// license:BSD-3-Clause // copyright-holders:David Haywood, Pierpaolo Prazzoli /******************************************************************* R2D Tank (c) 1980 Sigma Ent. Inc. driver by: David Haywood & Pierpaolo Prazzoli from the readme ---------------------------------------------------- Orca board number OVG-17A r2d1.1c is ROM #1 at board position 1C, and so on. 1 = 2716 2 = 2732 3 = 2732 4 = 2732 5 = 2716 Sound CPU = 6809 other = HD46505SP (6845) (CRT controller) other = MB14282(x2) other = HD468458SP other = MB14282 other = MB14368 other = HD6821 (x2) (PIA) other = HD46802 other = M5L8226 (x2) RAM = 4116 (x11) ---------------------------------------------------- XTAL values appear to be 3579.545 (X1) and 11.200 (X2). ********************************************************************/ #include "emu.h" #include "cpu/m6800/m6800.h" #include "cpu/m6809/m6809.h" #include "machine/6821pia.h" #include "machine/74123.h" #include "machine/gen_latch.h" #include "machine/nvram.h" #include "machine/rescap.h" #include "sound/ay8910.h" #include "video/mc6845.h" #include "emupal.h" #include "screen.h" #include "speaker.h" #define LOG_AUDIO_COMM (0) #define MAIN_CPU_MASTER_CLOCK (11.2_MHz_XTAL) #define PIXEL_CLOCK (MAIN_CPU_MASTER_CLOCK / 2) #define CRTC_CLOCK (MAIN_CPU_MASTER_CLOCK / 16) class r2dtank_state : public driver_device { public: r2dtank_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_videoram(*this, "videoram"), m_colorram(*this, "colorram"), m_maincpu(*this, "maincpu"), m_palette(*this, "palette"), m_audiocpu(*this, "audiocpu"), m_soundlatch(*this, "soundlatch"), m_soundlatch2(*this, "soundlatch2"), m_pia_main(*this, "pia_main"), m_pia_audio(*this, "pia_audio"), m_ay1(*this, "ay1"), m_ay2(*this, "ay2") { } void r2dtank(machine_config &config); DECLARE_READ_LINE_MEMBER(ttl74123_output_r); protected: virtual void machine_start() override; private: required_shared_ptr m_videoram; required_shared_ptr m_colorram; required_device m_maincpu; required_device m_palette; required_device m_audiocpu; required_device m_soundlatch; required_device m_soundlatch2; required_device m_pia_main; required_device m_pia_audio; required_device m_ay1; required_device m_ay2; uint8_t m_flipscreen; uint32_t m_ttl74123_output; uint8_t m_AY8910_selected; DECLARE_READ8_MEMBER(audio_command_r); DECLARE_WRITE8_MEMBER(audio_command_w); DECLARE_READ8_MEMBER(audio_answer_r); DECLARE_WRITE8_MEMBER(audio_answer_w); DECLARE_WRITE_LINE_MEMBER(main_cpu_irq); DECLARE_WRITE8_MEMBER(AY8910_select_w); DECLARE_READ8_MEMBER(AY8910_port_r); DECLARE_WRITE8_MEMBER(AY8910_port_w); DECLARE_WRITE_LINE_MEMBER(flipscreen_w); DECLARE_WRITE8_MEMBER(pia_comp_w); DECLARE_WRITE_LINE_MEMBER(ttl74123_output_changed); MC6845_UPDATE_ROW(crtc_update_row); void r2dtank_audio_map(address_map &map); void r2dtank_main_map(address_map &map); }; /************************************* * * Interrupt generation * *************************************/ WRITE_LINE_MEMBER(r2dtank_state::main_cpu_irq) { int combined_state = m_pia_main->irq_a_state() | m_pia_main->irq_b_state() | m_pia_audio->irq_a_state() | m_pia_audio->irq_b_state(); m_maincpu->set_input_line(M6809_IRQ_LINE, combined_state ? ASSERT_LINE : CLEAR_LINE); } /************************************* * * Audio system - CPU 1 * *************************************/ READ8_MEMBER(r2dtank_state::audio_command_r) { uint8_t ret = m_soundlatch->read(); if (LOG_AUDIO_COMM) logerror("%08X CPU#1 Audio Command Read: %x\n", m_audiocpu->pc(), ret); return ret; } WRITE8_MEMBER(r2dtank_state::audio_command_w) { m_soundlatch->write(~data); m_audiocpu->set_input_line(M6802_IRQ_LINE, HOLD_LINE); if (LOG_AUDIO_COMM) logerror("%08X CPU#0 Audio Command Write: %x\n", m_maincpu->pc(), data^0xff); } READ8_MEMBER(r2dtank_state::audio_answer_r) { uint8_t ret = m_soundlatch2->read(); if (LOG_AUDIO_COMM) logerror("%08X CPU#0 Audio Answer Read: %x\n", m_maincpu->pc(), ret); return ret; } WRITE8_MEMBER(r2dtank_state::audio_answer_w) { /* HACK - prevents lock-up, but causes game to end some in-between sreens prematurely */ if (m_audiocpu->pc() == 0xfb12) data = 0x00; m_soundlatch2->write(data); m_maincpu->set_input_line(M6809_IRQ_LINE, HOLD_LINE); if (LOG_AUDIO_COMM) logerror("%08X CPU#1 Audio Answer Write: %x\n", m_audiocpu->pc(), data); } WRITE8_MEMBER(r2dtank_state::AY8910_select_w) { /* not sure what all the bits mean: D0 - ????? definetely used D1 - not used? D2 - selects ay8910 control or port D3 - selects ay8910 #0 D4 - selects ay8910 #1 D5-D7 - not used */ m_AY8910_selected = data; if (LOG_AUDIO_COMM) logerror("%s: CPU#1 AY8910_select_w: %x\n", machine().describe_context(), data); } READ8_MEMBER(r2dtank_state::AY8910_port_r) { uint8_t ret = 0; if (m_AY8910_selected & 0x08) ret = m_ay1->data_r(); if (m_AY8910_selected & 0x10) ret = m_ay2->data_r(); return ret; } WRITE8_MEMBER(r2dtank_state::AY8910_port_w) { if (m_AY8910_selected & 0x08) m_ay1->data_address_w(m_AY8910_selected >> 2, data); if (m_AY8910_selected & 0x10) m_ay2->data_address_w(m_AY8910_selected >> 2, data); } /************************************* * * 74123 * * This timer is responsible for * delaying the PIA1's port input. * This delay ensures that * CA1 is only changed in the VBLANK * region, but not in HBLANK * *************************************/ WRITE_LINE_MEMBER(r2dtank_state::ttl74123_output_changed) { m_pia_main->ca1_w(state); m_ttl74123_output = state; } READ_LINE_MEMBER(r2dtank_state::ttl74123_output_r) { return m_ttl74123_output; } /************************************* * * Machine start * *************************************/ void r2dtank_state::machine_start() { /* setup for save states */ save_item(NAME(m_flipscreen)); save_item(NAME(m_ttl74123_output)); save_item(NAME(m_AY8910_selected)); } /************************************* * * Video system * *************************************/ WRITE_LINE_MEMBER(r2dtank_state::flipscreen_w) { m_flipscreen = !state; } MC6845_UPDATE_ROW( r2dtank_state::crtc_update_row ) { uint8_t x = 0; for (uint8_t cx = 0; cx < x_count; cx++) { uint8_t data, fore_color; /* the memory is hooked up to the MA, RA lines this way */ offs_t offs = ((ma << 3) & 0x1f00) | ((ra << 5) & 0x00e0) | ((ma << 0) & 0x001f); if (m_flipscreen) offs = offs ^ 0x1fff; data = m_videoram[offs]; fore_color = (m_colorram[offs] >> 5) & 0x07; for (int i = 0; i < 8; i++) { uint8_t bit, color; if (m_flipscreen) { bit = data & 0x01; data = data >> 1; } else { bit = data & 0x80; data = data << 1; } color = bit ? fore_color : 0; bitmap.pix32(y, x) = m_palette->pen_color(color); x = x + 1; } ma = ma + 1; } } /************************************* * * Memory