// license:BSD-3-Clause // copyright-holders:Hans Andersson /************************************************************************* audio\tank8.c *************************************************************************/ #include "emu.h" #include "includes/tank8.h" #include "sound/discrete.h" /************************************************************************/ /* tank8 Sound System Analog emulation */ /* Written by Hans Andersson. Feb 2005 */ /************************************************************************/ static const discrete_lfsr_desc tank8_lfsr = { DISC_CLK_IS_FREQ, 16, /* Bit Length */ 0, /* Reset Value */ 10, /* Use Bit 10 as F0 input 0 */ 15, /* Use Bit 15 as F0 input 1 */ DISC_LFSR_XOR, /* F0 is XOR */ DISC_LFSR_XOR, /* F1 is F0 XOR with external feed. External feed is (address line) A2 */ DISC_LFSR_REPLACE, /* F2 replaces the shifted register contents */ 0x000001, /* Everything is shifted into the first bit only */ 1, /* Output is inverted by Q20 */ 12 /* Output bit */ }; static const discrete_integrate_info tank8_op1_integrate_info = { DISC_INTEGRATE_OP_AMP_1, RES_K(27), /* R98 */ RES_K(2.2), /* R97 */ RES_K(47), /* R96 */ CAP_U(0.22), /* C60 */ 5, 12, // B+ is 12V, not 15V shown in the schematic. 0, 0, 0, }; static const discrete_integrate_info tank8_op2_integrate_info = { DISC_INTEGRATE_OP_AMP_1, RES_K(27), /* R99 */ RES_K(2.2), /* R97 */ RES_K(47), /* R96 */ CAP_U(0.1), /* C59 */ 5, 12, // B+ is 12V, not 15V shown in the schematic. 0, 0, 0, }; static const discrete_555_desc tank8_555_a = { DISC_555_OUT_SQW | DISC_555_OUT_DC, 5, // B+ voltage of 555 DEFAULT_555_VALUES }; static const discrete_555_desc tank8_555_m = { DISC_555_OUT_SQW | DISC_555_OUT_DC | DISC_555_TRIGGER_IS_VOLTAGE, 5, // B+ voltage of 555 DEFAULT_555_VALUES }; static const discrete_op_amp_filt_info tank8_filt = { RES_K(18), // R56 0, RES_K(0.820), //R57 0, RES_K(330), //R58 CAP_U(.047), //C42 CAP_U(.047), //C43 0, 2.5, 5, /* VCC */ 0 /* VEE */ }; static const discrete_dac_r1_ladder tank8_dac = { 1, {RES_K(4.7)}, // R89 5, // 555 Vcc RES_K(5), // 555 internal RES_K(10), // 555 internal CAP_U(100) // C26 }; /* Nodes - Sounds */ #define TANK8_MOTOR1 NODE_15 #define TANK8_MOTOR2 NODE_16 #define TANK8_MOTOR3 NODE_17 #define TANK8_MOTOR4 NODE_18 #define TANK8_MOTOR5 NODE_19 #define TANK8_MOTOR6 NODE_20 #define TANK8_MOTOR7 NODE_21 #define TANK8_MOTOR8 NODE_22 #define TANK8_CRASHEXPL NODE_23 #define TANK8_BUGLE NODE_24 #define TANK8_FINAL_MIX NODE_25 #define TANK8_A2_LINE NODE_26 DISCRETE_SOUND_START(tank8_discrete) /************************************************/ /* Tank8 sound system: 10 Sound Sources */ /* Motor 1-8 */ /* Crash */ /* Explosion */ /* Bugle */ /************************************************/ /************************************************/ /* Input register mapping for tank8 */ /************************************************/ /* NODE */ DISCRETE_INPUT_LOGIC(TANK8_CRASH_EN) DISCRETE_INPUT_LOGIC(TANK8_EXPLOSION_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR1_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR2_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR3_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR4_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR5_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR6_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR7_EN) DISCRETE_INPUT_LOGIC(TANK8_MOTOR8_EN) DISCRETE_INPUT_NOT(TANK8_ATTRACT_EN) DISCRETE_INPUT_LOGIC(TANK8_BUGLE_EN) DISCRETE_INPUT_DATA(TANK8_BUGLE_DATA1) DISCRETE_INPUT_DATA(TANK8_BUGLE_DATA2) /************************************************/ /* Motor sound circuit is based on a 556 VCO */ /* with the input frequency set by a charging */ /* Capacitor. The DAC emulates the 555's */ /* internal CV resistance. */ /* A 9334 has typical 3.6V output. */ /************************************************/ DISCRETE_LOGIC_INVERT(NODE_30, TANK8_MOTOR1_EN) DISCRETE_DAC_R1(NODE_32, TANK8_MOTOR1_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_33, NODE_30, RES_K(220), RES_K(39), CAP_U(0.22), NODE_32, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_34, NODE_33, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_35, 1, NODE_34, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR1, 1, NODE_35, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_40, TANK8_MOTOR2_EN) DISCRETE_DAC_R1(NODE_42, TANK8_MOTOR2_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_43, NODE_40, RES_K(220), RES_K(39), CAP_U(0.22), NODE_42, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_44, NODE_43, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_45, 1, NODE_44, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR2, 1, NODE_45, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_50, TANK8_MOTOR3_EN) DISCRETE_DAC_R1(NODE_52, TANK8_MOTOR3_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_53, NODE_50, RES_K(220), RES_K(39), CAP_U(0.22), NODE_52, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_54, NODE_53, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_55, 1, NODE_54, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR3, 1, NODE_55, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_60, TANK8_MOTOR4_EN) DISCRETE_DAC_R1(NODE_62, TANK8_MOTOR4_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_63, NODE_60, RES_K(220), RES_K(39), CAP_U(0.22), NODE_62, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_64, NODE_63, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_65, 1, NODE_64, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR4, 1, NODE_65, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_70, TANK8_MOTOR5_EN) DISCRETE_DAC_R1(NODE_72, TANK8_MOTOR5_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_73, NODE_70, RES_K(220), RES_K(39), CAP_U(0.22), NODE_72, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_74, NODE_73, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_75, 1, NODE_74, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR5, 1, NODE_75, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_80, TANK8_MOTOR6_EN) DISCRETE_DAC_R1(NODE_82, TANK8_MOTOR6_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_83, NODE_80, RES_K(220), RES_K(39), CAP_U(0.22), NODE_82, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_84, NODE_83, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_85, 1, NODE_84, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR6, 1, NODE_85, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_90, TANK8_MOTOR7_EN) DISCRETE_DAC_R1(NODE_92, TANK8_MOTOR7_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_93, NODE_90, RES_K(220), RES_K(39), CAP_U(0.22), NODE_92, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_94, NODE_93, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_95, 1, NODE_94, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR7, 