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// license:BSD-3-Clause
// copyright-holders:Derrick Renaud
/************************************************************************
* m79amb Sound System Analog emulation
* Nov 2008, Derrick Renaud
************************************************************************/
#include "emu.h"
#include "includes/m79amb.h"
#include "sound/discrete.h"
#define TIME_OF_9602(r, c) (0.34 * (r) * (c) * (1.0 + 1.0 / (r)))
#define TIME_OF_9602_WITH_DIODE(r, c) (0.3 * (r) * (c))
/* Discrete Sound Input Nodes */
#define M79AMB_BOOM_EN NODE_01
#define M79AMB_THUD_EN NODE_02
#define M79AMB_SHOT_EN NODE_03
#define M79AMB_MC_REV_EN NODE_04
#define M79AMB_MC_CONTROL_EN NODE_05
#define M79AMB_TANK_TRUCK_JEEP_EN NODE_06
#define M79AMB_WHISTLE_A_EN NODE_07
#define M79AMB_WHISTLE_B_EN NODE_08
/* Discrete Sound Output Nodes */
#define M79AMB_BOOM_SND NODE_11
#define M79AMB_THUD_SND NODE_12
#define M79AMB_SHOT_SND NODE_13
#define M79AMB_MC_SND NODE_14
#define M79AMB_TANK_TRUCK_JEEP_SND NODE_15
#define M79AMB_WHISTLE_A_SND NODE_16
#define M79AMB_WHISTLE_B_SND NODE_17
/* Parts List - Resistors */
#define M79AMB_R2 RES_K(5.6)
#define M79AMB_R6 220
#define M79AMB_R9 RES_K(4.7)
#define M79AMB_R10 RES_K(2.2)
#define M79AMB_R12 RES_K(5.6)
#define M79AMB_R16 330
#define M79AMB_R19 RES_K(4.7)
#define M79AMB_R20 RES_K(2.2)
#define M79AMB_R22 RES_K(3.3)
#define M79AMB_R26 100
#define M79AMB_R29 RES_K(4.7)
#define M79AMB_R30 RES_K(1.5)
#define M79AMB_R35 RES_K(470)
#define M79AMB_R36 RES_K(39)
#define M79AMB_R37 RES_K(82)
#define M79AMB_R38 100
#define M79AMB_R39 RES_K(10)
#define M79AMB_R41 RES_K(2.2)
#define M79AMB_R42 RES_K(10)
#define M79AMB_R43 220
#define M79AMB_R44 RES_K(39)
#define M79AMB_R45 RES_K(82)
#define M79AMB_R46 RES_K(10)
#define M79AMB_R48 RES_K(2.2)
#define M79AMB_R49 RES_K(1)
#define M79AMB_R51 RES_K(39)
#define M79AMB_R52 RES_K(82)
#define M79AMB_R53 100
#define M79AMB_R54 RES_K(10)
#define M79AMB_R57 RES_K(2.2)
#define M79AMB_R58 RES_K(2.2)
#define M79AMB_R59 RES_K(1)
#define M79AMB_R61 RES_K(39)
#define M79AMB_R62 RES_K(82)
#define M79AMB_R63 100
#define M79AMB_R64 RES_K(10)
#define M79AMB_R67 RES_K(2.2)
#define M79AMB_R68 RES_K(2.2)
#define M79AMB_R69 RES_K(1)
#define M79AMB_R76 RES_K(2.7)
#define M79AMB_R77 RES_K(47)
#define M79AMB_R78 RES_K(47)
#define M79AMB_R79 RES_K(15)
#define M79AMB_R80 RES_K(22)
#define M79AMB_R81 RES_K(100)
#define M79AMB_R82 RES_K(100)
#define M79AMB_R83 RES_K(3.3)
#define M79AMB_R84 RES_K(50)
#define M79AMB_R86 470
/* Parts List - Capacitors */
#define M79AMB_C2 CAP_U(39)
#define M79AMB_C3 CAP_U(22)
#define M79AMB_C6 CAP_U(0.1)
#define M79AMB_C8 CAP_U(39)
#define M79AMB_C9 CAP_U(22)
#define M79AMB_C12 CAP_U(0.1)
#define M79AMB_C14 CAP_U(4.7)
#define M79AMB_C15 CAP_U(3.3)
#define M79AMB_C18 CAP_U(0.1)
#define M79AMB_C20 CAP_U(2.2)
#define M79AMB_C21 CAP_U(1)
#define M79AMB_C22 CAP_U(22)
