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AppleWin/source/Mockingboard.cpp

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/*
AppleWin : An Apple //e emulator for Windows
Copyright (C) 1994-1996, Michael O'Brien
Copyright (C) 1999-2001, Oliver Schmidt
Copyright (C) 2002-2005, Tom Charlesworth
Copyright (C) 2006-2007, Tom Charlesworth, Michael Pohoreski
AppleWin is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
AppleWin is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with AppleWin; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Description: Mockingboard/Phasor emulation
*
* Author: Copyright (c) 2002-2006, Tom Charlesworth
*/
// History:
//
// v1.12.07.1 (30 Dec 2005)
// - Update 6522 TIMERs after every 6502 opcode, giving more precise IRQs
// - Minimum TIMER freq is now 0x100 cycles
// - Added Phasor support
//
// v1.12.06.1 (16 July 2005)
// - Reworked 6522's ORB -> AY8910 decoder
// - Changed MB output so L=All voices from AY0 & AY2 & R=All voices from AY1 & AY3
// - Added crude support for Votrax speech chip (by using SSI263 phonemes)
//
// v1.12.04.1 (14 Sep 2004)
// - Switch MB output from dual-mono to stereo.
// - Relaxed TIMER1 freq from ~62Hz (period=0x4000) to ~83Hz (period=0x3000).
//
// 25 Apr 2004:
// - Added basic support for the SSI263 speech chip
//
// 15 Mar 2004:
// - Switched to MAME's AY8910 emulation (includes envelope support)
//
// v1.12.03 (11 Jan 2004)
// - For free-running 6522 timer1 IRQ, reload with current ACCESS_TIMER1 value.
// (Fixes Ultima 4/5 playback speed problem.)
//
// v1.12.01 (24 Nov 2002)
// - Shaped the tone waveform more logarithmically
// - Added support for MB ena/dis switch on Config dialog
// - Added log file support
//
// v1.12.00 (17 Nov 2002)
// - Initial version (no AY8910 envelope support)
//
// Notes on Votrax chip (on original Mockingboards):
// From Crimewave (Penguin Software):
// . Init:
// . DDRB = 0xFF
// . PCR = 0xB0
// . IER = 0x90
// . ORB = 0x03 (PAUSE0) or 0x3F (STOP)
// . IRQ:
// . ORB = Phoneme value
// . IRQ last phoneme complete:
// . IER = 0x10
// . ORB = 0x3F (STOP)
//
#include "StdAfx.h"
#include "Mockingboard.h"
#include "SaveState_Structs_v1.h"
#include "Core.h"
#include "CardManager.h"
#include "CPU.h"
#include "Log.h"
#include "Memory.h"
#include "SoundCore.h"
#include "SynchronousEventManager.h"
#include "YamlHelper.h"
#include "Riff.h"
#include "AY8910.h"
#include "SSI263.h"
#define DBG_MB_SS_CARD 0 // From UI, select Mockingboard (not Phasor)
#define SY6522_DEVICE_A 0
#define SY6522_DEVICE_B 1
#define NUM_MB 2
#define NUM_DEVS_PER_MB 2
#define NUM_AY8910 (NUM_MB*NUM_DEVS_PER_MB)
#define NUM_SY6522 NUM_AY8910
#define NUM_VOICES_PER_AY8910 3
#define NUM_VOICES (NUM_AY8910*NUM_VOICES_PER_AY8910)
// Chip offsets from card base.
#define SY6522A_Offset 0x00
#define SY6522B_Offset 0x80
#define SSI263B_Offset 0x20
#define SSI263A_Offset 0x40
//#define Phasor_SY6522A_CS 4
//#define Phasor_SY6522B_CS 7
//#define Phasor_SY6522A_Offset (1<<Phasor_SY6522A_CS)
//#define Phasor_SY6522B_Offset (1<<Phasor_SY6522B_CS)
enum MockingboardUnitState_e {AY_NOP0, AY_NOP1, AY_INACTIVE, AY_READ, AY_NOP4, AY_NOP5, AY_WRITE, AY_LATCH};
struct SY6522_AY8910
{
SY6522 sy6522;
BYTE nAY8910Number;
BYTE nAYCurrentRegister;
bool bTimer1Active;
bool bTimer2Active;
SSI263 ssi263;
MockingboardUnitState_e state; // Where a unit is a 6522+AY8910 pair
MockingboardUnitState_e stateB; // Phasor: 6522 & 2nd AY8910
// SSI263 has a constructor, and so SY6522_AY8910 needs one too
// memset(0) is not guaranteed to work
SY6522_AY8910(void)
{
memset(&sy6522, 0, sizeof(sy6522));
nAY8910Number = 0;
nAYCurrentRegister = 0;
bTimer1Active = false;
bTimer2Active = false;
state = AY_NOP0;
stateB = AY_NOP0;
// ssi263 has already been default constructed
}
};
// ACR:
#define RUNMODE (1<<6) // 0 = 1-Shot Mode, 1 = Free Running Mode
#define RM_ONESHOT (0<<6)
#define RM_FREERUNNING (1<<6)
// Support 2 MB's, each with 2x SY6522/AY8910 pairs.
static SY6522_AY8910 g_MB[NUM_AY8910];
const UINT kExtraTimerCycles = 2; // Rockwell, Fig.16: period = N+2 cycles
const UINT kNumTimersPer6522 = 2;
const UINT kNumSyncEvents = NUM_MB * NUM_SY6522 * kNumTimersPer6522;
static SyncEvent* g_syncEvent[kNumSyncEvents];
// Timer vars
static const UINT kTIMERDEVICE_INVALID = -1;
static UINT g_nMBTimerDevice = kTIMERDEVICE_INVALID; // SY6522 device# which is generating timer IRQ
static UINT64 g_uLastCumulativeCycles = 0;
static const DWORD SAMPLE_RATE = 44100; // Use a base freq so that DirectX (or sound h/w) doesn't have to up/down-sample
static short* ppAYVoiceBuffer[NUM_VOICES] = {0};
static unsigned __int64 g_nMB_InActiveCycleCount = 0;
static bool g_bMB_RegAccessedFlag = false;
static bool g_bMB_Active = false;
static bool g_bMBAvailable = false;
//
static SS_CARDTYPE g_SoundcardType = CT_Empty; // Use CT_Empty to mean: no soundcard
static bool g_bPhasorEnable = false;
static PHASOR_MODE g_phasorMode = PH_Mockingboard;
static UINT g_PhasorClockScaleFactor = 1; // for save-state only
//-------------------------------------
static const unsigned short g_nMB_NumChannels = 2;
static const DWORD g_dwDSBufferSize = MAX_SAMPLES * sizeof(short) * g_nMB_NumChannels;
static const SHORT nWaveDataMin = (SHORT)0x8000;
static const SHORT nWaveDataMax = (SHORT)0x7FFF;
static short g_nMixBuffer[g_dwDSBufferSize / sizeof(short)];
static VOICE MockingboardVoice;
static UINT g_cyclesThisAudioFrame = 0;
//---------------------------------------------------------------------------
// Forward refs:
static int MB_SyncEventCallback(int id, int cycles, ULONG uExecutedCycles);
//---------------------------------------------------------------------------
void MB_Get6522IrqDescription(std::string& desc)
{
for (UINT i=0; i<NUM_AY8910; i++)
{
if (g_MB[i].sy6522.IFR & 0x80)
{
if (g_MB[i].sy6522.IFR & IxR_TIMER1)
{
desc += ((i&1)==0) ? "A:" : "B:";
desc += "TIMER1 ";
}
if (g_MB[i].sy6522.IFR & IxR_TIMER2)
{
desc += ((i&1)==0) ? "A:" : "B:";
desc += "TIMER2 ";
}
if (g_MB[i].sy6522.IFR & IxR_VOTRAX)
{
desc += ((i&1)==0) ? "A:" : "B:";
desc += "VOTRAX ";
}
if (g_MB[i].sy6522.IFR & IxR_SSI263)
{
desc += ((i&1)==0) ? "A:" : "B:";
desc += "SSI263 ";
}
}
}
}
//---------------------------------------------------------------------------
static void StartTimer1(SY6522_AY8910* pMB)
{
pMB->bTimer1Active = true;
if (pMB->sy6522.IER & IxR_TIMER1) // Using 6522 interrupt
g_nMBTimerDevice = pMB->nAY8910Number;
else if (pMB->sy6522.ACR & RM_FREERUNNING) // Polling 6522 IFR (GH#496)
g_nMBTimerDevice = pMB->nAY8910Number;
}
// The assumption was that timer1 was only active if IER.TIMER1=1
// . Not true, since IFR can be polled (with IER.TIMER1=0)
static void StartTimer1_LoadStateV1(SY6522_AY8910* pMB)
{
if ((pMB->sy6522.IER & IxR_TIMER1) == 0x00)
return;
pMB->bTimer1Active = true;
g_nMBTimerDevice = pMB->nAY8910Number;
}
static void StopTimer1(SY6522_AY8910* pMB)
{
pMB->bTimer1Active = false;
g_nMBTimerDevice = kTIMERDEVICE_INVALID;
}
//-----------------------------------------------------------------------------
static void StartTimer2(SY6522_AY8910* pMB)
{
pMB->bTimer2Active = true;
// NB. Can't mimic StartTimer1() as that would stomp on global state
// TODO: Switch to per-device state
}
static void StopTimer2(SY6522_AY8910* pMB)
{
pMB->bTimer2Active = false;
}
//-----------------------------------------------------------------------------
static void SY6522_Write(BYTE nDevice, BYTE nReg, BYTE nValue);
static void ResetSY6522(SY6522_AY8910* pMB, const bool powerCycle)
{
if (powerCycle)
{
memset(&pMB->sy6522,0,sizeof(SY6522));
pMB->sy6522.TIMER1_LATCH.w = 0xffff; // Some random value (but pick $ffff so it's deterministic)
// . NB. if it's too small (< ~$0007) then MB detection routines will fail!
}
SY6522_Write(pMB->nAY8910Number, 0x0b, 0x00); // ACR = 0x00: T1 one-shot mode
SY6522_Write(pMB->nAY8910Number, 0x0d, 0x7f); // IFR = 0x7F: de-assert any IRQs
SY6522_Write(pMB->nAY8910Number, 0x0e, 0x7f); // IFE = 0x7F: disable all IRQs
StopTimer1(pMB);
StopTimer2(pMB);
pMB->nAYCurrentRegister = 0;
pMB->state = AY_INACTIVE;
pMB->stateB = AY_INACTIVE;
}
//-----------------------------------------------------------------------------
static void AY8910_Write(BYTE nDevice, BYTE /*nReg*/, BYTE nValue, BYTE nAYDevice)
{
g_bMB_RegAccessedFlag = true;
SY6522_AY8910* pMB = &g_MB[nDevice];
if ((nValue & 4) == 0)
{
// RESET: Reset AY8910 only
AY8910_reset(nDevice+2*nAYDevice);
}
else
{
// Determine the AY8910 inputs
int nBDIR = (nValue & 2) ? 1 : 0;
const int nBC2 = 1; // Hardwired to +5V
int nBC1 = nValue & 1;
MockingboardUnitState_e nAYFunc = (MockingboardUnitState_e) ((nBDIR<<2) | (nBC2<<1) | nBC1);
MockingboardUnitState_e& state = (nAYDevice == 0) ? pMB->state : pMB->stateB; // GH#659
#if _DEBUG
if (!g_bPhasorEnable)
_ASSERT(nAYDevice == 0);
if (nAYFunc == AY_WRITE || nAYFunc == AY_LATCH)
_ASSERT(state == AY_INACTIVE);
#endif
if (state == AY_INACTIVE) // GH#320: functions only work from inactive state
{
switch (nAYFunc)
{
case AY_INACTIVE: // 4: INACTIVE
break;
case AY_READ: // 5: READ FROM PSG (need to set DDRA to input)
if (g_bPhasorEnable && g_phasorMode == PH_EchoPlus)
pMB->sy6522.ORA = 0xff & (pMB->sy6522.DDRA ^ 0xff); // Phasor (Echo+ mode) doesn't support reading AY8913s - it just reads 1's for the input bits
else
pMB->sy6522.ORA = AYReadReg(nDevice+2*nAYDevice, pMB->nAYCurrentRegister) & (pMB->sy6522.DDRA ^ 0xff);
break;
case AY_WRITE: // 6: WRITE TO PSG
_AYWriteReg(nDevice+2*nAYDevice, pMB->nAYCurrentRegister, pMB->sy6522.ORA);
break;
case AY_LATCH: // 7: LATCH ADDRESS
// http://www.worldofspectrum.org/forums/showthread.php?t=23327
// Selecting an unused register number above 0x0f puts the AY into a state where
// 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(pMB->sy6522.ORA <= 0x0F)
pMB->nAYCurrentRegister = pMB->sy6522.ORA & 0x0F;
// else Pro-Mockingboard (clone from HK)
break;
}
}
state = nAYFunc;
}
}
// TODO: RMW opcodes: dec,inc,asl,lsr,rol,ror (abs16 & abs16,x) + 65C02 trb,tsb (abs16)
static UINT GetOpcodeCyclesForRead(BYTE reg)
{
UINT opcodeCycles = 0;
BYTE opcode = 0;
bool abs16 = false;
bool abs16x = false;
bool abs16y = false;
bool indx = false;
bool indy = false;
const BYTE opcodeMinus3 = mem[(regs.pc-3)&0xffff];
const BYTE opcodeMinus2 = mem[(regs.pc-2)&0xffff];
if ( ((opcodeMinus2 & 0x0f) == 0x01) && ((opcodeMinus2 & 0x10) == 0x00) ) // ora (zp,x), and (zp,x), ..., sbc (zp,x)
{
// NB. this is for read, so don't need to exclude 0x81 / sta (zp,x)
opcodeCycles = 6;
opcode = opcodeMinus2;
indx = true;
}
else if ( ((opcodeMinus2 & 0x0f) == 0x01) && ((opcodeMinus2 & 0x10) == 0x10) ) // ora (zp),y, and (zp),y, ..., sbc (zp),y
{
// NB. this is for read, so don't need to exclude 0x91 / sta (zp),y
opcodeCycles = 5;
opcode = opcodeMinus2;
indy = true;
}
else if ( ((opcodeMinus2 & 0x0f) == 0x02) && ((opcodeMinus2 & 0x10) == 0x10) && GetMainCpu() == CPU_65C02 ) // ora (zp), and (zp), ..., sbc (zp) : 65C02-only
{
// NB. this is for read, so don't need to exclude 0x92 / sta (zp)
opcodeCycles = 5;
opcode = opcodeMinus2;
}
else
{
if ( (((opcodeMinus3 & 0x0f) == 0x0D) && ((opcodeMinus3 & 0x10) == 0x00)) || // ora abs16, and abs16, ..., sbc abs16
(opcodeMinus3 == 0x2C) || // bit abs16
(opcodeMinus3 == 0xAC) || // ldy abs16
(opcodeMinus3 == 0xAE) || // ldx abs16
(opcodeMinus3 == 0xCC) || // cpy abs16
(opcodeMinus3 == 0xEC) ) // cpx abs16
{
}
else if ( (opcodeMinus3 == 0xBC) || // ldy abs16,x
((opcodeMinus3 == 0x3C) && GetMainCpu() == CPU_65C02) ) // bit abs16,x : 65C02-only
{
abs16x = true;
}
else if ( (opcodeMinus3 == 0xBE) ) // ldx abs16,y
{
abs16y = true;
}
else if ((opcodeMinus3 & 0x10) == 0x10)
{
if ((opcodeMinus3 & 0x0f) == 0x0D) // ora abs16,x, and abs16,x, ..., sbc abs16,x
abs16x = true;
else if ((opcodeMinus3 & 0x0f) == 0x09) // ora abs16,y, and abs16,y, ..., sbc abs16,y
abs16y = true;
}
else
{
_ASSERT(0);
opcodeCycles = 0;
return 0;
}
opcodeCycles = 4;
opcode = opcodeMinus3;
abs16 = true;
}
//
WORD addr16 = 0;
if (!abs16)
{
BYTE zp = mem[(regs.pc-1)&0xffff];
if (indx) zp += regs.x;
addr16 = (mem[zp] | (mem[(zp+1)&0xff]<<8));
if (indy) addr16 += regs.y;
}
else
{
addr16 = mem[(regs.pc-2)&0xffff] | (mem[(regs.pc-1)&0xffff]<<8);
if (abs16y) addr16 += regs.y;
if (abs16x) addr16 += regs.x;
}
// Check we've reverse looked-up the 6502 opcode correctly
if ((addr16 & 0xF80F) != (0xC000+reg))
{
_ASSERT(0);
return 0;
}
return opcodeCycles;
}
// TODO: RMW opcodes: dec,inc,asl,lsr,rol,ror (abs16 & abs16,x) + 65C02 trb,tsb (abs16)
static UINT GetOpcodeCyclesForWrite(BYTE reg)
{
UINT opcodeCycles = 0;
BYTE opcode = 0;
bool abs16 = false;
const BYTE opcodeMinus3 = mem[(regs.pc-3)&0xffff];
const BYTE opcodeMinus2 = mem[(regs.pc-2)&0xffff];
if ( (opcodeMinus3 == 0x8C) || // sty abs16
(opcodeMinus3 == 0x8D) || // sta abs16
(opcodeMinus3 == 0x8E) ) // stx abs16
{ // Eg. FT demos: CHIP, MADEF, MAD2
opcodeCycles = 4;
opcode = opcodeMinus3;
abs16 = true;
}
else if ( (opcodeMinus3 == 0x99) || // sta abs16,y
(opcodeMinus3 == 0x9D) ) // sta abs16,x
{ // Eg. Paleotronic microTracker demo
opcodeCycles = 5;
