// license:BSD-3-Clause // copyright-holders:Sandro Ronco, hap /****************************************************************************** Saitek RISC 2500, Mephisto Montreux The chess engine (The King) is also compatible with Tasc's The ChessMachine software. The hardware+software appears to have been subcontracted to Tasc. It has similarities with Tasc R30. To make sure it continues the game at next power-on, press the OFF button before exiting MAME. If nvram is broken somehow, boot with the BACK button held down. Hardware notes: - PCB label: TASC23C - ARM2 CPU(VY86C010) @ 14.16MHz - 128KB ROM, 128KB RAM* - SED1520, custom LCD screen - 8*8 chessboard buttons, 16 leds, piezo *: Sold with 128KB RAM by default. This can be easily increased up to 2MB by the user(chesscomputer owner, but also the MAME user in this case). The manual also says that RAM is expandable. According to Saitek's repair manual, there is a GAL and a clock frequency divider chip, ROM access goes through it. This allows reading from slow EPROM while the chess engine resides in faster RAM. The piezo output routine is also in ROM, it would be way too high-pitched at full speed. Undocumented buttons: - hold LEFT+RIGHT on boot to start the QC TestMode - hold UP+DOWN on boot to start the TestMode TODO: - bootrom disable timer shouldn't be needed, real ARM has already fetched the next opcode - More accurate dynamic cpu clock divider, without the cost of emulation speed. The current implementation catches almost everything, luckily ARM opcodes have a fixed length. It only fails to detect ALU opcodes that directly modify pc(R15). It also possibly has problems with very short subroutine calls from ROM to RAM, but I tested for those and the shortest one is more than 50 cycles. ******************************************************************************/ #include "emu.h" #include "cpu/arm/arm.h" #include "machine/nvram.h" #include "machine/ram.h" #include "machine/sensorboard.h" #include "machine/timer.h" #include "sound/spkrdev.h" #include "video/sed1520.h" #include "emupal.h" #include "screen.h" #include "speaker.h" // internal artwork #include "mephisto_montreux.lh" #include "saitek_risc2500.lh" namespace { class risc2500_state : public driver_device { public: risc2500_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_rom(*this, "maincpu") , m_ram(*this, "ram") , m_nvram(*this, "nvram") , m_disable_bootrom(*this, "disable_bootrom") , m_speaker(*this, "speaker") , m_lcdc(*this, "lcdc") , m_board(*this, "board") , m_inputs(*this, "IN.%u", 0) , m_digits(*this, "digit%u", 0U) , m_syms(*this, "sym%u", 0U) , m_leds(*this, "led%u", 0U) { } DECLARE_INPUT_CHANGED_MEMBER(acl_button) { if (newval) power_off(); } DECLARE_INPUT_CHANGED_MEMBER(on_button); void risc2500(machine_config &config); void montreux(machine_config &config); protected: virtual void machine_start() override; virtual void machine_reset() override; virtual void device_post_load() override { install_bootrom(m_bootrom_enabled); } private: required_device m_maincpu; required_region_ptr m_rom; required_device m_ram; required_device m_nvram; required_device m_disable_bootrom; required_device m_speaker; required_device m_lcdc; required_device m_board; required_ioport_array<8> m_inputs; output_finder<12> m_digits; output_finder<14> m_syms; output_finder<16> m_leds; void risc2500_mem(address_map &map); void lcd_palette(palette_device &palette) const; SED1520_UPDATE_CB(screen_update_cb); u32 input_r(); void control_w(u32 data); u32 rom_r(offs_t offset); void power_off(); u32 disable_boot_rom_r(); void install_bootrom(bool enable); TIMER_DEVICE_CALLBACK_MEMBER(disable_bootrom) { install_bootrom(false); } bool m_bootrom_enabled = false; bool m_power = false; u32 m_control = 0; u32 m_prev_pc = 0; u64 m_prev_cycle = 0; }; void risc2500_state::machine_start() { m_digits.resolve(); m_syms.resolve(); m_leds.resolve(); m_nvram->set_base(m_ram->pointer(), m_ram->size()); // register for savestates save_item(NAME(m_power)); save_item(NAME(m_bootrom_enabled)); save_item(NAME(m_control)); save_item(NAME(m_prev_pc)); save_item(NAME(m_prev_cycle)); } void risc2500_state::machine_reset() { install_bootrom(true); m_power = true; m_control = 0; m_prev_pc = m_maincpu->pc(); m_prev_cycle = m_maincpu->total_cycles(); } /****************************************************************************** Video ******************************************************************************/ void risc2500_state::lcd_palette(palette_device &palette) const { palette.set_pen_color(0, rgb_t(131, 136, 139)); // lcd pixel off palette.set_pen_color(1, rgb_t(51, 42, 43)); // lcd pixel on palette.set_pen_color(2, rgb_t(138, 146, 148)); // background } SED1520_UPDATE_CB(risc2500_state::screen_update_cb) { bitmap.fill(2, cliprect); for (int c = 0; c < 12; c++) { // 12 characters 5 x 7 for (int x = 0; x < 5; x++) { u8 gfx = 0; if (lcd_on) gfx = bitswap<8>(dram[c * 5 + x], 6,5,0,1,2,3,4,7); for (int y = 1; y < 8; y++) bitmap.pix(y, 71 - (c * 6 + x)) = BIT(gfx, y); } // LCD digits and symbols if (lcd_on) { int data_addr = 80 + c * 5; u16 data = ((dram[data_addr + 1] & 0x3) << 5) | ((dram[data_addr + 2] & 0x7) << 2) | (dram[data_addr + 4] & 0x3); data = bitswap<8>(data, 7,3,0,1,4,6,5,2) | ((dram[data_addr - 1] & 0x04) ? 0x80 : 0); m_digits[c] = data; m_syms[c] = BIT(dram[data_addr + 1], 2); } else { m_digits[c] = 0; m_syms[c] = 0; } } m_syms[12] = lcd_on ? BIT(dram[0x73], 0) : 0; m_syms[13] = lcd_on ? BIT(dram[0x5a], 0) : 0; return 0; } /****************************************************************************** I/O ******************************************************************************/ // bootrom bankswitch void risc2500_state::install_bootrom(bool enable) { address_space &program = m_maincpu->space(AS_PROGRAM); program.unmap_readwrite(0, std::max(m_rom.bytes(), size_t(m_ram->size())) - 1); if (enable) program.install_read_handler(0, m_rom.bytes() - 1, read32sm_delegate(*this, FUNC(risc2500_state::rom_r))); else program.install_ram(0, m_ram->size() - 1, m_ram->pointer()); m_bootrom_enabled = enable; } u32 risc2500_state::disable_boot_rom_r() { // disconnect bootrom from the bus after next opcode if (m_bootrom_enabled && !m_disable_bootrom->enabled() && !machine().side_effects_disabled()) m_disable_bootrom->adjust(m_maincpu->cycles_to_attotime(10)); return 0; } // soft power on/off INPUT_CHANGED_MEMBER(risc2500_state::on_button) { if (newval && !m_power) { m_maincpu->set_input_line(INPUT_LINE_RESET, CLEAR_LINE); machine_reset(); } } void risc2500_state::power_off() { m_power = false; m_maincpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE); // clear display m_lcdc->reset(); for (int i = 0; i < 16; i++) m_leds[i] = 0; } // main I/O u32 risc2500_state::input_r() { u32 data = (u32)m_lcdc->status_read() << 16; for (int i = 0; i < 8; i++) { if (m_control & (1 << i)) { data |= m_inputs[i]->read() << 24; data |= m_board->read_rank(i, true); } } if (!machine().side_effects_disabled()) m_maincpu->set_input_line(ARM_FIRQ_LINE, CLEAR_LINE); return data; } void risc2500_state::control_w(u32 data) { // lcd if (!BIT(data, 27)) { if (BIT(data, 26)) m_lcdc->data_write(data); else m_lcdc->control_write(data); } // vertical leds if (BIT(data, 31)) { for (int i = 0; i < 8; i++) m_leds[i] = BIT(~data, i); } // horizontal leds if (BIT(data, 30)) { for (int i = 0; i < 8; i++) m_leds[8 + i] = BIT(~data, i); } // speaker m_speaker->level_w(data >> 28 & 3); // power-off if (BIT(m_control & ~data, 24)) power_off(); m_control = data; } u32 risc2500_state::rom_r(offs_t offset) { if (!machine().side_effects_disabled()) { // handle dynamic cpu clock divider when accessing rom s64 diff = m_maincpu->total_cycles() - m_prev_cycle; u32 pc = m_maincpu->pc(); if (diff > 0) { static constexpr int arm_branch_cycles = 3; static constexpr int arm_max_cycles = 17; // datablock transfer static constexpr int divider = -8 + 1; // this takes care of almost all cases, otherwise, total cycles taken can't be determined if (diff <= arm_branch_cycles || (diff <= arm_max_cycles && (pc - m_prev_pc) == 4 && (pc & ~0x02000000) == (offset * 4))) m_maincpu->adjust_icount(divider * (int)diff); else m_maincpu->adjust_icount(divider); } m_prev_cycle = m_maincpu->total_cycles(); m_prev_pc = pc; } return m_rom[offset]; } /****************************************************************************** Address Maps ******************************************************************************/ void risc2500_state::risc2500_mem(address_map &map) { map(0x01800000, 0x01800003).r(FUNC(risc2500_state::disable_boot_rom_r)); map(0x01000000, 0x01000003).rw(FUNC(risc2500_state::input_r), FUNC(risc2500_state::control_w)); map(0x02000000, 0x0203ffff).r(FUNC(risc2500_state::rom_r)); } /****************************************************************************** Input Ports ******************************************************************************/ static INPUT_PORTS_START( risc2500 ) PORT_START("IN.0") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Pawn") PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("BACK") PORT_CODE(KEYCODE_B) PORT_CODE(KEYCODE_BACKSPACE) PORT_START("IN.1") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Knight") PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("ENTER") PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD) PORT_START("IN.2") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Bishop") PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("DOWN") PORT_CODE(KEYCODE_DOWN) PORT_START("IN.3") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Rook") PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("UP") PORT_CODE(KEYCODE_UP) PORT_START("IN.4") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Queen") PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("MENU") PORT_CODE(KEYCODE_M) PORT_START("IN.5") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("King") PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("PLAY") PORT_CODE(KEYCODE_L) PORT_START("IN.6") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("RIGHT") PORT_CODE(KEYCODE_RIGHT) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("NEW GAME") PORT_CODE(KEYCODE_N) PORT_START("IN.7") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("LEFT") PORT_CODE(KEYCODE_LEFT) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("OFF") PORT_CODE(KEYCODE_O) PORT_START("RESET") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("ON") PORT_CODE(KEYCODE_I) PORT_CHANGED_MEMBER(DEVICE_SELF, risc2500_state, on_button, 0) PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("ACL") PORT_CODE(KEYCODE_F1) PORT_CHANGED_MEMBER(DEVICE_SELF, risc2500_state, acl_button, 0) INPUT_PORTS_END static INPUT_PORTS_START( montreux ) // on/off buttons have different labels PORT_INCLUDE( risc2500 ) PORT_MODIFY("IN.7") PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("STOP") PORT_CODE(KEYCODE_S) PORT_MODIFY("RESET") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("GO") PORT_CODE(KEYCODE_G) PORT_CHANGED_MEMBER(DEVICE_SELF, risc2500_state, on_button, 