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Support MegaAudio card for testing mb-audit (PR #1211)

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Differences compared to Mockingboard:
. TIMER1 underflows to $FFFE before it's reloaded with latch.
. TIMER1's LATCH=$0000 gets interpreted as $FFFF.
. Partial TIMER2 support: IFR.T2 gets set on underflow. But T2 reads as 0x00FF.
. AY register reads are unsupported (always read as 0).

Config->Sound: show 'MEGA Audio' in drop-down menus only if it was specified on the cmd line.
This commit is contained in:
TomCh 2023-04-12 18:19:18 +01:00 committed by GitHub
parent 33185f3f2b
commit 273d07d83f
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GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 131 additions and 29 deletions
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49
source/6522.cpp
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@ -110,7 +110,16 @@ USHORT SY6522::SetTimerSyncEvent(BYTE reg, USHORT timerLatch)
if (syncEvent->m_active)
g_SynchronousEventMgr.Remove(syncEvent->m_id);
syncEvent->SetCycles(timerLatch + kExtraTimerCycles + opcodeCycleAdjust);
if (m_isMegaAudio)
{
if (reg == rT1CH && timerLatch == 0x0000)
timerLatch = 0xFFFF; // MegaAudio && T1.LATCH=0: use 0xFFFF (or maybe 0x10000?)
syncEvent->SetCycles(timerLatch + kExtraMegaAudioTimerCycles + opcodeCycleAdjust); // MegaAudio asserts IRQ 1 cycle late!
}
else
{
syncEvent->SetCycles(timerLatch + kExtraTimerCycles + opcodeCycleAdjust);
}
g_SynchronousEventMgr.Insert(syncEvent);
// It doesn't matter if this overflows (ie. >0xFFFF), since on completion of current opcode it'll be corrected
@ -260,10 +269,21 @@ bool SY6522::CheckTimerUnderflow(USHORT& counter, int& timerIrqDelay, const USHO
if (oldTimer >= 0 && timer < 0) // Underflow occurs for 0x0000 -> 0xFFFF
{
if (timer <= -2) // TIMER = 0xFFFE (or less)
timerIrq = true;
else // TIMER = 0xFFFF
timerIrqDelay = 1; // ...so 1 cycle until IRQ
if (m_isMegaAudio)
{
if (timer <= -3) // TIMER = 0xFFFD (or less)
timerIrq = true;
else // TIMER = 0xFFFF or 0xFFFE
timerIrqDelay = 1; // ...so 1 or 2 cycles until IRQ
}
else
{
if (timer <= -2) // TIMER = 0xFFFE (or less)
timerIrq = true;
else // TIMER = 0xFFFF
timerIrqDelay = 1; // ...so 1 cycle until IRQ
}
}
return timerIrq;
@ -272,10 +292,19 @@ bool SY6522::CheckTimerUnderflow(USHORT& counter, int& timerIrqDelay, const USHO
int SY6522::OnTimer1Underflow(USHORT& counter)
{
int timer = (int)(short)(counter);
while (timer < -1)
timer += (m_regs.TIMER1_LATCH.w + kExtraTimerCycles); // GH#651: account for underflowed cycles / GH#652: account for extra 2 cycles
if (m_isMegaAudio)
{
const UINT timerLatch = m_regs.TIMER1_LATCH.w ? m_regs.TIMER1_LATCH.w : 0xFFFF; // MegaAudio && T1.LATCH=0: use 0xFFFF (or maybe 0x10000?)
while (timer < -2)
timer += (timerLatch + kExtraMegaAudioTimerCycles); // MegaAudio asserts IRQ 1 cycle late!
}
else
{
while (timer < -1)
timer += (m_regs.TIMER1_LATCH.w + kExtraTimerCycles); // GH#651: account for underflowed cycles / GH#652: account for extra 2 cycles
}
counter = (USHORT)timer;
return (timer == -1) ? 1 : 0; // timer1IrqDelay
return (timer < 0) ? 1 : 0; // timer1IrqDelay
}
//-----------------------------------------------------------------------------
@ -349,9 +378,11 @@ BYTE SY6522::Read(BYTE nReg)
case 0x08: // TIMER2L
nValue = GetTimer2Counter(nReg) & 0xff;
UpdateIFR(IxR_TIMER2);
if (m_isMegaAudio) nValue = 0xFF; // MegaAudio: Timer2 just reads as $00FF
break;
case 0x09: // TIMER2H
nValue = GetTimer2Counter(nReg) >> 8;
if (m_isMegaAudio) nValue = 0x00; // MegaAudio: Timer2 just reads as $00FF
break;
case 0x0a: // SERIAL_SHIFT
break;
@ -370,6 +401,8 @@ BYTE SY6522::Read(BYTE nReg)
break;
case 0x0e: // IER
nValue = 0x80 | m_regs.IER; // GH#567
if (m_isMegaAudio)
nValue &= 0x7F;
break;
case 0x0f: // ORA_NO_HS
nValue = m_regs.ORA;

