// license:BSD-3-Clause // copyright-holders:Takahiro Nogi /*************************************************************************** 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. PCB Layout ---------- K11X0622A MINI VADERS |-------------------------| |MB3771 24MHz | |LS32 74F74 | |LS139 | |D26_01.IC7 LS244 J| |Z80 LS244 A| |LS86 LS08 LS373 M| |LS157 LS157 LS161 LS161 M| |LS157 LS157 LS161 LS161 A| |6116 LS157 LS08 | |LS74 LS74 LS74 LS157 | |-------------------------| Notes: (all ICs shown) Z80 - Clock 4MHz [24/6] 6116 - 2Kbx8 SRAM D26_01.IC7 - 27C64 8Kbx8 EPROM ***************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "screen.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 m_videoram; uint32_t screen_update_minivadr(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); required_device m_maincpu; void minivadr(machine_config &config); void minivadr_map(address_map &map); }; /************************************* * * Video update * *************************************/ uint32_t 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_t x = offs << 3; int y = offs >> 5; uint8_t 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; } void minivadr_state::minivadr_map(address_map &map) { map(0x0000, 0x1fff).rom(); map(0xa000, 0xbfff).ram().share("videoram"); map(0xe008, 0xe008).portr("INPUTS").nopw(); // W - ??? } 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 MACHINE_CONFIG_START(minivadr_state::minivadr) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu", Z80, XTAL(24'000'000) / 6) MCFG_DEVICE_PROGRAM_MAP(minivadr_map) MCFG_DEVICE_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.ic7", 0x0000, 0x2000, CRC(a96c823d) SHA1(aa9969ff80e94b0fff0f3530863f6b300510162e) ) ROM_END GAME( 1990, minivadr, 0, minivadr, minivadr, minivadr_state, empty_init, ROT0, "Taito Corporation", "Mini Vaders", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND_HW )