m_tilemap_regs[2][0]&0x0f000000)>>24)) drawtilemap(screen,bitmap,cliprect, 2);
		if (prilevel == ((m_tilemap_regs[1][0]&0x0f000000)>>24)) drawtilemap(screen,bitmap,cliprect, 1);
		if (prilevel == ((m_tilemap_regs[0][0]&0x0f000000)>>24)) drawtilemap(screen,bitmap,cliprect, 0);

		if (prilevel == 0x09) // should it be selectable?
		{
			clearspritebitmap(bitmap,cliprect);
			draw_sprites(bitmap,cliprect);  // render to bitmap
			draw_sprite_bitmap(bitmap,cliprect); // copy bitmap to screen
		}
	}
	return 0;
}




READ32_MEMBER(rabbit_state::tilemap0_r)
{
	return m_tilemap_ram[0][offset];
}

READ32_MEMBER(rabbit_state::tilemap1_r)
{
	return m_tilemap_ram[1][offset];
}

READ32_MEMBER(rabbit_state::tilemap2_r)
{
	return m_tilemap_ram[2][offset];
}

READ32_MEMBER(rabbit_state::tilemap3_r)
{
	return m_tilemap_ram[3][offset];
}

READ32_MEMBER(rabbit_state::randomrabbits)
{
	return machine().rand();
}

/* rom bank is used when testing roms, not currently hooked up */
WRITE32_MEMBER(rabbit_state::rombank_w)
{
	UINT8 *dataroms = memregion("gfx1")->base();
#if 0
	int bank;
	printf("rabbit rombank %08x\n",data);
	bank = data & 0x3ff;

	membank("bank1")->set_base(&dataroms[0x40000*(bank&0x3ff)]);
#else
	membank("bank1")->set_base(&dataroms[0]);
#endif

}


#define BLITCMDLOG 0
#define BLITLOG 0

void rabbit_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
	switch (id)
	{
	case TIMER_BLIT_DONE:
		m_maincpu->set_input_line(m_bltirqlevel, HOLD_LINE);
		break;
	default:
		assert_always(FALSE, "Unknown id in rabbit_state::device_timer");
	}
}

void rabbit_state::do_blit()
{
	UINT8 *blt_data = memregion("gfx1")->base();
	int blt_source = (m_blitterregs[0]&0x000fffff)>>0;
	int blt_column = (m_blitterregs[1]&0x00ff0000)>>16;
	int blt_line   = (m_blitterregs[1]&0x000000ff);
	int blt_tilemp = (m_blitterregs[2]&0x0000e000)>>13;
	int blt_oddflg = (m_blitterregs[2]&0x00000001)>>0;
	int mask,shift;


	if(BLITCMDLOG) osd_printf_debug("BLIT command %08x %08x %08x\n", m_blitterregs[0], m_blitterregs[1], m_blitterregs[2]);

	if (blt_oddflg&1)
	{
		mask = 0xffff0000;
		shift= 0;
	}
	else
	{
		mask = 0x0000ffff;
		shift= 16;
	}

	blt_oddflg>>=1; /* blt_oddflg is now in dword offsets*/
	blt_oddflg+=0x80*blt_line;

	blt_source<<=1; /* blitsource is in word offsets */

	while(1)
	{
		int blt_commnd = blt_data[blt_source+1];
		int blt_amount = blt_data[blt_source+0];
		int blt_value;
		int loopcount;
		int writeoffs;
		blt_source+=2;

		switch (blt_commnd)
		{
			case 0x00: /* copy nn bytes */
				if (!blt_amount)
				{
					if(BLITLOG) osd_printf_debug("end of blit list\n");
					timer_set(attotime::from_usec(500), TIMER_BLIT_DONE);
					return;
				}

				if(BLITLOG) osd_printf_debug("blit copy %02x bytes\n", blt_amount);
				for (loopcount=0;loopcount<blt_amount;loopcount++)
				{
					blt_value = ((blt_data[blt_source+1]<<8)|(blt_data[blt_source+0]));
					blt_source+=2;
					writeoffs=blt_oddflg+blt_column;
					m_tilemap_ram[blt_tilemp][writeoffs]=(m_tilemap_ram[blt_tilemp][writeoffs]&mask)|(blt_value<<shift);
					m_tilemap[blt_tilemp]->mark_tile_dirty(writeoffs);

					blt_column++;
					blt_column&=0x7f;
				}

				break;

			case 0x02: /* fill nn bytes */
				if(BLITLOG) osd_printf_debug("blit fill %02x bytes\n", blt_amount);
				blt_value = ((blt_data[blt_source+1]<<8)|(blt_data[blt_source+0]));
				blt_source+=2;

				for (loopcount=0;loopcount<blt_amount;loopcount++)
				{
					writeoffs=blt_oddflg+blt_column;
					m_tilemap_ram[blt_tilemp][writeoffs]=(m_tilemap_ram[blt_tilemp][writeoffs]&mask)|(blt_value<<shift);
					m_tilemap[blt_tilemp]->mark_tile_dirty(writeoffs);
					blt_column++;
					blt_column&=0x7f;
				}

				break;

			case 0x03: /* next line */
				if(BLITLOG) osd_printf_debug("blit: move to next line\n");
				blt_column = (m_blitterregs[1]&0x00ff0000)>>16; /* --CC---- */
				blt_oddflg+=128;
				break;

			default: /* unknown / illegal */
				if(BLITLOG) osd_printf_debug("unknown blit command %02x\n",blt_commnd);
				break;
		}
	}

}



WRITE32_MEMBER(rabbit_state::blitter_w)
{
	COMBINE_DATA(&m_blitterregs[offset]);

	if (offset == 0x0c/4)
	{
		do_blit();
	}
}

WRITE32_MEMBER(rabbit_state::eeprom_write)
{
	// don't disturb the EEPROM if we're not actually writing to it
	// (in particular, data & 0x100 here with mask = ffff00ff looks to be the watchdog)
	if (mem_mask == 0xff000000)
	{
		// latch the bit
		m_eeprom->di_write((data & 0x01000000) >> 24);

		// reset line asserted: reset.
		m_eeprom->cs_write((data & 0x04000000) ? ASSERT_LINE : CLEAR_LINE );

		// clock line asserted: write latch or select next bit to read
		m_eeprom->clk_write((data & 0x02000000) ? ASSERT_LINE : CLEAR_LINE );
	}
}

static ADDRESS_MAP_START( rabbit_map, AS_PROGRAM, 32, rabbit_state )
	AM_RANGE(0x000000, 0x1fffff) AM_ROM
	AM_RANGE(0x000000, 0x000003) AM_WRITENOP // bug in code / emulation?
	AM_RANGE(0x000010, 0x000013) AM_WRITENOP // bug in code / emulation?
	AM_RANGE(0x000024, 0x000027) AM_WRITENOP // bug in code / emulation?
	AM_RANGE(0x00719c, 0x00719f) AM_WRITENOP // bug in code / emulation?
	AM_RANGE(0x200000, 0x200003) AM_READ_PORT("INPUTS") AM_WRITE(eeprom_write)
	AM_RANGE(0x400010, 0x400013) AM_READ(randomrabbits) // gfx chip status?
	/* this lot are probably gfxchip/blitter etc. related */
	AM_RANGE(0x400010, 0x400013) AM_WRITEONLY AM_SHARE("viewregs0" )
	AM_RANGE(0x400100, 0x400117) AM_WRITEONLY AM_SHARE("tilemap_regs.0" ) // tilemap regs1
	AM_RANGE(0x400120, 0x400137) AM_WRITEONLY AM_SHARE("tilemap_regs.1" ) // tilemap regs2
	AM_RANGE(0x400140, 0x400157) AM_WRITEONLY AM_SHARE("tilemap_regs.2" ) // tilemap regs3
	AM_RANGE(0x400160, 0x400177) AM_WRITEONLY AM_SHARE("tilemap_regs.3" ) // tilemap regs4
	AM_RANGE(0x400200, 0x40021b) AM_WRITEONLY AM_SHARE("spriteregs" ) // sprregs?
	AM_RANGE(0x400300, 0x400303) AM_WRITE(rombank_w) // used during rom testing, rombank/area select + something else?
	AM_RANGE(0x400400, 0x400413) AM_WRITEONLY AM_SHARE("viewregs6" ) // some global controls? (brightness etc.?)
	AM_RANGE(0x400500, 0x400503) AM_WRITEONLY AM_SHARE("viewregs7" )
	AM_RANGE(0x400700, 0x40070f) AM_WRITE(blitter_w) AM_SHARE("blitterregs" )
	AM_RANGE(0x400800, 0x40080f) AM_WRITEONLY AM_SHARE("viewregs9" ) // never changes?
	AM_RANGE(0x400900, 0x4009ff) AM_DEVREADWRITE16("i5000snd", i5000snd_device, read, write, 0xffffffff)
	/* hmm */
	AM_RANGE(0x479700, 0x479713) AM_WRITEONLY AM_SHARE("viewregs10" )

