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delta1: use pwm_display_device (nw)
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@ -3,10 +3,9 @@
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// thanks-to:Berger
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/******************************************************************************
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* novag_delta1.cpp, subdriver of machine/novagbase.cpp, machine/chessbase.cpp
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Novag Delta-1, the chess engine seems similar to Boris (see aci_boris.cpp)
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Hardware notes:
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- 3850PK CPU at ~2MHz, 3853PK memory interface
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- 4KB ROM(2332A), 256 bytes RAM(2*2111A-4)
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- 4-digit 7seg panel, no sound, no chessboard
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@ -14,10 +13,10 @@ Novag Delta-1, the chess engine seems similar to Boris (see aci_boris.cpp)
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******************************************************************************/
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#include "emu.h"
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#include "includes/novagbase.h"
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#include "cpu/f8/f8.h"
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#include "machine/f3853.h"
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#include "machine/timer.h"
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#include "video/pwm.h"
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// internal artwork
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#include "novag_delta1.lh" // clickable
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@ -25,13 +24,19 @@ Novag Delta-1, the chess engine seems similar to Boris (see aci_boris.cpp)
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namespace {
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class delta1_state : public novagbase_state
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class delta1_state : public driver_device
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{
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public:
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delta1_state(const machine_config &mconfig, device_type type, const char *tag) :
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novagbase_state(mconfig, type, tag)
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driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_display(*this, "display"),
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m_inputs(*this, "IN.%u", 0)
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{ }
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// New Game button is directly tied to F3850 EXT RES pin
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DECLARE_INPUT_CHANGED_MEMBER(reset_button) { m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); }
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// machine drivers
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void delta1(machine_config &config);
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@ -39,25 +44,45 @@ protected:
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virtual void machine_start() override;
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private:
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// devices/pointers
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required_device<cpu_device> m_maincpu;
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required_device<pwm_display_device> m_display;
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required_ioport_array<5> m_inputs;
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// address maps
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void main_map(address_map &map);
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void main_io(address_map &map);
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// I/O handlers
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void update_display();
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DECLARE_WRITE8_MEMBER(mux_w);
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DECLARE_WRITE8_MEMBER(digit_w);
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DECLARE_READ8_MEMBER(input_r);
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TIMER_DEVICE_CALLBACK_MEMBER(blink) { m_blink = !m_blink; }
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u8 m_mux_data;
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u8 m_led_select;
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u8 m_inp_mux;
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u8 m_7seg_data;
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bool m_7seg_rc;
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bool m_blink;
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TIMER_DEVICE_CALLBACK_MEMBER(blink) { m_blink = !m_blink; update_display(); }
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};
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void delta1_state::machine_start()
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{
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novagbase_state::machine_start();
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// zerofill/register for savestates
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// zerofill
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m_mux_data = 0;
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m_led_select = 0;
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m_inp_mux = 0;
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m_7seg_rc = false;
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m_blink = false;
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// register for savestates
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save_item(NAME(m_mux_data));
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save_item(NAME(m_led_select));
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save_item(NAME(m_inp_mux));
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save_item(NAME(m_7seg_rc));
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save_item(NAME(m_blink));
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// game reads from uninitialized RAM while it's thinking
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@ -72,34 +97,44 @@ void delta1_state::machine_start()
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// CPU I/O ports
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void delta1_state::update_display()
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{
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m_display->matrix(m_led_select, (m_blink && m_7seg_rc) ? 0 : m_7seg_data);
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}
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WRITE8_MEMBER(delta1_state::mux_w)
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{
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// IO00-02: MC14028B A-C (D to GND)
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// MC14028B Q3-Q7: input mux
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// MC14028B Q4-Q7: digit select through 75492
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u16 sel = 1 << (~data & 7);
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u8 sel = 1 << (~data & 7);
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m_inp_mux = sel >> 3 & 0x1f;
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m_led_select = sel >> 4;
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update_display();
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// update display here
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set_display_segmask(0xf, 0x7f);
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display_matrix(7, 4, m_7seg_data, sel >> 4);
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m_led_select = data;
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m_mux_data = data;
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}
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READ8_MEMBER(delta1_state::input_r)
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{
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u8 data = 0;
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// IO04-07: multiplexed inputs
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// IO03: GND
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return read_inputs(5) << 4 | m_led_select | 8;
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for (int i = 0; i < 5; i++)
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if (BIT(m_inp_mux, i))
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data |= m_inputs[i]->read();
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return data << 4 | m_mux_data | 8;
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}
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WRITE8_MEMBER(delta1_state::digit_w)
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{
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// IO17: R/C circuit to segment commons (for automated blinking)
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// IO10-16: digit segments A-G
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data = (data & 0x80 && m_blink) ? 0 : (data & 0x7f);
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m_7seg_data = bitswap<7>(data, 0,1,2,3,4,5,6);
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m_7seg_rc = bool(BIT(data, 7));
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m_7seg_data = bitswap<7>(data,0,1,2,3,4,5,6);
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update_display();
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}
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@ -178,9 +213,12 @@ void delta1_state::delta1(machine_config &config)
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f3853_device &f3853(F3853(config, "f3853", 2000000));
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f3853.int_req_callback().set_inputline("maincpu", F8_INPUT_LINE_INT_REQ);
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TIMER(config, "display_blink").configure_periodic(FUNC(delta1_state::blink), attotime::from_msec(250)); // approximation
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TIMER(config, "display_decay").configure_periodic(FUNC(delta1_state::display_decay_tick), attotime::from_msec(1));
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/* video hardware */
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PWM_DISPLAY(config, m_display).set_size(4, 7);
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m_display->set_segmask(0xf, 0x7f);
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config.set_default_layout(layout_novag_delta1);
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TIMER(config, "display_blink").configure_periodic(FUNC(delta1_state::blink), attotime::from_msec(250)); // approximation
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}
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