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

Sega "Space Tactics" Driver

Frank Palazzolo (palazzol@home.com)

Master processor - Intel 8080A

Memory Map:

0000-2fff ROM                       R
4000-47ff RAM                       R/W
5000-5fff switches/status           R
6000-6fff dips sw                   R
6000-600f Coin rjct/palette select  W
6010-601f sound triggers            W
6020-602f lamp latch                W
6030-603f speed latch               W
6040-605f shot related              W
6060-606f score display             W
60a0-60e0 sound triggers2           W
7000-7fff RNG/swit                  R     LS Nibble are a VBlank counter
								          used as a RNG
8000-8fff swit/stat                 R
8000-8fff offset RAM                W
9000-9fff V pos reg.                R     Reads counter from an encoder wheel
a000-afff H pos reg.                R     Reads counter from an encoder wheel
b000-bfff VRAM B                    R/W   alphanumerics, bases, barrier,
                                          enemy bombs
d000-dfff VRAM D                    R/W   furthest aliens (scrolling)
e000-efff VRAM E                    R/W   middle aliens (scrolling)
f000-ffff VRAM F                    R/W   closest aliens (scrolling)

--------------------------------------------------------------------

At this time, emulation is missing:

Lamps (Credit, Barrier, and 5 lamps for firing from the bases)
Sound (all discrete and a 76477)
Verify Color PROM resistor values (Last 8 colors)
Verify Bar graph displays

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

#include "driver.h"
#include "vidhrdw/generic.h"

/* Defined in machine/stactics.c */
READ_HANDLER( stactics_port_0_r );
READ_HANDLER( stactics_port_2_r );
READ_HANDLER( stactics_port_3_r );
READ_HANDLER( stactics_vert_pos_r );
READ_HANDLER( stactics_horiz_pos_r );
INTERRUPT_GEN( stactics_interrupt );
WRITE_HANDLER( stactics_coin_lockout_w );
extern unsigned char *stactics_motor_on;

/* Defined in vidhrdw/stactics.c */
VIDEO_START( stactics );
VIDEO_UPDATE( stactics );
extern unsigned char *stactics_scroll_ram;
extern unsigned char *stactics_videoram_b;
extern unsigned char *stactics_chardata_b;
extern unsigned char *stactics_videoram_d;
extern unsigned char *stactics_chardata_d;
extern unsigned char *stactics_videoram_e;
extern unsigned char *stactics_chardata_e;
extern unsigned char *stactics_videoram_f;
extern unsigned char *stactics_chardata_f;
extern unsigned char *stactics_display_buffer;

PALETTE_INIT( stactics );

WRITE_HANDLER( stactics_palette_w );
WRITE_HANDLER( stactics_scroll_ram_w );
WRITE_HANDLER( stactics_speed_latch_w );
WRITE_HANDLER( stactics_shot_trigger_w );
WRITE_HANDLER( stactics_shot_flag_clear_w );

WRITE_HANDLER( stactics_videoram_b_w );
WRITE_HANDLER( stactics_chardata_b_w );
WRITE_HANDLER( stactics_videoram_d_w );
WRITE_HANDLER( stactics_chardata_d_w );
WRITE_HANDLER( stactics_videoram_e_w );
WRITE_HANDLER( stactics_chardata_e_w );
WRITE_HANDLER( stactics_videoram_f_w );
WRITE_HANDLER( stactics_chardata_f_w );

static MEMORY_READ_START( readmem )
    { 0x0000, 0x2fff, MRA_ROM },
    { 0x4000, 0x47ff, MRA_RAM },
    { 0x5000, 0x5fff, input_port_0_r, },
    { 0x6000, 0x6fff, input_port_1_r, },
    { 0x7000, 0x7fff, stactics_port_2_r, },
    { 0x8000, 0x8fff, stactics_port_3_r },
    { 0x9000, 0x9fff, stactics_vert_pos_r },
    { 0xa000, 0xafff, stactics_horiz_pos_r },

    { 0xb000, 0xb3ff, MRA_RAM },
    { 0xb800, 0xbfff, MRA_RAM },

    { 0xd000, 0xd3ff, MRA_RAM },
    { 0xd600, 0xd7ff, MRA_RAM },   /* Used as scratch RAM, high scores, etc. */
    { 0xd800, 0xdfff, MRA_RAM },

    { 0xe000, 0xe3ff, MRA_RAM },
    { 0xe600, 0xe7ff, MRA_RAM },   /* Used as scratch RAM, high scores, etc. */
    { 0xe800, 0xefff, MRA_RAM },

    { 0xf000, 0xf3ff, MRA_RAM },
    { 0xf600, 0xf7ff, MRA_RAM },   /* Used as scratch RAM, high scores, etc. */
    { 0xf800, 0xffff, MRA_RAM },

MEMORY_END

static MEMORY_WRITE_START( writemem )
    { 0x4000, 0x47ff, MWA_RAM },
    { 0x6000, 0x6001, stactics_coin_lockout_w },
    { 0x6006, 0x6007, stactics_palette_w },
    /* { 0x6010, 0x601f, stactics_sound_w }, */
    { 0x6016, 0x6016, MWA_RAM, &stactics_motor_on },  /* Note: This overlaps rocket sound */
    /* { 0x6020, 0x602f, stactics_lamp_latch_w }, */
    { 0x6030, 0x603f, stactics_speed_latch_w },
    { 0x6040, 0x604f, stactics_shot_trigger_w },
    { 0x6050, 0x605f, stactics_shot_flag_clear_w },
    { 0x6060, 0x606f, MWA_RAM, &stactics_display_buffer },
    /* { 0x60a0, 0x60ef, stactics_sound2_w }, */

    { 0x8000, 0x8fff, stactics_scroll_ram_w, &stactics_scroll_ram },

    { 0xb000, 0xb3ff, stactics_videoram_b_w, &stactics_videoram_b, &videoram_size },
    { 0xb400, 0xb7ff, MWA_RAM },   /* Unused, but initialized */
    { 0xb800, 0xbfff, stactics_chardata_b_w, &stactics_chardata_b },

    { 0xc000, 0xcfff, MWA_NOP }, /* according to the schematics, nothing is mapped here */
                                 /* but, the game still tries to clear this out         */

    { 0xd000, 0xd3ff, stactics_videoram_d_w, &stactics_videoram_d },
    { 0xd400, 0xd7ff, MWA_RAM },   /* Used as scratch RAM, high scores, etc. */
    { 0xd800, 0xdfff, stactics_chardata_d_w, &stactics_chardata_d },

    { 0xe000, 0xe3ff, stactics_videoram_e_w, &stactics_videoram_e },
    { 0xe400, 0xe7ff, MWA_RAM },   /* Used as scratch RAM, high scores, etc. */
    { 0xe800, 0xefff, stactics_chardata_e_w, &stactics_chardata_e },

    { 0xf000, 0xf3ff, stactics_videoram_f_w, &stactics_videoram_f },
    { 0xf400, 0xf7ff, MWA_RAM },   /* Used as scratch RAM, high scores, etc. */
    { 0xf800, 0xffff, stactics_chardata_f_w, &stactics_chardata_f },

MEMORY_END

INPUT_PORTS_START( stactics )

    PORT_START  /* 	IN0 */
    /*PORT_BIT (0x80, IP_ACTIVE_HIGH, IPT_UNUSED ) Motor status. see stactics_port_0_r */
    PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 )
    PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
    PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON3 )
    PORT_BIT (0x08, IP_ACTIVE_LOW, IPT_BUTTON4 )
    PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON5 )
    PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON6 )
    PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON7 )

    PORT_START  /* IN1 */
    PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_B ) )
    PORT_DIPSETTING(    0x01, DEF_STR( 4C_1C ) )
    PORT_DIPSETTING(    0x05, DEF_STR( 2C_1C ) )
    PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
    PORT_DIPSETTING(    0x06, DEF_STR( 1C_2C ) )
    PORT_DIPSETTING(    0x04, DEF_STR( 1C_3C ) )
    PORT_DIPSETTING(    0x02, DEF_STR( 1C_4C ) )
    PORT_DIPSETTING(    0x00, DEF_STR( 1C_5C ) )
    PORT_DIPSETTING(    0x03, DEF_STR( 1C_6C ) )
    PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_A ) )
    PORT_DIPSETTING(    0x08, DEF_STR( 4C_1C ) )
    PORT_DIPSETTING(    0x28, DEF_STR( 2C_1C ) )
    PORT_DIPSETTING(    0x38, DEF_STR( 1C_1C ) )
    PORT_DIPSETTING(    0x30, DEF_STR( 1C_2C ) )
    PORT_DIPSETTING(    0x20, DEF_STR( 1C_3C ) )
    PORT_DIPSETTING(    0x10, DEF_STR( 1C_4C ) )
    PORT_DIPSETTING(    0x00, DEF_STR( 1C_5C ) )
    PORT_DIPSETTING(    0x18, DEF_STR( 1C_6C ) )
    PORT_DIPNAME( 0x40, 0x00, "High Score Initial Entry" )
    PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
    PORT_DIPSETTING(    0x00, DEF_STR( On ) )
    PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) )
    PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
    PORT_DIPSETTING(    0x00, DEF_STR( On ) )

    PORT_START  /* IN2 */
    /* This is accessed by stactics_port_2_r() */
    /*PORT_BIT (0x0f, IP_ACTIVE_HIGH, IPT_UNUSED ) Random number generator */
    PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN1 )
    PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN2 )
    PORT_DIPNAME( 0x40, 0x40, DEF_STR( Free_Play ) )
    PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
    PORT_DIPSETTING( 0x00, DEF_STR( On ) )
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )

    PORT_START  /* IN3 */
    /* This is accessed by stactics_port_3_r() */
    PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 )
    /* PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_UNUSED ) */
    PORT_DIPNAME( 0x04, 0x04, "Number of Barriers" )
    PORT_DIPSETTING(    0x04, "4" )
    PORT_DIPSETTING(    0x00, "6" )
    PORT_DIPNAME( 0x08, 0x08, "Bonus Barriers" )
    PORT_DIPSETTING(    0x08, "1" )
    PORT_DIPSETTING(    0x00, "2" )
    PORT_DIPNAME( 0x10, 0x00, "Extended Play" )
    PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
    PORT_DIPSETTING(    0x00, DEF_STR( On ) )
    PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY )
    PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY )
    /* PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) */

	PORT_START	/* FAKE */
    PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY )
    PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY )
INPUT_PORTS_END

/* For the character graphics */

static struct GfxLayout gfxlayout =
{
    8,8,
    256,
    1,     /* 1 bit per pixel */
    { 0 },
    { 0, 1, 2, 3, 4, 5, 6, 7 },
    { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
    8*8
};

/* For the LED Fire Beam (made up) */

static struct GfxLayout firelayout =
{
    16,9,
    256,
    1,     /* 1 bit per pixel */
    { 0 },
    { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7 },
    { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8 },
    8*9
};

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
    { 0, 0, &gfxlayout,  0,      64*4 },    /* Dynamically decoded from RAM */
    { 0, 0, &gfxlayout,  1*2*16, 64*4 },    /* Dynamically decoded from RAM */
    { 0, 0, &gfxlayout,  2*2*16, 64*4 },    /* Dynamically decoded from RAM */
    { 0, 0, &gfxlayout,  3*2*16, 64*4 },    /* Dynamically decoded from RAM */
    { 0, 0, &firelayout, 0, 64*4 },         /* LED Fire beam (synthesized gfx) */
    { 0, 0, &gfxlayout,  0, 64*4 },         /* LED and Misc. Display characters */
    { -1 }
};

static MACHINE_DRIVER_START( stactics )

	/* basic machine hardware */
	MDRV_CPU_ADD(8080, 1933560)
	MDRV_CPU_MEMORY(readmem,writemem)
	MDRV_CPU_VBLANK_INT(stactics_interrupt,1)

	MDRV_FRAMES_PER_SECOND(60)
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 0*8, 32*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(16)
	MDRV_COLORTABLE_LENGTH(16*4*4*2)

	MDRV_PALETTE_INIT(stactics)
	MDRV_VIDEO_START(stactics)
	MDRV_VIDEO_UPDATE(stactics)

	/* sound hardware */
MACHINE_DRIVER_END



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

  Game driver(s)

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

ROM_START( stactics )
	ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */
	ROM_LOAD( "epr-218x",     0x0000, 0x0800, CRC(b1186ad2) SHA1(88929a183ac0499619b3e07241f3b5a0c89bdab1) )
	ROM_LOAD( "epr-219x",     0x0800, 0x0800, CRC(3b86036d) SHA1(6ad5e14dcfdbc6d2a0a32ae7f18ce41ab4b51eec) )
	ROM_LOAD( "epr-220x",     0x1000, 0x0800, CRC(c58702da) SHA1(93936c46810722d435f9ddb0641defb741743dee) )
	ROM_LOAD( "epr-221x",     0x1800, 0x0800, CRC(e327639e) SHA1(024929b65c71eaeb6d234a14d7535a7d5b98b8d3) )
	ROM_LOAD( "epr-222y",     0x2000, 0x0800, CRC(24dd2bcc) SHA1(f77c59beccc1a77e3bfc2928ff532d6e221ff42d) )
	ROM_LOAD( "epr-223x",     0x2800, 0x0800, CRC(7fef0940) SHA1(5b2af55f75ef0130f9202b6a916a96dbd601fcfa) )

	ROM_REGION( 0x1060, REGION_GFX1, ROMREGION_DISPOSE )	/* gfx decoded in vh_start */
	ROM_LOAD( "epr-217",      0x0000, 0x0800, CRC(38259f5f) SHA1(1f4182ffc2d78fca22711526bb2ae2cfe040173c) )      /* LED fire beam data      */
	ROM_LOAD( "pr55",         0x0800, 0x0800, CRC(f162673b) SHA1(83743780b6c1f8014df24fa0650000b7cb137d92) )      /* timing PROM (unused)    */
	ROM_LOAD( "pr65",         0x1000, 0x0020, CRC(a1506b9d) SHA1(037c3db2ea40eca459e8acba9d1506dd28d72d10) )      /* timing PROM (unused)    */
	ROM_LOAD( "pr66",         0x1020, 0x0020, CRC(78dcf300) SHA1(37034cc0cfa4a8ec47937a2a34b77ec56b387a9b) )      /* timing PROM (unused)    */
	ROM_LOAD( "pr67",         0x1040, 0x0020, CRC(b27874e7) SHA1(c24bc78c4b2ae01aaed5d994ce2e7c5e0f2eece8) )      /* LED timing ROM (unused) */

	ROM_REGION( 0x0800, REGION_PROMS, 0 )
	ROM_LOAD( "pr54",         0x0000, 0x0800, CRC(9640bd6e) SHA1(dd12952a6591f2056ac1b5688dca0a3a2ef69f2d) )         /* color/priority prom */
ROM_END



GAMEX( 1981, stactics, 0, stactics, stactics, 0, ROT0, "Sega", "Space Tactics", GAME_NO_SOUND )

