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author | 2015-11-08 12:56:12 +0100 | |
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committer | 2015-11-08 12:56:12 +0100 | |
commit | 7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch) | |
tree | f310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/mame/audio/skyraid.cpp | |
parent | a57b46ae933badd7441ce1644711dbb851e2b504 (diff) |
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/mame/audio/skyraid.cpp')
-rw-r--r-- | src/mame/audio/skyraid.cpp | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/src/mame/audio/skyraid.cpp b/src/mame/audio/skyraid.cpp new file mode 100644 index 00000000000..1d872d8d1e5 --- /dev/null +++ b/src/mame/audio/skyraid.cpp @@ -0,0 +1,303 @@ +// license:??? +// copyright-holders:Derrick Renaud +/************************************************************************ + * skyraid Sound System Analog emulation + * Sept 2009, Derrick Renaud + ************************************************************************/ + +#include "emu.h" +#include "includes/skyraid.h" + + +/* Discrete Sound Input Nodes */ +#define SKYRAID_PLANE_SWEEP_EN NODE_01 +#define SKYRAID_MISSILE_EN NODE_02 +#define SKYRAID_EXPLOSION_EN NODE_03 +#define SKYRAID_PLANE_ON_EN NODE_04 +#define SKYRAID_PLANE_ON__IC_E8 SKYRAID_PLANE_ON_EN +#define SKYRAID_ATTRACT_EN NODE_05 + +/* Discrete Sound Output Nodes */ +#define SKYRAID_NOISE NODE_10 +#define SKYRAID_EXPLOSION_SND NODE_11 +#define SKYRAID_JET_A_SND NODE_12 +#define SKYRAID_JET_B_SND NODE_13 +#define SKYRAID_MSL_A_SND NODE_14 +#define SKYRAID_MSL_B_SND NODE_15 +#define SKYRAID_PLANE_SND NODE_16 + +/* Parts List - Resistors */ +#define SKYRAID_R12 RES_K(1) +#define SKYRAID_R13 RES_K(10) +#define SKYRAID_R14 RES_K(100) +#define SKYRAID_R16 RES_K(10) +#define SKYRAID_R18 RES_K(10) +#define SKYRAID_R19 RES_K(10) +#define SKYRAID_R20 RES_K(47) +#define SKYRAID_R24 RES_M(10) +#define SKYRAID_R25 RES_M(3.9) +#define SKYRAID_R27 RES_M(1.5) +#define SKYRAID_R28 RES_M(1.5) +#define SKYRAID_R29 RES_M(4.7) +#define SKYRAID_R30 RES_M(1) +#define SKYRAID_R31 RES_M(1) +#define SKYRAID_R32 RES_M(4.7) +#define SKYRAID_R84 RES_K(22) +#define SKYRAID_R85 RES_K(100) +#define SKYRAID_R86 820 +#define SKYRAID_R110 RES_K(330) +#define SKYRAID_R118 RES_K(470) +#define SKYRAID_R119 RES_K(10) +#define SKYRAID_R120 RES_K(220) +#define SKYRAID_R121 RES_K(1) +#define SKYRAID_R122 RES_K(150) + +/* Parts List - Capacitors */ +#define SKYRAID_C44 CAP_U(4.7) +#define SKYRAID_C45 CAP_U(.0047) +#define SKYRAID_C46 CAP_U(.001) +#define SKYRAID_C48 CAP_U(.0047) +#define SKYRAID_C49 CAP_U(.1) +#define SKYRAID_C50 CAP_U(.001) +#define SKYRAID_C51 CAP_U(.01) +#define SKYRAID_C68 CAP_U(10) +#define SKYRAID_C85 CAP_U(.068) +#define SKYRAID_C86 CAP_U(.1) +#define SKYRAID_C93 CAP_U(.1) + + +static const discrete_lfsr_desc skyraid_lfsr = +{ + DISC_CLK_IS_FREQ, + 16, /* Bit Length */ + 0, /* Reset Value */ + 0, /* Use Bit 0 as XOR input 0 */ + 14, /* Use Bit 14 as XOR input 1 */ + DISC_LFSR_XNOR, /* Feedback stage1 is XNOR */ + DISC_LFSR_OR, /* Feedback stage2 is just stage 1 output OR with external feed */ + DISC_LFSR_REPLACE, /* Feedback stage3 replaces the shifted register contents */ + 0x000001, /* Everything is shifted into the first bit only */ + DISC_LFSR_FLAG_RESET_TYPE_H, /* Output is not inverted */ + 15 /* Output bit */ +}; + +static const discrete_op_amp_filt_info skyraid_explosion_filter = +{ + SKYRAID_R85, 0, SKYRAID_R86, 0, SKYRAID_R110, /* r1, r2, r3, r4, rF*/ + SKYRAID_C85, SKYRAID_C86, 0, /* c1, c2, c3 */ + 0, 12, -5, /* vRef, vP, vN */ +}; + +static const discrete_dac_r1_ladder skyraid_plane_dac = +{ + 2, {SKYRAID_R28, SKYRAID_R27}, + 0, 0, 0, 0 /* no vBias, rBias, rGnd, cFilter */ +}; + +static const discrete_mixer_desc skyraid_mixer = +{ + DISC_MIXER_IS_RESISTOR, + {SKYRAID_R120, SKYRAID_R32, SKYRAID_R29, SKYRAID_R30, SKYRAID_R31, RES_2_PARALLEL(SKYRAID_R28, SKYRAID_R27)}, + {0, 0, 0, 0, 0, SKYRAID_PLANE_ON__IC_E8}, /* r_nodes */ + {0}, 0, 0, 0, 0, 0, 1 /* no c, rI, rF, cF, cAmp, vRef, gain */ +}; + + +/************************************************************************ + * + * Custom skyraid missle charge + * + * input[0] - In1 (Logic) + * input[1] - R1 + * input[2] - R2 + * input[3] - R3 + * input[4] - C + * + * 12V 5V + * v v + * | | + * Z --- + * Z R1 ^ 1N914 + * Z / \ Diode + * | ----- + * | | + * +--------------+ + * | | + * --- Z + * --- C Z R2 + * | Z + * | | + * +--------------+----> Node Output + * | + * Z + * Z R3 + * O.C. Z + * |\ | + * In1 >--| o--+ + * |/ + * + ************************************************************************/ +#define SKYRAID_MISSLE_CUSTOM_IN1 DISCRETE_INPUT(0) +#define SKYRAID_MISSLE_CUSTOM_R1 DISCRETE_INPUT(1) +#define SKYRAID_MISSLE_CUSTOM_R2 DISCRETE_INPUT(2) +#define SKYRAID_MISSLE_CUSTOM_R3 DISCRETE_INPUT(3) +#define SKYRAID_MISSLE_CUSTOM_C DISCRETE_INPUT(4) + +DISCRETE_CLASS_STEP_RESET(skyraid_missle_custom_charge, 2, + double m_v_charge[2]; + double m_v_cap; + double m_exp[2]; +); + +/* the high charge is clamped by the diode to 0.7V above the 5V line */ +#define SKYRAID_MISSLE_CHARGE_PLUS (5.0 + 0.7) + +DISCRETE_STEP( skyraid_missle_custom_charge ) +{ + int in_1 = (SKYRAID_MISSLE_CUSTOM_IN1 == 0) ? 0 : 1; + + /* charge/discharge cap */ + m_v_cap += (m_v_charge[in_1] - m_v_cap) * m_exp[in_1]; + + set_output(0, SKYRAID_MISSLE_CHARGE_PLUS - m_v_cap); +} + +DISCRETE_RESET( skyraid_missle_custom_charge ) +{ + /* everything is based on the input to the O.C. inverter */ + + /* the charging voltage across the cap */ + m_v_charge[0] = 0; + m_v_charge[1] = SKYRAID_MISSLE_CHARGE_PLUS * RES_VOLTAGE_DIVIDER(SKYRAID_MISSLE_CUSTOM_R1 + SKYRAID_MISSLE_CUSTOM_R2, SKYRAID_MISSLE_CUSTOM_R3); + m_v_charge[1] = SKYRAID_MISSLE_CHARGE_PLUS - m_v_charge[1]; + m_v_cap = 0; + + /* precalculate charging exponents */ + /* discharge cap */ + m_exp[0] = RC_CHARGE_EXP(SKYRAID_MISSLE_CUSTOM_R2 * SKYRAID_MISSLE_CUSTOM_C); + /* charge cap */ + m_exp[1] = RC_CHARGE_EXP(RES_2_PARALLEL(SKYRAID_MISSLE_CUSTOM_R1 + SKYRAID_MISSLE_CUSTOM_R2, SKYRAID_MISSLE_CUSTOM_R3) * SKYRAID_MISSLE_CUSTOM_C); + + /* starts at full voltage until cap starts charging */ + set_output(0, SKYRAID_MISSLE_CHARGE_PLUS); +} + + + +DISCRETE_SOUND_START( skyraid ) + /************************************************ + * Input register mapping + ************************************************/ + /* convert the PLANE_SWEEP line to voltage*/ + DISCRETE_INPUTX_LOGIC(SKYRAID_PLANE_SWEEP_EN, DEFAULT_TTL_V_LOGIC_1 * RES_VOLTAGE_DIVIDER(SKYRAID_R25, SKYRAID_R24), 0, 0) + DISCRETE_INPUT_LOGIC(SKYRAID_MISSILE_EN) + DISCRETE_INPUT_LOGIC(SKYRAID_EXPLOSION_EN) + /* convert PLANE_ON into 4066 Ron value of 270 ohms @ 5V */ + DISCRETE_INPUTX_LOGIC(SKYRAID_PLANE_ON__IC_E8, 270, 0, 0) + DISCRETE_INPUT_LOGIC(SKYRAID_ATTRACT_EN) + + /************************************************ + * Noise Generator, Explosion sound + ************************************************/ + /* Note: the noise reset is not emulated 100% accurate */ + /* According to the schematics, Attract only clears the lower 8 bits. */ + /* I may modify the noise module in the future to properly emulate this, */ + /* but you will never hear the difference. */ + /* It only wrong for 8 cycles of the 555 while no sound is being generated. */ + DISCRETE_LFSR_NOISE(SKYRAID_NOISE, /* IC F7, pin 13 */ + 1, /* ENAB */ + SKYRAID_ATTRACT_EN, /* RESET */ + 1.49 / ((SKYRAID_R20 + 2 * SKYRAID_R19) * SKYRAID_C51), /* CLK - 555 astable source */ + 1, 0, 0.5, &skyraid_lfsr) /* AMPL, FEED, BIAS */ + + DISCRETE_LOGIC_NOR(NODE_20, SKYRAID_EXPLOSION_EN, SKYRAID_NOISE) + DISCRETE_RC_CIRCUIT_1(NODE_21, + SKYRAID_EXPLOSION_EN, NODE_20, /* INP0, INP1 */ + RES_2_PARALLEL(SKYRAID_R84, SKYRAID_R85 + SKYRAID_R86), SKYRAID_C68) + DISCRETE_OP_AMP_FILTER(NODE_22, + 1, /* ENAB */ + NODE_21, 0, /* INP0, INP1 */ + DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &skyraid_explosion_filter) /* TYPE,INFO */ + /* IC E10, pin 14 gain and clipping */ + DISCRETE_GAIN(NODE_23, NODE_22, SKYRAID_R119 / SKYRAID_R121 + 1) + DISCRETE_CLAMP(SKYRAID_EXPLOSION_SND, NODE_23, -5, 12.0 - 1.5) + + /************************************************ + * Jet, Plane sound + ************************************************/ + DISCRETE_RCFILTER(NODE_30, /* IC J6, pin 5 */ + SKYRAID_PLANE_SWEEP_EN, /* IN0 */ + RES_2_PARALLEL(SKYRAID_R25, SKYRAID_R24), SKYRAID_C49) + DISCRETE_566(NODE_31, /* IC J6, pin 3 */ + NODE_30, /* VMOD */ + SKYRAID_R18, SKYRAID_C48, + 5, -5, 5, /* VPOS,VNEG,VCHARGE */ + DISC_566_OUT_COUNT_R) + DISCRETE_LOGIC_SHIFT(NODE_32, /* IC H7, J7 