// license:BSD-3-Clause
// copyright-holders:hap
// thanks-to:Sean Riddle
/******************************************************************************
Milton Bradley Milton
This is the talking tabletop game, not the chess computer with the same name.
Game 1: Match beginning of a phrase(red button) with end of phrase(yellow button).
Game 2: Same as game 1, but all in one turn.
Game 3: Press phrase end buttons, memorize them, press Go and match them.
Hardware is an odd combination: MC6805P2 MCU, GI SP0250 speech + 2*TMC0430 GROM.
See patent 4326710 for detailed information, except MC6805 clocked from SP0250 3.12MHz
and GROM clocked by 3.12MHz/8=390kHz.
******************************************************************************/
#include "emu.h"
#include "cpu/m6805/m68705.h"
#include "machine/clock.h"
#include "machine/tmc0430.h"
#include "sound/sp0250.h"
#include "speaker.h"
// internal artwork
#include "milton.lh" // clickable
class milton_filter_device;
class milton_state : public driver_device
{
public:
milton_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_grom(*this, "grom%u", 0),
m_speech(*this, "sp0250"),
m_filter(*this, "filter"),
m_inputs(*this, "IN.%u", 0)
{ }
void milton(machine_config &config);
DECLARE_INPUT_CHANGED_MEMBER(volume_changed);
protected:
virtual void machine_start() override;
private:
required_device<m6805_hmos_device> m_maincpu;
required_device_array<tmc0430_device, 2> m_grom;
required_device<sp0250_device> m_speech;
required_device<milton_filter_device> m_filter;
required_ioport_array<5> m_inputs;
u8 m_data;
u8 m_control;
void data_w(u8 data);
u8 data_r();
void control_w(u8 data);
u8 control_r();
u8 input_r();
};
void milton_state::machine_start()
{
// zerofill
m_data = 0;
m_control = 0xff;
// register for savestates
save_item(NAME(m_data));
save_item(NAME(m_control));
}
/******************************************************************************
LED Filter
******************************************************************************/
class milton_filter_device : public device_t, public device_sound_interface
{
public:
milton_filter_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
protected:
virtual void device_start() override;
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
private:
sound_stream *m_stream;
output_finder<> m_led_out;
};
DEFINE_DEVICE_TYPE(MILTON_LED_FILTER, milton_filter_device, "milton_led_filter", "Milton LED Filter")
milton_filter_device::milton_filter_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, MILTON_LED_FILTER, tag, owner, clock),
device_sound_interface(mconfig, *this),
m_led_out(*this, "led")
{ }
void milton_filter_device::device_start()
{
m_stream = stream_alloc(1, 1, machine().sample_rate());
m_led_out.resolve();
}
void milton_filter_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
int level = 0;
for (int i = 0; i < samples; i++)
{
level += abs(inputs[0][i]);
outputs[0][i] = inputs[0][i];
}
if (samples > 0)
level /= samples;
// 2 leds connected to the audio circuit
const int threshold = 1500;
m_led_out = (level > threshold) ? 1 : 0;
}
/******************************************************************************
I/O
******************************************************************************/
void milton_state::data_w(u8 data)
{
// TMC0430 + SP0250 data
m_data = data;
}
u8 milton_state::data_r()
{
if (machine().side_effects_disabled())
return 0;
// TMC0430 data
u8 data = 0;
m_grom[0]->readz(&data);
m_grom[1]->readz(&data);
return data;
}
void milton_state::control_w(u8 data)
{
// d0-d4: input mux
// d5: SP0250 data present
if (~m_control & data & 0x20)
m_speech->write(m_data);
// d1: TMC0430 M
// d3: TMC0430 MO
// d7: TMC0430 GS
for (int i = 0; i < 2; i++)
{
m_grom[i]->m_line(BIT(data, 1));
m_grom[i]->mo_line(BIT(data, 3));
m_grom[i]->gsq_line(BIT(~data, 7));
}
// write pending TMC0430 data
if (m_control & ~data & 0x80 && ~data & 2)
{
m_grom[0]->write(m_data);
m_grom[1]->write(m_data);
}
m_control = data;
}
u8 milton_state::control_r()
{
if (machine().side_effects_disabled())
return 0;
// d6: SP0250 data request
// other: no function (DDRB = 0xbf)
return m_speech->drq_r() ? 0x40 : 0;
}
u8 milton_state::input_r()
{
u8 data = 0;
// d0-d3: multiplexed inputs
for (int i = 0; i < 5; i++)
if (BIT(~m_control, i))
data |= m_inputs[i]->read();
return ~data;
}
