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author hap <happppp@users.noreply.github.com>2015-01-18 00:07:48 +0100
committer hap <happppp@users.noreply.github.com>2015-01-18 00:07:48 +0100
commit27b34159d23e714c95f8fc837a6f0c0f97437855 (patch)
tree1321df10c2555c82c32308ee1d8ff88673bf7c2a
parent065e9be8fd413540ba31b6ec18d7dc10b65bfd6e (diff)
added led decay simulation as usual
-rw-r--r--src/mess/drivers/splitsec.c113
1 files changed, 110 insertions, 3 deletions
diff --git a/src/mess/drivers/splitsec.c b/src/mess/drivers/splitsec.c
index 2aae2430d3e..30ed07f08cf 100644
--- a/src/mess/drivers/splitsec.c
+++ b/src/mess/drivers/splitsec.c
@@ -25,21 +25,28 @@ public:
splitsec_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
-// m_button_matrix(*this, "IN"),
+ m_button_matrix(*this, "IN"),
m_speaker(*this, "speaker")
{ }
required_device<cpu_device> m_maincpu;
-// required_ioport_array<4> m_button_matrix;
+ required_ioport_array<2> m_button_matrix;
required_device<speaker_sound_device> m_speaker;
UINT16 m_r;
UINT16 m_o;
+ UINT16 m_leds_state[0x10];
+ UINT16 m_leds_cache[0x10];
+ UINT8 m_leds_decay[0x100];
+
DECLARE_READ8_MEMBER(read_k);
DECLARE_WRITE16_MEMBER(write_o);
DECLARE_WRITE16_MEMBER(write_r);
+ TIMER_DEVICE_CALLBACK_MEMBER(leds_decay_tick);
+ void leds_update();
+
virtual void machine_start();
};
@@ -47,23 +54,100 @@ public:
/***************************************************************************
+ LEDs
+
+***************************************************************************/
+
+// The device strobes the outputs very fast, it is unnoticeable to the user.
+// To prevent flickering here, we need to simulate a decay.
+
+// decay time, in steps of 10ms
+#define LEDS_DECAY_TIME 4
+
+void splitsec_state::leds_update()
+{
+ UINT16 active_state[0x10];
+
+ for (int i = 0; i < 0x10; i++)
+ {
+ // update current state
+ if (m_r >> i & 1)
+ m_leds_state[i] = m_o;
+
+ active_state[i] = 0;
+
+ for (int j = 0; j < 0x10; j++)
+ {
+ int di = j << 4 | i;
+
+ // turn on powered leds
+ if (m_leds_state[i] >> j & 1)
+ m_leds_decay[di] = LEDS_DECAY_TIME;
+
+ // determine active state
+ int ds = (m_leds_decay[di] != 0) ? 1 : 0;
+ active_state[i] |= (ds << j);
+ }
+ }
+
+ // on difference, send to output
+ for (int i = 0; i < 0x10; i++)
+ if (m_leds_cache[i] != active_state[i])
+ {
+ for (int j = 0; j < 8; j++)
+ output_set_lamp_value(i*10 + j, active_state[i] >> j & 1);
+ }
+
+ memcpy(m_leds_cache, active_state, sizeof(m_leds_cache));
+}
+
+TIMER_DEVICE_CALLBACK_MEMBER(splitsec_state::leds_decay_tick)
+{
+ // slowly turn off unpowered leds
+ for (int i = 0; i < 0x100; i++)
+ if (!(m_leds_state[i & 0xf] >> (i>>4) & 1) && m_leds_decay[i])
+ m_leds_decay[i]--;
+
+ leds_update();
+}
+
+
+
+/***************************************************************************
+
I/O
***************************************************************************/
READ8_MEMBER(splitsec_state::read_k)
{
- return 0;
+ UINT8 k = 0;
+
+ // read selected button rows
+ for (int i = 0; i < 2; i++)
+ if (m_r >> (i+9) & 1)
+ k |= m_button_matrix[i]->read();
+
+ return k;
}
WRITE16_MEMBER(splitsec_state::write_r)
{
+ // R8: speaker out
+ m_speaker->level_w(data >> 8 & 1);
+
+ // R9,R10: input mux
+ // R0-R7: led columns
m_r = data;
+ leds_update();
}
WRITE16_MEMBER(splitsec_state::write_o)
{
+ // O0-O6: led rows
+ // O7: N/C
m_o = data;
+ leds_update();
}
@@ -75,6 +159,17 @@ WRITE16_MEMBER(splitsec_state::write_o)
***************************************************************************/
static INPUT_PORTS_START( splitsec )
+ PORT_START("IN.0") // R9
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT )
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP )
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT )
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNUSED )
+
+ PORT_START("IN.1") // R10
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN )
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("Select")
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("Start")
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNUSED )
INPUT_PORTS_END
@@ -87,9 +182,19 @@ INPUT_PORTS_END
void splitsec_state::machine_start()
{
+ // zerofill
+ memset(m_leds_state, 0, sizeof(m_leds_state));
+ memset(m_leds_cache, 0, sizeof(m_leds_cache));
+ memset(m_leds_decay, 0, sizeof(m_leds_decay));
+
m_r = 0;
m_o = 0;
+ // register for savestates
+ save_item(NAME(m_leds_state));
+ save_item(NAME(m_leds_cache));
+ save_item(NAME(m_leds_decay));
+
save_item(NAME(m_r));
save_item(NAME(m_o));
}
@@ -103,6 +208,8 @@ static MACHINE_CONFIG_START( splitsec, splitsec_state )
MCFG_TMS1XXX_WRITE_O_CB(WRITE16(splitsec_state, write_o))
MCFG_TMS1XXX_WRITE_R_CB(WRITE16(splitsec_state, write_r))
+ MCFG_TIMER_DRIVER_ADD_PERIODIC("leds_decay", splitsec_state, leds_decay_tick, attotime::from_msec(10))
+
MCFG_DEFAULT_LAYOUT(layout_splitsec)
/* no video! */