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// license:BSD-3-Clause
// copyright-holders:hap, Kevin Horton
/***************************************************************************
Mitsubishi MELPS 4 MCU tabletops/handhelds or other simple devices,
most of them are VFD electronic games/toys.
***************************************************************************/
#include "emu.h"
#include "cpu/melps4/m58846.h"
#include "sound/speaker.h"
#include "hh_melps4_test.lh" // common test-layout - use external artwork
class hh_melps4_state : public driver_device
{
public:
hh_melps4_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_inp_matrix(*this, "IN"),
m_speaker(*this, "speaker"),
m_display_wait(33),
m_display_maxy(1),
m_display_maxx(0)
{ }
// devices
required_device<cpu_device> m_maincpu;
optional_ioport_array<2> m_inp_matrix; // max 2
optional_device<speaker_sound_device> m_speaker;
// misc common
UINT16 m_inp_mux; // multiplexed inputs mask
UINT8 read_inputs(int columns);
// display common
int m_display_wait; // led/lamp off-delay in microseconds (default 33ms)
int m_display_maxy; // display matrix number of rows
int m_display_maxx; // display matrix number of columns (max 31 for now)
UINT32 m_grid; // VFD current row data
UINT32 m_plate; // VFD current column data
UINT32 m_display_state[0x20]; // display matrix rows data (last bit is used for always-on)
UINT16 m_display_segmask[0x20]; // if not 0, display matrix row is a digit, mask indicates connected segments
UINT32 m_display_cache[0x20]; // (internal use)
UINT8 m_display_decay[0x20][0x20]; // (internal use)
TIMER_DEVICE_CALLBACK_MEMBER(display_decay_tick);
void display_update();
void set_display_size(int maxx, int maxy);
void display_matrix(int maxx, int maxy, UINT32 setx, UINT32 sety);
protected:
virtual void machine_start();
virtual void machine_reset();
};
// machine start/reset
void hh_melps4_state::machine_start()
{
// zerofill
memset(m_display_state, 0, sizeof(m_display_state));
memset(m_display_cache, ~0, sizeof(m_display_cache));
memset(m_display_decay, 0, sizeof(m_display_decay));
memset(m_display_segmask, 0, sizeof(m_display_segmask));
m_inp_mux = 0;
m_grid = 0;
m_plate = 0;
// register for savestates
save_item(NAME(m_display_maxy));
save_item(NAME(m_display_maxx));
save_item(NAME(m_display_wait));
save_item(NAME(m_display_state));
/* save_item(NAME(m_display_cache)); */ // don't save!
save_item(NAME(m_display_decay));
save_item(NAME(m_display_segmask));
save_item(NAME(m_inp_mux));
save_item(NAME(m_grid));
save_item(NAME(m_plate));
}
void hh_melps4_state::machine_reset()
{
}
/***************************************************************************
Helper Functions
***************************************************************************/
// The device may strobe the outputs very fast, it is unnoticeable to the user.
// To prevent flickering here, we need to simulate a decay.
void hh_melps4_state::display_update()
{
UINT32 active_state[0x20];
for (int y = 0; y < m_display_maxy; y++)
{
active_state[y] = 0;
for (int x = 0; x <= m_display_maxx; x++)
{
// turn on powered segments
if (m_display_state[y] >> x & 1)
m_display_decay[y][x] = m_display_wait;
// determine active state
UINT32 ds = (m_display_decay[y][x] != 0) ? 1 : 0;
active_state[y] |= (ds << x);
}
}
// on difference, send to output
for (int y = 0; y < m_display_maxy; y++)
if (m_display_cache[y] != active_state[y])
{
if (m_display_segmask[y] != 0)
output_set_digit_value(y, active_state[y] & m_display_segmask[y]);
const int mul = (m_display_maxx <= 10) ? 10 : 100;
for (int x = 0; x <= m_display_maxx; x++)
{
int state = active_state[y] >> x & 1;
char buf1[0x10]; // lampyx
char buf2[0x10]; // y.x
if (x == m_display_maxx)
{
// always-on if selected
sprintf(buf1, "lamp%da", y);
sprintf(buf2, "%d.a", y);
}
else
{
sprintf(buf1, "lamp%d", y * mul + x);
sprintf(buf2, "%d.%d", y, x);
}
output_set_value(buf1, state);
output_set_value(buf2, state);
}
}
memcpy(m_display_cache, active_state, sizeof(m_display_cache));
}
TIMER_DEVICE_CALLBACK_MEMBER(hh_melps4_state::display_decay_tick)
{
// slowly turn off unpowered segments
for (int y = 0; y < m_display_maxy; y++)
for (int x = 0; x <= m_display_maxx; x++)
if (m_display_decay[y][x] != 0)
m_display_decay[y][x]--;
display_update();
}
void hh_melps4_state::set_display_size(int maxx, int maxy)
{
m_display_maxx = maxx;
m_display_maxy = maxy;
}
void hh_melps4_state::display_matrix(int maxx, int maxy, UINT32 setx, UINT32 sety)
{
set_display_size(maxx, maxy);
// update current state
UINT32 mask = (1 << maxx) - 1;
for (int y = 0; y < maxy; y++)
m_display_state[y] = (sety >> y & 1) ? ((setx & mask) | (1 << maxx)) : 0;
display_update();
}
UINT8 hh_melps4_state::read_inputs(int columns)
{
UINT8 ret = 0;
// read selected input rows
for (int i = 0; i < columns; i++)
if (m_inp_mux >> i & 1)
ret |= m_inp_matrix[i]->read();
return ret;
}
/***************************************************************************
Minidrivers (subclass, I/O, Inputs, Machine Config)
***************************************************************************/
/***************************************************************************
Coleco Frogger (manufactured in Japan)
* PCB label Coleco Frogger Code No. 01-81543, KS-003282 Japan
* Mitsubishi M58846-701P MCU
* cyan/red/green VFD display Itron CP5090GLR R1B, with partial color overlay
NOTE!: MESS external artwork is recommended
***************************************************************************/
class cfrogger_state : public hh_melps4_state
{
public:
cfrogger_state(const machine_config &mconfig, device_type type, const char *tag)
: hh_melps4_state(mconfig, type, tag)
{ }
};
// handlers
// config
static INPUT_PORTS_START( cfrogger )
INPUT_PORTS_END
static MACHINE_CONFIG_START( cfrogger, cfrogger_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", M58846, XTAL_600kHz)
MCFG_TIMER_DRIVER_ADD_PERIODIC("display_decay", hh_melps4_state, display_decay_tick, attotime::from_msec(1))
MCFG_DEFAULT_LAYOUT(layout_hh_melps4_test)
/* no video! */
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
MACHINE_CONFIG_END
/***************************************************************************
Game driver(s)
***************************************************************************/
ROM_START( cfrogger )
ROM_REGION( 0x1000, "maincpu", 0 )
ROM_LOAD( "m58846-701p", 0x0000, 0x1000, CRC(ba52a242) SHA1(7fa53b617f4bb54be32eb209e9b88131e11cb518) )
ROM_END
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY, FULLNAME, FLAGS */
CONS( 1981, cfrogger, 0, 0, cfrogger, cfrogger, driver_device, 0, "Coleco", "Frogger (Coleco)", GAME_SUPPORTS_SAVE | GAME_REQUIRES_ARTWORK | GAME_NOT_WORKING )
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