opcode = opcodeMinus3;
abs16 = true;
}
else if (opcodeMinus2 == 0x81) // sta (zp,x)
{
opcodeCycles = 6;
opcode = opcodeMinus2;
}
else if (opcodeMinus2 == 0x91) // sta (zp),y
{ // Eg. FT demos: OMT, PLS
opcodeCycles = 6;
opcode = opcodeMinus2;
}
else if (opcodeMinus2 == 0x92 && GetMainCpu() == CPU_65C02) // sta (zp) : 65C02-only
{
opcodeCycles = 5;
opcode = opcodeMinus2;
}
else if (opcodeMinus3 == 0x9C && GetMainCpu() == CPU_65C02) // stz abs16 : 65C02-only
{
opcodeCycles = 4;
opcode = opcodeMinus3;
abs16 = true;
}
else if (opcodeMinus3 == 0x9E && GetMainCpu() == CPU_65C02) // stz abs16,x : 65C02-only
{
opcodeCycles = 5;
opcode = opcodeMinus3;
abs16 = true;
}
else
{
_ASSERT(0);
opcodeCycles = 0;
return 0;
}
//
WORD addr16 = 0;
if (!abs16)
{
BYTE zp = mem[(regs.pc-1)&0xffff];
if (opcode == 0x81) zp += regs.x;
addr16 = (mem[zp] | (mem[(zp+1)&0xff]<<8));
if (opcode == 0x91) addr16 += regs.y;
}
else
{
addr16 = mem[(regs.pc-2)&0xffff] | (mem[(regs.pc-1)&0xffff]<<8);
if (opcode == 0x99) addr16 += regs.y;
if (opcode == 0x9D || opcode == 0x9E) addr16 += regs.x;
}
// Check we've reverse looked-up the 6502 opcode correctly
if ((addr16 & 0xF80F) != (0xC000+reg))
{
_ASSERT(0);
return 0;
}
return opcodeCycles;
}
// Insert a new synchronous event whenever the 6522 timer's counter is written.
// . NB. it doesn't matter if the timer's interrupt enable (IER) is set or not
// - the state of IER is only important when the counter underflows - see: MB_SyncEventCallback()
static USHORT SetTimerSyncEvent(UINT id, BYTE reg, USHORT timerLatch)
{
// NB. This TIMER adjustment value gets subtracted when this current opcode completes, so no need to persist to save-state
const UINT opcodeCycleAdjust = GetOpcodeCyclesForWrite(reg);
SyncEvent* pSyncEvent = g_syncEvent[id];
if (pSyncEvent->m_active)
g_SynchronousEventMgr.Remove(id);
pSyncEvent->SetCycles(timerLatch + kExtraTimerCycles + opcodeCycleAdjust);
g_SynchronousEventMgr.Insert(pSyncEvent);
// It doesn't matter if this overflows (ie. >0xFFFF), since on completion of current opcode it'll be corrected
return (USHORT) (timerLatch + opcodeCycleAdjust);
}
static void UpdateIFR(SY6522_AY8910* pMB, BYTE clr_ifr, BYTE set_ifr=0)
{
pMB->sy6522.IFR &= ~clr_ifr;
pMB->sy6522.IFR |= set_ifr;
if (pMB->sy6522.IFR & pMB->sy6522.IER & 0x7F)
pMB->sy6522.IFR |= 0x80;
else
pMB->sy6522.IFR &= 0x7F;
// Now update the IRQ signal from all 6522s
// . OR-sum of all active TIMER1, TIMER2 & SPEECH sources (from all 6522s)
UINT bIRQ = 0;
for (UINT i=0; i<NUM_SY6522; i++)
bIRQ |= g_MB[i].sy6522.IFR & 0x80;
// NB. Mockingboard generates IRQ on both 6522s:
// . SSI263's IRQ (A/!R) is routed via the 2nd 6522 (at $Cn80) and must generate a 6502 IRQ (not NMI)
// - NB. 2nd SSI263's IRQ is routed via the 1st 6522 (at $Cn00) and again generates a 6502 IRQ
// . SC-01's IRQ (A/!R) is routed via the 6522 at $Cn00 (NB. Only the Mockingboard "Sound/Speech I" card supports the SC-01)
// Phasor's SSI263 IRQ (A/!R) line is *also* wired directly to the 6502's IRQ (as well as the 6522's CA1)
if (bIRQ)
CpuIrqAssert(IS_6522);
else
CpuIrqDeassert(IS_6522);
}
static void SY6522_Write(BYTE nDevice, BYTE nReg, BYTE nValue)
{
g_bMB_Active = true;
SY6522_AY8910* pMB = &g_MB[nDevice];
switch (nReg)
{
case 0x00: // ORB
{
nValue &= pMB->sy6522.DDRB;
pMB->sy6522.ORB = nValue;
if ((nDevice&1) == 0 && // SC01 only at $Cn00 (not $Cn80)
pMB->sy6522.PCR == 0xB0)
{
// Votrax speech data
pMB->ssi263.Votrax_Write((nValue & pMB->sy6522.DDRB) | (pMB->sy6522.DDRB ^ 0xff)); // DDRB's zero bits (inputs) are high impedence, so output as 1 (GH#952)
break;
}
#if DBG_MB_SS_CARD
if ((nDevice & 1) == 1)
AY8910_Write(nDevice, nReg, nValue, 0);
#else
if(g_bPhasorEnable)
{
int nAY_CS = (g_phasorMode == PH_Phasor) ? (~(nValue >> 3) & 3) : 1;
if(nAY_CS & 1)
AY8910_Write(nDevice, nReg, nValue, 0);
if(nAY_CS & 2)
AY8910_Write(nDevice, nReg, nValue, 1);
}
else
{
AY8910_Write(nDevice, nReg, nValue, 0);
}
#endif
break;
}
case 0x01: // ORA
pMB->sy6522.ORA = nValue & pMB->sy6522.DDRA;
break;
case 0x02: // DDRB
pMB->sy6522.DDRB = nValue;
break;
case 0x03: // DDRA
pMB->sy6522.DDRA = nValue;
break;
case 0x04: // TIMER1L_COUNTER
case 0x06: // TIMER1L_LATCH
pMB->sy6522.TIMER1_LATCH.l = nValue;
break;
case 0x05: // TIMER1H_COUNTER
{
UpdateIFR(pMB, IxR_TIMER1); // Clear Timer1 Interrupt Flag
pMB->sy6522.TIMER1_LATCH.h = nValue;
const UINT id = nDevice*kNumTimersPer6522+0; // TIMER1
pMB->sy6522.TIMER1_COUNTER.w = SetTimerSyncEvent(id, nReg, pMB->sy6522.TIMER1_LATCH.w);
StartTimer1(pMB);
}
break;
case 0x07: // TIMER1H_LATCH
UpdateIFR(pMB, IxR_TIMER1); // Clear Timer1 Interrupt Flag
pMB->sy6522.TIMER1_LATCH.h = nValue;
break;
case 0x08: // TIMER2L
pMB->sy6522.TIMER2_LATCH.l = nValue;
break;
case 0x09: // TIMER2H
{
UpdateIFR(pMB, IxR_TIMER2); // Clear Timer2 Interrupt Flag
pMB->sy6522.TIMER2_LATCH.h = nValue; // NB. Real 6522 doesn't have TIMER2_LATCH.h
const UINT id = nDevice*kNumTimersPer6522+1; // TIMER2
pMB->sy6522.TIMER2_COUNTER.w = SetTimerSyncEvent(id, nReg, pMB->sy6522.TIMER2_LATCH.w);
StartTimer2(pMB);
}
break;
case 0x0a: // SERIAL_SHIFT
break;
case 0x0b: // ACR
pMB->sy6522.ACR = nValue;
break;
case 0x0c: // PCR - Used for Speech chip only
pMB->sy6522.PCR = nValue;
break;
case 0x0d: // IFR
// - Clear those bits which are set in the lower 7 bits.