handlers * *************************************/ WRITE8_MEMBER(r2dtank_state::pia_comp_w) { m_pia_main->write(offset, ~data); } void r2dtank_state::r2dtank_main_map(address_map &map) { map(0x0000, 0x1fff).ram().share("videoram"); map(0x2000, 0x3fff).ram(); map(0x4000, 0x5fff).ram().share("colorram"); map(0x6000, 0x7fff).ram(); map(0x8000, 0x8003).r("pia_main", FUNC(pia6821_device::read)).w(FUNC(r2dtank_state::pia_comp_w)); map(0x8004, 0x8004).rw(FUNC(r2dtank_state::audio_answer_r), FUNC(r2dtank_state::audio_command_w)); map(0xb000, 0xb000).w("crtc", FUNC(mc6845_device::address_w)); map(0xb001, 0xb001).w("crtc", FUNC(mc6845_device::register_w)); map(0xc000, 0xc007).ram().share("nvram"); map(0xc800, 0xffff).rom(); } void r2dtank_state::r2dtank_audio_map(address_map &map) { map(0x0000, 0x007f).ram(); /* internal RAM */ map(0xd000, 0xd003).rw("pia_audio", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0xf000, 0xf000).rw(FUNC(r2dtank_state::audio_command_r), FUNC(r2dtank_state::audio_answer_w)); map(0xf800, 0xffff).rom(); } /************************************* * * Port definition * *************************************/ static INPUT_PORTS_START( r2dtank ) PORT_START("IN0") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_SERVICE_NO_TOGGLE(0x04, IP_ACTIVE_LOW) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 ) PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_MEMBER(r2dtank_state, ttl74123_output_r) PORT_START("IN1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_COCKTAIL PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_COCKTAIL PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_COCKTAIL PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_COCKTAIL PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_START("DSWA") PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x01, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x04, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x00, DEF_STR( Lives ) ) PORT_DIPSETTING( 0x00, "3" ) PORT_DIPSETTING( 0x10, "4" ) PORT_DIPNAME( 0x20, 0x20, DEF_STR( Cabinet ) ) PORT_DIPSETTING( 0x20, DEF_STR( Upright ) ) PORT_DIPSETTING( 0x00, DEF_STR( Cocktail ) ) PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ) ) PORT_DIPSETTING( 0x40, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x80, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0xc0, DEF_STR( Free_Play ) ) PORT_START("DSWB") PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x01, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x02, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x04, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x08, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x10, DEF_STR( On ) ) PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x20, DEF_STR( On ) ) PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x40, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x80, DEF_STR( On ) ) INPUT_PORTS_END /************************************* * * Machine driver * *************************************/ void r2dtank_state::r2dtank(machine_config &config) { MC6809(config, m_maincpu, MAIN_CPU_MASTER_CLOCK / 4); // divider guessed m_maincpu->set_addrmap(AS_PROGRAM, &r2dtank_state::r2dtank_main_map); M6802(config, m_audiocpu, 