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Phasor: improve odd Phasor logic for AY1 & AY2 chip select (#1192)

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This commit is contained in:
tomcw 2023-03-04 19:38:11 +00:00
parent 34141b0c1d
commit 3b53c882ab
1 changed files with 8 additions and 7 deletions
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15
source/Mockingboard.cpp
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@ -271,16 +271,17 @@ void MockingboardCard::AY8910_Write(BYTE subunit, BYTE ay, BYTE value)
break;
case AY_WRITE: // 6: WRITE TO PSG
if (pMB->isAYLatchedAddressValid[ay])
if (pMB->isChipSelected[ay] && pMB->isAYLatchedAddressValid[ay])
_AYWriteReg(subunit, ay, pMB->nAYCurrentRegister[ay], r6522.GetReg(SY6522::rORA));
// else if invalid then just ignore
if (m_phasorEnable && m_phasorMode == PH_Phasor) // GH#1192
{
if (ay == AY8913_DEVICE_A && pMB->isChipSelected[AY8913_DEVICE_B] && pMB->isAYLatchedAddressValid[AY8913_DEVICE_B])
_AYWriteReg(subunit, AY8913_DEVICE_B, pMB->nAYCurrentRegister[AY8913_DEVICE_B], r6522.GetReg(SY6522::rORA));
else // AY8913_DEVICE_B
pMB->isChipSelected[AY8913_DEVICE_A] = false;
if (ay == AY8913_DEVICE_A)
{
if (pMB->isChipSelected[AY8913_DEVICE_B] && pMB->isAYLatchedAddressValid[AY8913_DEVICE_B])
_AYWriteReg(subunit, AY8913_DEVICE_B, pMB->nAYCurrentRegister[AY8913_DEVICE_B], r6522.GetReg(SY6522::rORA));
}
}
break;
@ -292,18 +293,18 @@ void MockingboardCard::AY8910_Write(BYTE subunit, BYTE ay, BYTE value)
if (r6522.GetReg(SY6522::rORA) <= 0x0F)
{
pMB->nAYCurrentRegister[ay] = r6522.GetReg(SY6522::rORA) & 0x0F;
pMB->isChipSelected[ay] = true;
pMB->isAYLatchedAddressValid[ay] = true;
if (m_phasorEnable && m_phasorMode == PH_Phasor) // GH#1192
{
pMB->isChipSelected[ay] = true;
if (ay == AY8913_DEVICE_A)
{
pMB->isChipSelected[AY8913_DEVICE_B] = false;
}
else // AY8913_DEVICE_B
{
pMB->isChipSelected[AY8913_DEVICE_A] = true;
pMB->nAYCurrentRegister[AY8913_DEVICE_A] = pMB->nAYCurrentRegister[AY8913_DEVICE_B];
pMB->isAYLatchedAddressValid[AY8913_DEVICE_A] = true;
}