#define M79AMB_C23 CAP_U(0.01)
#define M79AMB_C25 CAP_U(2.2)
#define M79AMB_C26 CAP_U(22)
#define M79AMB_C27 CAP_U(0.47)
#define M79AMB_C28 CAP_U(0.1)
#define M79AMB_C29 CAP_U(22)
#define M79AMB_C30 CAP_U(0.03)
#define M79AMB_C31 CAP_U(0.1)
#define M79AMB_C32 CAP_U(0.1)
#define M79AMB_C33 CAP_U(22)
#define M79AMB_C34 CAP_U(0.03)
#define M79AMB_C35 CAP_U(0.1)
#define M79AMB_C36 CAP_U(0.1)
#define M79AMB_C37 CAP_P(500)
#define M79AMB_C41 CAP_U(0.1)
#define M79AMB_C42 CAP_U(15)
static const discrete_mixer_desc m79amb_final_mix =
{
DISC_MIXER_IS_OP_AMP,
{
M79AMB_R76 + M79AMB_R9,
M79AMB_R77 + M79AMB_R19,
M79AMB_R78 + M79AMB_R29,
M79AMB_R79 + RES_2_PARALLEL(M79AMB_R41, M79AMB_R42 + M79AMB_R43),
M79AMB_R80 + RES_2_PARALLEL(M79AMB_R48, M79AMB_R49),
M79AMB_R81 + RES_2_PARALLEL(M79AMB_R59, M79AMB_R57 + M79AMB_R58),
M79AMB_R82 + RES_2_PARALLEL(M79AMB_R69, M79AMB_R67 + M79AMB_R68)
},
{0}, /* no r_nodes */
{M79AMB_C6, M79AMB_C12, M79AMB_C18, M79AMB_C23, M79AMB_C28, M79AMB_C32, M79AMB_C36},
0,
M79AMB_R83 + M79AMB_R84,
M79AMB_C37,
M79AMB_C42,
0,
1 /* gain */
};
DISCRETE_SOUND_START( m79amb )
/************************************************
* Input register mapping
************************************************/
DISCRETE_INPUT_PULSE(M79AMB_BOOM_EN, 0)
DISCRETE_INPUT_PULSE(M79AMB_THUD_EN, 0)
DISCRETE_INPUT_PULSE(M79AMB_SHOT_EN, 0)
DISCRETE_INPUT_LOGIC(M79AMB_MC_REV_EN)
DISCRETE_INPUT_LOGIC(M79AMB_MC_CONTROL_EN)
DISCRETE_INPUT_LOGIC(M79AMB_TANK_TRUCK_JEEP_EN)
DISCRETE_INPUT_LOGIC(M79AMB_WHISTLE_A_EN)
DISCRETE_INPUT_LOGIC(M79AMB_WHISTLE_B_EN)
/* Boom, Thud, Shot sounds need more accurate emulation */
/************************************************
* Boom
************************************************/
DISCRETE_ONESHOT(NODE_20,
M79AMB_BOOM_EN, /* TRIG */
1, /* AMPL */
TIME_OF_9602_WITH_DIODE(M79AMB_R2, M79AMB_C2),
DISC_ONESHOT_REDGE | DISC_ONESHOT_RETRIG | DISC_OUT_ACTIVE_HIGH)
DISCRETE_RCDISC2(NODE_21,
NODE_20, /* Q1 base */
0, /* Q1 off, C3 discharges */
M79AMB_R9 + M79AMB_R10, /* discharges through amp/filter circuit */
12, /* Q1 on, C3 charges */
M79AMB_R6, /* Q2 on */
M79AMB_C3) /* controls amplitude */
DISCRETE_NOISE(M79AMB_BOOM_SND,
1, /* ENAB */
800, /* FREQ - Guess*/
NODE_21, /* AMP */
0) /* BIAS - fake AC is fine*/
/************************************************
* Thud
************************************************/
DISCRETE_ONESHOT(NODE_30,
M79AMB_THUD_EN, /* TRIG */
1, /* AMPL */
TIME_OF_9602_WITH_DIODE(M79AMB_R12, M79AMB_C8),
DISC_ONESHOT_REDGE | DISC_ONESHOT_RETRIG | DISC_OUT_ACTIVE_HIGH)
DISCRETE_RCDISC2(NODE_31,
NODE_30, /* Q4 base */
0, /* Q4 off, C9 discharges */
M79AMB_R19 + M79AMB_R20, /* discharges through amp/filter circuit */
12, /* Q4 on, C9 charges */
M79AMB_R16, /* Q5 on */
M79AMB_C9) /* controls amplitude */
DISCRETE_NOISE(M79AMB_THUD_SND,
1, /* ENAB */
500, /* FREQ - Guess*/
NODE_31, /* AMP */
0) /* BIAS - fake AC is fine*/
