45     for (count = 0; count < numsamples * 2; count++)  in gus_mixvoices()
46         *(bufferpos + count) = 0;       /* clear */  in gus_mixvoices()
50     if (!(GUSregb(GUS4cReset) & 0x01))  /* reset flag active? */  in gus_mixvoices()
53     for (Voice = 0; Voice <= (GUSregb(NumVoices) & 31); Voice++)  in gus_mixvoices()
55         if (GUSvoice(wVSRControl)        &  0x200)  in gus_mixvoices()
56             GUSvoice(wVSRControl)        |= 0x100; /* voice stop request */  in gus_mixvoices()
57         if (GUSvoice(wVSRVolRampControl) &  0x200)  in gus_mixvoices()
58             GUSvoice(wVSRVolRampControl) |= 0x100; /* Volume ramp stop request */  in gus_mixvoices()
59 …if (!(GUSvoice(wVSRControl) & GUSvoice(wVSRVolRampControl) & 0x100)) /* neither voice nor volume c…  in gus_mixvoices()
69             int             PanningPos = (GUSvoice(wVSRPanning) >> 8) & 0xf;  in gus_mixvoices()
72             unsigned int    StartVol32 = (GUSvoice(wVSRVolRampStartVol) & 0xff00) * 32;  in gus_mixvoices()
73             unsigned int    EndVol32   = (GUSvoice(wVSRVolRampEndVol)   & 0xff00) * 32;  in gus_mixvoices()
74 …rement32 = (32 * 16 * (GUSvoice(wVSRVolRampRate) & 0x3f00) >> 8) >> ((((GUSvoice(wVSRVolRampRate) …  in gus_mixvoices()
77             if (GUSvoice(wVSRControl) & 0x4000)  in gus_mixvoices()
79             if (GUSvoice(wVSRVolRampControl) & 0x4000)  in gus_mixvoices()
82             for (sample = 0; sample < numsamples; sample++)  in gus_mixvoices()
85                 if (GUSvoice(wVSRControl) & 0x400)      /* 16bit */  in gus_mixvoices()
87                     int offset = ((CurrPos >> 9) & 0xc0000) + (((CurrPos >> 9) & 0x1ffff) << 1);  in gus_mixvoices()
90                     sample1 = (*adr & 0xff) + (*(adr + 1) * 256);  in gus_mixvoices()
91                     sample2 = (*(adr + 2) & 0xff) + (*(adr + 2 + 1) * 256);  in gus_mixvoices()
95                     int offset = (CurrPos >> 9) & 0xfffff;  in gus_mixvoices()
102 …Volume = ((((Volume32 >> (4 + 5)) & 0xff) + 256) << (Volume32 >> ((4 + 8) + 5))) / 512; /* semi-lo…  in gus_mixvoices()
107                 if (!(GUSvoice(wVSRVolRampControl) & 0x100))  in gus_mixvoices()
110 …if ((GUSvoice(wVSRVolRampControl) & 0x4000) ? (Volume32 <= StartVol32) : (Volume32 >= EndVol32)) /…  in gus_mixvoices()
112                         if (GUSvoice(wVSRVolRampControl) & 0x2000)  in gus_mixvoices()
113 …            GUSvoice(wVSRVolRampControl) |= 0x8000;     /* volramp IRQ enabled? -> IRQ wait flag */  in gus_mixvoices()
114                         if (GUSvoice(wVSRVolRampControl) & 0x800)       /* loop enabled */  in gus_mixvoices()
116                             if (GUSvoice(wVSRVolRampControl) & 0x1000)  /* bidir. loop */  in gus_mixvoices()
118                                 GUSvoice(wVSRVolRampControl) ^= 0x4000; /* toggle dir */  in gus_mixvoices()
122 …Volume32 = (GUSvoice(wVSRVolRampControl) & 0x4000) ? EndVol32 : StartVol32; /* unidir. loop ramp */  in gus_mixvoices()
126                             GUSvoice(wVSRVolRampControl) |= 0x100;  in gus_mixvoices()
128                                 (GUSvoice(wVSRVolRampControl) & 0x4000) ? StartVol32 : EndVol32;  in gus_mixvoices()
132 …         if ((GUSvoice(wVSRVolRampControl) & 0xa000) == 0xa000)  /* volramp IRQ set and enabled? */  in gus_mixvoices()
139                     GUSvoice(wVSRVolRampControl) &= 0x7f00;  in gus_mixvoices()
142                 if (!(GUSvoice(wVSRControl) & 0x100))  in gus_mixvoices()
145 …if ((GUSvoice(wVSRControl) & 0x4000) ? (CurrPos <= LoopStart) : (CurrPos >= LoopEnd)) /* playback …  in gus_mixvoices()
147                         if (GUSvoice(wVSRControl) & 0x2000)  in gus_mixvoices()
148 …                    GUSvoice(wVSRControl) |= 0x8000;       /* voice IRQ enabled -> IRQ wait flag */  in gus_mixvoices()
149                         if (GUSvoice(wVSRControl) & 0x800)         /* loop enabled */  in gus_mixvoices()
151                             if (GUSvoice(wVSRControl) & 0x1000)    /* pingpong loop */  in gus_mixvoices()
153                                 GUSvoice(wVSRControl) ^= 0x4000;   /* toggle dir */  in gus_mixvoices()
157 …               CurrPos = (GUSvoice(wVSRControl) & 0x4000) ? LoopEnd : LoopStart; /* unidir. loop */  in gus_mixvoices()
159                         else if (!(GUSvoice(wVSRVolRampControl) & 0x400))  in gus_mixvoices()
160 …                         GUSvoice(wVSRControl) |= 0x100;        /* loop disabled, rollover check */  in gus_mixvoices()
163 …            if ((GUSvoice(wVSRControl) & 0xa000) == 0xa000)    /* wavetable IRQ set and enabled? */  in gus_mixvoices()
170                     GUSvoice(wVSRControl) &= 0x7f00;  in gus_mixvoices()
180             GUSvoice(wVSRCurrPosLo) = CurrPos & 0xffff;  in gus_mixvoices()
189     int             requestedIRQs = 0;  in gus_irqgen()
200             if (!(GUSregb(TimerDataReg2x9) & 0x40))  in gus_irqgen()
201                 GUSregb(TimerStatus2x8) |= 0xc0; /* maskable bits */  in gus_irqgen()
219             if (!(GUSregb(TimerDataReg2x9) & 0x20))  in gus_irqgen()
220                 GUSregb(TimerStatus2x8) |= 0xa0; /* maskable bits */  in gus_irqgen()
230     if (GUSregb(GUS4cReset) & 0x4) /* synth IRQ enable */  in gus_irqgen()
233             GUSregb(IRQStatReg2x6) |= 0x20;  in gus_irqgen()
235             GUSregb(IRQStatReg2x6) |= 0x40;  in gus_irqgen()