5
source/6522.h
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@ -3,7 +3,7 @@
class SY6522
{
public:
SY6522(UINT slot) : m_slot(slot)
SY6522(UINT slot, bool isMegaAudio) : m_slot(slot), m_isMegaAudio(isMegaAudio)
{
for (UINT i = 0; i < kNumTimersPer6522; i++)
m_syncEvent[i] = NULL;
@ -143,4 +143,7 @@ private:
class SyncEvent* m_syncEvent[kNumTimersPer6522];
UINT m_slot;
bool m_isMegaAudio;
static const UINT kExtraMegaAudioTimerCycles = kExtraTimerCycles + 1;
};

6
source/Card.cpp
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@ -159,6 +159,8 @@ std::string Card::GetCardName(const SS_CARDTYPE cardType)
return VidHDCard::GetSnapshotCardName();
case CT_Uthernet2:
return Uthernet2::GetSnapshotCardName();
case CT_MegaAudio:
return MockingboardCard::GetSnapshotCardNameMegaAudio();
default:
return "Unknown";
}
@ -230,6 +232,10 @@ SS_CARDTYPE Card::GetCardType(const std::string & card)
{
return CT_Uthernet2;
}
else if (card == MockingboardCard::GetSnapshotCardNameMegaAudio())
{
return CT_MegaAudio;
}
else
{
throw std::runtime_error("Slots: Unknown card: " + card); // todo: don't throw - just ignore & continue

1
source/Card.h
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@ -25,6 +25,7 @@ enum SS_CARDTYPE
CT_SNESMAX, // 2 port Nintendo NES/SNES controller serial interface card
CT_VidHD,
CT_Uthernet2,
CT_MegaAudio, // Soundcard
};
enum SLOTS { SLOT0=0, SLOT1, SLOT2, SLOT3, SLOT4, SLOT5, SLOT6, SLOT7, NUM_SLOTS, SLOT_AUX, GAME_IO_CONNECTOR };

1
source/CardManager.cpp
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@ -66,6 +66,7 @@ void CardManager::InsertInternal(UINT slot, SS_CARDTYPE type)
m_slot[slot] = m_pSSC = new CSuperSerialCard(slot);
break;
case CT_MockingboardC:
case CT_MegaAudio:
m_slot[slot] = new MockingboardCard(slot, type);
break;
case CT_GenericPrinter:

2
source/CmdLine.cpp
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@ -175,6 +175,8 @@ bool ProcessCmdLine(LPSTR lpCmdLine)
}
if (strcmp(lpCmdLine, "hdc") == 0)
g_cmdLine.slotInsert[slot] = CT_GenericHDD;
if (strcmp(lpCmdLine, "megaaudio") == 0)
g_cmdLine.slotInsert[slot] = CT_MegaAudio;
if (strcmp(lpCmdLine, "parallel") == 0)
{
if (slot == SLOT1)