output */ + SKYRAID_NOISE, /* IC H7, J7 pins 1 & 2 */ + 1, NODE_31, 16, /* RESET, CLK, SIZE */ + DISC_LOGIC_SHIFT__RESET_L | DISC_LOGIC_SHIFT__LEFT | DISC_CLK_BY_COUNT) + /* move bits together for ease of use */ + DISCRETE_TRANSFORM4(NODE_33, NODE_32, 1, 1 << 14, 2, "01&02/3&|") + DISCRETE_DAC_R1(SKYRAID_PLANE_SND, + NODE_33, /* DATA */ + DEFAULT_TTL_V_LOGIC_1, &skyraid_plane_dac) + DISCRETE_BIT_DECODE(SKYRAID_JET_A_SND, NODE_32, 0, DEFAULT_TTL_V_LOGIC_1) /* IC H7, pin 3 */ + DISCRETE_BIT_DECODE(SKYRAID_JET_B_SND, NODE_32, 15, DEFAULT_TTL_V_LOGIC_1) /* IC J7, pin 13 */ + + /************************************************ + * Missle sound + ************************************************/ + DISCRETE_CUSTOM5(NODE_40, skyraid_missle_custom_charge, SKYRAID_MISSILE_EN, SKYRAID_R12, SKYRAID_R14, SKYRAID_R13, SKYRAID_C44, NULL) + DISCRETE_566(NODE_41, /* IC K6, pin 3 */ + NODE_40, /* VMOD */ + SKYRAID_R16, SKYRAID_C45, + 5, -5, SKYRAID_MISSLE_CHARGE_PLUS, /* VPOS,VNEG,VCHARGE */ + DISC_566_OUT_COUNT_R) + DISCRETE_LOGIC_SHIFT(NODE_42, /* IC K7, L7 output */ + SKYRAID_NOISE, /* IC K7, L7 pins 1 & 2 */ + 1, NODE_41, 16, /* RESET, CLK, SIZE */ + DISC_LOGIC_SHIFT__RESET_L | DISC_LOGIC_SHIFT__LEFT | DISC_CLK_BY_COUNT) + DISCRETE_BIT_DECODE(SKYRAID_MSL_A_SND, NODE_42, 0, DEFAULT_TTL_V_LOGIC_1) /* IC K7, pin 3 */ + DISCRETE_BIT_DECODE(SKYRAID_MSL_B_SND, NODE_42, 15, DEFAULT_TTL_V_LOGIC_1) /* IC L7, pin 13 */ + + /************************************************ + * Final Mix + ************************************************/ + DISCRETE_LOGIC_INVERT(NODE_91, SKYRAID_ATTRACT_EN) + DISCRETE_MIXER6(NODE_92, + NODE_91, /* ENAB */ + SKYRAID_EXPLOSION_SND, + SKYRAID_JET_A_SND, + SKYRAID_JET_B_SND, + SKYRAID_MSL_A_SND, + SKYRAID_MSL_B_SND, + SKYRAID_PLANE_SND, + &skyraid_mixer) + DISCRETE_CRFILTER(NODE_93, + NODE_92, /* IN0 */ + SKYRAID_R122 + RES_6_PARALLEL(SKYRAID_R120, SKYRAID_R32, SKYRAID_R29, SKYRAID_R30, SKYRAID_R31, RES_2_PARALLEL(SKYRAID_R27, SKYRAID_R28)), + SKYRAID_C93) + /* IC E10, pin 1 gain and clipping */ + DISCRETE_GAIN(NODE_94, NODE_93, - SKYRAID_R118 / (SKYRAID_R122 + RES_5_PARALLEL(SKYRAID_R120, SKYRAID_R32, SKYRAID_R29, SKYRAID_R30, SKYRAID_R31))) + DISCRETE_CLAMP(NODE_95, NODE_94, -5, 12.0 - 1.5) + DISCRETE_OUTPUT(NODE_95, 32700.0/8) +DISCRETE_SOUND_END + + +WRITE8_MEMBER(skyraid_state::skyraid_sound_w) +{ + /* BIT0 => PLANE SWEEP */ + /* BIT1 => MISSILE */ + /* BIT2 => EXPLOSION */ + /* BIT3 => START LAMP */ + /* BIT4 => PLANE ON */ + /* BIT5 => ATTRACT */ + + m_discrete->write(space, SKYRAID_PLANE_SWEEP_EN, data & 0x01); + m_discrete->write(space, SKYRAID_MISSILE_EN, data & 0x02); + m_discrete->write(space, SKYRAID_EXPLOSION_EN, data & 0x04); + set_led_status(machine(), 0, !(data & 0x08)); + m_discrete->write(space, SKYRAID_PLANE_ON_EN, data & 0x10); + m_discrete->write(space, SKYRAID_ATTRACT_EN, data & 0x20); +} |