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Phasor: use correct primary AY8913 for Phasor & MB modes (now checked in mb-audit v1.2)

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This commit is contained in:
tomcw 2022-05-21 11:15:01 +01:00
parent 961625721b
commit 5236bb95b6
1 changed files with 5 additions and 3 deletions
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8
source/Mockingboard.cpp
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@ -321,12 +321,14 @@ static void WriteToORB(BYTE device)
#else
if (g_bPhasorEnable)
{
int nAY_CS = (g_phasorMode == PH_Phasor) ? (~(value >> 3) & 3) : 1;
const int kAY0 = 2; // bit4=0 (active low) selects the 1st AY8913, ie. the only AY8913 in Mockingboard mode (confirmed on real Phasor h/w)
const int kAY1 = 1; // bit3=0 (active low) selects the 2nd AY8913 attached to this 6522 (unavailable in Mockingboard mode)
int nAY_CS = (g_phasorMode == PH_Phasor) ? (~(value >> 3) & 3) : kAY0;
if (nAY_CS & 1)
if (nAY_CS & kAY0)
AY8910_Write(device, value, 0);
if (nAY_CS & 2)
if (nAY_CS & kAY1)
AY8910_Write(device, value, 1);
}
else