33
source/Configuration/PageSound.cpp
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@ -44,6 +44,16 @@ const char CPageSound::m_soundCardChoices[] = "Mockingboard\0"
"SAM\0"
"Empty\0";
// Don't reveal MegaAudio card unless it's been specified from the command line.
// The reasons being are that:
// . this card is purely for regression testing against mb-audit
// . it's confusing to offer this to the end user
const char CPageSound::m_soundCardChoicesEx[] = "Mockingboard\0"
"Phasor\0"
"SAM\0"
"Empty\0"
"MEGA Audio\0";
const char CPageSound::m_soundCardChoice_Unavailable[] = "Unavailable\0\0"; // doubly-null terminate
INT_PTR CALLBACK CPageSound::DlgProc(HWND hWnd, UINT message, WPARAM wparam, LPARAM lparam)
@ -105,6 +115,7 @@ INT_PTR CPageSound::DlgProcInternal(HWND hWnd, UINT message, WPARAM wparam, LPAR
case SC_PHASOR: newCard = CT_Phasor; break;
case SC_SAM: newCard = CT_SAM; break;
case SC_EMPTY: newCard = CT_Empty; break;
case SC_MEGAAUDIO: newCard = CT_MegaAudio; break;
default: _ASSERT(0); break;
}
@ -166,28 +177,44 @@ CPageSound::SOUNDCARDCHOICE CPageSound::CardTypeToComboItem(SS_CARDTYPE card)
case CT_Phasor: return SC_PHASOR;
case CT_SAM: return SC_SAM;
case CT_Empty: return SC_EMPTY;
case CT_MegaAudio: return SC_MEGAAUDIO;
default: _ASSERT(0); return SC_EMPTY;
}
}
void CPageSound::InitOptions(HWND hWnd)
{
const SS_CARDTYPE slot4 = m_PropertySheetHelper.GetConfigNew().m_Slot[4];
const SS_CARDTYPE slot5 = m_PropertySheetHelper.GetConfigNew().m_Slot[5];
const SS_CARDTYPE slot4 = m_PropertySheetHelper.GetConfigNew().m_Slot[SLOT4];
const SS_CARDTYPE slot5 = m_PropertySheetHelper.GetConfigNew().m_Slot[SLOT5];
bool isSlot4SoundCard = slot4 == CT_MockingboardC || slot4 == CT_Phasor || slot4 == CT_SAM || slot4 == CT_Empty;
bool isSlot5SoundCard = slot5 == CT_MockingboardC || slot5 == CT_Phasor || slot5 == CT_SAM || slot5 == CT_Empty;
bool isSlot4SoundCardEx = slot4 == CT_MegaAudio;
bool isSlot5SoundCardEx = slot5 == CT_MegaAudio;
if (isSlot4SoundCardEx || isSlot5SoundCardEx)
{
isSlot4SoundCardEx = isSlot5SoundCardEx = true; // if MegaAudio is visible in either, then make it available in both menus
isSlot4SoundCard = isSlot5SoundCard = false;
}
if (isSlot4SoundCard)
m_PropertySheetHelper.FillComboBox(hWnd, IDC_SOUNDCARD_SLOT4, m_soundCardChoices, (int)CardTypeToComboItem(slot4));
else if (isSlot4SoundCardEx)
m_PropertySheetHelper.FillComboBox(hWnd, IDC_SOUNDCARD_SLOT4, m_soundCardChoicesEx, (int)CardTypeToComboItem(slot4));
else
m_PropertySheetHelper.FillComboBox(hWnd, IDC_SOUNDCARD_SLOT4, m_soundCardChoice_Unavailable, 0);
if (isSlot5SoundCard)
m_PropertySheetHelper.FillComboBox(hWnd, IDC_SOUNDCARD_SLOT5, m_soundCardChoices, (int)CardTypeToComboItem(slot5));
else if (isSlot5SoundCardEx)
m_PropertySheetHelper.FillComboBox(hWnd, IDC_SOUNDCARD_SLOT5, m_soundCardChoicesEx, (int)CardTypeToComboItem(slot5));
else
m_PropertySheetHelper.FillComboBox(hWnd, IDC_SOUNDCARD_SLOT5, m_soundCardChoice_Unavailable, 0);
bool enableMBVolume = slot4 == CT_MockingboardC || slot5 == CT_MockingboardC || slot4 == CT_Phasor || slot5 == CT_Phasor;
bool enableMBVolume = slot4 == CT_MockingboardC || slot5 == CT_MockingboardC
|| slot4 == CT_Phasor || slot5 == CT_Phasor
|| slot4 == CT_MegaAudio || slot5 == CT_MegaAudio;
EnableWindow(GetDlgItem(hWnd, IDC_MB_VOLUME), enableMBVolume ? TRUE : FALSE);
}

3
source/Configuration/PageSound.h
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@ -28,7 +28,7 @@ protected:
virtual void DlgCANCEL(HWND hWnd){}
private:
enum SOUNDCARDCHOICE { SC_MOCKINGBOARD = 0, SC_PHASOR, SC_SAM, SC_EMPTY, _SOUNDCARD_MAX_CHOICES, SC_UNAVAILABLE };
enum SOUNDCARDCHOICE { SC_MOCKINGBOARD = 0, SC_PHASOR, SC_SAM, SC_EMPTY, SC_MEGAAUDIO };
void InitOptions(HWND hWnd);
SOUNDCARDCHOICE CardTypeToComboItem(SS_CARDTYPE card);
@ -42,5 +42,6 @@ private:
static const UINT VOLUME_MAX = 59;
static const TCHAR m_soundchoices[];
static const char m_soundCardChoices[];
static const char m_soundCardChoicesEx[];
static const char m_soundCardChoice_Unavailable[];
};