	AM_RANGE(0x440000, 0x47ffff) AM_ROMBANK("bank1") // data (gfx / sound) rom readback for ROM testing
	/* tilemaps */
	AM_RANGE(0x480000, 0x483fff) AM_READWRITE(tilemap0_r,tilemap0_w)
	AM_RANGE(0x484000, 0x487fff) AM_READWRITE(tilemap1_r,tilemap1_w)
	AM_RANGE(0x488000, 0x48bfff) AM_READWRITE(tilemap2_r,tilemap2_w)
	AM_RANGE(0x48c000, 0x48ffff) AM_READWRITE(tilemap3_r,tilemap3_w)
	AM_RANGE(0x494000, 0x497fff) AM_RAM AM_SHARE("spriteram") // sprites?
	AM_RANGE(0x4a0000, 0x4affff) AM_RAM_DEVWRITE("palette", palette_device, write) AM_SHARE("palette")
	AM_RANGE(0xff0000, 0xffffff) AM_RAM
ADDRESS_MAP_END


static INPUT_PORTS_START( rabbit )
	PORT_START("INPUTS")
	PORT_BIT( 0x00000001, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_READ_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_93cxx_device, do_read) // as per code at 4d932
	PORT_BIT( 0x00000002, IP_ACTIVE_LOW, IPT_UNKNOWN ) // unlabeled in input test
	PORT_BIT( 0x00000004, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x00000008, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x00000010, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_SERVICE( 0x00000020, IP_ACTIVE_LOW )
	PORT_BIT( 0x00000040, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x00000080, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x00000100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x00000200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x00000400, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x00000800, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x00001000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x00002000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0x00004000, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(1)
	PORT_BIT( 0x00008000, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(1)

	PORT_BIT( 0x00010000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x00020000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x00040000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x00080000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x00100000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x00200000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x00400000, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2)
	PORT_BIT( 0x00800000, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2)
	PORT_BIT( 0xff000000, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END


static const gfx_layout sprite_8x8x4_layout =
{
	8,8,
	RGN_FRAC(1,1),
	4,
	{ 0,1,2,3 },
	{ 8,12,0,4, 24,28,16,20 },
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },
	8*32
};

static const gfx_layout sprite_8x8x8_layout =
{
	8,8,
	RGN_FRAC(1,1),
	8,
	{ 0,1,2,3,4,5,6,7 },
	{ 8,0, 40,32,24,16,56, 48 },
	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64 },
	8*64
};



static const gfx_layout sprite_16x16x4_layout =
{
	16,16,
	RGN_FRAC(1,2),
	4,
	{ 0,1,2,3 },
	{ RGN_FRAC(1,2)+8,RGN_FRAC(1,2)+12,RGN_FRAC(1,2)+0,RGN_FRAC(1,2)+4,RGN_FRAC(1,2)+24,RGN_FRAC(1,2)+28,RGN_FRAC(1,2)+16,RGN_FRAC(1,2)+20, 8,12,0,4, 24,28,16,20  },
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32,8*32,9*32,10*32,11*32,12*32,13*32,14*32,15*32 },
	16*32
};

static const gfx_layout sprite_16x16x8_layout =
{
	16,16,
	RGN_FRAC(1,2),
	8,
	{ 0,1,2,3,4,5,6,7 },
	{ RGN_FRAC(1,2)+8,RGN_FRAC(1,2)+0,RGN_FRAC(1,2)+24,RGN_FRAC(1,2)+16,RGN_FRAC(1,2)+40,RGN_FRAC(1,2)+32,RGN_FRAC(1,2)+56,RGN_FRAC(1,2)+48, 8,0,24,16, 40,32,56,48  },
	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64,8*64,9*64,10*64,11*64,12*64,13*64,14*64,15*64 },
	16*64
};

static const gfx_layout _8x8x4_layout =
{
	8,8,
	RGN_FRAC(1,1),
	4,
	{ 0,1,2,3 },
	{ 4,0,12,8,20,16,28,24 },
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },
	8*32
};

static const gfx_layout _16x16x4_layout =
{
	16,16,
	RGN_FRAC(1,1),
	4,
	{ 0,1,2,3 },
	{ 4,0,12,8, 20,16,28,24,36,32,44,40,52,48,60,56 },
	{ 0*64, 1*64, 2*64,3*64,4*64,5*64,6*64,7*64,8*64,9*64,10*64,11*64,12*64,13*64,14*64,15*64 },
	16*64
};

