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Mockingboard/Phasor unit functions only work from an inactive state
(#320) - Extended save-state (MB/Phasor v3) to support 'Unit state'
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tomcw
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66321febba
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74ac2a4f22
@ -117,6 +117,8 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#define Phasor_SY6522A_Offset (1<<Phasor_SY6522A_CS)
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#define Phasor_SY6522B_Offset (1<<Phasor_SY6522B_CS)
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enum MockingboardUnitState_e {AY_NOP0, AY_NOP1, AY_INACTIVE, AY_READ, AY_NOP4, AY_NOP5, AY_WRITE, AY_LATCH};
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struct SY6522_AY8910
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{
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SY6522 sy6522;
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@ -125,6 +127,7 @@ struct SY6522_AY8910
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bool bTimer1Active;
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bool bTimer2Active;
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SSI263A SpeechChip;
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MockingboardUnitState_e state; // Where a unit is a 6522+AY8910 pair (or for Phasor: 6522+2xAY8910)
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};
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@ -272,6 +275,7 @@ static void ResetSY6522(SY6522_AY8910* pMB)
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StopTimer2(pMB);
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pMB->nAYCurrentRegister = 0;
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pMB->state = AY_INACTIVE;
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}
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//-----------------------------------------------------------------------------
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@ -293,31 +297,35 @@ static void AY8910_Write(BYTE nDevice, BYTE nReg, BYTE nValue, BYTE nAYDevice)
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const int nBC2 = 1; // Hardwired to +5V
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int nBC1 = nValue & 1;
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int nAYFunc = (nBDIR<<2) | (nBC2<<1) | nBC1;
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enum {AY_NOP0, AY_NOP1, AY_INACTIVE, AY_READ, AY_NOP4, AY_NOP5, AY_WRITE, AY_LATCH};
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MockingboardUnitState_e nAYFunc = (MockingboardUnitState_e) ((nBDIR<<2) | (nBC2<<1) | nBC1);
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switch (nAYFunc)
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if (pMB->state == AY_INACTIVE) // GH#320: functions only work from inactive state
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{
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case AY_INACTIVE: // 4: INACTIVE
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break;
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switch (nAYFunc)
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{
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case AY_INACTIVE: // 4: INACTIVE
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break;
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case AY_READ: // 5: READ FROM PSG (need to set DDRA to input)
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break;
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case AY_READ: // 5: READ FROM PSG (need to set DDRA to input)
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break;
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case AY_WRITE: // 6: WRITE TO PSG
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_AYWriteReg(nDevice+2*nAYDevice, pMB->nAYCurrentRegister, pMB->sy6522.ORA);
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break;
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case AY_WRITE: // 6: WRITE TO PSG
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_AYWriteReg(nDevice+2*nAYDevice, pMB->nAYCurrentRegister, pMB->sy6522.ORA);
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break;
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case AY_LATCH: // 7: LATCH ADDRESS
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// http://www.worldofspectrum.org/forums/showthread.php?t=23327
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// Selecting an unused register number above 0x0f puts the AY into a state where
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// any values written to the data/address bus are ignored, but can be read back
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// within a few tens of thousands of cycles before they decay to zero.
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if(pMB->sy6522.ORA <= 0x0F)
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pMB->nAYCurrentRegister = pMB->sy6522.ORA & 0x0F;
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// else Pro-Mockingboard (clone from HK)
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break;
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case AY_LATCH: // 7: LATCH ADDRESS
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// http://www.worldofspectrum.org/forums/showthread.php?t=23327
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// Selecting an unused register number above 0x0f puts the AY into a state where
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// any values written to the data/address bus are ignored, but can be read back
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// within a few tens of thousands of cycles before they decay to zero.
