// license:BSD-3-Clause // copyright-holders:Sandro Ronco, hap /*************************************************************************** Schachcomputer SC 2 (G-5002.500) 2nd chess computer by VEB(Volkseigener Betrieb) Funkwerk Erfurt. The company was renamed to VEB Mikroelektronik "Karl Marx" Erfurt in 1983, and formed into X-FAB Semiconductor Foundries AG after the German unification. SC 2 chess program is an unlicensed copy of Fidelity Chess Challenger 10 C, with some patches and an extra 1KB ROM to deal with the different I/O. 3 versions known: initial version, revision E, revision EP. Schachcomputer SC 1 was canceled before wide release, it's assumed to be on similar hardware, but PCB photos show 10 ROM chips instead of 9. keypad legend: R - Rückstellen (reset) K - Programmstufen (level) W - Figurenwahl (white/black) P - Problemeingabe (problem mode) T - Tonabschaltung (sound on/off) L - Löschen (clear) Q - Quittierung (enter) Fidelity CC10 synonyms: RE, LV, RV, PB, ♪, CL, EN ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/z80pio.h" #include "sound/dac.h" #include "video/pwm.h" #include "speaker.h" // internal artwork #include "sc2.lh" namespace { class sc2_state : public driver_device { public: sc2_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_pio(*this, "z80pio"), m_display(*this, "display"), m_dac(*this, "dac"), m_inputs(*this, "IN.%u", 0) { } void sc2(machine_config &config); // Rückstellen is also tied to CPU RESET DECLARE_INPUT_CHANGED_MEMBER(reset_button) { m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); } protected: virtual void machine_start() override; private: required_device m_maincpu; required_device m_pio; required_device m_display; required_device m_dac; required_ioport_array<4> m_inputs; void main_io(address_map &map); void main_map(address_map &map); u8 m_inp_mux = 0; u8 m_digit_data = 0; void update_display(); u8 pio_port_b_r(); void pio_port_a_w(u8 data); void pio_port_b_w(u8 data); u8 speaker_r(offs_t offset); }; void sc2_state::machine_start() { // register for savestates save_item(NAME(m_inp_mux)); save_item(NAME(m_digit_data)); } /****************************************************************************** I/O ******************************************************************************/ void sc2_state::update_display() { m_display->matrix(~m_inp_mux, m_digit_data); } u8 sc2_state::pio_port_b_r() { u8 data = 0; // read keypad for (int i = 0; i < 4; i++) if (BIT(m_inp_mux, i)) data |= m_inputs[i]->read(); return data << 4 | 0xf; } void sc2_state::pio_port_a_w(u8 data) { // digit segment data m_digit_data = bitswap<8>(data,7,0,1,2,3,4,5,6); update_display(); } void sc2_state::pio_port_b_w(u8 data) { // d0-d3: keypad mux(active high), led mux(active low) m_inp_mux = data; update_display(); } u8 sc2_state::speaker_r(offs_t offset) { if (!machine().side_effects_disabled()) m_dac->write(BIT(~offset, 11)); return 0xff; } /****************************************************************************** Address Maps ******************************************************************************/ void sc2_state::main_map(address_map &map) { map(0x0000, 0x0fff).rom(); map(0x1000, 0x13ff).ram(); map(0x2000, 0x33ff).rom(); map(0x3400, 0x3400).select(0x800).r(FUNC(sc2_state::speaker_r)); } void sc2_state::main_io(address_map &map) { map.global_mask(0x03); map(0x00, 0x03).rw(m_pio, FUNC(z80pio_device::read), FUNC(z80pio_device::write)); } /****************************************************************************** Input Ports ******************************************************************************/ static INPUT_PORTS_START( sc2 ) PORT_START("IN.0") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_UNUSED) PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CODE(KEYCODE_DEL) PORT_CODE(KEYCODE_BACKSPACE) PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD) PORT_START("IN.1") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("A 1") PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_CODE(KEYCODE_A) PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("B 2") PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_CODE(KEYCODE_B) PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("C 3") PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_CODE(KEYCODE_C) PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("D 4") PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_CODE(KEYCODE_D) PORT_START("IN.2") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("E 5") PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_CODE(KEYCODE_E) PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("F 6") PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_CODE(KEYCODE_F) PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("G 7") PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_CODE(KEYCODE_G) PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("H 8") PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_CODE(KEYCODE_H) PORT_START("IN.3") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHANGED_MEMBER(DEVICE_SELF, sc2_state, reset_button, 0) PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("P") PORT_CODE(KEYCODE_O) INPUT_PORTS_END /****************************************************************************** Machine Configs ******************************************************************************/ void sc2_state::sc2(machine_config &config) { /* basic machine hardware */ Z80(config, m_maincpu, 9.8304_MHz_XTAL/4); // U880 Z80 clone m_maincpu->set_addrmap(AS_PROGRAM, &sc2_state::main_map); m_maincpu->set_addrmap(AS_IO, &sc2_state::main_io); Z80PIO(config, m_pio, 9.8304_MHz_XTAL/4); m_pio->out_pa_callback().set(FUNC(sc2_state::pio_port_a_w)); m_pio->in_pb_callback().set(FUNC(sc2_state::pio_port_b_r)); m_pio->out_pb_callback().set(FUNC(sc2_state::pio_port_b_w)); /* video hardware */ PWM_DISPLAY(config, m_display).set_size(4, 8); m_display->set_segmask(0xf, 0x7f); config.set_default_layout(layout_sc2); /* sound hardware */ SPEAKER(config, "speaker").front_center(); DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25); } /****************************************************************************** ROM Definitions ******************************************************************************/ ROM_START( sc2 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "bm008.bin", 0x0000, 0x0400, CRC(3023ea82) SHA1(07020d153d802c672c39e1af3c716dbe35e23f08) ) ROM_LOAD( "bm009.bin", 0x0400, 0x0400, CRC(6a34814e) SHA1(e58ae6615297b028db135a48a8f9e186a4220f4f) ) ROM_LOAD( "bm010.bin", 0x0800, 0x0400, CRC(deab0373) SHA1(81c9a7197eef8d9131e47ecd2ec35b943caee54e) ) ROM_LOAD( "bm011.bin", 0x0c00, 0x0400, CRC(c8282339) SHA1(8d6b8861281e967a77609b6d77e80afd47d28ed2) ) ROM_LOAD( "bm012.bin", 0x2000, 0x0400, CRC(2e6a4294) SHA1(7b9bd191c9ec73139a65c3a339ab88e1f3eb5ed2) ) ROM_LOAD( "bm013.bin", 0x2400, 0x0400, CRC(3e02eb42) SHA1(2e4a9a8fd04c202c9518550d7e8cf9bfea394153) ) ROM_LOAD( "bm014.bin", 0x2800, 0x0400, CRC(538d449e) SHA1(c4186995b69e97740e01eaff84a20d49d03d180f) ) ROM_LOAD( "bm015.bin", 0x2c00, 0x0400, CRC(b4991dca) SHA1(6a6cdddf5c4afa24773acf693f58c34b99c8d328) ) ROM_LOAD( "bm037.bin", 0x3000, 0x0400, CRC(2b67faf1) SHA1(5c65734acaeb766240dbd492a774c56fcfc382f7) ) ROM_END ROM_START( sc2a ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "bm008.bin", 0x0000, 0x0400, CRC(3023ea82) SHA1(07020d153d802c672c39e1af3c716dbe35e23f08) ) ROM_LOAD( "bm009.bin", 0x0400, 0x0400, CRC(6a34814e) SHA1(e58ae6615297b028db135a48a8f9e186a4220f4f) ) ROM_LOAD( "bm010.bin", 0x0800, 0x0400, CRC(deab0373) SHA1(81c9a7197eef8d9131e47ecd2ec35b943caee54e) ) ROM_LOAD( "bm011.bin", 0x0c00, 0x0400, CRC(c8282339) SHA1(8d6b8861281e967a77609b6d77e80afd47d28ed2) ) ROM_LOAD( "bm012.bin", 0x2000, 0x0400, CRC(2e6a4294) SHA1(7b9bd191c9ec73139a65c3a339ab88e1f3eb5ed2) ) ROM_LOAD( "bm013.bin", 0x2400, 0x0400, CRC(3e02eb42) SHA1(2e4a9a8fd04c202c9518550d7e8cf9bfea394153) ) ROM_LOAD( "bm014.bin", 0x2800, 0x0400, CRC(538d449e) SHA1(c4186995b69e97740e01eaff84a20d49d03d180f) ) ROM_LOAD( "bm015.bin", 0x2c00, 0x0400, CRC(b4991dca) SHA1(6a6cdddf5c4afa24773acf693f58c34b99c8d328) ) ROM_LOAD( "bm016.bin", 0x3000, 0x0400, CRC(4fe0853a) SHA1(c2253e320778b0ea468fb54f26ae83d07f9700e6) ) ROM_END } // anonymous namespace /****************************************************************************** Drivers ******************************************************************************/ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS COMP( 1981, sc2, 0, 0, sc2, sc2, sc2_state, empty_init, "VEB Funkwerk Erfurt", "Schachcomputer SC 2 (rev. E)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK ) COMP( 1981, sc2a, sc2, 0, sc2, sc2, sc2_state, empty_init, "VEB Funkwerk Erfurt", "Schachcomputer SC 2", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )