1 /***************************************************************************
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2 registers.c - description
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4 begin : Wed May 15 2002
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5 copyright : (C) 2002 by Pete Bernert
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6 email : BlackDove@addcom.de
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7 ***************************************************************************/
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8 /***************************************************************************
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10 * This program is free software; you can redistribute it and/or modify *
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11 * it under the terms of the GNU General Public License as published by *
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12 * the Free Software Foundation; either version 2 of the License, or *
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13 * (at your option) any later version. See also the license.txt file for *
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14 * additional informations. *
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16 ***************************************************************************/
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20 #define _IN_REGISTERS
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22 #include "externals.h"
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23 #include "registers.h"
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26 // adsr time values (in ms) by James Higgs ... see the end of
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27 // the adsr.c source for details
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29 #define ATTACK_MS 514L
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30 #define DECAYHALF_MS 292L
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31 #define DECAY_MS 584L
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32 #define SUSTAIN_MS 450L
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33 #define RELEASE_MS 446L
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36 // we have a timebase of 1.020408f ms, not 1 ms... so adjust adsr defines
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37 #define ATTACK_MS 494L
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38 #define DECAYHALF_MS 286L
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39 #define DECAY_MS 572L
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40 #define SUSTAIN_MS 441L
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41 #define RELEASE_MS 437L
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43 static void SoundOn(int start,int end,unsigned short val);
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44 static void SoundOff(int start,int end,unsigned short val);
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45 static void FModOn(int start,int end,unsigned short val);
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46 static void NoiseOn(int start,int end,unsigned short val);
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47 static void SetVolumeL(unsigned char ch,short vol);
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48 static void SetVolumeR(unsigned char ch,short vol);
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49 static void SetPitch(int ch,unsigned short val);
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50 static void ReverbOn(int start,int end,unsigned short val);
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52 ////////////////////////////////////////////////////////////////////////
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53 // WRITE REGISTERS: called by main emu
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54 ////////////////////////////////////////////////////////////////////////
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56 void CALLBACK SPUwriteRegister(unsigned long reg, unsigned short val)
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58 const unsigned long r=reg&0xfff;
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59 regArea[(r-0xc00)>>1] = val;
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61 if(r>=0x0c00 && r<0x0d80) // some channel info?
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63 int ch=(r>>4)-0xc0; // calc channel
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66 //------------------------------------------------// r volume
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68 SetVolumeL((unsigned char)ch,val);
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70 //------------------------------------------------// l volume
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72 SetVolumeR((unsigned char)ch,val);
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74 //------------------------------------------------// pitch
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78 //------------------------------------------------// start
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80 // taken from regArea later
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82 //------------------------------------------------// level with pre-calcs
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85 const unsigned long lval=val;
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86 //---------------------------------------------//
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87 s_chan[ch].ADSRX.AttackModeExp=(lval&0x8000)?1:0;
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88 s_chan[ch].ADSRX.AttackRate=(lval>>8) & 0x007f;
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89 s_chan[ch].ADSRX.DecayRate=(lval>>4) & 0x000f;
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90 s_chan[ch].ADSRX.SustainLevel=lval & 0x000f;
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91 //---------------------------------------------//
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93 if(!iDebugMode) break;
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94 //---------------------------------------------// stuff below is only for debug mode
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96 s_chan[ch].ADSR.AttackModeExp=(lval&0x8000)?1:0; //0x007f
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98 lx=(((lval>>8) & 0x007f)>>2); // attack time to run from 0 to 100% volume
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99 lx=min(31,lx); // no overflow on shift!
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103 if(lx<2147483) lx=(lx*ATTACK_MS)/10000L; // another overflow check
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104 else lx=(lx/10000L)*ATTACK_MS;
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107 s_chan[ch].ADSR.AttackTime=lx;
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109 s_chan[ch].ADSR.SustainLevel= // our adsr vol runs from 0 to 1024, so scale the sustain level
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110 (1024*((lval) & 0x000f))/15;
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112 lx=(lval>>4) & 0x000f; // decay:
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113 if(lx) // our const decay value is time it takes from 100% to 0% of volume
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115 lx = ((1<<(lx))*DECAY_MS)/10000L;
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118 s_chan[ch].ADSR.DecayTime = // so calc how long does it take to run from 100% to the wanted sus level
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119 (lx*(1024-s_chan[ch].ADSR.SustainLevel))/1024;
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123 //------------------------------------------------// adsr times with pre-calcs
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126 const unsigned long lval=val;
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128 //----------------------------------------------//
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129 s_chan[ch].ADSRX.SustainModeExp = (lval&0x8000)?1:0;
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130 s_chan[ch].ADSRX.SustainIncrease= (lval&0x4000)?0:1;
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131 s_chan[ch].ADSRX.SustainRate = (lval>>6) & 0x007f;
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132 s_chan[ch].ADSRX.ReleaseModeExp = (lval&0x0020)?1:0;
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133 s_chan[ch].ADSRX.ReleaseRate = lval & 0x001f;
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134 //----------------------------------------------//
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136 if(!iDebugMode) break;
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137 //----------------------------------------------// stuff below is only for debug mode
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139 s_chan[ch].ADSR.SustainModeExp = (lval&0x8000)?1:0;
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140 s_chan[ch].ADSR.ReleaseModeExp = (lval&0x0020)?1:0;
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142 lx=((((lval>>6) & 0x007f)>>2)); // sustain time... often very high
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143 lx=min(31,lx); // values are used to hold the volume
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144 if(lx) // until a sound stop occurs
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145 { // the highest value we reach (due to
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146 lx = (1<<lx); // overflow checking) is:
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147 if(lx<2147483) lx=(lx*SUSTAIN_MS)/10000L; // 94704 seconds = 1578 minutes = 26 hours...
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148 else lx=(lx/10000L)*SUSTAIN_MS; // should be enuff... if the stop doesn't
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149 if(!lx) lx=1; // come in this time span, I don't care :)
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151 s_chan[ch].ADSR.SustainTime = lx;
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153 lx=(lval & 0x001f);
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154 s_chan[ch].ADSR.ReleaseVal =lx;
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155 if(lx) // release time from 100% to 0%
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156 { // note: the release time will be
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157 lx = (1<<lx); // adjusted when a stop is coming,
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158 if(lx<2147483) lx=(lx*RELEASE_MS)/10000L; // so at this time the adsr vol will
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159 else lx=(lx/10000L)*RELEASE_MS; // run from (current volume) to 0%
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162 s_chan[ch].ADSR.ReleaseTime=lx;
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164 if(lval & 0x4000) // add/dec flag
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165 s_chan[ch].ADSR.SustainModeDec=-1;
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166 else s_chan[ch].ADSR.SustainModeDec=1;
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170 //------------------------------------------------// adsr volume... mmm have to investigate this
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173 //------------------------------------------------//
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175 s_chan[ch].pLoop=spuMemC+((val&~1)<<3);
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176 if(s_chan[ch].bJump)
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177 // real machine would be most likely still doing the last block and use new value for the jump;
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178 // but we decode ahead a bit and already did the jump part, so compensate for that now.