48
source/Mockingboard.cpp
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@ -62,7 +62,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//---------------------------------------------------------------------------
MockingboardCard::MockingboardCard(UINT slot, SS_CARDTYPE type) : Card(type, slot), m_MBSubUnit{slot, slot}
MockingboardCard::MockingboardCard(UINT slot, SS_CARDTYPE type) : Card(type, slot), m_MBSubUnit{ {slot, type}, {slot, type} }
{
m_lastCumulativeCycle = 0;
m_lastAYUpdateCycle = 0;
@ -206,7 +206,8 @@ void MockingboardCard::WriteToORB(BYTE subunit)
{
BYTE value = m_MBSubUnit[subunit].sy6522.Read(SY6522::rORB);
if (subunit == 0 && // SC01 only at $Cn00 (not $Cn80)
if ((QueryType() == CT_MockingboardC || QueryType() == CT_Phasor) && // Not CT_MegaAudio
subunit == 0 && // SC01 only at $Cn00 (not $Cn80)
m_MBSubUnit[subunit].sy6522.Read(SY6522::rPCR) == 0xB0)
{
// Votrax speech data
@ -289,10 +290,17 @@ void MockingboardCard::AY8910_Write(BYTE subunit, BYTE ay, BYTE value)
break;
case AY_READ: // 5: READ FROM PSG (need to set DDRA to input)
if (pMB->isChipSelected[ay] && pMB->isAYLatchedAddressValid[ay])
r6522.SetRegORA(AYReadReg(subunit, ay, pMB->nAYCurrentRegister[ay]) & (r6522.GetReg(SY6522::rDDRA) ^ 0xff));
if (QueryType() != CT_MegaAudio)
{
if (pMB->isChipSelected[ay] && pMB->isAYLatchedAddressValid[ay])
r6522.SetRegORA(AYReadReg(subunit, ay, pMB->nAYCurrentRegister[ay]) & (r6522.GetReg(SY6522::rDDRA) ^ 0xff));
else
r6522.UpdatePortAForHiZ();
}
else
r6522.UpdatePortAForHiZ();
{
r6522.SetRegORA(0x00); // Reads not supported.
}
if (m_phasorEnable && m_phasorMode == PH_Phasor) // GH#1192
{
@ -748,10 +756,13 @@ BYTE MockingboardCard::IOWriteInternal(WORD PC, WORD nAddr, BYTE bWrite, BYTE nV
WriteToORB(subunit);
#if !DBG_MB_SS_CARD
if (nAddr & 0x40)
m_MBSubUnit[1].ssi263.Write(nAddr&0x7, nValue); // 2nd 6522 is used for 1st speech chip
if (nAddr & 0x20)
m_MBSubUnit[0].ssi263.Write(nAddr&0x7, nValue); // 1st 6522 is used for 2nd speech chip
if (QueryType() == CT_MockingboardC || QueryType() == CT_Phasor) // Not CT_MegaAudio
{
if (nAddr & 0x40)
m_MBSubUnit[1].ssi263.Write(nAddr & 0x7, nValue); // 2nd 6522 is used for 1st speech chip
if (nAddr & 0x20)
m_MBSubUnit[0].ssi263.Write(nAddr & 0x7, nValue); // 1st 6522 is used for 2nd speech chip
}
#endif
return 0;
@ -821,10 +832,10 @@ BYTE MockingboardCard::PhasorIOInternal(WORD PC, WORD nAddr, BYTE bWrite, BYTE n
void MockingboardCard::InitializeIO(LPBYTE pCxRomPeripheral)
{
if (QueryType() == CT_MockingboardC)
RegisterIoHandler(m_slot, IO_Null, IO_Null, IORead, IOWrite, this, NULL);
else // Phasor
if (QueryType() == CT_Phasor)
RegisterIoHandler(m_slot, PhasorIO, PhasorIO, IORead, IOWrite, this, NULL);
else // All other Mockingboard variants
RegisterIoHandler(m_slot, IO_Null, IO_Null, IORead, IOWrite, this, NULL);
if (g_bDisableDirectSound || g_bDisableDirectSoundMockingboard)
return;
@ -932,6 +943,7 @@ int MockingboardCard::MB_SyncEventCallbackInternal(int id, int /*cycles*/, ULONG
pMB->sy6522.StartTimer1();
if (pMB->sy6522.IsTimer1IrqDelay())
return 0x0001; // T1C=0xFFFF, which is really -1, as there's 1 cycle until underflow occurs
// TODO: can also be 0x0002 for MegaAudio
return pMB->sy6522.GetRegT1C() + SY6522::kExtraTimerCycles;
}
@ -1146,6 +1158,12 @@ std::string MockingboardCard::GetSnapshotCardNamePhasor(void)
return name;
}
std::string MockingboardCard::GetSnapshotCardNameMegaAudio(void)
{
static const std::string name("MEGA Audio");
return name;
}
void MockingboardCard::SaveSnapshot(YamlSaveHelper& yamlSaveHelper)
{
if (QueryType() == CT_Phasor)
@ -1153,7 +1171,11 @@ void MockingboardCard::SaveSnapshot(YamlSaveHelper& yamlSaveHelper)
//
YamlSaveHelper::Slot slot(yamlSaveHelper, GetSnapshotCardName(), m_slot, kUNIT_VERSION);
std::string cardName = GetSnapshotCardName();
if (QueryType() == CT_MegaAudio)
cardName = GetSnapshotCardNameMegaAudio();
YamlSaveHelper::Slot slot(yamlSaveHelper, cardName, m_slot, kUNIT_VERSION);
YamlSaveHelper::Label state(yamlSaveHelper, "%s:\n", SS_YAML_KEY_STATE);