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if(pMB->sy6522.ORA <= 0x0F)
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pMB->nAYCurrentRegister = pMB->sy6522.ORA & 0x0F;
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// else Pro-Mockingboard (clone from HK)
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break;
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}
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}
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pMB->state = nAYFunc;
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}
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}
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@ -1881,6 +1889,7 @@ int MB_SetSnapshot_v1(const SS_CARD_MOCKINGBOARD_v1* const pSS, const DWORD /*dw
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memcpy(AY8910_GetRegsPtr(nDeviceNum), &pSS->Unit[i].RegsAY8910, 16);
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memcpy(&pMB->SpeechChip, &pSS->Unit[i].RegsSSI263, sizeof(SSI263A));
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pMB->nAYCurrentRegister = pSS->Unit[i].nAYCurrentRegister;
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pMB->state = AY_INACTIVE;
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StartTimer1_LoadStateV1(pMB); // Attempt to start timer
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@ -1946,6 +1955,11 @@ static UINT DoReadFile(const HANDLE hFile, void* const pData, const UINT Length)
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//===========================================================================
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// Unit version history:
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// 2: Added: Timer1 & Timer2 active
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// 3: Added: Unit state
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const UINT kUNIT_VERSION = 3;
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const UINT NUM_MB_UNITS = 2;
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const UINT NUM_PHASOR_UNITS = 2;
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@ -1972,6 +1986,7 @@ const UINT NUM_PHASOR_UNITS = 2;
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#define SS_YAML_KEY_SSI263_REG_FILTER_FREQ "Filter Frequency"
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#define SS_YAML_KEY_SSI263_REG_CURRENT_MODE "Current Mode"
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#define SS_YAML_KEY_AY_CURR_REG "AY Current Register"
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#define SS_YAML_KEY_MB_UNIT_STATE "Unit State"
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#define SS_YAML_KEY_TIMER1_IRQ "Timer1 IRQ Pending"
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#define SS_YAML_KEY_TIMER2_IRQ "Timer2 IRQ Pending"
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#define SS_YAML_KEY_SPEECH_IRQ "Speech IRQ Pending"
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@ -2032,8 +2047,7 @@ void MB_SaveSnapshot(YamlSaveHelper& yamlSaveHelper, const UINT uSlot)
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UINT nDeviceNum = nMbCardNum*2;
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SY6522_AY8910* pMB = &g_MB[nDeviceNum];
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const UINT version = 2;
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YamlSaveHelper::Slot slot(yamlSaveHelper, MB_GetSnapshotCardName(), uSlot, version); // fixme: object should be just 1 Mockingboard card & it will know its slot
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YamlSaveHelper::Slot slot(yamlSaveHelper, MB_GetSnapshotCardName(), uSlot, kUNIT_VERSION); // fixme: object should be just 1 Mockingboard card & it will know its slot
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YamlSaveHelper::Label state(yamlSaveHelper, "%s:\n", SS_YAML_KEY_STATE);
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@ -2045,6 +2059,7 @@ void MB_SaveSnapshot(YamlSaveHelper& yamlSaveHelper, const UINT uSlot)
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AY8910_SaveSnapshot(yamlSaveHelper, nDeviceNum, std::string(""));
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SaveSnapshotSSI263(yamlSaveHelper, pMB->SpeechChip);
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yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_MB_UNIT_STATE, pMB->state);
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yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_AY_CURR_REG, pMB->nAYCurrentRegister);
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yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER1_IRQ, "false");
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yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER2_IRQ, "false");
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@ -2100,7 +2115,7 @@ bool MB_LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version)
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if (slot != 4 && slot != 5) // fixme
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throw std::string("Card: wrong slot");
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if (version < 1 || version > 2)
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if (version < 1 || version > kUNIT_VERSION)
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throw std::string("Card: wrong version");
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AY8910UpdateSetCycles();
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@ -2134,6 +2149,10 @@ bool MB_LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version)
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pMB->bTimer2Active = yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER2_ACTIVE);
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}
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pMB->state = AY_INACTIVE;
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if (version >= 3)
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pMB->state = (MockingboardUnitState_e) (yamlLoadHelper.LoadUint(SS_YAML_KEY_MB_UNIT_STATE) & 7);
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yamlLoadHelper.PopMap();
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//
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@ -2185,8 +2204,7 @@ void Phasor_SaveSnapshot(YamlSaveHelper& yamlSaveHelper, const UINT uSlot)
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UINT nDeviceNum = 0;
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SY6522_AY8910* pMB = &g_MB[0]; // fixme: Phasor uses MB's slot4(2x6522), slot4(2xSSI263), but slot4+5(4xAY8910)
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const UINT version = 2;
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YamlSaveHelper::Slot slot(yamlSaveHelper, Phasor_GetSnapshotCardName(), uSlot, version); // fixme: object should be just 1 Mockingboard card & it will know its slot
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YamlSaveHelper::Slot slot(yamlSaveHelper, Phasor_GetSnapshotCardName(), uSlot, kUNIT_VERSION); // fixme: object should be just 1 Mockingboard card & it will know its slot
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YamlSaveHelper::Label state(yamlSaveHelper, "%s:\n", SS_YAML_KEY_STATE);
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@ -2202,6 +2220,7 @@ void Phasor_SaveSnapshot(YamlSaveHelper& yamlSaveHelper, const UINT uSlot)
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AY8910_SaveSnapshot(yamlSaveHelper, nDeviceNum+1, std::string("-B"));
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SaveSnapshotSSI263(yamlSaveHelper, pMB->SpeechChip);
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yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_MB_UNIT_STATE, pMB->state);
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yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_AY_CURR_REG, pMB->nAYCurrentRegister);
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yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER1_IRQ, "false");
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yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER2_IRQ, "false");
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@ -2219,7 +2238,7 @@ bool Phasor_LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version
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if (slot != 4) // fixme
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throw std::string("Card: wrong slot");
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if (version < 1 || version > 2)
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if (version < 1 || version > kUNIT_VERSION)
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throw std::string("Card: wrong version");
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g_PhasorClockScaleFactor = yamlLoadHelper.LoadUint(SS_YAML_KEY_PHASOR_CLOCK_SCALE_FACTOR);
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@ -2256,6 +2275,10 @@ bool Phasor_LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version
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pMB->bTimer2Active = yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER2_ACTIVE);
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}
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pMB->state = AY_INACTIVE;
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if (version >= 3)
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pMB->state = (MockingboardUnitState_e) (yamlLoadHelper.LoadUint(SS_YAML_KEY_MB_UNIT_STATE) & 7);
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yamlLoadHelper.PopMap();
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//
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