/************************************************
* Shot
************************************************/
DISCRETE_ONESHOT(NODE_40,
M79AMB_SHOT_EN, /* TRIG */
1, /* AMPL */
TIME_OF_9602_WITH_DIODE(M79AMB_R22, M79AMB_C14),
DISC_ONESHOT_REDGE | DISC_ONESHOT_RETRIG | DISC_OUT_ACTIVE_HIGH)
DISCRETE_RCDISC2(NODE_41,
NODE_40, /* Q7 base */
0, /* Q7 off, C15 discharges */
M79AMB_R29 + M79AMB_R30, /* discharges through amp/filter circuit */
12, /* Q7 on, C15 charges */
M79AMB_R26, /* Q8 on */
M79AMB_C15) /* controls amplitude */
DISCRETE_NOISE(M79AMB_SHOT_SND,
1, /* ENAB */
1000, /* FREQ - Guess*/
NODE_41, /* AMP */
0) /* BIAS - fake AC is fine*/
/************************************************
* MC
************************************************/
/* not the best implementation of the pin 5 charge circuit, but it is within tolerance */
DISCRETE_RCDISC2(NODE_50,
M79AMB_MC_REV_EN,
/* R35 can be ignored on discharge */
RES_VOLTAGE_DIVIDER(M79AMB_R36 + M79AMB_R37, M79AMB_R38) * 12, /* Q12 on */
RES_2_PARALLEL(M79AMB_R36 + M79AMB_R37, M79AMB_R38), /* Q12 on */
12.0 * RES_VOLTAGE_DIVIDER(M79AMB_R36, M79AMB_R35), /* Q12 off */
RES_2_PARALLEL(M79AMB_R36, M79AMB_R35) + M79AMB_R37, /* Q12 off */
M79AMB_C20)
/* cap charge to B+ ratio changes voltage on pin 5 */
/* (iR36 + iR35 + iR37) * R36||R35||R37 where iR35 = 0/R35 = 0 */
DISCRETE_TRANSFORM4(NODE_51, 12.0 / M79AMB_R36, NODE_50, M79AMB_R37, RES_3_PARALLEL(M79AMB_R36, M79AMB_R35, M79AMB_R37), "012/+3*")
DISCRETE_566(NODE_52, /* IC U3, pin 4 */
NODE_51, /* IC U3, pin 5 */
M79AMB_R39, M79AMB_C21,
12, 0, 12, /* VPOS,VNEG,VCHARGE */
DISC_566_OUT_DC | DISC_566_OUT_TRIANGLE)
DISCRETE_CRFILTER(NODE_53,
NODE_52, M79AMB_R41 + M79AMB_R42 + M79AMB_R43, M79AMB_C22)
DISCRETE_MULTIPLY(NODE_54, NODE_53, M79AMB_MC_CONTROL_EN)
DISCRETE_GAIN(M79AMB_MC_SND, NODE_54, RES_VOLTAGE_DIVIDER(M79AMB_R41 + M79AMB_R42, 2200))//M79AMB_R43))
/************************************************
* Tank, Truck, Jeep
************************************************/
DISCRETE_566(NODE_60, /* IC U4, pin 4 */
12.0 * RES_VOLTAGE_DIVIDER(M79AMB_R44, M79AMB_R45), /* IC U5, pin 5 */
M79AMB_R46, M79AMB_C25,
12, 0, 12, /* VPOS,VNEG,VCHARGE */
DISC_566_OUT_DC | DISC_566_OUT_TRIANGLE)
DISCRETE_ONOFF(NODE_61,
M79AMB_TANK_TRUCK_JEEP_EN, /* Q16, Q17 */
NODE_60)
DISCRETE_CRFILTER(NODE_62,
NODE_61, M79AMB_R48 + M79AMB_R49, M79AMB_C26)
DISCRETE_GAIN(NODE_63, NODE_62, RES_VOLTAGE_DIVIDER(M79AMB_R48, M79AMB_R49))
DISCRETE_RCFILTER(M79AMB_TANK_TRUCK_JEEP_SND,
NODE_63, RES_2_PARALLEL(M79AMB_R48, M79AMB_R49), M79AMB_C27)
/************************************************
* Whisle A
************************************************/
DISCRETE_RCDISC2(NODE_70,
M79AMB_WHISTLE_A_EN,
RES_VOLTAGE_DIVIDER(M79AMB_R51 + M79AMB_R52, M79AMB_R53) * 12, /* Q15 on */
RES_2_PARALLEL(M79AMB_R53, M79AMB_R51 + M79AMB_R52), /* Q15 on */
12, M79AMB_R51 + M79AMB_R52, /* Q15 off */
M79AMB_C29)
/* cap charge to B+ ratio changes voltage on pin 5 */