3.579545_MHz_XTAL); m_audiocpu->set_addrmap(AS_PROGRAM, &r2dtank_state::r2dtank_audio_map); NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); /* video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_raw(PIXEL_CLOCK, 360, 0, 256, 276, 0, 224); screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update)); PALETTE(config, m_palette, palette_device::BGR_3BIT); mc6845_device &crtc(MC6845(config, "crtc", CRTC_CLOCK)); crtc.set_screen("screen"); crtc.set_show_border_area(false); crtc.set_char_width(8); crtc.set_update_row_callback(FUNC(r2dtank_state::crtc_update_row)); crtc.out_de_callback().set("74123", FUNC(ttl74123_device::a_w)); /* 74LS123 */ ttl74123_device &ttl74123(TTL74123(config, "74123", 0)); ttl74123.set_connection_type(TTL74123_GROUNDED); /* the hook up type */ ttl74123.set_resistor_value(RES_K(22)); /* resistor connected to RCext */ ttl74123.set_capacitor_value(CAP_U(0.01)); /* capacitor connected to Cext and RCext */ ttl74123.set_a_pin_value(1); /* A pin - driven by the CRTC */ ttl74123.set_b_pin_value(1); /* B pin - pulled high */ ttl74123.set_clear_pin_value(1); /* Clear pin - pulled high */ ttl74123.out_cb().set(FUNC(r2dtank_state::ttl74123_output_changed)); PIA6821(config, m_pia_main, 0); m_pia_main->readpa_handler().set_ioport("IN0"); m_pia_main->readpb_handler().set_ioport("IN1"); m_pia_main->cb2_handler().set(FUNC(r2dtank_state::flipscreen_w)); m_pia_main->irqa_handler().set(FUNC(r2dtank_state::main_cpu_irq)); m_pia_main->irqb_handler().set(FUNC(r2dtank_state::main_cpu_irq)); PIA6821(config, m_pia_audio, 0); m_pia_audio->readpa_handler().set(FUNC(r2dtank_state::AY8910_port_r)); m_pia_audio->writepa_handler().set(FUNC(r2dtank_state::AY8910_port_w)); m_pia_audio->writepb_handler().set(FUNC(r2dtank_state::AY8910_select_w)); m_pia_audio->irqa_handler().set(FUNC(r2dtank_state::main_cpu_irq)); m_pia_audio->irqb_handler().set(FUNC(r2dtank_state::main_cpu_irq)); /* audio hardware */ SPEAKER(config, "mono").front_center(); GENERIC_LATCH_8(config, m_soundlatch); GENERIC_LATCH_8(config, m_soundlatch2); AY8910(config, m_ay1, 3.579545_MHz_XTAL / 4); // probably E clock from MC6802 m_ay1->port_a_read_callback().set_ioport("DSWB"); m_ay1->add_route(ALL_OUTPUTS, "mono", 0.25); AY8910(config, m_ay2, 3.579545_MHz_XTAL / 4); m_ay2->port_a_read_callback().set_ioport("IN1"); m_ay2->port_b_read_callback().set_ioport("DSWA"); m_ay2->add_route(ALL_OUTPUTS, "mono", 0.25); } /************************************* * * ROM definition * *************************************/ ROM_START( r2dtank ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "r2d1.1c", 0xc800, 0x0800, CRC(20606a0f) SHA1(9a55e595c7ea332bdc89142338947be8a28a92a3) ) ROM_LOAD( "r2d2.1a", 0xd000, 0x1000, CRC(7561c67f) SHA1(cccc7bbd7975db340fe571a4c31c25b41b2563b8) ) ROM_LOAD( "r2d3.2c", 0xe000, 0x1000, CRC(fc53c538) SHA1(8f9a2edcf7a2cb2a8ddd084828b52f1bf45f434a) ) ROM_LOAD( "r2d4.2a", 0xf000, 0x1000, CRC(56636225) SHA1(dcfc6e29b4c51a45cfbecf6790b7d88b89af433b) ) ROM_REGION( 0x10000, "audiocpu", 0 ) ROM_LOAD( "r2d5.7l", 0xf800, 0x0800, CRC(c49bed15) SHA1(ffa635a65c024c532bb13fb91bbd3e54923e81bf) ) ROM_END /************************************* * * Game driver * *************************************/ GAME( 1980, r2dtank, 0, r2dtank, r2dtank, r2dtank_state, empty_init, ROT270, "Sigma Enterprises Inc.", "R2D Tank", MACHINE_SUPPORTS_SAVE)