MAMEWorld Forums - EmuChat

* Taito "Indian Battle" */
/* Sept 2005, D.R. */
/*******************************************************/
static const discrete_dac_r1_ladder indianbt_music_dac =
{3, {0, RES_K(47), RES_K(12)}, 0, 0, 0, CAP_U(0.1)};

#define INDIANBT_MUSIC_CLK (7680.0*2*2*2)

/* Nodes - Inputs */
#define INDIANBT_MUSIC_DATA NODE_01
/* Nodes - Sounds */
#define INDIANBT_MUSIC NODE_11

DISCRETE_SOUND_START(indianbt)

DISCRETE_INPUT_DATA (INDIANBT_MUSIC_DATA)

/******************************************************************************
*
* Music Generator
*
******************************************************************************/
DISCRETE_NOTE(NODE_20, 1, INDIANBT_MUSIC_CLK, INDIANBT_MUSIC_DATA, 255, 5, DISC_CLK_IS_FREQ)

// Convert count to 7492 output
DISCRETE_TRANSFORM2(NODE_21, NODE_20, 2, "01>0+")

DISCRETE_DAC_R1(NODE_22, NODE_21, DEFAULT_TTL_V_LOGIC_1, &indianbt_music_dac)

/******************************************************************************
*
* Final Mixing and Output
*
******************************************************************************/
DISCRETE_CRFILTER(NODE_90, NODE_22, RES_K(10), CAP_U(0.1))

DISCRETE_OUTPUT(NODE_90, 21000)

DISCRETE_SOUND_END

WRITE8_HANDLER( indianbt_sh_port_1_w )
{
/* bit 4 occurs every 5.25 seconds during gameplay */
_8080bw_state *state = space->machine().driver_data<_8080bw_state>();
UINT8 rising_bits = data & ~state->m_port_1_last_extra;

if (rising_bits & 0x01) sample_start(state->m_samples, 1, 7, 0); /* Death */
if (rising_bits & 0x02) sample_start(state->m_samples, 0, 1, 0); /* Shot Sound */
if (rising_bits & 0x04) sample_start(state->m_samples, 2, 3, 0); /* Move */
if (rising_bits & 0x08) sample_start(state->m_samples, 3, 2, 0); /* Hit */

space->machine().sound().system_enable(data & 0x20);

state->m_screen_red = data & 0x01;

state->m_port_1_last_extra = data;
}

WRITE8_HANDLER( indianbt_sh_port_2_w )
{
_8080bw_state *state = space->machine().driver_data<_8080bw_state>();
UINT8 rising_bits = data & ~state->m_port_2_last_extra;

if (rising_bits & 0x01) sample_start(state->m_samples, 4, 0, 0); /* Bird dropped an egg, Lasso used */
if (rising_bits & 0x02) sample_start(state->m_samples, 4, 2, 0); /* Egg hatches, egg shot */
if (rising_bits & 0x08) sample_start(state->m_samples, 5, 0, 0); /* Grabber, Lasso caught something */
if (rising_bits & 0x10) sample_start(state->m_samples, 3, 7, 0); /* Lasso sound */

state->m_port_2_last_extra = data;
}

WRITE8_DEVICE_HANDLER( indianbt_sh_port_3_w )
{
discrete_sound_w(device, INDIANBT_MUSIC_DATA, data);
}

Será que eu entendi que tem um componente CHAMADO 7492?