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Mockingboard: After AY is reset, then latched addr isn't valid

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. Save-state: save all 8 bits of latched addr.
. Debugger: for mini-AY dump, show latched addr (current register shown in white)
This commit is contained in:
tomcw 2023-03-01 21:01:59 +00:00
parent db44b15c37
commit 89eb0cb07b
3 changed files with 30 additions and 10 deletions
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18
source/Debugger/Debugger_Display.cpp
View File

@ -2094,11 +2094,21 @@ void DrawMemory ( int line, int iMemDump )
{
if (SS_MB.Hdr.UnitHdr.hdr.v2.Type == UT_Card)
{
sText = StrFormat("%02X ", (unsigned)SS_MB.Unit[nAddr & 1].RegsAY8910[iAddress]);
if (iCol & 1)
DebuggerSetColorFG(DebuggerGetColor(iForeground));
if (iAddress <= 13)
sText = StrFormat("%02X ", (unsigned)SS_MB.Unit[nAddr & 1].RegsAY8910[iAddress]);
else
DebuggerSetColorFG(DebuggerGetColor(FG_INFO_ADDRESS));
sText = "-- "; // regs 14 & 15 aren't supported by AY-3-8913
if (SS_MB.Unit[nAddr & 1].nAYCurrentRegister == iAddress)
{
DebuggerSetColorFG(DebuggerGetColor(FG_INFO_TITLE)); // if latched address then draw in white
}
else
{
if (iCol & 1)
DebuggerSetColorFG(DebuggerGetColor(iForeground));
else
DebuggerSetColorFG(DebuggerGetColor(FG_INFO_ADDRESS));
}
}
else
{

16
source/Mockingboard.cpp
View File

@ -240,6 +240,9 @@ void MockingboardCard::AY8910_Write(BYTE subunit, BYTE ay, BYTE value)
{
// RESET: Reset AY8910 only
AY8910_reset(subunit, ay);
pMB->nAYCurrentRegister = 0; // not valid
pMB->state = pMB->stateB = AY_INACTIVE;
pMB->isAYLatchedAddressValid[0] = pMB->isAYLatchedAddressValid[1] = false;
}
else
{
@ -270,7 +273,9 @@ void MockingboardCard::AY8910_Write(BYTE subunit, BYTE ay, BYTE value)
break;
case AY_WRITE: // 6: WRITE TO PSG
_AYWriteReg(subunit, ay, pMB->nAYCurrentRegister, r6522.GetReg(SY6522::rORA));
if (pMB->isAYLatchedAddressValid[ay])
_AYWriteReg(subunit, ay, pMB->nAYCurrentRegister, r6522.GetReg(SY6522::rORA));
// else if invalid then just ignore
break;
case AY_LATCH: // 7: LATCH ADDRESS
@ -279,7 +284,10 @@ void MockingboardCard::AY8910_Write(BYTE subunit, BYTE ay, BYTE value)
// any values written to the data/address bus are ignored, but can be read back
// within a few tens of thousands of cycles before they decay to zero.
if (r6522.GetReg(SY6522::rORA) <= 0x0F)
{
pMB->nAYCurrentRegister = r6522.GetReg(SY6522::rORA) & 0x0F;
pMB->isAYLatchedAddressValid[ay] = true;
}
// else Pro-Mockingboard (clone from HK)
break;
}
@ -929,7 +937,7 @@ void MockingboardCard::GetSnapshot_v1(SS_CARD_MOCKINGBOARD_v1* const pSS)
}
memset(&pSS->Unit[i].RegsSSI263, 0, sizeof(SSI263A)); // Not used by debugger
pSS->Unit[i].nAYCurrentRegister = pMB->nAYCurrentRegister;
pSS->Unit[i].nAYCurrentRegister = pMB->isAYLatchedAddressValid[0] ? pMB->nAYCurrentRegister : 0xff;
pSS->Unit[i].bTimer1Active = pMB->sy6522.IsTimer1Active();
pSS->Unit[i].bTimer2Active = pMB->sy6522.IsTimer2Active();
pSS->Unit[i].bSpeechIrqPending = false;
@ -1092,7 +1100,7 @@ void MockingboardCard::SaveSnapshot(YamlSaveHelper& yamlSaveHelper)
pMB->ssi263.SaveSnapshot(yamlSaveHelper);
yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_MB_UNIT_STATE, pMB->state);
yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_AY_CURR_REG, pMB->nAYCurrentRegister);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_AY_CURR_REG, pMB->nAYCurrentRegister); // save all 8 bits (even though top 4 bits should be 0)
}
}
@ -1185,7 +1193,7 @@ void MockingboardCard::Phasor_SaveSnapshot(YamlSaveHelper& yamlSaveHelper)
yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_MB_UNIT_STATE, pMB->state);
yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_MB_UNIT_STATE_B, pMB->stateB);
yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_AY_CURR_REG, pMB->nAYCurrentRegister);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_AY_CURR_REG, pMB->nAYCurrentRegister); // save all 8 bits (even though top 4 bits should be 0)
}
}

6
source/Mockingboard.h
View File

@ -66,13 +66,15 @@ private:
BYTE nAYCurrentRegister;
MockingboardUnitState_e state; // Where a unit is a 6522+AY8910 pair
MockingboardUnitState_e stateB; // Phasor: 6522 & 2nd AY8910
bool isAYLatchedAddressValid[2];
MB_SUBUNIT(UINT slot) : sy6522(slot), ssi263(slot)
{
nAY8910Number = 0;
nAYCurrentRegister = 0;
state = AY_NOP0;
stateB = AY_NOP0;
state = AY_INACTIVE;
stateB = AY_INACTIVE;
isAYLatchedAddressValid[0] = isAYLatchedAddressValid[1] = false; // after AY reset
// sy6522 & ssi263 have already been default constructed
}
};