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Diffstat (limited to 'src/mame/drivers/cking_master.cpp')
-rw-r--r-- | src/mame/drivers/cking_master.cpp | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/src/mame/drivers/cking_master.cpp b/src/mame/drivers/cking_master.cpp new file mode 100644 index 00000000000..3de15ba8803 --- /dev/null +++ b/src/mame/drivers/cking_master.cpp @@ -0,0 +1,239 @@ +// license:BSD-3-Clause +// copyright-holders:hap +// thanks-to:Berger +/****************************************************************************** +* +* cking_master.cpp, subdriver of machine/chessbase.cpp + +TODO: +- 1 WAIT CLK per M1, workaround with z80_set_cycle_tables is possible + (wait state is similar to MSX) but I can't be bothered, better solution + is to add M1 pin to the z80 core. Until then, it'll run ~20% too fast. + +******************************************************************************* + +Chess King Master overview (yes, it's plainly named "Master"): +- Z80 CPU(NEC D780C-1) @ 4MHz(8MHz XTAL), IRQ from 555 timer +- 8KB ROM(NEC D2764C-3), 2KB RAM(NEC D4016C), ROM is scrambled for easy PCB placement +- simple I/O via 2*74373 and a 74145 +- 8*8 chessboard buttons, 32+1 border leds, piezo + +******************************************************************************/ + +#include "emu.h" +#include "includes/chessbase.h" + +#include "cpu/z80/z80.h" +#include "machine/bankdev.h" +#include "sound/dac.h" +#include "sound/volt_reg.h" +#include "speaker.h" + +// internal artwork +#include "ck_master.lh" // clickable + + +namespace { + +class master_state : public chessbase_state +{ +public: + master_state(const machine_config &mconfig, device_type type, const char *tag) : + chessbase_state(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_irq_on(*this, "irq_on"), + m_dac(*this, "dac"), + m_mainmap(*this, "mainmap") + { } + + // machine drivers + void master(machine_config &config); + + void init_master(); + +private: + // devices/pointers + required_device<cpu_device> m_maincpu; + required_device<timer_device> m_irq_on; + required_device<dac_2bit_binary_weighted_ones_complement_device> m_dac; + required_device<address_map_bank_device> m_mainmap; + + // periodic interrupts + template<int Line> TIMER_DEVICE_CALLBACK_MEMBER(irq_on) { m_maincpu->set_input_line(Line, ASSERT_LINE); } + template<int Line> TIMER_DEVICE_CALLBACK_MEMBER(irq_off) { m_maincpu->set_input_line(Line, CLEAR_LINE); } + + // address maps + void main_map(address_map &map); + void main_trampoline(address_map &map); + u8 main_trampoline_r(offs_t offset); + void main_trampoline_w(offs_t offset, u8 data); + + // I/O handlers + u8 input_r(); + void control_w(u8 data); +}; + + + +/****************************************************************************** + Devices, I/O +******************************************************************************/ + +// TTL/generic + +void master_state::control_w(u8 data) +{ + // d0-d3: 74145 A-D + // 74145 0-9: input mux, led select + u16 sel = 1 << (data & 0xf) & 0x3ff; + m_inp_mux = sel; + + // d4,d5: led data + display_matrix(2, 9, data >> 4 & 3, sel & 0x1ff); + + // d6,d7: speaker +/- + m_dac->write(data >> 6 & 3); +} + +u8 master_state::input_r() +{ + // d0-d7: multiplexed inputs (active low) + return ~read_inputs(10); +} + +void master_state::init_master() +{ + u8 *rom = memregion("maincpu")->base(); + const u32 len = memregion("maincpu")->bytes(); + + // descramble data lines + for (int i = 0; i < len; i++) + rom[i] = bitswap<8>(rom[i], 4,5,0,7,6,1,3,2); + + // descramble address lines + std::vector<u8> buf(len); + memcpy(&buf[0], rom, len); + for (int i = 0; i < len; i++) + rom[i] = buf[bitswap<16>(i, 15,14,13,12,11,3,7,9, 10,8,6,5,4,2,1,0)]; +} + + + +/****************************************************************************** + Address Maps +******************************************************************************/ + +void master_state::main_map(address_map &map) +{ + map(0x0000, 0x1fff).mirror(0x6000).rom().region("maincpu", 0); // _A15 + map(0xa000, 0xa000).mirror(0x1fff).rw(FUNC(master_state::input_r), FUNC(master_state::control_w)); // A13 + map(0xc000, 0xc7ff).mirror(0x3800).ram(); // A14 +} + +// PCB design is prone to bus conflicts, but should be fine if software obeys +void master_state::main_trampoline_w(offs_t offset, u8 data) +{ + if (offset & 0x2000) + m_mainmap->write8((offset & 0x3fff) | 0x8000, data); + if (offset & 0x4000) + m_mainmap->write8((offset & 0x7fff) | 0x8000, data); +} + +u8 master_state::main_trampoline_r(offs_t offset) +{ + u8 data = 0xff; + if (~offset & 0x8000) + data &= m_mainmap->read8(offset); + if (offset & 0x2000) + data &= m_mainmap->read8((offset & 0x3fff) | 0x8000); + if (offset & 0x4000) + data &= m_mainmap->read8((offset & 0x7fff) | 0x8000); + + return data; +} + +void master_state::main_trampoline(address_map &map) +{ + map(0x0000, 0xffff).rw(FUNC(master_state::main_trampoline_r), FUNC(master_state::main_trampoline_w)); +} + + + +/****************************************************************************** + Input Ports +******************************************************************************/ + +static INPUT_PORTS_START( master ) + PORT_INCLUDE( generic_cb_buttons ) + + PORT_START("IN.8") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_NAME("Change Position") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_NAME("Clear Board") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_NAME("New Game") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_NAME("Take Back") + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_NAME("King") + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_NAME("Queen") + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7) PORT_NAME("Rook") + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("IN.9") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8) PORT_NAME("Bishop") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_9) PORT_NAME("Knight") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_0) PORT_NAME("Pawn") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Q) PORT_NAME("White") + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W) PORT_NAME("Black") + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_NAME("Move") + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("Level") + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Sound") +INPUT_PORTS_END + + + +/****************************************************************************** + Machine Drivers +******************************************************************************/ + +void master_state::master(machine_config &config) +{ + /* basic machine hardware */ + Z80(config, m_maincpu, 8_MHz_XTAL/2); + m_maincpu->set_addrmap(AS_PROGRAM, &master_state::main_trampoline); + ADDRESS_MAP_BANK(config, "mainmap").set_map(&master_state::main_map).set_options(ENDIANNESS_LITTLE, 8, 16); + + const attotime irq_period = attotime::from_hz(429); // theoretical frequency from 555 timer (22nF, 150K, 1K5), measurement was 418Hz + TIMER(config, m_irq_on).configure_periodic(FUNC(master_state::irq_on<INPUT_LINE_IRQ0>), irq_period); + m_irq_on->set_start_delay(irq_period - attotime::from_nsec(22870)); // active for 22.87us + TIMER(config, "irq_off").configure_periodic(FUNC(master_state::irq_off<INPUT_LINE_IRQ0>), irq_period); + + TIMER(config, "display_decay").configure_periodic(FUNC(master_state::display_decay_tick), attotime::from_msec(1)); + config.set_default_layout(layout_ck_master); + + /* sound hardware */ + SPEAKER(config, "speaker").front_center(); + DAC_2BIT_BINARY_WEIGHTED_ONES_COMPLEMENT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25); + voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref")); + vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); + vref.add_route(0, "dac", -1.0, DAC_VREF_NEG_INPUT); +} + + + +/****************************************************************************** + ROM Definitions +******************************************************************************/ + +ROM_START( ckmaster ) + ROM_REGION( 0x10000, "maincpu", 0 ) + ROM_LOAD("ckmaster.ic2", 0x0000, 0x2000, CRC(59cbec9e) SHA1(2e0629e65778da62bed857406b91a334698d2fe8) ) // D2764C, no label +ROM_END + +} // anonymous namespace + + + +/****************************************************************************** + Drivers +******************************************************************************/ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +CONS( 1984, ckmaster, 0, 0, master, master, master_state, init_master, "Chess King", "Master (Chess King)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS ) |