DISCRETE_TRANSFORM3(NODE_71, 12, NODE_70, RES_VOLTAGE_DIVIDER(M79AMB_R51, M79AMB_R52), "01-2*1+")
DISCRETE_566(NODE_72, /* IC U5, pin 4 */
NODE_71, /* IC U5, pin 5 */
M79AMB_R54, M79AMB_C30,
12, 0, 12, /* VPOS,VNEG,VCHARGE */
DISC_566_OUT_DC | DISC_566_OUT_TRIANGLE)
DISCRETE_CRFILTER(NODE_73,
NODE_72, M79AMB_R57 + M79AMB_R58 + M79AMB_R59, M79AMB_C31)
DISCRETE_MULTIPLY(NODE_74, NODE_73, M79AMB_WHISTLE_A_EN) /* Q16, Q17 */
DISCRETE_GAIN(M79AMB_WHISTLE_A_SND, NODE_74, RES_VOLTAGE_DIVIDER(M79AMB_R57 + M79AMB_R58, M79AMB_R59))
/************************************************
* Whisle B
************************************************/
DISCRETE_RCDISC2(NODE_80,
M79AMB_WHISTLE_B_EN,
RES_VOLTAGE_DIVIDER(M79AMB_R61 + M79AMB_R62, M79AMB_R63) * 12, /* Q18 on */
RES_2_PARALLEL(M79AMB_R63, M79AMB_R61 + M79AMB_R62), /* Q18 on */
12, M79AMB_R61 + M79AMB_R62, /* Q18 off */
M79AMB_C33)
/* cap charge to B+ ratio changes voltage on pin 5 */
DISCRETE_TRANSFORM3(NODE_81, 12, NODE_80, RES_VOLTAGE_DIVIDER(M79AMB_R61, M79AMB_R62), "01-2*1+")
DISCRETE_566(NODE_82, /* IC U5, pin 4 */
NODE_81, /* IC U5, pin 5 */
M79AMB_R64, M79AMB_C34,
12, 0, 12, /* VPOS,VNEG,VCHARGE */
DISC_566_OUT_DC | DISC_566_OUT_TRIANGLE)
DISCRETE_CRFILTER(NODE_83,
NODE_82, M79AMB_R67 + M79AMB_R68 + M79AMB_R69, M79AMB_C35)
DISCRETE_MULTIPLY(NODE_84, NODE_83, M79AMB_WHISTLE_B_EN) /* Q19, Q20*/
DISCRETE_GAIN(M79AMB_WHISTLE_B_SND, NODE_84, RES_VOLTAGE_DIVIDER(M79AMB_R67 + M79AMB_R68, M79AMB_R69))
/************************************************
* Mixer
************************************************/
DISCRETE_MIXER7(NODE_90, /* IC U7, pin 6 */
1, /* ENAB */
M79AMB_BOOM_SND,
M79AMB_THUD_SND,
M79AMB_SHOT_SND,
M79AMB_MC_SND,
M79AMB_TANK_TRUCK_JEEP_SND,
M79AMB_WHISTLE_A_SND,
M79AMB_WHISTLE_B_SND,
&m79amb_final_mix)
DISCRETE_RCFILTER(NODE_91,
NODE_90, M79AMB_R86, M79AMB_C41)
DISCRETE_OUTPUT(NODE_91, 32000.0/5)
DISCRETE_SOUND_END
/* the ports are guessed from operation */
/* the schematics do not show the actual hookup */
WRITE8_MEMBER(m79amb_state::m79amb_8000_w)
{
/* these values are not latched */
/* they are pulsed when the port is addressed */
/* the discrete system will just trigger from them */
m_discrete->write(space, M79AMB_SHOT_EN, data & 0x01);
m_discrete->write(space, M79AMB_BOOM_EN, data & 0x02);
m_discrete->write(space, M79AMB_THUD_EN, data & 0x04);
}
WRITE8_MEMBER(m79amb_state::m79amb_8003_w)
{
/* Self Test goes low on reset and lights LED */
/* LED goes off on pass */
machine().output().set_value("SELF_TEST", data & 0x01);
m_discrete->write(space, M79AMB_MC_REV_EN, data & 0x02);
m_discrete->write(space, M79AMB_MC_CONTROL_EN, data & 0x04);
m_discrete->write(space, M79AMB_TANK_TRUCK_JEEP_EN, data & 0x08);
m_discrete->write(space, M79AMB_WHISTLE_B_EN, data & 0x10);
m_discrete->write(space, M79AMB_WHISTLE_A_EN, data & 0x20);
}
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