snova: added inputs and leds

src/mame/drivers/novag_snova.cpp

@@ -9,19 +9,26 @@ Hardware notes:
 - Hitachi HD63A03YP MCU @ 16MHz (4MHz internal)
 - 32KB ROM(TC57256AD-12), 8KB RAM(CXK58648P-10L)
 - LCD with 4 digits and custom segments, no LCD chip
+- RS232 port for Novag Super System (like the one in sexpertc)
 - buzzer, 16 LEDs, 8*8 chessboard buttons
 
 TODO:
-- everything
+- NMI on power-off switch, it sets 0x14 bit 7 for standby power (see below)
-- if it turns out that the hardware is similar enough to supremo, merge drivers?
+- add nvram, MCU is missing standby power emulation
+- add lcd screen
+- internal artwork
+- rs232 port isn't working?
+- unmapped reads from 0x33/0x34
 
 ******************************************************************************/
 
 #include "emu.h"
 
+#include "bus/rs232/rs232.h"
 #include "cpu/m6800/m6801.h"
 #include "machine/sensorboard.h"
 #include "sound/dac.h"
+#include "video/pwm.h"
 
 #include "speaker.h"
 
@@ -35,7 +42,12 @@ public:
 		driver_device(mconfig, type, tag),
 		m_maincpu(*this, "maincpu"),
 		m_board(*this, "board"),
-		m_dac(*this, "dac")
+		m_lcd_pwm(*this, "lcd_pwm"),
+		m_led_pwm(*this, "led_pwm"),
+		m_dac(*this, "dac"),
+		m_rs232(*this, "rs232"),
+		m_inputs(*this, "IN.%u", 0),
+		m_out_lcd(*this, "s%u.%u", 0U, 0U)
 	{ }
 
 	// machine configs
@@ -48,13 +60,38 @@ private:
 	// devices/pointers
 	required_device<hd6303y_cpu_device> m_maincpu;
 	required_device<sensorboard_device> m_board;
+	required_device<pwm_display_device> m_lcd_pwm;
+	required_device<pwm_display_device> m_led_pwm;
 	required_device<dac_bit_interface> m_dac;
+	required_device<rs232_port_device> m_rs232;
+	required_ioport_array<2> m_inputs;
+	output_finder<4, 10> m_out_lcd;
 
 	void main_map(address_map &map);
+
+	void lcd_pwm_w(offs_t offset, u8 data);
+	void update_leds();
+
+	u8 p2_r();
+	void p2_w(u8 data);
+	void p5_w(u8 data);
+	void p6_w(u8 data);
+
+	bool m_lcd_strobe = false;
+	u8 m_inp_mux = 0;
+	u8 m_select = 0;
+	u8 m_led_data = 0;
 };
 
 void snova_state::machine_start()
 {
+	m_out_lcd.resolve();
+
+	// register for savestates
+	save_item(NAME(m_lcd_strobe));
+	save_item(NAME(m_inp_mux));
+	save_item(NAME(m_select));
+	save_item(NAME(m_led_data));
 }
 
 
@@ -63,7 +100,76 @@ void snova_state::machine_start()
     I/O
 ******************************************************************************/
 
-// ...
+// misc
+
+void snova_state::lcd_pwm_w(offs_t offset, u8 data)
+{
+	m_out_lcd[offset & 0x3f][offset >> 6] = data;
+}
+
+void snova_state::update_leds()
+{
+	m_led_pwm->matrix(m_select >> 4 & 3, m_led_data);
+}
+
+
+// MCU ports
+
+u8 snova_state::p2_r()
+{
+	// P20: 4051 Z
+	u8 data = 0;
+
+	// read chessboard buttons
+	for (int i = 0; i < 8; i++)
+		if (BIT(m_led_data, i))
+			data |= BIT(m_board->read_file(i), m_inp_mux);
+
+	// read keypad buttons
+	for (int i = 0; i < 2; i++)
+		if (BIT(m_select, i + 6))
+			data |= BIT(m_inputs[i]->read(), m_inp_mux);
+
+	// P23: serial rx
+	return (data ^ 1) | (m_rs232->rxd_r() << 3);
+}
+
+void snova_state::p2_w(u8 data)
+{
+	// P21: 4066 in/out to LCD
+	if (m_lcd_strobe && ~data & 2)
+	{
+		u16 lcd_data = (m_select << 2 & 0x300) | m_led_data;
+		m_lcd_pwm->matrix(m_select & 0xf, lcd_data);
+	}
+	m_lcd_strobe = bool(data & 2);
+
+	// P22: speaker out
+	m_dac->write(BIT(data, 2));
+
+	// P24: serial tx
+	m_rs232->write_txd(BIT(data, 4));
+
+	// P25-P27: 4051 S1-S2
+	// 4051 Y0-Y7: multiplexed inputs
+	m_inp_mux = data >> 5 & 7;
+}
+
+void snova_state::p5_w(u8 data)
+{
+	// P50-P53: 4066 control to LCD
+	// P54,P55: led select
+	// P56,P57: keypad mux, lcd data
+	m_select = data ^ 0xf0;
+	update_leds();
+}
+
+void snova_state::p6_w(u8 data)
+{
+	// P60-P67: led data, lcd data, chessboard mux
+	m_led_data = ~data;
+	update_leds();
+}
 
 
 
@@ -86,6 +192,25 @@ void snova_state::main_map(address_map &map)
 ******************************************************************************/
 
 static INPUT_PORTS_START( snova )
+	PORT_START("IN.0")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1)
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2)
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) // pawn
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) // knight
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) // bishop
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) // rook
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7) // queen
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8) // king
+
+	PORT_START("IN.1")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Q)
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W)
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E)
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R)
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T)
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Y) // verify
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_U)
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I)
 INPUT_PORTS_END
 
 
@@ -99,14 +224,26 @@ void snova_state::snova(machine_config &config)
 	/* basic machine hardware */
 	HD6303Y(config, m_maincpu, 16_MHz_XTAL);
 	m_maincpu->set_addrmap(AS_PROGRAM, &snova_state::main_map);
+	m_maincpu->in_p2_cb().set(FUNC(snova_state::p2_r));
+	m_maincpu->out_p2_cb().set(FUNC(snova_state::p2_w));
+	m_maincpu->out_p5_cb().set(FUNC(snova_state::p5_w));
+	m_maincpu->out_p6_cb().set(FUNC(snova_state::p6_w));
 
 	SENSORBOARD(config, 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(150));
+	m_board->set_delay(attotime::from_msec(350));
+
+	/* video hardware */
+	PWM_DISPLAY(config, m_lcd_pwm).set_size(4, 10);
+	m_lcd_pwm->output_x().set(FUNC(snova_state::lcd_pwm_w));
+
+	PWM_DISPLAY(config, m_led_pwm).set_size(2, 8);
 
 	/* sound hardware */
 	SPEAKER(config, "speaker").front_center();
 	DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25);
+
+	RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
 }