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179 s_chan[ch].pCurr=s_chan[ch].pLoop;
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181 //------------------------------------------------//
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189 //-------------------------------------------------//
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191 spuAddr = (unsigned long) val<<3;
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193 //-------------------------------------------------//
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195 spuMem[spuAddr>>1] = val;
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197 if(spuAddr>0x7ffff) spuAddr=0;
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199 //-------------------------------------------------//
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201 if(!(spuCtrl & CTRL_IRQ))
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202 spuStat&=~STAT_IRQ;
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205 //-------------------------------------------------//
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207 spuStat=val & 0xf800;
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209 //-------------------------------------------------//
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210 case H_SPUReverbAddr:
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211 if(val==0xFFFF || val<=0x200)
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212 {rvb.StartAddr=rvb.CurrAddr=0;}
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215 const long iv=(unsigned long)val<<2;
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216 if(rvb.StartAddr!=iv)
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218 rvb.StartAddr=(unsigned long)val<<2;
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219 rvb.CurrAddr=rvb.StartAddr;
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224 //-------------------------------------------------//
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227 pSpuIrq=spuMemC+(((unsigned long) val<<3)&~0xf);
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229 //-------------------------------------------------//
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233 //-------------------------------------------------//
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237 //-------------------------------------------------//
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241 //auxprintf("EL %d\n",val);
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243 //-------------------------------------------------//
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245 //auxprintf("ER %d\n",val);
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247 //-------------------------------------------------//
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249 //auxprintf("ML %d\n",val);
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251 //-------------------------------------------------//
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253 //auxprintf("MR %d\n",val);
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255 //-------------------------------------------------//
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257 //auxprintf("M0 %04x\n",val);
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259 //-------------------------------------------------//
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261 //auxprintf("M1 %04x\n",val);
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264 //-------------------------------------------------//
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268 //-------------------------------------------------//
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270 SoundOn(16,24,val);
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272 //-------------------------------------------------//
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274 SoundOff(0,16,val);
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276 //-------------------------------------------------//
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278 SoundOff(16,24,val);
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280 //-------------------------------------------------//
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282 iLeftXAVol=val & 0x7fff;
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283 if(cddavCallback) cddavCallback(0,val);
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286 iRightXAVol=val & 0x7fff;
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287 if(cddavCallback) cddavCallback(1,val);
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289 //-------------------------------------------------//
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293 //-------------------------------------------------//
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297 //-------------------------------------------------//
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301 //-------------------------------------------------//
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303 NoiseOn(16,24,val);
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305 //-------------------------------------------------//
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307 ReverbOn(0,16,val);
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309 //-------------------------------------------------//
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311 ReverbOn(16,24,val);
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313 //-------------------------------------------------//
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314 case H_Reverb+0 : rvb.FB_SRC_A=val*4; break;
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315 case H_Reverb+2 : rvb.FB_SRC_B=val*4; break;
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316 case H_Reverb+4 : rvb.IIR_ALPHA=(short)val; break;
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317 case H_Reverb+6 : rvb.ACC_COEF_A=(short)val; break;
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318 case H_Reverb+8 : rvb.ACC_COEF_B=(short)val; break;
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319 case H_Reverb+10 : rvb.ACC_COEF_C=(short)val; break;
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320 case H_Reverb+12 : rvb.ACC_COEF_D=(short)val; break;
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321 case H_Reverb+14 : rvb.IIR_COEF=(short)val; break;
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322 case H_Reverb+16 : rvb.FB_ALPHA=(short)val; break;
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323 case H_Reverb+18 : rvb.FB_X=(short)val; break;
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324 case H_Reverb+20 : rvb.IIR_DEST_A0=val*4; break;
