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Diffstat (limited to 'src/mame/drivers/novag_scon.cpp')
-rw-r--r--src/mame/drivers/novag_scon.cpp195
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diff --git a/src/mame/drivers/novag_scon.cpp b/src/mame/drivers/novag_scon.cpp
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+// license:BSD-3-Clause
+// copyright-holders:hap
+/******************************************************************************
+*
+* novag_scon.cpp, subdriver of machine/novagbase.cpp, machine/chessbase.cpp
+
+TODO:
+- verify IRQ and beeper frequency
+
+*******************************************************************************
+
+Novag Super Constellation Chess Computer (model 844) overview:
+- UMC UM6502C @ 4 MHz (8MHz XTAL), 600Hz? IRQ(source unknown?)
+- 2*2KB RAM TC5516APL-2 battery-backed, 2*32KB ROM custom label
+- TTL, buzzer, 24 LEDs, 8*8 chessboard buttons
+- external ports for clock and printer, not emulated here
+
+******************************************************************************/
+
+#include "emu.h"
+#include "includes/novagbase.h"
+
+#include "cpu/m6502/m6502.h"
+#include "machine/nvram.h"
+#include "speaker.h"
+
+// internal artwork
+#include "novag_supercon.lh" // clickable
+
+
+namespace {
+
+class scon_state : public novagbase_state
+{
+public:
+ scon_state(const machine_config &mconfig, device_type type, const char *tag) :
+ novagbase_state(mconfig, type, tag)
+ { }
+
+ // machine drivers
+ void scon(machine_config &config);
+
+private:
+ // address maps
+ void main_map(address_map &map);
+
+ // I/O handlers
+ DECLARE_WRITE8_MEMBER(mux_w);
+ DECLARE_WRITE8_MEMBER(control_w);
+ DECLARE_READ8_MEMBER(input1_r);
+ DECLARE_READ8_MEMBER(input2_r);
+};
+
+
+/******************************************************************************
+ Devices, I/O
+******************************************************************************/
+
+// TTL
+
+WRITE8_MEMBER(scon_state::mux_w)
+{
+ // d0-d7: input mux, led data
+ m_inp_mux = m_led_data = data;
+ display_matrix(8, 3, m_led_data, m_led_select);
+}
+
+WRITE8_MEMBER(scon_state::control_w)
+{
+ // d0-d3: ?
+ // d4-d6: select led row
+ m_led_select = data >> 4 & 7;
+ display_matrix(8, 3, m_led_data, m_led_select);
+
+ // d7: enable beeper
+ m_beeper->set_state(data >> 7 & 1);
+}
+
+READ8_MEMBER(scon_state::input1_r)
+{
+ // d0-d7: multiplexed inputs (chessboard squares)
+ return ~read_inputs(8) & 0xff;
+}
+
+READ8_MEMBER(scon_state::input2_r)
+{
+ // d0-d5: ?
+ // d6,d7: multiplexed inputs (side panel)
+ return (read_inputs(8) >> 2 & 0xc0) ^ 0xff;
+}
+
+
+
+/******************************************************************************
+ Address Maps
+******************************************************************************/
+
+void scon_state::main_map(address_map &map)
+{
+ map(0x0000, 0x0fff).ram().share("nvram");
+ map(0x1c00, 0x1c00).nopw(); // printer/clock?
+ map(0x1d00, 0x1d00).nopw(); // printer/clock?
+ map(0x1e00, 0x1e00).rw(FUNC(scon_state::input2_r), FUNC(scon_state::mux_w));
+ map(0x1f00, 0x1f00).rw(FUNC(scon_state::input1_r), FUNC(scon_state::control_w));
+ map(0x2000, 0xffff).rom();
+}
+
+
+
+/******************************************************************************
+ Input Ports
+******************************************************************************/
+
+static INPUT_PORTS_START( scon )
+ PORT_INCLUDE( generic_cb_buttons )
+
+ PORT_MODIFY("IN.0")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I) PORT_NAME("New Game")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8) PORT_NAME("Multi Move / Player/Player / King")
+
+ PORT_MODIFY("IN.1")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_U) PORT_NAME("Verify / Set Up")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7) PORT_NAME("Best Move/Random / Training Level / Queen")
+
+ PORT_MODIFY("IN.2")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Y) PORT_NAME("Change Color")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_NAME("Sound / Depth Search / Bishop")
+
+ PORT_MODIFY("IN.3")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Clear Board")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_NAME("Solve Mate / Knight")
+
+ PORT_MODIFY("IN.4")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("Print Moves")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_NAME("Print Board / Rook")
+
+ PORT_MODIFY("IN.5")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_NAME("Form Size")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_NAME("Print List / Acc. Time / Pawn")
+
+ PORT_MODIFY("IN.6")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W) PORT_NAME("Hint")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_NAME("Set Level")
+
+ PORT_MODIFY("IN.7")
+ PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Q) PORT_NAME("Go")
+ PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_NAME("Take Back")
+INPUT_PORTS_END
+
+
+
+/******************************************************************************
+ Machine Drivers
+******************************************************************************/
+
+void scon_state::scon(machine_config &config)
+{
+ /* basic machine hardware */
+ M6502(config, m_maincpu, 8_MHz_XTAL/2); // UM6502C
+ m_maincpu->set_addrmap(AS_PROGRAM, &scon_state::main_map);
+ m_maincpu->set_periodic_int(FUNC(scon_state::irq0_line_hold), attotime::from_hz(600)); // guessed
+
+ NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_1);
+
+ TIMER(config, "display_decay").configure_periodic(FUNC(scon_state::display_decay_tick), attotime::from_msec(1));
+ config.set_default_layout(layout_novag_supercon);
+
+ /* sound hardware */
+ SPEAKER(config, "mono").front_center();
+ BEEP(config, m_beeper, 1024); // guessed
+ m_beeper->add_route(ALL_OUTPUTS, "mono", 0.25);
+}
+
+
+
+/******************************************************************************
+ ROM Definitions
+******************************************************************************/
+
+ROM_START( supercon )
+ ROM_REGION( 0x10000, "maincpu", 0 )
+ ROM_LOAD("novag_8441", 0x0000, 0x8000, CRC(b853cf6e) SHA1(1a759072a5023b92c07f1fac01b7a21f7b5b45d0) ) // label obscured by Q.C. sticker
+ ROM_LOAD("novag_8442", 0x8000, 0x8000, CRC(c8f82331) SHA1(f7fd039f9a3344db9749931490ded9e9e309cfbe) )
+ROM_END
+
+} // anonymous namespace
+
+
+
+/******************************************************************************
+ Drivers
+******************************************************************************/
+
+// YEAR NAME PARENT CMP MACHINE INPUT STATE INIT COMPANY, FULLNAME, FLAGS
+CONS( 1984, supercon, 0, 0, scon, scon, scon_state, empty_init, "Novag", "Super Constellation", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS )