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more partial FDS audio fixes 

fixes damage sounds in kid icarus and zelda II

completely fixes sword sounds in zelda 1

need more test cases
This commit is contained in:
alyosha-tas 2016-09-10 12:52:06 -04:00 committed by GitHub
parent addaf2fa91
commit 26e300f8da
1 changed files with 40 additions and 11 deletions
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49
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/FDS/FDSAudio.cs
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@ -146,6 +146,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
int latchedoutput;
int temp_convert;//for conversion to one's complement only
Action<int> SendDiff;
public FDSAudio(Action<int> SendDiff)
@ -248,10 +250,22 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
case 6: sweepbias -= 2; break;
case 7: sweepbias -= 1; break;
}
sweepbias &= 0x7f;
// we need to make this a signed integer in ONES' COMPLEMENT format
// C# is 2's complement, so let's do it manually
if (sweepbias>63)
{
temp_convert = sweepbias - 63;
sweepbias = (-63) + temp_convert - 1;
} else if (sweepbias<-63)
{
temp_convert = (-sweepbias) - 63;
sweepbias = 63 - temp_convert + 1;
}
//sweepbias &= 0x7f;
// sign extend
sweepbias <<= 25;
sweepbias >>= 25;
//sweepbias <<= 25;
//sweepbias >>= 25;
modtablepos &= 63;
CalcMod();
}
@ -284,10 +298,10 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
case 0x4080:
r4080_6 = (value & 0x40) != 0;
r4080_7 = (value & 0x80) != 0;
volumeclock = 0;
volumespd = value & 63;
if (r4080_7) // envelope is off, so written value gets sent to gain directly
volumegain = value & 63;
else // envelope is on; written value is speed of change
volumespd = value & 63;
break;
case 0x4082:
frequency &= 0xf00;
@ -298,18 +312,34 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
frequency |= value << 8 & 0xf00;
r4083_6 = (value & 0x40) != 0;
r4083_7 = (value & 0x80) != 0;
if (r4083_7)
waverampos = 0;
if (r4083_6)
{
volumeclock = 0;
sweepclock = 0;
}
break;
case 0x4084:
sweepspd = value & 63;
r4084_6 = (value & 0x40) != 0;
r4084_7 = (value & 0x80) != 0;
sweepclock = 0;
if (r4084_7)
sweepgain = value & 63;
break;
case 0x4085:
//modtablepos = 0; // this doesn't happen, ever!!
sweepbias = value & 0x7f;
// sign extend
sweepbias <<= 25;
sweepbias >>= 25;
// we need to make this a signed integer in ONES' COMPLEMENT format
// C# is 2's complement, so let's do it manually
if ((value&0x40)==0x40)
{
sweepbias = sweepbias & 0x3f;
sweepbias = (-1) * (63 - sweepbias);
}
Console.WriteLine(value & 0x7F);
Console.WriteLine(sweepbias);
break;
case 0x4086:
modfreq &= 0xf00;
@ -326,7 +356,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
break;
case 0x4088:
// write twice into virtual 64 unit buffer
//Buffer.BlockCopy(modtable, 2, modtable, 0, 62);
modtable[modtablepos] = (byte)(value & 7);
modtablepos++;
modtablepos &= 63;