static const gfx_layout _8x8x8_layout =
{
	8,8,
	RGN_FRAC(1,1),
	8,
	{ 0,1,2,3,4,5,6,7 },
	{ 0,8,16,24,32,40,48,56 },
	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64 },
	8*64
};

static const gfx_layout _16x16x8_layout =
{
	16,16,
	RGN_FRAC(1,1),
	8,
	{ 0,1,2,3,4,5,6,7 },
	{ 0,8,16,24,32,40,48,56, 64, 72, 80, 88, 96, 104, 112, 120 },
	{ 0*128, 1*128, 2*128,3*128,4*128,5*128,6*128,7*128,8*128,9*128,10*128,11*128,12*128,13*128,14*128,15*128 },
	16*128
};



static GFXDECODE_START( rabbit )
	/* this seems to be sprites */
	GFXDECODE_ENTRY( "gfx1", 0, sprite_8x8x4_layout,   0x0, 0x1000  )
	GFXDECODE_ENTRY( "gfx1", 0, sprite_16x16x4_layout, 0x0, 0x1000  )
	GFXDECODE_ENTRY( "gfx1", 0, sprite_8x8x8_layout,   0x0, 0x1000  ) // wrong
	GFXDECODE_ENTRY( "gfx1", 0, sprite_16x16x8_layout, 0x0, 0x1000  ) // wrong

	/* this seems to be backgrounds and tilemap gfx */
	GFXDECODE_ENTRY( "gfx2", 0, _8x8x4_layout,   0x0, 0x1000  )
	GFXDECODE_ENTRY( "gfx2", 0, _16x16x4_layout, 0x0, 0x1000  )
	GFXDECODE_ENTRY( "gfx2", 0, _8x8x8_layout,   0x0, 0x1000  )
	GFXDECODE_ENTRY( "gfx2", 0, _16x16x8_layout, 0x0, 0x1000  )

GFXDECODE_END

/* irq 6 = vblank
   irq 4 = blitter done?
   irq 5 = ?
   irq 1 = ?

  */

INTERRUPT_GEN_MEMBER(rabbit_state::vblank_interrupt)
{
	m_maincpu->set_input_line(m_vblirqlevel, HOLD_LINE);
}

static MACHINE_CONFIG_START( rabbit, rabbit_state )
	MCFG_CPU_ADD("maincpu", M68EC020, XTAL_24MHz)
	MCFG_CPU_PROGRAM_MAP(rabbit_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", rabbit_state,  vblank_interrupt)

	MCFG_EEPROM_SERIAL_93C46_ADD("eeprom")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", rabbit)

	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MCFG_SCREEN_SIZE(64*16, 64*16)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 40*8-1, 0*8, 28*8-1)
//  MCFG_SCREEN_VISIBLE_AREA(0*8, 64*16-1, 0*16, 64*16-1)
//  MCFG_SCREEN_VISIBLE_AREA(0*8, 20*16-1, 32*16, 48*16-1)
	MCFG_SCREEN_UPDATE_DRIVER(rabbit_state, screen_update)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_PALETTE_ADD_INIT_BLACK("palette", 0x4000)
	MCFG_PALETTE_FORMAT(XGRB)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")

	MCFG_I5000_SND_ADD("i5000snd", XTAL_40MHz)
	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
MACHINE_CONFIG_END





DRIVER_INIT_MEMBER(rabbit_state,rabbit)
{
	m_banking = 1;
	m_vblirqlevel = 6;
	m_bltirqlevel = 4;
	/* 5 and 1 are also valid and might be raster related */
}



ROM_START( rabbit )
	ROM_REGION( 0x200000, "maincpu", 0 ) /* 68020 Code */
	ROM_LOAD32_BYTE( "jpr0.0", 0x000000, 0x080000, CRC(52bb18c0) SHA1(625bc8a4daa6d08cacd92d9110cf67a95a91325a) )
	ROM_LOAD32_BYTE( "jpr1.1", 0x000001, 0x080000, CRC(38299d0d) SHA1(72ccd51781b47636bb16ac18037cb3121d17199f) )
	ROM_LOAD32_BYTE( "jpr2.2", 0x000002, 0x080000, CRC(fa3fd91a) SHA1(ac0e658af30b37b752ede833b44ff5423b93bdb1) )
	ROM_LOAD32_BYTE( "jpr3.3", 0x000003, 0x080000, CRC(d22727ca) SHA1(8415cb2d3864b11fe5623ac65f2e28fd62c61bd1) )