// - Can't clear bit 7 directly.
UpdateIFR(pMB, nValue);
break;
case 0x0e: // IER
if(!(nValue & 0x80))
{
// Clear those bits which are set in the lower 7 bits.
nValue ^= 0x7F;
pMB->sy6522.IER &= nValue;
}
else
{
// Set those bits which are set in the lower 7 bits.
nValue &= 0x7F;
pMB->sy6522.IER |= nValue;
}
UpdateIFR(pMB, 0);
break;
case 0x0f: // ORA_NO_HS
break;
}
}
//-----------------------------------------------------------------------------
static bool CheckTimerUnderflow(USHORT& counter, int& timerIrqDelay, const USHORT nClocks);
static int OnTimer1Underflow(USHORT& counter, USHORT latch);
static USHORT GetTimer1Counter(BYTE reg, USHORT counter, USHORT latch, int timerIrqDelay)
{
const UINT opcodeCycleAdjust = GetOpcodeCyclesForRead(reg) - 1; // to compensate for the 4/5/6 cycle read opcode
if (CheckTimerUnderflow(counter, timerIrqDelay, opcodeCycleAdjust))
OnTimer1Underflow(counter, latch);
return counter;
}
static USHORT GetTimer2Counter(BYTE reg, USHORT counter)
{
const UINT opcodeCycleAdjust = GetOpcodeCyclesForRead(reg) - 1; // to compensate for the 4/5/6 cycle read opcode
return counter - opcodeCycleAdjust;
}
static bool IsTimer1Underflowed(BYTE reg, USHORT counter, USHORT latch, int timerIrqDelay)
{
const UINT opcodeCycleAdjust = GetOpcodeCyclesForRead(reg); // to compensate for the 4/5/6 cycle read opcode
return CheckTimerUnderflow(counter, timerIrqDelay, opcodeCycleAdjust);
}
static bool IsTimer2Underflowed(BYTE reg, USHORT counter)
{
return counter >= 0 && (short)GetTimer2Counter(reg, counter) < 0;
}
static BYTE SY6522_Read(BYTE nDevice, BYTE nReg)
{
g_bMB_Active = true;
SY6522_AY8910* pMB = &g_MB[nDevice];
BYTE nValue = 0x00;
switch (nReg)
{
case 0x00: // ORB
nValue = pMB->sy6522.ORB;
break;
case 0x01: // ORA
nValue = pMB->sy6522.ORA;
break;
case 0x02: // DDRB
nValue = pMB->sy6522.DDRB;
break;
case 0x03: // DDRA
nValue = pMB->sy6522.DDRA;
break;
case 0x04: // TIMER1L_COUNTER
// NB. GH#701 (T1C:=0xFFFF, LDA T1C_L[4cy], A==0xFC)
nValue = GetTimer1Counter(nReg, pMB->sy6522.TIMER1_COUNTER.w, pMB->sy6522.TIMER1_LATCH.w, pMB->sy6522.timer1IrqDelay) & 0xff;
UpdateIFR(pMB, IxR_TIMER1);
break;
case 0x05: // TIMER1H_COUNTER
nValue = GetTimer1Counter(nReg, pMB->sy6522.TIMER1_COUNTER.w, pMB->sy6522.TIMER1_LATCH.w, pMB->sy6522.timer1IrqDelay) >> 8;
break;
case 0x06: // TIMER1L_LATCH
nValue = pMB->sy6522.TIMER1_LATCH.l;
break;
case 0x07: // TIMER1H_LATCH
nValue = pMB->sy6522.TIMER1_LATCH.h;
break;
case 0x08: // TIMER2L
nValue = GetTimer2Counter(nReg, pMB->sy6522.TIMER2_COUNTER.w) & 0xff;
UpdateIFR(pMB, IxR_TIMER2);
break;
case 0x09: // TIMER2H
nValue = GetTimer2Counter(nReg, pMB->sy6522.TIMER2_COUNTER.w) >> 8;
break;
case 0x0a: // SERIAL_SHIFT
break;
case 0x0b: // ACR
nValue = pMB->sy6522.ACR;
break;
case 0x0c: // PCR
nValue = pMB->sy6522.PCR;
break;
case 0x0d: // IFR
nValue = pMB->sy6522.IFR;
if (pMB->bTimer1Active && IsTimer1Underflowed(nReg, pMB->sy6522.TIMER1_COUNTER.w, pMB->sy6522.TIMER1_LATCH.w, pMB->sy6522.timer1IrqDelay))
nValue |= IxR_TIMER1;
if (pMB->bTimer2Active && IsTimer2Underflowed(nReg, pMB->sy6522.TIMER2_COUNTER.w))
nValue |= IxR_TIMER2;
break;
case 0x0e: // IER
nValue = 0x80 | pMB->sy6522.IER; // GH#567
break;
case 0x0f: // ORA_NO_HS
nValue = pMB->sy6522.ORA;
break;
}
return nValue;
}
//===========================================================================
//#define DBG_MB_UPDATE
static UINT64 g_uLastMBUpdateCycle = 0;
// Called by:
// . MB_UpdateCycles() - when g_nMBTimerDevice == {0,1,2,3}
// . MB_PeriodicUpdate() - when g_nMBTimerDevice == kTIMERDEVICE_INVALID
static void MB_UpdateInt(void)
{
if (!MockingboardVoice.bActive)
return;
if (g_bFullSpeed)
{
// Keep AY reg writes relative to the current 'frame'
// - Required for Ultima3:
// . Tune ends
// . g_bFullSpeed:=true (disk-spinning) for ~50 frames
// . U3 sets AY_ENABLE:=0xFF (as a side-effect, this sets g_bFullSpeed:=false)
// o Without this, the write to AY_ENABLE gets ignored (since AY8910's /g_uLastCumulativeCycles/ was last set 50 frame ago)
AY8910UpdateSetCycles();
// TODO:
// If any AY regs have changed then push them out to the AY chip
return;
}
//
if (!g_bMB_RegAccessedFlag)
{
if(!g_nMB_InActiveCycleCount)
{
g_nMB_InActiveCycleCount = g_nCumulativeCycles;
}
else if(g_nCumulativeCycles - g_nMB_InActiveCycleCount > (unsigned __int64)g_fCurrentCLK6502/10)
{
// After 0.1 sec of Apple time, assume MB is not active
g_bMB_Active = false;
}
}
else
{
g_nMB_InActiveCycleCount = 0;
g_bMB_RegAccessedFlag = false;
g_bMB_Active = true;
}
//
// For small timer periods, wait for a period of 500cy before updating DirectSound ring-buffer.
// NB. A timer period of less than 24cy will yield nNumSamplesPerPeriod=0.
const double kMinimumUpdateInterval = 500.0; // Arbitary (500 cycles = 21 samples)
const double kMaximumUpdateInterval = (double)(0xFFFF+2); // Max 6522 timer interval (2756 samples)
if (g_uLastMBUpdateCycle == 0)
g_uLastMBUpdateCycle = g_uLastCumulativeCycles; // Initial call to MB_Update() after reset/power-cycle
_ASSERT(g_uLastCumulativeCycles >= g_uLastMBUpdateCycle);
double updateInterval = (double)(g_uLastCumulativeCycles - g_uLastMBUpdateCycle);
if (updateInterval < kMinimumUpdateInterval)
return;
if (updateInterval > kMaximumUpdateInterval)
updateInterval = kMaximumUpdateInterval;
g_uLastMBUpdateCycle = g_uLastCumulativeCycles;
const double nIrqFreq = g_fCurrentCLK6502 / updateInterval + 0.5; // Round-up
const int nNumSamplesPerPeriod = (int) ((double)SAMPLE_RATE / nIrqFreq); // Eg. For 60Hz this is 735
static int nNumSamplesError = 0;
int nNumSamples = nNumSamplesPerPeriod + nNumSamplesError; // Apply correction
if(nNumSamples <= 0)
nNumSamples = 0;
if(nNumSamples > 2*nNumSamplesPerPeriod)
nNumSamples = 2*nNumSamplesPerPeriod;
if (nNumSamples > MAX_SAMPLES)
nNumSamples = MAX_SAMPLES; // Clamp to prevent buffer overflow
if(nNumSamples)
for(int nChip=0; nChip<NUM_AY8910; nChip++)
AY8910Update(nChip, &ppAYVoiceBuffer[nChip*NUM_VOICES_PER_AY8910], nNumSamples);
//
DWORD dwCurrentPlayCursor, dwCurrentWriteCursor;
HRESULT hr = MockingboardVoice.lpDSBvoice->GetCurrentPosition(&dwCurrentPlayCursor, &dwCurrentWriteCursor);
if(FAILED(hr))
return;
static DWORD dwByteOffset = (DWORD)-1;
if(dwByteOffset == (DWORD)-1)
{
// First time in this func
dwByteOffset = dwCurrentWriteCursor;
}
else
{
// Check that our offset isn't between Play & Write positions
if(dwCurrentWriteCursor > dwCurrentPlayCursor)
{
// |-----PxxxxxW-----|
if((dwByteOffset > dwCurrentPlayCursor) && (dwByteOffset < dwCurrentWriteCursor))
{
#ifdef DBG_MB_UPDATE
double fTicksSecs = (double)GetTickCount() / 1000.0;
LogOutput("%010.3f: [MBUpdt] PC=%08X, WC=%08X, Diff=%08X, Off=%08X, NS=%08X xxx\n", fTicksSecs, dwCurrentPlayCursor, dwCurrentWriteCursor, dwCurrentWriteCursor-dwCurrentPlayCursor, dwByteOffset, nNumSamples);
#endif
dwByteOffset = dwCurrentWriteCursor;
nNumSamplesError = 0;
}
}
else
{
// |xxW----------Pxxx|
if((dwByteOffset > dwCurrentPlayCursor) || (dwByteOffset < dwCurrentWriteCursor))
{
#ifdef DBG_MB_UPDATE
double fTicksSecs = (double)GetTickCount() / 1000.0;
LogOutput("%010.3f: [MBUpdt] PC=%08X, WC=%08X, Diff=%08X, Off=%08X, NS=%08X XXX\n", fTicksSecs, dwCurrentPlayCursor, dwCurrentWriteCursor, dwCurrentWriteCursor-dwCurrentPlayCursor, dwByteOffset, nNumSamples);
#endif
dwByteOffset = dwCurrentWriteCursor;
nNumSamplesError = 0;
}
}
}
int nBytesRemaining = dwByteOffset - dwCurrentPlayCursor;
if(nBytesRemaining < 0)
nBytesRemaining += g_dwDSBufferSize;
// Calc correction factor so that play-buffer doesn't under/overflow
const int nErrorInc = SoundCore_GetErrorInc();
if(nBytesRemaining < g_dwDSBufferSize / 4)
nNumSamplesError += nErrorInc; // < 0.25 of buffer remaining
else if(nBytesRemaining > g_dwDSBufferSize / 2)
nNumSamplesError -= nErrorInc; // > 0.50 of buffer remaining
else
nNumSamplesError = 0; // Acceptable amount of data in buffer
#ifdef DBG_MB_UPDATE
double fTicksSecs = (double)GetTickCount() / 1000.0;
LogOutput("%010.3f: [MBUpdt] PC=%08X, WC=%08X, Diff=%08X, Off=%08X, NS=%08X, NSE=%08X, Interval=%f\n", fTicksSecs, dwCurrentPlayCursor, dwCurrentWriteCursor, dwCurrentWriteCursor - dwCurrentPlayCursor, dwByteOffset, nNumSamples, nNumSamplesError, updateInterval);
#endif
if(nNumSamples == 0)
return;
//
const double fAttenuation = g_bPhasorEnable ? 2.0/3.0 : 1.0;
for(int i=0; i<nNumSamples; i++)
{
// Mockingboard stereo (all voices on an AY8910 wire-or'ed together)
// L = Address.b7=0, R = Address.b7=1
int nDataL = 0, nDataR = 0;
for(UINT j=0; j<NUM_VOICES_PER_AY8910; j++)
{
// Slot4
nDataL += (int) ((double)ppAYVoiceBuffer[0*NUM_VOICES_PER_AY8910+j][i] * fAttenuation);
nDataR += (int) ((double)ppAYVoiceBuffer[1*NUM_VOICES_PER_AY8910+j][i] * fAttenuation);
// Slot5
nDataL += (int) ((double)ppAYVoiceBuffer[2*NUM_VOICES_PER_AY8910+j][i] * fAttenuation);
nDataR += (int) ((double)ppAYVoiceBuffer[3*NUM_VOICES_PER_AY8910+j][i] * fAttenuation);
}
// Cap the superpositioned output
if(nDataL < nWaveDataMin)
nDataL = nWaveDataMin;
else if(nDataL > nWaveDataMax)
nDataL = nWaveDataMax;
if(nDataR < nWaveDataMin)
nDataR = nWaveDataMin;
else if(nDataR > nWaveDataMax)
nDataR = nWaveDataMax;
g_nMixBuffer[i*g_nMB_NumChannels+0] = (short)nDataL; // L
g_nMixBuffer[i*g_nMB_NumChannels+1] = (short)nDataR; // R
}
//
DWORD dwDSLockedBufferSize0, dwDSLockedBufferSize1;
SHORT *pDSLockedBuffer0, *pDSLockedBuffer1;
hr = DSGetLock(MockingboardVoice.lpDSBvoice,
dwByteOffset, (DWORD)nNumSamples * sizeof(short) * g_nMB_NumChannels,
&pDSLockedBuffer0, &dwDSLockedBufferSize0,
&pDSLockedBuffer1, &dwDSLockedBufferSize1);
if (FAILED(hr))
return;
memcpy(pDSLockedBuffer0, &g_nMixBuffer[0], dwDSLockedBufferSize0);
if(pDSLockedBuffer1)
memcpy(pDSLockedBuffer1, &g_nMixBuffer[dwDSLockedBufferSize0/sizeof(short)], dwDSLockedBufferSize1);
// Commit sound buffer
hr = MockingboardVoice.lpDSBvoice->Unlock((void*)pDSLockedBuffer0, dwDSLockedBufferSize0,
(void*)pDSLockedBuffer1, dwDSLockedBufferSize1);
dwByteOffset = (dwByteOffset + (DWORD)nNumSamples*sizeof(short)*g_nMB_NumChannels) % g_dwDSBufferSize;
#ifdef RIFF_MB
RiffPutSamples(&g_nMixBuffer[0], nNumSamples);
#endif
}
static void MB_Update(void)
{
#ifdef LOG_PERF_TIMINGS
extern UINT64 g_timeMB_NoTimer;
extern UINT64 g_timeMB_Timer;
PerfMarker perfMarker(g_nMBTimerDevice == kTIMERDEVICE_INVALID ? g_timeMB_NoTimer : g_timeMB_Timer);
