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Fixed AY-3-8912 overflow bug

This commit is contained in:
Asnivor 2018-03-16 08:08:35 +00:00
parent 396f875ac2
commit 4ecb247c17
1 changed files with 18 additions and 18 deletions
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36
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/SoundOuput/AYChip.cs
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@ -650,32 +650,32 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
_countE = 0;
_eState += +_eDirection;
var mask = (1 << _registers[AY_E_SHAPE]);
if ((_eState & ~31) != 0)
{
var mask = (1 << _registers[AY_E_SHAPE]);
if ((mask & ((1 << 0) | (1 << 1) | (1 << 2) |
(1 << 3) | (1 << 4) | (1 << 5) | (1 << 6) |
(1 << 7) | (1 << 9) | (1 << 15))) != 0)
{
_eState = _eDirection = 0;
}
}
else if ((mask & ((1 << 8) | (1 << 12))) != 0)
{
_eState &= 31;
}
else if ((mask & ((1 << 10) | (1 << 14))) != 0)
{
_eDirection = -_eDirection;
_eState += _eDirection;
}
else
{
// 11,13
_eState = 31;
_eDirection = 0;
}
else if ((mask & ((1 << 8) | (1 << 12))) != 0)
{
_eState &= 31;
}
else if ((mask & ((1 << 10) | (1 << 14))) != 0)
{
_eDirection = -_eDirection;
_eState += _eDirection;
}
else
{
// 11,13
_eState = 31;
_eDirection = 0;
}
}
}
}