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Diffstat (limited to 'src/mame/drivers/aci_boris.cpp')
-rw-r--r-- | src/mame/drivers/aci_boris.cpp | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/src/mame/drivers/aci_boris.cpp b/src/mame/drivers/aci_boris.cpp new file mode 100644 index 00000000000..55817b69224 --- /dev/null +++ b/src/mame/drivers/aci_boris.cpp @@ -0,0 +1,258 @@ +// license:BSD-3-Clause +// copyright-holders:hap +// thanks-to:Sean Riddle +/****************************************************************************** + +Applied Concepts Boris (electronic chess computer) + +- MK3850N-3 CPU @ 2 MHz, MK3853N memory interface +- 256 bytes RAM(2*2112), AMI 2KB ROM + AMI 1KB(?*) ROM *: less than 512 bytes used +- 8-digit 16seg led panel + +When it was first released, it was in kit form. An extensive assembly manual with +schematics was included. It was later distributed by Chafitz in pre-assembled form. +There's also an updated revision, identifiable by the startup message "Boris awaits +your move"(same as Boris Master) instead of "Boris plays black". + +******************************************************************************/ + +#include "emu.h" +#include "cpu/f8/f8.h" +#include "machine/f3853.h" +#include "machine/timer.h" + +// internal artwork +#include "aci_boris.lh" // clickable + + +namespace { + +class boris_state : public driver_device +{ +public: + boris_state(const machine_config &mconfig, device_type type, const char *tag) : + driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_inp_matrix(*this, "IN.%u", 0), + m_delay_display(*this, "delay_display_%u", 0), + m_out_digit(*this, "digit%u", 0U) + { } + + void boris(machine_config &config); + + DECLARE_INPUT_CHANGED_MEMBER(reset_switch); + +protected: + virtual void machine_start() override; + +private: + // devices/pointers + required_device<cpu_device> m_maincpu; + required_ioport_array<4> m_inp_matrix; + required_device_array<timer_device, 8> m_delay_display; + output_finder<8> m_out_digit; + + void main_map(address_map &map); + void main_io(address_map &map); + + TIMER_DEVICE_CALLBACK_MEMBER(delay_display); + + DECLARE_WRITE8_MEMBER(mux_w); + DECLARE_WRITE8_MEMBER(digit_w); + DECLARE_READ8_MEMBER(input_r); + + void update_4042(); + + u8 m_io[2]; // MK3850 I/O ports + u8 m_4042; // 4042 latch output +}; + +void boris_state::machine_start() +{ + // resolve handlers + m_out_digit.resolve(); + + // zerofill + memset(m_io, 0, sizeof(m_io)); + m_4042 = 0; + + // register for savestates + save_item(NAME(m_io)); + save_item(NAME(m_4042)); +} + +INPUT_CHANGED_MEMBER(boris_state::reset_switch) +{ + // reset switch is tied to MK3850 RESET pin + m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); + + // clear display + if (newval) + { + for (int i = 0; i < 8; i++) + m_delay_display[i]->adjust(attotime::zero, i); + } +} + + + +/****************************************************************************** + Devices, I/O +******************************************************************************/ + +// MK3850 ports/TTL + +TIMER_DEVICE_CALLBACK_MEMBER(boris_state::delay_display) +{ + // 16 segments via port 1 and 4042 output (latched port 1) + u16 mask = (param & 8) ? 0xffff : 0; + m_out_digit[param & 7] = ~(m_4042 << 8 | m_io[1]) & mask; +} + +void boris_state::update_4042() +{ + // port 1 is latched as long as 4042 clock is low + // (yes low, this is actually (~~m_io[0] & 8) since output ports are inverted) + if (m_io[0] & 8) + m_4042 = bitswap<8>(m_io[1],4,2,0,6,5,1,3,7); +} + +WRITE8_MEMBER(boris_state::mux_w) +{ + // IO00-IO02: 4028 A-C to digit/input mux (4028 D to GND) + u8 prev = ~m_io[0] & 7; + u8 sel = ~data & 7; + if (sel != prev) + { + // digits are strobed, so on falling edge, delay them going off to prevent flicker or stuck display + m_delay_display[prev]->adjust(attotime::from_msec(50), prev); + + // need a short delay on rising edge too, while boris sets up digit segments + // (it writes port 1, increments digit, latches port 1, writes port 1 again) + m_delay_display[sel]->adjust(attotime::from_usec(50), sel | 8); + } + + // IO03: clock 4042 + m_io[0] = data; + update_4042(); +} + +READ8_MEMBER(boris_state::input_r) +{ + // IO04-IO07: multiplexed inputs from 4028 4-7 + u8 data = m_io[0]; + u8 sel = ~data & 7; + if (sel >= 4) + data |= m_inp_matrix[sel-4]->read() << 4; + + return data; +} + +WRITE8_MEMBER(boris_state::digit_w) +{ + // IO10-IO17: digit segments + m_io[1] = data; + update_4042(); +} + + + +/****************************************************************************** + Address