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Add LFSR feedback bits, 1-bit noise and wave mix mode macros. I hope I am done with main macros now

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This commit is contained in:
LTVA1 2024-08-05 15:50:48 +03:00
parent 2fb518231a
commit bfbc92e1f3
6 changed files with 145 additions and 9 deletions
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44
src/engine/platform/sound/sid3.c
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@ -3433,6 +3433,50 @@ void sid3_write(SID3* sid3, uint16_t address, uint8_t data)
}
break;
}
case SID3_REGISTER_NOISE_LFSR_HIGHEST:
{
if(channel != SID3_NUM_CHANNELS - 1)
{
sid3->chan[channel].lfsr_taps &= 0x00ffffff;
sid3->chan[channel].lfsr_taps |= (uint32_t)data << 24;
sid3->chan[channel].lfsr_taps &= 0x3fffffff; //30 bits limit
}
break;
}
case SID3_REGISTER_NOISE_LFSR_HIGH:
{
if(channel != SID3_NUM_CHANNELS - 1)
{
sid3->chan[channel].lfsr_taps &= 0xff00ffff;
sid3->chan[channel].lfsr_taps |= data << 16;
sid3->chan[channel].lfsr_taps &= 0x3fffffff;
}
break;
}
case SID3_REGISTER_NOISE_LFSR_MID:
{
if(channel != SID3_NUM_CHANNELS - 1)
{
sid3->chan[channel].lfsr_taps &= 0xffff00ff;
sid3->chan[channel].lfsr_taps |= data << 8;
sid3->chan[channel].lfsr_taps &= 0x3fffffff;
}
break;
}
case SID3_REGISTER_NOISE_LFSR_LOW:
{
if(channel != SID3_NUM_CHANNELS - 1)
{
sid3->chan[channel].lfsr_taps &= 0xffffff00;
sid3->chan[channel].lfsr_taps |= data;
sid3->chan[channel].lfsr_taps &= 0x3fffffff;
}
break;
}
default: break;
}
}