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ymfm_opn: apparently there is no internal flag when latch was written

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hap 2025-01-30 14:49:27 +01:00
parent a56c5f8afa
commit 802bce33eb
1 changed files with 4 additions and 5 deletions
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9
3rdparty/ymfm/src/ymfm_opn.cpp vendored
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@ -155,14 +155,13 @@ bool opn_registers_base<IsOpnA>::write(uint16_t index, uint8_t data, uint32_t &c
// writes to the upper half just latch (only low 6 bits matter)
if (bitfield(index, 2))
m_regdata[latchindex] = data | 0x80;
m_regdata[latchindex] = data & 0x3f;
// writes to the lower half only commit if the latch is there
else if (bitfield(m_regdata[latchindex], 7))
// writes to the lower half also apply said latch
else
{
m_regdata[index] = data;
m_regdata[index | 4] = m_regdata[latchindex] & 0x3f;
m_regdata[latchindex] = 0;
m_regdata[index | 4] = m_regdata[latchindex];
}
return false;
}