// the rom test tests as if things were mapped like this (video chip / blitter space?)
#if 0
	ROM_REGION( 0x9000000, "test", ROMREGION_ERASE )
	ROM_LOAD32_WORD( "jfv0.00", 0x0000002, 0x400000, CRC(b2a4d3d3) SHA1(0ab71d82a37ff94442b91712a28d3470619ba575) ) // sprite gfx
	ROM_LOAD32_WORD( "jfv1.01", 0x0000000, 0x400000, CRC(83f3926e) SHA1(b1c479e675d35fc08c9a7648ff40348a24654e7e) ) // sprite gfx
	ROM_LOAD32_WORD( "jsn0.11", 0x0800002, 0x400000, CRC(e1f726e8) SHA1(598d75f3ff9e43ec8ce6131ed37f4345bf2f2d8e) ) // sound
	ROM_LOAD32_WORD( "jfv2.02", 0x2000002, 0x400000, CRC(b264bfb5) SHA1(8fafedb6af74150465b1773e80aef0edc3da4678) ) // sprite gfx
	ROM_LOAD32_WORD( "jfv3.03", 0x2000000, 0x400000, CRC(3e1a9be2) SHA1(2082a4ae8cda84cec5ea0fc08753db387bb70d41) ) // sprite gfx
	ROM_LOAD16_BYTE( "jbg0.40", 0x4000001, 0x200000, CRC(89662944) SHA1(ca916ba38480fa588af19fc9682603f5195ad6c7) ) // bg gfx (fails check?)
	ROM_LOAD16_BYTE( "jbg1.50", 0x6000000, 0x200000, CRC(1fc7f6e0) SHA1(b36062d2a9683683ffffd3003d5244a185f53280) ) // bg gfx
	ROM_LOAD16_BYTE( "jbg2.60", 0x8000001, 0x200000, CRC(aee265fc) SHA1(ec420ab30b9b5141162223fc1fbf663ad9f211e6) ) // bg gfx
#endif

	ROM_REGION( 0x1000000, "gfx1", 0 ) /* Sprite Roms (and Blitter Data) */
	ROM_LOAD32_WORD( "jfv0.00", 0x0000002, 0x400000, CRC(b2a4d3d3) SHA1(0ab71d82a37ff94442b91712a28d3470619ba575) )
	ROM_LOAD32_WORD( "jfv1.01", 0x0000000, 0x400000, CRC(83f3926e) SHA1(b1c479e675d35fc08c9a7648ff40348a24654e7e) )
	ROM_LOAD32_WORD( "jfv2.02", 0x0800002, 0x400000, CRC(b264bfb5) SHA1(8fafedb6af74150465b1773e80aef0edc3da4678) )
	ROM_LOAD32_WORD( "jfv3.03", 0x0800000, 0x400000, CRC(3e1a9be2) SHA1(2082a4ae8cda84cec5ea0fc08753db387bb70d41) )


	ROM_REGION( 0x600000, "gfx2", 0 ) /* BG Roms */
	ROM_LOAD( "jbg0.40", 0x000000, 0x200000, CRC(89662944) SHA1(ca916ba38480fa588af19fc9682603f5195ad6c7) )
	ROM_LOAD( "jbg1.50", 0x200000, 0x200000, CRC(1fc7f6e0) SHA1(b36062d2a9683683ffffd3003d5244a185f53280) )
	ROM_LOAD( "jbg2.60", 0x400000, 0x200000, CRC(aee265fc) SHA1(ec420ab30b9b5141162223fc1fbf663ad9f211e6) )

	ROM_REGION( 0x400000, "i5000snd", ROMREGION_ERASE ) /* sound rom */
	ROM_LOAD( "jsn0.11", 0x000000, 0x000018, CRC(e1f726e8) SHA1(598d75f3ff9e43ec8ce6131ed37f4345bf2f2d8e) ) // header "VCDT i5000"
	ROM_CONTINUE(        0x000000, 0x3fffe8 ) // sample data starts here

	ROM_REGION16_BE( 0x80, "eeprom", 0 )
	ROM_LOAD( "rabbit.nv", 0x0000, 0x0080, CRC(73d471ed) SHA1(45e045f5ea9036342b88013e021d402741d98537) )
ROM_END


GAME( 1997, rabbit,        0, rabbit,  rabbit, rabbit_state,  rabbit,  ROT0, "Aorn / Electronic Arts", "Rabbit (Asia 3/6)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) // somewhat playable
