diff options
Diffstat (limited to 'src/mame/sigma/r2dtank.cpp')
-rw-r--r-- | src/mame/sigma/r2dtank.cpp | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/src/mame/sigma/r2dtank.cpp b/src/mame/sigma/r2dtank.cpp new file mode 100644 index 00000000000..a33efcf7085 --- /dev/null +++ b/src/mame/sigma/r2dtank.cpp @@ -0,0 +1,511 @@ +// 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 (1U << 1) + +#define VERBOSE (0) +#include "logmacro.h" + + +namespace { + +#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); + +protected: + virtual void machine_start() override ATTR_COLD; + +private: + required_shared_ptr<uint8_t> m_videoram; + required_shared_ptr<uint8_t> m_colorram; + required_device<cpu_device> m_maincpu; + required_device<palette_device> m_palette; + required_device<cpu_device> m_audiocpu; + required_device<generic_latch_8_device> m_soundlatch; + required_device<generic_latch_8_device> m_soundlatch2; + required_device<pia6821_device> m_pia_main; + required_device<pia6821_device> m_pia_audio; + required_device<ay8910_device> m_ay1; + required_device<ay8910_device> m_ay2; + + uint8_t m_flipscreen = 0; + uint8_t m_AY8910_selected = 0; + + uint8_t audio_command_r(); + void audio_command_w(uint8_t data); + uint8_t audio_answer_r(); + void audio_answer_w(uint8_t data); + void main_cpu_irq(int state); + void AY8910_select_w(uint8_t data); + uint8_t AY8910_port_r(); + void AY8910_port_w(uint8_t data); + void flipscreen_w(int state); + void pia_comp_w(offs_t offset, uint8_t data); + + MC6845_UPDATE_ROW(crtc_update_row); + + void r2dtank_audio_map(address_map &map) ATTR_COLD; + void r2dtank_main_map(address_map &map) ATTR_COLD; +}; + + + +/************************************* + * + * Interrupt generation + * + *************************************/ + +void r2dtank_state::main_cpu_irq(int state) +{ + 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 + * + *************************************/ + +uint8_t r2dtank_state::audio_command_r() +{ + uint8_t ret = m_soundlatch->read(); + LOGMASKED(LOG_AUDIO_COMM, "%08X CPU#1 Audio Command Read: %x\n", m_audiocpu->pc(), ret); + + return ret; +} + + +void r2dtank_state::audio_command_w(uint8_t data) +{ + m_soundlatch->write(~data); + m_audiocpu->set_input_line(M6802_IRQ_LINE, HOLD_LINE); + + LOGMASKED(LOG_AUDIO_COMM, "%08X CPU#0 Audio Command Write: %x\n", m_maincpu->pc(), data^0xff); +} + + +uint8_t r2dtank_state::audio_answer_r() +{ + uint8_t ret = m_soundlatch2->read(); + LOGMASKED(LOG_AUDIO_COMM, "%08X CPU#0 Audio Answer Read: %x\n", m_maincpu->pc(), ret); + + return ret; +} + + +void r2dtank_state::audio_answer_w(uint8_t data) +{ + /* HACK - prevents lock-up, but causes game to end some in-between screens prematurely */ + if (m_audiocpu->pc() == 0xfb12) + data = 0x00; + + m_soundlatch2->write(data); + m_maincpu->set_input_line(M6809_IRQ_LINE, HOLD_LINE); + + LOGMASKED(LOG_AUDIO_COMM, "%08X CPU#1 Audio Answer Write: %x\n", m_audiocpu->pc(), data); +} + + +void r2dtank_state::AY8910_select_w(uint8_t data) +{ + /* not sure what all the bits mean: + D0 - ????? definitely 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; + + LOGMASKED(LOG_AUDIO_COMM, "%s: CPU#1 AY8910_select_w: %x\n", machine().describe_context(), data); +} + + +uint8_t 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; +} + + +void r2dtank_state::AY8910_port_w(uint8_t data) +{ + 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); +} + + + +/************************************* + * + * Machine start + * + *************************************/ + +void r2dtank_state::machine_start() +{ + /* setup for save states */ + save_item(NAME(m_flipscreen)); + save_item(NAME(m_AY8910_selected)); +} + + + +/************************************* + * + * Video system + * + *************************************/ + +void r2dtank_state::flipscreen_w(int state) +{ + m_flipscreen = !state; +} + + +MC6845_UPDATE_ROW( r2dtank_state::crtc_update_row ) +{ + uint8_t x = 0; + + for (uint8_t cx = 0; cx < x_count; cx++) + { + /* 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; + + uint8_t data = m_videoram[offs]; + uint8_t fore_color = (m_colorram[offs] >> 5) & 0x07; + + for (int i = 0; i < 8; i++) + { + uint8_t bit; + + if (m_flipscreen) + { + bit = data & 0x01; + data >>= 1; + } + else + { + bit = data & 0x80; + data <<= 1; + } + + uint8_t const color = bit ? fore_color : 0; + bitmap.pix(y, x) = m_palette->pen_color(color); + + x++; + } + + ma++; + } +} + + + +/************************************* + * + * Memory handlers + * + *************************************/ + +void r2dtank_state::pia_comp_w(offs_t offset, uint8_t data) +{ + 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(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_DEVICE_MEMBER("74123", FUNC(ttl74123_device::q_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, 0x08, DEF_STR( Bonus_Life ) ) + PORT_DIPSETTING( 0x00, "5000" ) + PORT_DIPSETTING( 0x08, "10000" ) + 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: 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. */ + 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(m_pia_main, FUNC(pia6821_device::ca1_w)); + + PIA6821(config, m_pia_main); + 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); + 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 + +} // anonymous namespace + + + +/************************************* + * + * Game driver + * + *************************************/ + +GAME( 1980, r2dtank, 0, r2dtank, r2dtank, r2dtank_state, empty_init, ROT270, "Sigma Enterprises Inc.", "R2D Tank", MACHINE_SUPPORTS_SAVE) |