/******************************************************************************
Input Ports
******************************************************************************/
static INPUT_PORTS_START( milton )
PORT_START("IN.0")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_U) PORT_NAME("Red Button 7")
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Y) PORT_NAME("Red Button 6")
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Red Button 5")
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("Red Button 4")
PORT_START("IN.1")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_NAME("Red Button 3")
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W) PORT_NAME("Red Button 2")
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Q) PORT_NAME("Red Button 1")
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_NAME("Purple Button 1")
PORT_START("IN.2")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_NAME("Purple Button 2")
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_NAME("Purple Button 3")
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Z) PORT_NAME("Go")
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_X) PORT_NAME("Score")
PORT_START("IN.3")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_C) PORT_NAME("Reset")
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_A) PORT_NAME("Yellow Button 1") // starting at top, then clockwise
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_S) PORT_NAME("Yellow Button 2")
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_D) PORT_NAME("Yellow Button 3")
PORT_START("IN.4")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_F) PORT_NAME("Yellow Button 4")
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_G) PORT_NAME("Yellow Button 5")
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_H) PORT_NAME("Yellow Button 6")
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_J) PORT_NAME("Yellow Button 7")
PORT_START("VOLUME")
PORT_CONFNAME( 0x01, 0x00, "Volume" ) PORT_CHANGED_MEMBER(DEVICE_SELF, milton_state, volume_changed, 0)
PORT_CONFSETTING( 0x01, "Low" )
PORT_CONFSETTING( 0x00, "High" )
INPUT_PORTS_END
INPUT_CHANGED_MEMBER(milton_state::volume_changed)
{
m_filter->set_output_gain(0, newval ? 0.25 : 1.0);
}
/******************************************************************************
Machine Configs
******************************************************************************/
void milton_state::milton(machine_config &config)
{
/* basic machine hardware */
M6805P2(config, m_maincpu, 3.12_MHz_XTAL);
m_maincpu->porta_w().set(FUNC(milton_state::data_w));
m_maincpu->porta_r().set(FUNC(milton_state::data_r));
m_maincpu->portb_w().set(FUNC(milton_state::control_w));
m_maincpu->portb_r().set(FUNC(milton_state::control_r));
m_maincpu->portc_r().set(FUNC(milton_state::input_r));
TMC0430(config, m_grom[0], "groms", 0x0000, 0);
TMC0430(config, m_grom[1], "groms", 0x2000, 1);
clock_device &gromclock(CLOCK(config, "gromclock", 3.12_MHz_XTAL/8));
gromclock.signal_handler().set(m_grom[0], FUNC(tmc0430_device::gclock_in));
gromclock.signal_handler().append(m_grom[1], FUNC(tmc0430_device::gclock_in));
config.set_default_layout(layout_milton);
/* sound hardware */
SPEAKER(config, "speaker").front_center();
SP0250(config, m_speech, 3.12_MHz_XTAL).add_route(0, m_filter, 1.0, 0);
MILTON_LED_FILTER(config, m_filter).add_route(0, "speaker", 1.0);
}
/******************************************************************************
ROM Definitions
******************************************************************************/
ROM_START( milton )
ROM_REGION( 0x800, "maincpu", 0 )
ROM_LOAD("sc87008p_783-4043-001", 0x000, 0x800, CRC(b054dbea) SHA1(b5339c8170e773b68505c3d60dc75249a583d60a) )
ROM_REGION( 0x4000, "groms", ROMREGION_ERASE00 )
ROM_LOAD("4043-003", 0x0000, 0x1800, CRC(d95df757) SHA1(6723480866f6393d310e304ef3b61e3a319a7beb) )
ROM_LOAD("4043-004", 0x2000, 0x1800, CRC(9ac929f7) SHA1(1a27d56fc49eb4e58ea3b5c58d7fbedc5a751592) )
ROM_END
/******************************************************************************
Drivers
******************************************************************************/
// YEAR NAME PARENT CMP MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS
CONS( 1980, milton, 0, 0, milton, milton, milton_state, empty_init, "Milton Bradley", "Electronic Milton", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )