text: /*
  
  News
  
  from the program ROM:
  PROGRAMED BY KWANG-HO CHO
  COPYRIGHT(C) 1993
  ALL RIGHTS RESERVED BY POBY
  Hi-tel ID:poby:
  
  
  driver by David Haywood
  
  */
  
  #include "driver.h"
  #include "news.h"
  #include "sound/okim6295.h"
  
  
  static ADDRESS_MAP_START( readmem, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
  	AM_RANGE(0x8000, 0x8fff) AM_READ(MRA8_RAM)
  	AM_RANGE(0xc000, 0xc000) AM_READ(input_port_0_r)
  	AM_RANGE(0xc001, 0xc001) AM_READ(input_port_1_r)
  	AM_RANGE(0xc002, 0xc002) AM_READ(OKIM6295_status_0_r)
  	AM_RANGE(0xe000, 0xffff) AM_READ(MRA8_RAM)
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( writemem, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM)	/* 4000-7fff is written to during startup, probably leftover code */
  	AM_RANGE(0x8000, 0x87ff) AM_WRITE(news_fgram_w) AM_BASE(&news_fgram)
  	AM_RANGE(0x8800, 0x8fff) AM_WRITE(news_bgram_w) AM_BASE(&news_bgram)
  	AM_RANGE(0x9000, 0x91ff) AM_WRITE(paletteram_xxxxRRRRGGGGBBBB_be_w) AM_BASE(&paletteram)
  	AM_RANGE(0xc002, 0xc002) AM_WRITE(OKIM6295_data_0_w) /* ?? */
  	AM_RANGE(0xc003, 0xc003) AM_WRITE(news_bgpic_w)
  	AM_RANGE(0xe000, 0xffff) AM_WRITE(MWA8_RAM)
  ADDRESS_MAP_END
  
  
  INPUT_PORTS_START( news )
  	PORT_START	/* DSW */
  	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SWA:1,2")
  	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(    0x01, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(    0x03, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(    0x02, DEF_STR( 1C_2C ) )
  	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SWA:3,4")
  	PORT_DIPSETTING(    0x0c, DEF_STR( Easy ) )
  	PORT_DIPSETTING(    0x08, DEF_STR( Medium ) )
  	PORT_DIPSETTING(    0x04, DEF_STR( Hard ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
  	PORT_DIPNAME( 0x10, 0x10, "Helps" ) PORT_DIPLOCATION("SWA:5")
  	PORT_DIPSETTING(    0x10, "1" )
  	PORT_DIPSETTING(    0x00, "2" )
  	PORT_DIPNAME( 0x20, 0x00, "Copyright" ) PORT_DIPLOCATION("SWA:6")
  	PORT_DIPSETTING(    0x00, "Poby" )
  	PORT_DIPSETTING(    0x20, "Virus" )
  	PORT_DIPUNUSED_DIPLOC( 0x40, IP_ACTIVE_LOW, "SWA:7" )
  	PORT_DIPUNUSED_DIPLOC( 0x80, IP_ACTIVE_LOW, "SWA:8" )
  
  	PORT_START
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 )
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 )
  INPUT_PORTS_END
  
  INPUT_PORTS_START( newsa )
  	PORT_START	/* DSW */
  	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SWA:1,2")
  	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(    0x01, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(    0x03, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(    0x02, DEF_STR( 1C_2C ) )
  	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SWA:3,4")
  	PORT_DIPSETTING(    0x0c, DEF_STR( Easy ) )
  	PORT_DIPSETTING(    0x08, DEF_STR( Medium ) )
  	PORT_DIPSETTING(    0x04, DEF_STR( Hard ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
  	PORT_DIPNAME( 0x10, 0x10, "Helps" ) PORT_DIPLOCATION("SWA:5")
  	PORT_DIPSETTING(    0x10, "1" )
  	PORT_DIPSETTING(    0x00, "2" )
  	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) ) PORT_DIPLOCATION("SWA:6")
  	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
  	PORT_DIPUNUSED_DIPLOC( 0x40, IP_ACTIVE_LOW, "SWA:7" )
  	PORT_DIPUNUSED_DIPLOC( 0x80, IP_ACTIVE_LOW, "SWA:8" )
  
