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Diffstat (limited to 'src/mame/drivers/fidel_as12.cpp')
-rw-r--r-- | src/mame/drivers/fidel_as12.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/mame/drivers/fidel_as12.cpp b/src/mame/drivers/fidel_as12.cpp new file mode 100644 index 00000000000..9b27dc53940 --- /dev/null +++ b/src/mame/drivers/fidel_as12.cpp @@ -0,0 +1,192 @@ +// license:BSD-3-Clause +// copyright-holders:hap +// thanks-to:yoyo_chessboard +/****************************************************************************** +* +* fidel_as12.cpp, subdriver of machine/fidelbase.cpp, machine/chessbase.cpp + +******************************************************************************* + +Fidelity Elegance Chess Challenger (AS12) overview: +- R65C02P4 CPU @ 4MHz +- 3*8KB ROM(TMM2764), 2*2KB RAM(HM6116) +- PCB label 510-1084B01 + +This is on the SC12B board, with enough modifications to support more leds and +magnetic chess board sensors. See fidel_sc12.cpp for a more technical description. + +******************************************************************************/ + +#include "emu.h" +#include "includes/fidelbase.h" + +#include "cpu/m6502/r65c02.h" +#include "sound/volt_reg.h" +#include "speaker.h" + +// internal artwork +#include "fidel_as12.lh" // clickable + + +namespace { + +class as12_state : public fidelbase_state +{ +public: + as12_state(const machine_config &mconfig, device_type type, const char *tag) : + fidelbase_state(mconfig, type, tag) + { } + + // machine drivers + void as12(machine_config &config); + +private: + // address maps + void main_map(address_map &map); + + // I/O handlers + void prepare_display(); + DECLARE_WRITE8_MEMBER(control_w); + DECLARE_WRITE8_MEMBER(led_w); + DECLARE_READ8_MEMBER(input_r); +}; + + +/****************************************************************************** + Devices, I/O +******************************************************************************/ + +// TTL/generic + +void as12_state::prepare_display() +{ + // 8*8(+1) chessboard leds + display_matrix(8, 9, m_led_data, m_inp_mux); +} + +WRITE8_MEMBER(as12_state::control_w) +{ + // d0-d3: 74245 P0-P3 + // 74245 Q0-Q8: input mux, led select + u16 sel = 1 << (data & 0xf) & 0x3ff; + m_inp_mux = bitswap<9>(sel,5,8,7,6,4,3,1,0,2); + prepare_display(); + + // 74245 Q9: speaker out + m_dac->write(BIT(sel, 9)); + + // d4,d5: printer? + // d6,d7: N/C? +} + +WRITE8_MEMBER(as12_state::led_w) +{ + // a0-a2,d0: led data via NE591N + m_led_data = (data & 1) << offset; + prepare_display(); +} + +READ8_MEMBER(as12_state::input_r) +{ + // a0-a2,d7: multiplexed inputs (active low) + u8 inp = bitswap<8>(read_inputs(9),4,3,2,1,0,5,6,7); + return (inp >> offset & 1) ? 0 : 0x80; +} + + + +/****************************************************************************** + Address Maps +******************************************************************************/ + +void as12_state::main_map(address_map &map) +{ + map.unmap_value_high(); + map(0x0000, 0x0fff).ram(); + map(0x1800, 0x1807).w(FUNC(as12_state::led_w)).nopr(); + map(0x2000, 0x5fff).r(FUNC(as12_state::cartridge_r)); + map(0x6000, 0x6000).mirror(0x1fff).w(FUNC(as12_state::control_w)); + map(0x8000, 0x9fff).rom(); + map(0xa000, 0xa007).mirror(0x1ff8).r(FUNC(as12_state::input_r)); + map(0xc000, 0xffff).rom(); +} + + + +/****************************************************************************** + Input Ports +******************************************************************************/ + +static INPUT_PORTS_START( as12 ) + PORT_INCLUDE( fidel_cpu_div_4 ) + PORT_INCLUDE( generic_cb_magnets ) + + 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 + + + +/****************************************************************************** + Machine Drivers +******************************************************************************/ + +void as12_state::as12(machine_config &config) +{ + /* basic machine hardware */ + R65C02(config, m_maincpu, 4_MHz_XTAL); // R65C02P4 + m_maincpu->set_addrmap(AS_PROGRAM, &as12_state::div_trampoline); + ADDRESS_MAP_BANK(config, m_mainmap).set_map(&as12_state::main_map).set_options(ENDIANNESS_LITTLE, 8, 16); + + TIMER(config, "dummy_timer").configure_periodic(timer_device::expired_delegate(), attotime::from_hz(4_MHz_XTAL)); + + const attotime irq_period = attotime::from_hz(585); // from 556 timer (22nF, 110K, 1K) + TIMER(config, m_irq_on).configure_periodic(FUNC(as12_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(as12_state::irq_off<M6502_IRQ_LINE>), irq_period); + + TIMER(config, "display_decay").configure_periodic(FUNC(as12_state::display_decay_tick), attotime::from_msec(1)); + config.set_default_layout(layout_fidel_as12); + + /* sound hardware */ + SPEAKER(config, "speaker").front_center(); + DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25); + VOLTAGE_REGULATOR(config, "vref").add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); + + /* cartridge */ + GENERIC_CARTSLOT(config, m_cart, generic_plain_slot, "fidel_scc", "bin,dat"); + m_cart->set_device_load(device_image_load_delegate(&as12_state::device_image_load_scc_cartridge, this)); + + SOFTWARE_LIST(config, "cart_list").set_original("fidel_scc"); +} + + + +/****************************************************************************** + ROM Definitions +******************************************************************************/ + +ROM_START( feleg ) // model AS12(or 6085) + ROM_REGION( 0x10000, "mainmap", 0 ) + ROM_LOAD("feleg.1", 0x8000, 0x2000, CRC(e9df31e8) SHA1(31c52bb8f75580c82093eb950959c1bc294189a8) ) // TMM2764, no label + ROM_LOAD("feleg.2", 0xc000, 0x2000, CRC(bed9c84b) SHA1(c12f39765b054d2ad81f747e698715ad4246806d) ) // " + ROM_LOAD("feleg.3", 0xe000, 0x2000, CRC(b1fb49aa) SHA1(d8c9687dd564f0fa603e6d684effb1d113ac64b4) ) // " +ROM_END + +} // anonymous namespace + + + +/****************************************************************************** + Drivers +******************************************************************************/ + +// YEAR NAME PARENT CMP MACHINE INPUT STATE INIT COMPANY, FULLNAME, FLAGS +CONS( 1985, feleg, 0, 0, as12, as12, as12_state, empty_init, "Fidelity Electronics", "Elegance Chess Challenger", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS | MACHINE_IMPERFECT_TIMING ) |