#endif
MB_UpdateInt();
}
//-----------------------------------------------------------------------------
static bool MB_DSInit()
{
LogFileOutput("MB_DSInit\n");
#ifdef NO_DIRECT_X
return false;
#else // NO_DIRECT_X
//
// Create single Mockingboard voice
//
if(!g_bDSAvailable)
return false;
HRESULT hr = DSGetSoundBuffer(&MockingboardVoice, DSBCAPS_CTRLVOLUME, g_dwDSBufferSize, SAMPLE_RATE, g_nMB_NumChannels, "MB");
LogFileOutput("MB_DSInit: DSGetSoundBuffer(), hr=0x%08X\n", hr);
if(FAILED(hr))
{
LogFileOutput("MB_DSInit: DSGetSoundBuffer failed (%08X)\n", hr);
return false;
}
bool bRes = DSZeroVoiceBuffer(&MockingboardVoice, g_dwDSBufferSize);
LogFileOutput("MB_DSInit: DSZeroVoiceBuffer(), res=%d\n", bRes ? 1 : 0);
if (!bRes)
return false;
MockingboardVoice.bActive = true;
// Volume might've been setup from value in Registry
if(!MockingboardVoice.nVolume)
MockingboardVoice.nVolume = DSBVOLUME_MAX;
hr = MockingboardVoice.lpDSBvoice->SetVolume(MockingboardVoice.nVolume);
LogFileOutput("MB_DSInit: SetVolume(), hr=0x%08X\n", hr);
//---------------------------------
for (UINT i=0; i<NUM_AY8910; i++)
{
if (!g_MB[i].ssi263.DSInit())
return false;
}
return true;
#endif // NO_DIRECT_X
}
static void MB_DSUninit()
{
if(MockingboardVoice.lpDSBvoice && MockingboardVoice.bActive)
DSVoiceStop(&MockingboardVoice);
DSReleaseSoundBuffer(&MockingboardVoice);
//
for (UINT i=0; i<NUM_AY8910; i++)
g_MB[i].ssi263.DSUninit();
}
//=============================================================================
//
// ----- ALL GLOBALLY ACCESSIBLE FUNCTIONS ARE BELOW THIS LINE -----
//
//=============================================================================
static void InitSoundcardType(void)
{
g_SoundcardType = CT_Empty; // Use CT_Empty to mean: no soundcard
g_bPhasorEnable = false;
}
void MB_Initialize()
{
InitSoundcardType();
LogFileOutput("MB_Initialize: g_bDisableDirectSound=%d, g_bDisableDirectSoundMockingboard=%d\n", g_bDisableDirectSound, g_bDisableDirectSoundMockingboard);
if (g_bDisableDirectSound || g_bDisableDirectSoundMockingboard)
{
MockingboardVoice.bMute = true;
}
else
{
for (UINT i=0; i<NUM_VOICES; i++)
ppAYVoiceBuffer[i] = new short [MAX_SAMPLES]; // Buffer can hold a max of 0.37 seconds worth of samples (16384/44100)
AY8910_InitAll((int)g_fCurrentCLK6502, SAMPLE_RATE);
LogFileOutput("MB_Initialize: AY8910_InitAll()\n");
for (UINT i=0; i<NUM_AY8910; i++)
{
g_MB[i] = SY6522_AY8910();
g_MB[i].nAY8910Number = i;
g_MB[i].ssi263.SetDevice(i);
}
//
g_bMBAvailable = MB_DSInit();
LogFileOutput("MB_Initialize: MB_DSInit(), g_bMBAvailable=%d\n", g_bMBAvailable);
MB_Reset(true);
LogFileOutput("MB_Initialize: MB_Reset()\n");
}
for (int id=0; id<kNumSyncEvents; id++)
{
g_syncEvent[id] = new SyncEvent(id, 0, MB_SyncEventCallback);
}
}
static void MB_SetSoundcardType(SS_CARDTYPE NewSoundcardType);
// NB. Mockingboard voice is *already* muted because showing 'Select Load State file' dialog
// . and voice will be unmuted when dialog is closed
void MB_InitializeForLoadingSnapshot() // GH#609
{
MB_Reset(true);
InitSoundcardType();
if (g_bDisableDirectSound || g_bDisableDirectSoundMockingboard)
return;
_ASSERT(MockingboardVoice.lpDSBvoice);
DSVoiceStop(&MockingboardVoice); // Reason: 'MB voice is playing' then loading a save-state where 'no MB present'
// NB. ssi263.Stop() already done by MB_Reset()
}
//-----------------------------------------------------------------------------
// NB. Called when /g_fCurrentCLK6502/ changes
void MB_Reinitialize()
{
AY8910_InitClock((int)g_fCurrentCLK6502); // todo: account for g_PhasorClockScaleFactor?
// NB. Other calls to AY8910_InitClock() use the constant CLK_6502
}
//-----------------------------------------------------------------------------
void MB_Destroy()
{
MB_DSUninit();
for (int i=0; i<NUM_VOICES; i++)
delete [] ppAYVoiceBuffer[i];
for (int id=0; id<kNumSyncEvents; id++)
{
if (g_syncEvent[id] && g_syncEvent[id]->m_active)
g_SynchronousEventMgr.Remove(id);
delete g_syncEvent[id];
g_syncEvent[id] = NULL;
}
}
//-----------------------------------------------------------------------------
static void ResetState()
{
g_nMBTimerDevice = kTIMERDEVICE_INVALID;
MB_SetCumulativeCycles();
g_nMB_InActiveCycleCount = 0;
g_bMB_RegAccessedFlag = false;
g_bMB_Active = false;
g_phasorMode = PH_Mockingboard;
g_PhasorClockScaleFactor = 1;
g_uLastMBUpdateCycle = 0;
g_cyclesThisAudioFrame = 0;
for (int id = 0; id < kNumSyncEvents; id++)
{
if (g_syncEvent[id] && g_syncEvent[id]->m_active)
g_SynchronousEventMgr.Remove(id);
}
for (UINT i=0; i<NUM_AY8910; i++)
{
g_MB[i].ssi263.SetCardMode(g_phasorMode);
g_MB[i].ssi263.Reset();
}
// Not these, as they don't change on a CTRL+RESET or power-cycle:
// g_bMBAvailable = false;
// g_SoundcardType = CT_Empty; // Don't uncomment, else _ASSERT will fire in MB_Read() after an F2->MB_Reset()
// g_bPhasorEnable = false;
}
void MB_Reset(const bool powerCycle) // CTRL+RESET or power-cycle
{
if (!g_bDSAvailable)
return;
for (int i=0; i<NUM_AY8910; i++)
{
ResetSY6522(&g_MB[i], powerCycle);
AY8910_reset(i);
}
ResetState();
MB_Reinitialize(); // Reset CLK for AY8910s
}
//-----------------------------------------------------------------------------
// Echo+ mode - Phasor's 2nd 6522 is mapped to every 16-byte offset in $Cnxx (Echo+ has a single 6522 controlling two AY-3-8913's)
static BYTE __stdcall MB_Read(WORD PC, WORD nAddr, BYTE bWrite, BYTE nValue, ULONG nExecutedCycles)
{
MB_UpdateCycles(nExecutedCycles);
#ifdef _DEBUG
if(!IS_APPLE2 && MemCheckINTCXROM())
{
_ASSERT(0); // Card ROM disabled, so IO_Cxxx() returns the internal ROM
return mem[nAddr];
}
if(g_SoundcardType == CT_Empty)
{