  	PORT_START
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 )
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 )
  INPUT_PORTS_END
  
  static const gfx_layout tiles8x8_layout =
  {
  	8,8,
  	RGN_FRAC(1,1),
  	4,
  	{ 0, 1, 2, 3 },
  	{ 0, 4, 8, 12, 16, 20, 24, 28 },
  	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },
  	32*8
  };
  
  static const gfx_decode gfxdecodeinfo[] =
  {
  	{ REGION_GFX1, 0, &tiles8x8_layout, 0, 16 },
  	{ -1 }
  };
  
  
  
  static MACHINE_DRIVER_START( news )
  	/* basic machine hardware */
  	MDRV_CPU_ADD(Z80,8000000)		 /* ? MHz */
  	MDRV_CPU_PROGRAM_MAP(readmem,writemem)
  	MDRV_CPU_VBLANK_INT(irq0_line_hold,1)
  
  	MDRV_SCREEN_REFRESH_RATE(60)
  	MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
  
  	/* video hardware */
  	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER )
  	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
  	MDRV_SCREEN_SIZE(256, 256)
  	MDRV_SCREEN_VISIBLE_AREA(0, 256-1, 16, 256-16-1)
  	MDRV_GFXDECODE(gfxdecodeinfo)
  	MDRV_PALETTE_LENGTH(0x100)
  
  	MDRV_VIDEO_START(news)
  	MDRV_VIDEO_UPDATE(news)
  
  	/* sound hardware */
  	MDRV_SPEAKER_STANDARD_MONO("mono")
  
  	MDRV_SOUND_ADD(OKIM6295, 1056000)
  	MDRV_SOUND_CONFIG(okim6295_interface_region_1_pin7high) // clock frequency & pin 7 not verified
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
  MACHINE_DRIVER_END
  
  
  
  ROM_START( news )
  	ROM_REGION( 0x10000, REGION_CPU1, 0 )
  	ROM_LOAD( "virus.4", 0x00000, 0x08000, BAD_DUMP CRC(aa005dfb) SHA1(52f4dd399a30568851d43d052b83cfaa6682665d)  ) /* The Original was too short, I padded it with 0xFF */
  
  	ROM_REGION( 0x80000, REGION_GFX1, 0 )
  	ROM_LOAD16_BYTE( "virus.2", 0x00000, 0x40000, CRC(b5af58d8) SHA1(5dd8c6ab8b53df695463bd0c3620adf8c08daaec) )
  	ROM_LOAD16_BYTE( "virus.3", 0x00001, 0x40000, CRC(a4b1c175) SHA1(b1ac0da4d91bc3a3454ea80aa4cdbbc68bbdf7f1) )
  
  	ROM_REGION( 0x40000, REGION_SOUND1, 0 )
  	ROM_LOAD( "virus.1", 0x00000, 0x40000, CRC(41f5935a) SHA1(1566d243f165019660cd4dd69df9f049e0130f15) )
  ROM_END
  
  ROM_START( newsa )
  	ROM_REGION( 0x10000, REGION_CPU1, 0 )
  	ROM_LOAD( "newsa_virus.4", 0x00000, 0x10000, CRC(74a257da) SHA1(f1f6db521312f152ec3b1e6efa45a514433b2ffc) )
  
  	ROM_REGION( 0x80000, REGION_GFX1, 0 )
  	ROM_LOAD16_BYTE( "virus.2", 0x00000, 0x40000, CRC(b5af58d8) SHA1(5dd8c6ab8b53df695463bd0c3620adf8c08daaec) )
  	ROM_LOAD16_BYTE( "virus.3", 0x00001, 0x40000, CRC(a4b1c175) SHA1(b1ac0da4d91bc3a3454ea80aa4cdbbc68bbdf7f1) )
  
  	ROM_REGION( 0x40000, REGION_SOUND1, 0 )
  	ROM_LOAD( "virus.1", 0x00000, 0x40000, CRC(41f5935a) SHA1(1566d243f165019660cd4dd69df9f049e0130f15) )
  ROM_END
  
  GAME( 1993, news,  0,    news, news,  0, ROT0, "Poby / Virus", "News (set 1)", 0 )
  GAME( 1993, newsa, news, news, newsa, 0, ROT0, "Poby",         "News (set 2)", 0 )
  