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325 case H_Reverb+22 : rvb.IIR_DEST_A1=val*4; break;
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326 case H_Reverb+24 : rvb.ACC_SRC_A0=val*4; break;
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327 case H_Reverb+26 : rvb.ACC_SRC_A1=val*4; break;
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328 case H_Reverb+28 : rvb.ACC_SRC_B0=val*4; break;
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329 case H_Reverb+30 : rvb.ACC_SRC_B1=val*4; break;
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330 case H_Reverb+32 : rvb.IIR_SRC_A0=val*4; break;
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331 case H_Reverb+34 : rvb.IIR_SRC_A1=val*4; break;
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332 case H_Reverb+36 : rvb.IIR_DEST_B0=val*4; break;
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333 case H_Reverb+38 : rvb.IIR_DEST_B1=val*4; break;
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334 case H_Reverb+40 : rvb.ACC_SRC_C0=val*4; break;
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335 case H_Reverb+42 : rvb.ACC_SRC_C1=val*4; break;
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336 case H_Reverb+44 : rvb.ACC_SRC_D0=val*4; break;
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337 case H_Reverb+46 : rvb.ACC_SRC_D1=val*4; break;
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338 case H_Reverb+48 : rvb.IIR_SRC_B1=val*4; break;
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339 case H_Reverb+50 : rvb.IIR_SRC_B0=val*4; break;
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340 case H_Reverb+52 : rvb.MIX_DEST_A0=val*4; break;
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341 case H_Reverb+54 : rvb.MIX_DEST_A1=val*4; break;
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342 case H_Reverb+56 : rvb.MIX_DEST_B0=val*4; break;
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343 case H_Reverb+58 : rvb.MIX_DEST_B1=val*4; break;
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344 case H_Reverb+60 : rvb.IN_COEF_L=(short)val; break;
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345 case H_Reverb+62 : rvb.IN_COEF_R=(short)val; break;
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348 if ((r & ~0x3f) == H_Reverb)
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349 rvb.dirty = 1; // recalculate on next update
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354 ////////////////////////////////////////////////////////////////////////
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355 // READ REGISTER: called by main emu
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356 ////////////////////////////////////////////////////////////////////////
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358 unsigned short CALLBACK SPUreadRegister(unsigned long reg)
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360 const unsigned long r=reg&0xfff;
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364 if(r>=0x0c00 && r<0x0d80)
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368 case 12: // get adsr vol
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370 const int ch=(r>>4)-0xc0;
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371 if(dwNewChannel&(1<<ch)) return 1; // we are started, but not processed? return 1
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372 if((dwChannelOn&(1<<ch)) && // same here... we haven't decoded one sample yet, so no envelope yet. return 1 as well
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373 !s_chan[ch].ADSRX.EnvelopeVol)
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375 return (unsigned short)(s_chan[ch].ADSRX.EnvelopeVol>>16);
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378 case 14: // get loop address
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380 const int ch=(r>>4)-0xc0;
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381 return (unsigned short)((s_chan[ch].pLoop-spuMemC)>>3);
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395 return (unsigned short)(spuAddr>>3);
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399 unsigned short s=spuMem[spuAddr>>1];
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401 if(spuAddr>0x7ffff) spuAddr=0;
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409 // return IsSoundOn(0,16);
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412 // return IsSoundOn(16,24);
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416 return regArea[(r-0xc00)>>1];
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419 ////////////////////////////////////////////////////////////////////////
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420 // SOUND ON register write
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421 ////////////////////////////////////////////////////////////////////////
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423 static void SoundOn(int start,int end,unsigned short val)
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427 for(ch=start;ch<end;ch++,val>>=1) // loop channels
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429 if((val&1) && regAreaGet(ch,6)) // mmm... start has to be set before key on !?!
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431 // do this here, not in StartSound
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432 // - fixes fussy timing issues
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433 s_chan[ch].bStop=0;
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434 s_chan[ch].pCurr=spuMemC+((regAreaGet(ch,6)&~1)<<3); // must be block aligned
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435 s_chan[ch].pLoop=spuMemC+((regAreaGet(ch,14)&~1)<<3);
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436 s_chan[ch].bJump=0;
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438 dwNewChannel|=(1<<ch); // bitfield for faster testing
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439 dwChannelOn|=1<<ch;
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440 dwChannelDead&=~(1<<ch);
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445 ////////////////////////////////////////////////////////////////////////
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446 // SOUND OFF register write
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447 ////////////////////////////////////////////////////////////////////////
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449 static void SoundOff(int start,int end,unsigned short val)
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452 for(ch=start;ch<end;ch++,val>>=1) // loop channels
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454 if(val&1) // && s_chan[i].bOn) mmm...