_ASSERT(0); // Card unplugged, so IO_Cxxx() returns the floating bus
return MemReadFloatingBus(nExecutedCycles);
}
#endif
BYTE nMB = (nAddr>>8)&0xf - SLOT4;
BYTE nOffset = nAddr&0xff;
if(g_bPhasorEnable)
{
if(nMB != 0) // Slot4 only
return MemReadFloatingBus(nExecutedCycles);
int CS = 0;
if (g_phasorMode == PH_Mockingboard)
CS = ( ( nAddr & 0x80 ) >> 7 ) + 1; // 1 or 2
else if (g_phasorMode == PH_Phasor)
CS = ( ( nAddr & 0x80 ) >> 6 ) | ( ( nAddr & 0x10 ) >> 4 ); // 0, 1, 2 or 3
else if (g_phasorMode == PH_EchoPlus)
CS = 2;
BYTE nRes = 0;
if(CS & 1)
nRes |= SY6522_Read(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_A, nAddr&0xf);
if(CS & 2)
nRes |= SY6522_Read(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_B, nAddr&0xf);
bool bAccessedDevice = (CS & 3) ? true : false;
bool CS_SSI263 = !(nAddr & 0x80) && (nAddr & 0x60); // SSI263 at $Cn2x and/or $Cn4x
if (g_phasorMode == PH_Phasor && CS_SSI263) // NB. Mockingboard mode: SSI263.bit7 not readable
{
_ASSERT(!bAccessedDevice);
if (nAddr & 0x40) // Primary SSI263
nRes = g_MB[nMB*2+1].ssi263.Read(nExecutedCycles); // SSI263 only drives bit7
if (nAddr & 0x20) // Secondary SSI263
nRes = g_MB[nMB*2+0].ssi263.Read(nExecutedCycles); // SSI263 only drives bit7
bAccessedDevice = true;
}
return bAccessedDevice ? nRes : MemReadFloatingBus(nExecutedCycles);
}
#if DBG_MB_SS_CARD
if (nMB == 1)
return MemReadFloatingBus(nExecutedCycles);
#endif
// NB. Mockingboard: SSI263.bit7 not readable (TODO: check this with real h/w)
if (nOffset < SY6522B_Offset)
return SY6522_Read(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_A, nAddr&0xf);
else
return SY6522_Read(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_B, nAddr&0xf);
}
//-----------------------------------------------------------------------------
static BYTE __stdcall MB_Write(WORD PC, WORD nAddr, BYTE bWrite, BYTE nValue, ULONG nExecutedCycles)
{
MB_UpdateCycles(nExecutedCycles);
#ifdef _DEBUG
if(!IS_APPLE2 && MemCheckINTCXROM())
{
_ASSERT(0); // Card ROM disabled, so IO_Cxxx() returns the internal ROM
return 0;
}
if(g_SoundcardType == CT_Empty)
{
_ASSERT(0); // Card unplugged, so IO_Cxxx() returns the floating bus
return 0;
}
#endif
// Support 6502/65C02 false-reads of 6522 (GH#52)
if ( ((mem[(PC-2)&0xffff] == 0x91) && GetMainCpu() == CPU_6502) || // sta (zp),y - 6502 only (no-PX variant only) (UTAIIe:4-23)
(mem[(PC-3)&0xffff] == 0x99) || // sta abs16,y - 6502/65C02, but for 65C02 only the no-PX variant that does the false-read (UTAIIe:4-27)
(mem[(PC-3)&0xffff] == 0x9D) ) // sta abs16,x - 6502/65C02, but for 65C02 only the no-PX variant that does the false-read (UTAIIe:4-27)
{
WORD base;
WORD addr16;
if (mem[(PC-2)&0xffff] == 0x91)
{
BYTE zp = mem[(PC-1)&0xffff];
base = (mem[zp] | (mem[(zp+1)&0xff]<<8));
addr16 = base + regs.y;
}
else
{
base = mem[(PC-2)&0xffff] | (mem[(PC-1)&0xffff]<<8);
addr16 = base + ((mem[(PC-3)&0xffff] == 0x99) ? regs.y : regs.x);
}
if (((base ^ addr16) >> 8) == 0) // Only the no-PX variant does the false read (to the same I/O SELECT page)
{
_ASSERT(addr16 == nAddr);
if (addr16 == nAddr) // Check we've reverse looked-up the 6502 opcode correctly
{
if ( ((nAddr&0xf) == 4) || ((nAddr&0xf) == 8) ) // Only reading 6522 reg-4 or reg-8 actually has an effect
MB_Read(PC, nAddr, 0, 0, nExecutedCycles);
}
}
}
BYTE nMB = ((nAddr>>8)&0xf) - SLOT4;
BYTE nOffset = nAddr&0xff;
if(g_bPhasorEnable)
{
if(nMB != 0) // Slot4 only
return 0;
int CS = 0;
if (g_phasorMode == PH_Mockingboard)
CS = ( ( nAddr & 0x80 ) >> 7 ) + 1; // 1 or 2
else if (g_phasorMode == PH_Phasor)
CS = ( ( nAddr & 0x80 ) >> 6 ) | ( ( nAddr & 0x10 ) >> 4 ); // 0, 1, 2 or 3
else if (g_phasorMode == PH_EchoPlus)
CS = 2;
if(CS & 1)
SY6522_Write(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_A, nAddr&0xf, nValue);
if(CS & 2)
SY6522_Write(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_B, nAddr&0xf, nValue);
bool CS_SSI263 = !(nAddr & 0x80) && (nAddr & 0x60); // SSI263 at $Cn2x and/or $Cn4x
if ((g_phasorMode == PH_Mockingboard || g_phasorMode == PH_Phasor) && CS_SSI263) // No SSI263 for Echo+
{
// NB. Mockingboard mode: writes to $Cn4x/SSI263 also get written to 1st 6522 (have confirmed on real Phasor h/w)
_ASSERT( (g_phasorMode == PH_Mockingboard && (CS==0 || CS==1)) || (g_phasorMode == PH_Phasor && (CS==0)) );
if (nAddr & 0x40) // Primary SSI263
g_MB[nMB*2+1].ssi263.Write(nAddr&0x7, nValue); // 2nd 6522 is used for 1st speech chip
if (nAddr & 0x20) // Secondary SSI263
g_MB[nMB*2+0].ssi263.Write(nAddr&0x7, nValue); // 1st 6522 is used for 2nd speech chip
}
return 0;
}
if (nOffset < SY6522B_Offset)
SY6522_Write(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_A, nAddr&0xf, nValue);
else
SY6522_Write(nMB*NUM_DEVS_PER_MB + SY6522_DEVICE_B, nAddr&0xf, nValue);
#if !DBG_MB_SS_CARD
if (nAddr & 0x40)
g_MB[nMB*2+1].ssi263.Write(nAddr&0x7, nValue); // 2nd 6522 is used for 1st speech chip
if (nAddr & 0x20)
g_MB[nMB*2+0].ssi263.Write(nAddr&0x7, nValue); // 1st 6522 is used for 2nd speech chip
#endif
return 0;
}
//-----------------------------------------------------------------------------
// Phasor's DEVICE SELECT' logic:
// . if addr.[b3]==1, then clear the card's mode bits b2:b0
// . if any of addr.[b2:b0] are a logic 1, then set these bits in the card's mode
//
// Example DEVICE SELECT' accesses for Phasor in slot-4: (from empirical observations on real Phasor h/w)
// 1)
// . RESET -> Mockingboard mode (b#000)
// . $C0C5 -> Phasor mode (b#101)
// 2)
// . RESET -> Mockingboard mode (b#000)
// . $C0C1, then $C0C4 (or $C0C4, then $C0C1) -> Phasor mode (b#101)
// . $C0C2 -> Echo+ mode (b#111)
// . $C0C5 -> remaining in Echo+ mode (b#111)
// So $C0C5 seemingly results in 2 different modes.