1, NODE_95, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) DISCRETE_LOGIC_INVERT(NODE_100, TANK8_MOTOR8_EN) DISCRETE_DAC_R1(NODE_102, TANK8_MOTOR8_EN, 3.6, &tank8_dac) DISCRETE_555_ASTABLE_CV(NODE_103, NODE_100, RES_K(220), RES_K(39), CAP_U(0.22), NODE_102, &tank8_555_a) DISCRETE_CRFILTER_VREF(NODE_104, NODE_103, RES_K(22), CAP_U(0.001), 5.0) DISCRETE_555_MSTABLE(NODE_105, 1, NODE_104, RES_K(56), CAP_U(0.1), &tank8_555_m) DISCRETE_OP_AMP_FILTER(TANK8_MOTOR8, 1, NODE_105, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &tank8_filt) /************************************************/ /* Bugle call is built from 9316 counter */ /* counter is clocked by the 1V signal. */ /* 1V = HSYNC/2 */ /* = 15750/2 */ /************************************************/ DISCRETE_DIVIDE(NODE_110,1,TANK8_BUGLE_DATA1,7875.0) DISCRETE_DIVIDE(NODE_111,1,TANK8_BUGLE_DATA2,7875.0) DISCRETE_SQUAREWAVE2(NODE_112,TANK8_BUGLE_EN,3.4, NODE_110, NODE_111,1.7,0) DISCRETE_RCDISC3(NODE_113,1, NODE_112, RES_K(10),RES_K(1),CAP_U(0.1), 0.5) DISCRETE_CRFILTER(TANK8_BUGLE, NODE_113, RES_K(47), CAP_U(.01)) /************************************************/ /* Noise generator is built from 2 shift */ /* registers that are clocked by the 2V signal. */ /* 2V = HSYNC/4 */ /* = 15750/4 */ /************************************************/ /* The A2 address line is also mixed in to the noise generator, * but that is currently not implemented. */ DISCRETE_CONSTANT(TANK8_A2_LINE,1) DISCRETE_LFSR_NOISE(NODE_120, TANK8_ATTRACT_EN, TANK8_ATTRACT_EN, 15750.0/4, 1, TANK8_A2_LINE, 0, &tank8_lfsr) /************************************************/ /* Explosion envelope is created by integrating */ /* a constant voltage */ /************************************************/ DISCRETE_INTEGRATE(NODE_121, TANK8_EXPLOSION_EN, 0, &tank8_op1_integrate_info) DISCRETE_GAIN(NODE_122, NODE_121, RES_K(2.2)/(RES_K(1.0)+RES_K(2.2))) /************************************************/ /* Crash envelope is created by integrating */ /* a constant voltage */ /************************************************/ DISCRETE_INTEGRATE(NODE_123, TANK8_CRASH_EN, 0, &tank8_op2_integrate_info) DISCRETE_GAIN(NODE_124, NODE_123, RES_K(1)/(RES_K(1.0)+RES_K(2.2))) /************************************************/ /* Add the envelopes and apply it to the noise */ /* generator */ /************************************************/ DISCRETE_ADDER2(NODE_125, 1 , NODE_122, NODE_124 ) DISCRETE_MULTIPLY(NODE_126, NODE_120, NODE_125 ) DISCRETE_RCFILTER(NODE_127, NODE_126, RES_K(47), CAP_U(0.1)) DISCRETE_ADJUSTMENT(NODE_128, 1.0, // min gain of E5 1.0 + 100.0/22, // max gain of E5 = 1 + r132/r101 DISC_LINADJ, "CRASH") DISCRETE_MULTIPLY(NODE_129, NODE_127, NODE_128 ) DISCRETE_CLAMP(TANK8_CRASHEXPL, NODE_129, -(12.0 - OP_AMP_VP_RAIL_OFFSET)/2, (12.0 - OP_AMP_VP_RAIL_OFFSET)/2) /************************************************/ /* Combine all 10 sound sources. */ /************************************************/ DISCRETE_ADDER4(NODE_130, 1, TANK8_MOTOR1, TANK8_MOTOR2, TANK8_MOTOR3, TANK8_MOTOR4) DISCRETE_MULTADD(NODE_131, NODE_130, 1.0, -10) DISCRETE_ADDER4(NODE_132, 1, TANK8_MOTOR5, TANK8_MOTOR6, TANK8_MOTOR7, TANK8_MOTOR8) DISCRETE_MULTADD(NODE_133, NODE_132, 1.0, -10) DISCRETE_ADDER4(TANK8_FINAL_MIX, TANK8_ATTRACT_EN, TANK8_CRASHEXPL, TANK8_BUGLE, NODE_131, NODE_133) DISCRETE_OUTPUT(TANK8_FINAL_MIX, 5000) DISCRETE_SOUND_END