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/***************************************************************************
Mini Vaders (Space Invaders's mini game)
(c)1990 Taito Corporation
Driver by Takahiro Nogi (nogi@kt.rim.or.jp) 1999/12/19 -
This is a test board sold together with the cabinet (as required by law in
Japan). It has no sound.
***************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
class minivadr_state : public driver_device
{
public:
minivadr_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_videoram(*this, "videoram"),
m_maincpu(*this, "maincpu") { }
/* memory pointers */
required_shared_ptr<UINT8> m_videoram;
UINT32 screen_update_minivadr(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
required_device<cpu_device> m_maincpu;
};
/*************************************
*
* Video update
*
*************************************/
UINT32 minivadr_state::screen_update_minivadr(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
offs_t offs;
for (offs = 0; offs < m_videoram.bytes(); offs++)
{
int i;
UINT8 x = offs << 3;
int y = offs >> 5;
UINT8 data = m_videoram[offs];
for (i = 0; i < 8; i++)
{
pen_t pen = (data & 0x80) ? rgb_t::white : rgb_t::black;
bitmap.pix32(y, x) = pen;
data = data << 1;
x = x + 1;
}
}
return 0;
}
static ADDRESS_MAP_START( minivadr_map, AS_PROGRAM, 8, minivadr_state )
AM_RANGE(0x0000, 0x1fff) AM_ROM
AM_RANGE(0xa000, 0xbfff) AM_RAM AM_SHARE("videoram")
AM_RANGE(0xe008, 0xe008) AM_READ_PORT("INPUTS") AM_WRITENOP // W - ???
ADDRESS_MAP_END
static INPUT_PORTS_START( minivadr )
PORT_START("INPUTS")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
INPUT_PORTS_END
static MACHINE_CONFIG_START( minivadr, minivadr_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80,24000000 / 6) /* 4 MHz ? */
MCFG_CPU_PROGRAM_MAP(minivadr_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", minivadr_state, irq0_line_hold)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
MCFG_SCREEN_SIZE(256, 256)
MCFG_SCREEN_VISIBLE_AREA(0, 256-1, 16, 240-1)
MCFG_SCREEN_UPDATE_DRIVER(minivadr_state, screen_update_minivadr)
/* the board has no sound hardware */
MACHINE_CONFIG_END
/***************************************************************************
Game driver(s)
***************************************************************************/
ROM_START( minivadr )
ROM_REGION( 0x10000, "maincpu", 0 )
ROM_LOAD( "d26-01.bin", 0x0000, 0x2000, CRC(a96c823d) SHA1(aa9969ff80e94b0fff0f3530863f6b300510162e) )
ROM_END
GAME( 1990, minivadr, 0, minivadr, minivadr, driver_device, 0, ROT0, "Taito Corporation", "Mini Vaders", GAME_SUPPORTS_SAVE | GAME_NO_SOUND_HW )
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