0) INPUT_PORTS_END /****************************************************************************** Machine Configs ******************************************************************************/ void risc2500_state::risc2500(machine_config &config) { /* basic machine hardware */ ARM(config, m_maincpu, 28.322_MHz_XTAL / 2); m_maincpu->set_addrmap(AS_PROGRAM, &risc2500_state::risc2500_mem); m_maincpu->set_copro_type(arm_cpu_device::copro_type::VL86C020); const attotime irq_period = attotime::from_hz(32.768_kHz_XTAL / 128); // 256Hz m_maincpu->set_periodic_int(FUNC(risc2500_state::irq1_line_assert), irq_period); TIMER(config, "disable_bootrom").configure_generic(FUNC(risc2500_state::disable_bootrom)); RAM(config, m_ram).set_extra_options("128K, 256K, 512K, 1M, 2M"); m_ram->set_default_size("128K"); m_ram->set_default_value(0); NVRAM(config, "nvram", nvram_device::DEFAULT_NONE); SENSORBOARD(config, m_board); m_board->set_type(sensorboard_device::BUTTONS); m_board->init_cb().set(m_board, FUNC(sensorboard_device::preset_chess)); m_board->set_delay(attotime::from_msec(100)); m_board->set_nvram_enable(true); /* video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_LCD)); screen.set_refresh_hz(60); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ screen.set_size(12*6+1, 7+2); screen.set_visarea_full(); screen.set_screen_update(m_lcdc, FUNC(sed1520_device::screen_update)); screen.set_palette("palette"); config.set_default_layout(layout_saitek_risc2500); PALETTE(config, "palette", FUNC(risc2500_state::lcd_palette), 3); SED1520(config, m_lcdc); m_lcdc->set_screen_update_cb(FUNC(risc2500_state::screen_update_cb)); /* sound hardware */ SPEAKER(config, "mono").front_center(); static const double speaker_levels[4] = { 0.0, 1.0, -1.0, 0.0 }; SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25); m_speaker->set_levels(4, speaker_levels); } void risc2500_state::montreux(machine_config &config) { risc2500(config); config.set_default_layout(layout_mephisto_montreux); } /****************************************************************************** ROM Definitions ******************************************************************************/ ROM_START( risc2500 ) ROM_REGION( 0x40000, "maincpu", ROMREGION_ERASE00 ) ROM_LOAD("risc2500_v.1.04.u7", 0x000000, 0x020000, CRC(84a06178) SHA1(66f4d9f53de6da865a3ebb4af1d6a3e245c59a3c) ) // M27C1001 ROM_END ROM_START( risc2500a ) ROM_REGION( 0x40000, "maincpu", ROMREGION_ERASE00 ) ROM_LOAD("risc2500_v.1.03.u7", 0x000000, 0x020000, CRC(7a707e82) SHA1(87187fa58117a442f3abd30092cfcc2a4d7c7efc) ) ROM_END ROM_START( montreux ) // v1.00 ROM_REGION( 0x40000, "maincpu", 0 ) ROM_LOAD("rt17b_103_u_7.u7", 0x000000, 0x040000, CRC(db374cf3) SHA1(44dd60d56779084326c3dfb41d2137ebf0b4e0ac) ) // 27C020-15 ROM_END } // anonymous namespace /****************************************************************************** Drivers ******************************************************************************/ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS CONS( 1992, risc2500, 0, 0, risc2500, risc2500, risc2500_state, empty_init, "Saitek / Tasc", "Kasparov RISC 2500 (v1.04)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_TIMING | MACHINE_CLICKABLE_ARTWORK ) CONS( 1992, risc2500a, risc2500, 0, risc2500, risc2500, risc2500_state, empty_init, "Saitek / Tasc", "Kasparov RISC 2500 (v1.03)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_TIMING | MACHINE_CLICKABLE_ARTWORK ) CONS( 1995, montreux, 0, 0, montreux, montreux, risc2500_state, empty_init, "Saitek / Tasc", "Mephisto Montreux", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_TIMING | MACHINE_CLICKABLE_ARTWORK ) // after Saitek bought Hegener + Glaser