5
source/Mockingboard.h
View File

@ -68,6 +68,7 @@ public:
static std::string GetSnapshotCardName(void);
static std::string GetSnapshotCardNamePhasor(void);
static std::string GetSnapshotCardNameMegaAudio(void);
private:
enum MockingboardUnitState_e { AY_NOP0, AY_NOP1, AY_INACTIVE, AY_READ, AY_NOP4, AY_NOP5, AY_WRITE, AY_LATCH };
@ -83,7 +84,7 @@ private:
bool isAYLatchedAddressValid[NUM_AY8913_PER_SUBUNIT];
bool isChipSelected[NUM_AY8913_PER_SUBUNIT];
MB_SUBUNIT(UINT slot) : sy6522(slot), ssi263(slot)
MB_SUBUNIT(UINT slot, SS_CARDTYPE type) : sy6522(slot, type == CT_MegaAudio), ssi263(slot)
{
nAY8910Number = 0;
// sy6522 & ssi263 have already been default constructed
@ -95,7 +96,7 @@ private:
nAYCurrentRegister[0] = nAYCurrentRegister[1] = 0; // not valid
state[0] = state[1] = AY_INACTIVE;
isAYLatchedAddressValid[0] = isAYLatchedAddressValid[1] = false; // after AY reset
isChipSelected[0] = type == CT_MockingboardC ? true : false;
isChipSelected[0] = type == CT_Phasor ? false : true; // Only Phasor is false, all other MB variants are true
isChipSelected[1] = false;
}
};

2
source/MockingboardCardManager.cpp
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@ -42,7 +42,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
bool MockingboardCardManager::IsMockingboard(UINT slot)
{
SS_CARDTYPE type = GetCardMgr().QuerySlot(slot);
return type == CT_MockingboardC || type == CT_Phasor;
return type == CT_MockingboardC || type == CT_Phasor || type == CT_MegaAudio;
}
void MockingboardCardManager::ReinitializeClock(void)

5
source/Windows/AppleWin.cpp
View File

@ -775,6 +775,11 @@ static void RepeatInitialization(void)
GetCardMgr().Insert(SLOT3, g_cmdLine.slotInsert[SLOT3]);
}
if (g_cmdLine.slotInsert[SLOT4] != CT_Empty)
{
GetCardMgr().Insert(SLOT4, g_cmdLine.slotInsert[SLOT4]);
}
if (g_cmdLine.slotInsert[SLOT5] != CT_Empty)
{
if (GetCardMgr().QuerySlot(SLOT5) != CT_Disk2) // Ignore if already got Disk2 in slot 5