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MB/Phasor: SSI263

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. extend for 6522 PCR CA1 input control=0, which sets IFR.b1 on phoneme complete
This commit is contained in:
tomcw 2020-04-26 10:10:39 +01:00
parent 389b6e6d23
commit f201294451
1 changed files with 7 additions and 4 deletions
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11
source/Mockingboard.cpp
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@ -1037,11 +1037,14 @@ static DWORD WINAPI SSI263Thread(LPVOID lpParameter)
if (pMB->SpeechChip.CurrentMode != MODE_IRQ_DISABLED)
{
if (pMB->sy6522.PCR == 0x0C && (!g_bPhasorEnable || (g_bPhasorEnable && g_phasorMode == PH_Mockingboard)))
if (!g_bPhasorEnable || (g_bPhasorEnable && g_phasorMode == PH_Mockingboard))
{
UpdateIFR(pMB, 0, IxR_PERIPHERAL);
pMB->SpeechChip.CurrentMode &= ~1; // Clear SSI263's D7 pin (cleared by 6522's PCR CA1/CA2 handshake)
// NB. Don't set CTL=1, as Mockingboard(SMS) speech doesn't work (sets MODE_IRQ_DISABLED mode)
if ((pMB->sy6522.PCR & 1) == 0) // CA1 Latch/Input = 0 (Negative active edge)
UpdateIFR(pMB, 0, IxR_PERIPHERAL);
if (pMB->sy6522.PCR == 0x0C) // CA2 Control = b#110 (Low output)
pMB->SpeechChip.CurrentMode &= ~1; // Clear SSI263's D7 pin (cleared by 6522's PCR CA1/CA2 handshake)
// NB. Don't set CTL=1, as Mockingboard(SMS) speech doesn't work (it sets MODE_IRQ_DISABLED mode during ISR)
//pMB->SpeechChip.CtrlArtAmp |= CONTROL_MASK; // 6522's CA2 sets Power Down mode (pin 18), which sets Control bit
}
else if (g_bPhasorEnable && g_phasorMode == PH_Phasor) // Phasor's SSI263 IRQ (A/!R) line is *also* wired directly to the 6502's IRQ (as well as the 6522's CA1)