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456 s_chan[ch].bStop=1;
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458 // Jungle Book - Rhythm 'n Groove
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459 // - turns off buzzing sound (loop hangs)
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460 dwNewChannel &= ~(1<<ch);
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465 ////////////////////////////////////////////////////////////////////////
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466 // FMOD register write
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467 ////////////////////////////////////////////////////////////////////////
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469 static void FModOn(int start,int end,unsigned short val)
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473 for(ch=start;ch<end;ch++,val>>=1) // loop channels
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475 if(val&1) // -> fmod on/off
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479 s_chan[ch].bFMod=1; // --> sound channel
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480 s_chan[ch-1].bFMod=2; // --> freq channel
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485 s_chan[ch].bFMod=0; // --> turn off fmod
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486 if(ch>0&&s_chan[ch-1].bFMod==2)
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487 s_chan[ch-1].bFMod=0;
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492 ////////////////////////////////////////////////////////////////////////
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493 // NOISE register write
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494 ////////////////////////////////////////////////////////////////////////
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496 static void NoiseOn(int start,int end,unsigned short val)
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500 for(ch=start;ch<end;ch++,val>>=1) // loop channels
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502 s_chan[ch].bNoise=val&1; // -> noise on/off
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506 ////////////////////////////////////////////////////////////////////////
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507 // LEFT VOLUME register write
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508 ////////////////////////////////////////////////////////////////////////
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510 // please note: sweep and phase invert are wrong... but I've never seen
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513 static void SetVolumeL(unsigned char ch,short vol) // LEFT VOLUME
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515 if(vol&0x8000) // sweep?
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517 short sInc=1; // -> sweep up?
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518 if(vol&0x2000) sInc=-1; // -> or down?
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519 if(vol&0x1000) vol^=0xffff; // -> mmm... phase inverted? have to investigate this
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520 vol=((vol&0x7f)+1)/2; // -> sweep: 0..127 -> 0..64
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521 vol+=vol/(2*sInc); // -> HACK: we don't sweep right now, so we just raise/lower the volume by the half!
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526 if(vol&0x4000) // -> mmm... phase inverted? have to investigate this
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528 vol=0x3fff-(vol&0x3fff);
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532 s_chan[ch].iLeftVolume=vol; // store volume
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535 ////////////////////////////////////////////////////////////////////////
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536 // RIGHT VOLUME register write
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537 ////////////////////////////////////////////////////////////////////////
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539 static void SetVolumeR(unsigned char ch,short vol) // RIGHT VOLUME
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541 if(vol&0x8000) // comments... see above :)
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544 if(vol&0x2000) sInc=-1;
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545 if(vol&0x1000) vol^=0xffff;
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546 vol=((vol&0x7f)+1)/2;
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552 if(vol&0x4000) //vol=vol^=0xffff;
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553 vol=0x3fff-(vol&0x3fff);
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558 s_chan[ch].iRightVolume=vol;
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561 ////////////////////////////////////////////////////////////////////////
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562 // PITCH register write
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563 ////////////////////////////////////////////////////////////////////////
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565 static void SetPitch(int ch,unsigned short val) // SET PITCH
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568 if(val>0x3fff) NP=0x3fff; // get pitch val
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571 s_chan[ch].iRawPitch=NP;
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572 s_chan[ch].sinc=(NP<<4)|8;
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573 if(iUseInterpolation==1) s_chan[ch].SB[32]=1; // -> freq change in simple interpolation mode: set flag
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576 ////////////////////////////////////////////////////////////////////////
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577 // REVERB register write
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578 ////////////////////////////////////////////////////////////////////////
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580 static void ReverbOn(int start,int end,unsigned short val)
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584 for(ch=start;ch<end;ch++,val>>=1) // loop channels
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586 s_chan[ch].bReverb=val&1; // -> reverb on/off
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