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hh_sm510: override default lcd decay for some games (nw)

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This commit is contained in:
hap 2019-10-06 22:27:37 +02:00
parent 5aac500dee
commit 38fd19fe30
2 changed files with 30 additions and 12 deletions
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36
src/mame/drivers/hh_sm510.cpp
View File

@ -170,12 +170,13 @@ void hh_sm510_state::machine_start()
save_item(NAME(m_s));
save_item(NAME(m_r));
save_item(NAME(m_display_wait));
save_item(NAME(m_display_x_len));
save_item(NAME(m_display_y_len));
save_item(NAME(m_display_z_len));
save_item(NAME(m_display_state));
save_item(NAME(m_display_decay));
save_item(NAME(m_decay_pivot));
save_item(NAME(m_decay_len));
}
void hh_sm510_state::machine_reset()
@ -205,12 +206,12 @@ TIMER_CALLBACK_MEMBER(hh_sm510_state::display_decay_tick)
// delay lcd segment on/off state
if (m_display_state[zx] >> y & 1)
{
if (m_display_decay[y][zx] < (2 * m_display_wait - 1))
if (m_display_decay[y][zx] < (m_decay_pivot + m_decay_len))
m_display_decay[y][zx]++;
}
else if (m_display_decay[y][zx] > 0)
m_display_decay[y][zx]--;
u8 active_state = (m_display_decay[y][zx] < m_display_wait) ? 0 : 1;
u8 active_state = (m_display_decay[y][zx] < m_decay_pivot) ? 0 : 1;
// SM510 series: output to x.y.z, where:
// x = group a/b/bs/c (0/1/2/3)
@ -238,14 +239,12 @@ void hh_sm510_state::set_display_size(u8 x, u8 y, u8 z)
WRITE16_MEMBER(hh_sm510_state::sm510_lcd_segment_w)
{
m_display_wait = 8;
set_display_size(2, 16, 2);
m_display_state[offset] = data;
}
WRITE16_MEMBER(hh_sm510_state::sm500_lcd_segment_w)
{
m_display_wait = 12;
set_display_size(4, 4, 1);
m_display_state[offset] = data;
}
@ -1487,6 +1486,7 @@ ROM_END
This is the wide screen version, there's also a silver version. Doing a
hex-compare between the two, this one seems to be a complete rewrite.
FR-27 is the last G&W on SM5A, they were followed with SM51x.
In 1989 Elektronika(USSR) released a clone: Космический мост (Kosmicheskiy most,
export version: Space Bridge). This game shares the same ROM, though the
@ -1613,7 +1613,11 @@ class gnw_tbridge_state : public hh_sm510_state
public:
gnw_tbridge_state(const machine_config &mconfig, device_type type, const char *tag) :
hh_sm510_state(mconfig, type, tag)
{ }
{
// increase lcd decay: unwanted segments light up
m_decay_pivot = 25;
m_decay_len = 25;
}
void gnw_tbridge(machine_config &config);
};
@ -2725,7 +2729,10 @@ class gnw_squish_state : public hh_sm510_state
public:
gnw_squish_state(const machine_config &mconfig, device_type type, const char *tag) :
hh_sm510_state(mconfig, type, tag)
{ }
{
// increase lcd decay: unwanted segments light up
m_decay_pivot = 17;
}
void gnw_squish(machine_config &config);
};
@ -4441,7 +4448,10 @@ class kcontra_state : public hh_sm510_state
public:
kcontra_state(const machine_config &mconfig, device_type type, const char *tag) :
hh_sm510_state(mconfig, type, tag)
{ }
{
// increase lcd decay: score digit flickers
m_decay_len = 20;
}
void kcontra(machine_config &config);
};
@ -4838,7 +4848,10 @@ class knfl_state : public hh_sm510_state
public:
knfl_state(const machine_config &mconfig, device_type type, const char *tag) :
hh_sm510_state(mconfig, type, tag)
{ }
{
// increase lcd decay: too much overall flicker
m_decay_len = 35;
}
void knfl(machine_config &config);
};
@ -5073,7 +5086,10 @@ class kgarfld_state : public hh_sm510_state
public:
kgarfld_state(const machine_config &mconfig, device_type type, const char *tag) :
hh_sm510_state(mconfig, type, tag)
{ }
{
// increase lcd decay: too much overall flicker
m_decay_len = 30;
}
void kgarfld(machine_config &config);
};

6
src/mame/includes/hh_sm510.h
View File

@ -24,7 +24,8 @@ public:
m_out_x(*this, "%u.%u.%u", 0U, 0U, 0U),
m_inp_lines(0),
m_inp_fixed(-1),
m_display_wait(8)
m_decay_pivot(7),
m_decay_len(17)
{ }
// devices
@ -58,7 +59,8 @@ public:
virtual DECLARE_WRITE8_MEMBER(piezo2bit_input_w);
// display common
int m_display_wait; // lcd segment on/off-delay in 1kHz ticks
int m_decay_pivot; // lcd segment off-to-on delay in 1kHz ticks (affects input lag)
int m_decay_len; // lcd segment on-to-off delay in 1kHz ticks (lcd persistence)
u8 m_display_x_len; // lcd number of groups
u8 m_display_y_len; // lcd number of segments
u8 m_display_z_len; // lcd number of commons