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Diffstat (limited to 'src/mame/drivers/fidel_sc12.cpp')
-rw-r--r-- | src/mame/drivers/fidel_sc12.cpp | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/src/mame/drivers/fidel_sc12.cpp b/src/mame/drivers/fidel_sc12.cpp new file mode 100644 index 00000000000..f58b6828912 --- /dev/null +++ b/src/mame/drivers/fidel_sc12.cpp @@ -0,0 +1,241 @@ +// license:BSD-3-Clause +// copyright-holders:hap +// thanks-to:Berger,yoyo_chessboard +/****************************************************************************** + +Sensory 12 Chess Challenger (SC12-B, 6086) +4 versions are known to exist: A,B,C, and X, with increasing CPU speed. +--------------------------------- +RE information from netlist by Berger + +8*(8+1) buttons, 8+8+2 red LEDs +DIN 41524C printer port +36-pin edge connector +CPU is a R65C02P4, running at 4MHz* + +*By default, the CPU frequency is lowered on A13/A14 access, with a factory-set jumper: +/2 on model SC12(1.5MHz), /4 on model 6086(1MHz) + +NE556 dual-timer IC: +- timer#1, one-shot at power-on, to CPU _RESET +- timer#2: R1=82K+50K pot at 26K, R2=1K, C=22nF, to CPU _IRQ: ~596Hz, active low=15.25us + +Memory map: +----------- +0000-0FFF: 4K RAM (2016 * 2) +2000-5FFF: cartridge +6000-7FFF: control(W) +8000-9FFF: 8K ROM SSS SCM23C65E4 +A000-BFFF: keypad(R) +C000-DFFF: 4K ROM TI TMS2732AJL-45 +E000-FFFF: 8K ROM Toshiba TMM2764D-2 + +control: (74LS377) +-------- +Q0-Q3: 7442 A0-A3 +Q4: enable printer port pin 1 input +Q5: printer port pin 5 output +Q6,Q7: LEDs common anode + +7442 0-8: input mux and LEDs cathode +7442 9: buzzer + +The keypad is read through a 74HC251, where S0,1,2 is from CPU A0,1,2, Y is connected to CPU D7. +If control Q4 is set, printer data can be read from I0. + +******************************************************************************/ + +#include "emu.h" +#include "includes/fidelbase.h" + +#include "cpu/m6502/r65c02.h" +#include "sound/volt_reg.h" +#include "speaker.h" + +// internal artwork +#include "fidel_sc12.lh" // clickable + + +namespace { + +class sc12_state : public fidelbase_state +{ +public: + sc12_state(const machine_config &mconfig, device_type type, const char *tag) : + fidelbase_state(mconfig, type, tag) + { } + + // machine drivers + void sc12(machine_config &config); + void sc12b(machine_config &config); + +private: + void main_map(address_map &map); + + // I/O handlers + DECLARE_WRITE8_MEMBER(control_w); + DECLARE_READ8_MEMBER(input_r); +}; + + + +/****************************************************************************** + Devices, I/O +******************************************************************************/ + +// TTL/generic + +WRITE8_MEMBER(sc12_state::control_w) +{ + // d0-d3: 7442 a0-a3 + // 7442 0-8: led data, input mux + u16 sel = 1 << (data & 0xf) & 0x3ff; + m_inp_mux = sel & 0x1ff; + + // 7442 9: speaker out + m_dac->write(BIT(sel, 9)); + + // d6,d7: led select (active low) + display_matrix(9, 2, sel & 0x1ff, ~data >> 6 & 3); + + // d4,d5: printer + //.. +} + +READ8_MEMBER(sc12_state::input_r) +{ + // a0-a2,d7: multiplexed inputs (active low) + return (read_inputs(9) >> offset & 1) ? 0 : 0x80; +} + + + +/****************************************************************************** + Address Maps +******************************************************************************/ + +void sc12_state::main_map(address_map &map) +{ + map.unmap_value_high(); + map(0x0000, 0x0fff).ram(); + map(0x2000, 0x5fff).r(FUNC(sc12_state::cartridge_r)); + map(0x6000, 0x6000).mirror(0x1fff).w(FUNC(sc12_state::control_w)); + map(0x8000, 0x9fff).rom(); + map(0xa000, 0xa007).mirror(0x1ff8).r(FUNC(sc12_state::input_r)); + map(0xc000, 0xcfff).mirror(0x1000).rom(); + map(0xe000, 0xffff).rom(); +} + + + +/****************************************************************************** + Input Ports +******************************************************************************/ + +static INPUT_PORTS_START( sc12_sidepanel ) + PORT_START("IN.8") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("RV / Pawn") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("DM / Knight") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("TB / Bishop") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("LV / Rook") + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("PV / Queen") + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("PB / King") + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_DEL) PORT_NAME("CL") + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("RE") +INPUT_PORTS_END + +static INPUT_PORTS_START( sc12 ) + PORT_INCLUDE( fidel_cpu_div_2 ) + PORT_INCLUDE( fidel_cb_buttons ) + PORT_INCLUDE( sc12_sidepanel ) +INPUT_PORTS_END + +static INPUT_PORTS_START( sc12b ) + PORT_INCLUDE( fidel_cpu_div_4 ) + PORT_INCLUDE( fidel_cb_buttons ) + PORT_INCLUDE( sc12_sidepanel ) +INPUT_PORTS_END + + + +/****************************************************************************** + Machine Drivers +******************************************************************************/ + +void sc12_state::sc12(machine_config &config) +{ + /* basic machine hardware */ + R65C02(config, m_maincpu, 3_MHz_XTAL); // R65C02P3 + m_maincpu->set_addrmap(AS_PROGRAM, &sc12_state::div_trampoline); + ADDRESS_MAP_BANK(config, m_mainmap).set_map(&sc12_state::main_map).set_options(ENDIANNESS_LITTLE, 8, 16); + + TIMER(config, "dummy_timer").configure_periodic(timer_device::expired_delegate(), attotime::from_hz(3_MHz_XTAL)); + + const attotime irq_period = attotime::from_hz(630); // from 556 timer (22nF, 102K, 1K) + TIMER(config, m_irq_on).configure_periodic(FUNC(sc12_state::irq_on<M6502_IRQ_LINE>), irq_period); + m_irq_on->set_start_delay(irq_period - attotime::from_nsec(15250)); // active for 15.25us + TIMER(config, "irq_off").configure_periodic(FUNC(sc12_state::irq_off<M6502_IRQ_LINE>), irq_period); + + TIMER(config, "display_decay").configure_periodic(FUNC(fidelbase_state::display_decay_tick), attotime::from_msec(1)); + config.set_default_layout(layout_fidel_sc12); + + /* sound hardware */ + SPEAKER(config, "speaker").front_center(); + DAC_1BIT(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.25); + voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref")); + vref.set_output(5.0); + vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); + + /* cartridge */ + generic_cartslot_device &cartslot(GENERIC_CARTSLOT(config, "cartslot", generic_plain_slot, "fidel_scc", "bin,dat")); + cartslot.set_device_load(device_image_load_delegate(&fidelbase_state::device_image_load_scc_cartridge, this)); + + SOFTWARE_LIST(config, "cart_list").set_original("fidel_scc"); +} + +void sc12_state::sc12b(machine_config &config) +{ + sc12(config); + + /* basic machine hardware */ + m_maincpu->set_clock(4_MHz_XTAL); // R65C02P4 + TIMER(config.replace(), "dummy_timer").configure_periodic(timer_device::expired_delegate(), attotime::from_hz(4_MHz_XTAL)); + + // change irq timer frequency + const attotime irq_period = attotime::from_hz(596); // from 556 timer (22nF, 82K+26K, 1K) + TIMER(config.replace(), m_irq_on).configure_periodic(FUNC(sc12_state::irq_on<M6502_IRQ_LINE>), irq_period); + m_irq_on->set_start_delay(irq_period - attotime::from_nsec(15250)); // active for 15.25us + TIMER(config.replace(), "irq_off").configure_periodic(FUNC(sc12_state::irq_off<M6502_IRQ_LINE>), irq_period); +} + + + +/****************************************************************************** + ROM Definitions +******************************************************************************/ + +ROM_START( fscc12 ) // model SC12, PCB label 510-1084B01 + ROM_REGION( 0x10000, "mainmap", 0 ) + ROM_LOAD("101-1068a01.ic15", 0x8000, 0x2000, CRC(63c76cdd) SHA1(e0771c98d4483a6b1620791cb99a7e46b0db95c4) ) // SSS SCM23C65E4 + ROM_LOAD("orange.ic13", 0xc000, 0x1000, CRC(ed5289b2) SHA1(9b0c7f9ae4102d4a66eb8c91d4e84b9eec2ffb3d) ) // TI TMS2732AJL-45, no label, orange sticker + ROM_LOAD("red.ic14", 0xe000, 0x2000, CRC(0c4968c4) SHA1(965a66870b0f8ce9549418cbda09d2ff262a1504) ) // TI TMS2764JL-25, no label, red sticker +ROM_END + +ROM_START( fscc12b ) // model 6086, PCB label 510-1084B01 + ROM_REGION( 0x10000, "mainmap", 0 ) + ROM_LOAD("101-1068a01.ic15", 0x8000, 0x2000, CRC(63c76cdd) SHA1(e0771c98d4483a6b1620791cb99a7e46b0db95c4) ) // SSS SCM23C65E4 + ROM_LOAD("orange.ic13", 0xc000, 0x1000, CRC(45070a71) SHA1(8aeecff828f26fb7081902c757559903be272649) ) // TI TMS2732AJL-45, no label, orange sticker + ROM_LOAD("red.ic14", 0xe000, 0x2000, CRC(183d3edc) SHA1(3296a4c3bce5209587d4a1694fce153558544e63) ) // Toshiba TMM2764D-2, no label, red sticker +ROM_END + +} // anonymous namespace + + + +/****************************************************************************** + Drivers +******************************************************************************/ + +// YEAR NAME PARENT CMP MACHINE INPUT STATE INIT COMPANY, FULLNAME, FLAGS +CONS( 1984, fscc12, 0, 0, sc12, sc12, sc12_state, empty_init, "Fidelity Electronics", "Sensory Chess Challenger 12", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS | MACHINE_IMPERFECT_TIMING ) +CONS( 1984, fscc12b, fscc12, 0, sc12b, sc12b, sc12_state, empty_init, "Fidelity Electronics", "Sensory Chess Challenger 12-B", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS | MACHINE_IMPERFECT_TIMING ) |