Maps +******************************************************************************/ + +void boris_state::main_map(address_map &map) +{ + map.global_mask(0x0fff); + map(0x0000, 0x0bff).rom(); + map(0x0c00, 0x0fff).ram(); +} + +void boris_state::main_io(address_map &map) +{ + map(0x00, 0x00).rw(FUNC(boris_state::input_r), FUNC(boris_state::mux_w)); + map(0x01, 0x01).w(FUNC(boris_state::digit_w)); + map(0x0c, 0x0f).rw("smi", FUNC(f3853_device::read), FUNC(f3853_device::write)); +} + + + +/****************************************************************************** + Input Ports +******************************************************************************/ + +static INPUT_PORTS_START( boris ) + PORT_START("IN.0") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_NAME("G.7") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_H) PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_NAME("H.8") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_S) PORT_CODE(KEYCODE_9) PORT_CODE(KEYCODE_9_PAD) PORT_NAME("Set / 9") // labeled just "SET" on 1st version + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_DEL) PORT_CODE(KEYCODE_BACKSPACE) PORT_NAME("CE") // clear entry + + PORT_START("IN.1") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_D) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("D.4 / Rook") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("E.5 / Queen") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_F) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("F.6 / King") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Time") + + PORT_START("IN.2") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_A) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("A.1 / Pawn") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_B) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("B.2 / Knight") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_C) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("C.3 / Bishop") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_K) PORT_NAME("Rank") + + PORT_START("IN.3") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_0) PORT_CODE(KEYCODE_0_PAD) PORT_NAME("0") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_SPACE) PORT_CODE(KEYCODE_MINUS) PORT_NAME("-") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W) PORT_NAME("B/W") // black/white + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD) PORT_NAME("Enter") + + PORT_START("RESET") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_CODE(KEYCODE_R) PORT_TOGGLE PORT_CHANGED_MEMBER(DEVICE_SELF, boris_state, reset_switch, nullptr) PORT_NAME("Reset Switch") +INPUT_PORTS_END + + + +/****************************************************************************** + Machine Configs +******************************************************************************/ + +void boris_state::boris(machine_config &config) +{ + /* basic machine hardware */ + F8(config, m_maincpu, 2_MHz_XTAL); // MK3850, 2MHz XTAL according to schematics + m_maincpu->set_addrmap(AS_PROGRAM, &boris_state::main_map); + m_maincpu->set_addrmap(AS_IO, &boris_state::main_io); + m_maincpu->set_irq_acknowledge_callback("smi", FUNC(f3853_device::int_acknowledge)); + + f3853_device &smi(F3853(config, "smi", 2_MHz_XTAL)); + smi.int_req_callback().set_inputline("maincpu", F8_INPUT_LINE_INT_REQ); + + /* video hardware */ + for (int i = 0; i < 8; i++) + TIMER(config, m_delay_display[i]).configure_generic(FUNC(boris_state::delay_display)); + + config.set_default_layout(layout_aci_boris); +} + + + +/****************************************************************************** + ROM Definitions +******************************************************************************/ + +ROM_START( boris ) + ROM_REGION( 0x1000, "maincpu", 0 ) + ROM_LOAD("007-7020-00_c10502", 0x0000, 0x0800, CRC(18182870) SHA1(cb717a4b5269b04b0d7ae61aaf4a8f6a019626a5) ) + ROM_LOAD("007-7021-00_c10503", 0x0800, 0x0400, CRC(49b77505) SHA1(474b665ee2955497f6d70878d817f1783ba1a835) ) +ROM_END + +} // anonymous namespace + + + +/****************************************************************************** + Drivers +******************************************************************************/ + +// YEAR NAME PARENT CMP MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS +COMP( 1978, boris, 0, 0, boris, boris, boris_state, empty_init, "Applied Concepts", "Boris", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND_HW | MACHINE_CLICKABLE_ARTWORK ) |