//
static BYTE __stdcall PhasorIO(WORD PC, WORD nAddr, BYTE bWrite, BYTE nValue, ULONG nExecutedCycles)
{
if (!g_bPhasorEnable)
return MemReadFloatingBus(nExecutedCycles);
UINT bits = (UINT) g_phasorMode;
if (nAddr & 8)
bits = 0;
bits |= (nAddr & 7);
g_phasorMode = (PHASOR_MODE) bits;
if (g_phasorMode == PH_Mockingboard || g_phasorMode == PH_EchoPlus)
g_PhasorClockScaleFactor = 1;
else if (g_phasorMode == PH_Phasor)
g_PhasorClockScaleFactor = 2;
AY8910_InitClock((int)(Get6502BaseClock() * g_PhasorClockScaleFactor));
for (UINT i=0; i<NUM_AY8910; i++)
g_MB[i].ssi263.SetCardMode(g_phasorMode);
return MemReadFloatingBus(nExecutedCycles);
}
//-----------------------------------------------------------------------------
SS_CARDTYPE MB_GetSoundcardType()
{
return g_SoundcardType;
}
static void MB_SetSoundcardType(const SS_CARDTYPE NewSoundcardType)
{
if (NewSoundcardType == g_SoundcardType)
return;
if (NewSoundcardType == CT_Empty)
MB_Mute(); // Call MB_Mute() before setting g_SoundcardType = CT_Empty
g_SoundcardType = NewSoundcardType;
g_bPhasorEnable = (g_SoundcardType == CT_Phasor);
}
//-----------------------------------------------------------------------------
void MB_InitializeIO(LPBYTE pCxRomPeripheral, UINT uSlot4, UINT uSlot5)
{
// Mockingboard: Slot 4 & 5
// Phasor : Slot 4
// <other> : Slot 4 & 5
if (GetCardMgr().QuerySlot(SLOT4) != CT_MockingboardC && GetCardMgr().QuerySlot(SLOT4) != CT_Phasor)
{
MB_SetSoundcardType(CT_Empty);
return;
}
if (GetCardMgr().QuerySlot(SLOT4) == CT_MockingboardC)
RegisterIoHandler(uSlot4, IO_Null, IO_Null, MB_Read, MB_Write, NULL, NULL);
else // Phasor
RegisterIoHandler(uSlot4, PhasorIO, PhasorIO, MB_Read, MB_Write, NULL, NULL);
if (GetCardMgr().QuerySlot(SLOT5) == CT_MockingboardC)
RegisterIoHandler(uSlot5, IO_Null, IO_Null, MB_Read, MB_Write, NULL, NULL);
MB_SetSoundcardType(GetCardMgr().QuerySlot(SLOT4));
if (g_bDisableDirectSound || g_bDisableDirectSoundMockingboard)
return;
// Sound buffer may have been stopped by MB_InitializeForLoadingSnapshot().
// NB. DSZeroVoiceBuffer() also zeros the sound buffer, so it's better than directly calling IDirectSoundBuffer::Play():
// - without zeroing, then the previous sound buffer can be heard for a fraction of a second
// - eg. when doing Mockingboard playback, then loading a save-state which is also doing Mockingboard playback
DSZeroVoiceBuffer(&MockingboardVoice, g_dwDSBufferSize);
}
//-----------------------------------------------------------------------------
void MB_Mute(void)
{
if(g_SoundcardType == CT_Empty)
return;
if(MockingboardVoice.bActive && !MockingboardVoice.bMute)
{
MockingboardVoice.lpDSBvoice->SetVolume(DSBVOLUME_MIN);
MockingboardVoice.bMute = true;
}
for (UINT i=0; i<NUM_AY8910; i++)
g_MB[i].ssi263.Mute();
}
//-----------------------------------------------------------------------------
void MB_Unmute(void)
{
if(g_SoundcardType == CT_Empty)
return;
if(MockingboardVoice.bActive && MockingboardVoice.bMute)
{
MockingboardVoice.lpDSBvoice->SetVolume(MockingboardVoice.nVolume);
MockingboardVoice.bMute = false;
}
for (UINT i=0; i<NUM_AY8910; i++)
g_MB[i].ssi263.Unmute();
}
//-----------------------------------------------------------------------------
#ifdef _DEBUG
void MB_CheckCumulativeCycles()
{
if (g_SoundcardType == CT_Empty)
return;
_ASSERT(g_uLastCumulativeCycles == g_nCumulativeCycles);
g_uLastCumulativeCycles = g_nCumulativeCycles;
}
#endif
// Called by: ResetState() and Snapshot_LoadState_v2()
void MB_SetCumulativeCycles()
{
g_uLastCumulativeCycles = g_nCumulativeCycles;
}
// Called by ContinueExecution() at the end of every execution period (~1000 cycles or ~3 cycle when MODE_STEPPING)
// NB. Required for FT's TEST LAB #1 player
void MB_PeriodicUpdate(UINT executedCycles)
{
if (g_SoundcardType == CT_Empty)
return;
for (UINT i=0; i<NUM_AY8910; i++)
g_MB[i].ssi263.PeriodicUpdate(executedCycles);
if (g_nMBTimerDevice != kTIMERDEVICE_INVALID)
return;
const UINT kCyclesPerAudioFrame = 1000;
g_cyclesThisAudioFrame += executedCycles;
if (g_cyclesThisAudioFrame < kCyclesPerAudioFrame)
return;
g_cyclesThisAudioFrame %= kCyclesPerAudioFrame;
MB_Update();
}
//-----------------------------------------------------------------------------
static bool CheckTimerUnderflow(USHORT& counter, int& timerIrqDelay, const USHORT nClocks)
{
if (nClocks == 0)
return false;
int oldTimer = counter;
int timer = counter;
timer -= nClocks;
counter = (USHORT)timer;
bool timerIrq = false;
if (timerIrqDelay) // Deal with any previous counter underflow which didn't yet result in an IRQ
{
_ASSERT(timerIrqDelay == 1);
timerIrqDelay = 0;
timerIrq = true;
// if LATCH is very small then could underflow for every opcode...
}
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
}
return timerIrq;
}
static int OnTimer1Underflow(USHORT& counter, USHORT latch)
{
int timer = (int)(short)(counter);
while (timer < -1)
timer += (latch + kExtraTimerCycles); // GH#651: account for underflowed cycles / GH#652: account for extra 2 cycles
counter = (USHORT)timer;
return (timer == -1) ? 1 : 0; // timer1IrqDelay
}
// Called by:
// . CpuExecute() every ~1000 cycles @ 1MHz
// . MB_SyncEventCallback() on a TIMER1/2 underflow
// . MB_Read() / MB_Write() (for both normal & full-speed)
void MB_UpdateCycles(ULONG uExecutedCycles)
{
if (g_SoundcardType == CT_Empty)
return;
CpuCalcCycles(uExecutedCycles);
UINT64 uCycles = g_nCumulativeCycles - g_uLastCumulativeCycles;
_ASSERT(uCycles >= 0);
if (uCycles == 0)
return;
g_uLastCumulativeCycles = g_nCumulativeCycles;
_ASSERT(uCycles < 0x10000 || g_nAppMode == MODE_BENCHMARK);
USHORT nClocks = (USHORT)uCycles;
for (int i = 0; i < NUM_SY6522; i++)
{
SY6522_AY8910* pMB = &g_MB[i];
const bool bTimer1Underflow = CheckTimerUnderflow(pMB->sy6522.TIMER1_COUNTER.w, pMB->sy6522.timer1IrqDelay, nClocks);
if (bTimer1Underflow)
pMB->sy6522.timer1IrqDelay = OnTimer1Underflow(pMB->sy6522.TIMER1_COUNTER.w, pMB->sy6522.TIMER1_LATCH.w);
// No TIMER2 latch so "after timing out, the counter will continue to decrement"
CheckTimerUnderflow(pMB->sy6522.TIMER2_COUNTER.w, pMB->sy6522.timer2IrqDelay, nClocks);
}
}
//-----------------------------------------------------------------------------
static int MB_SyncEventCallback(int id, int /*cycles*/, ULONG uExecutedCycles)
{
SY6522_AY8910* pMB = &g_MB[id / kNumTimersPer6522];
if ((id & 1) == 0)
{
_ASSERT(pMB->bTimer1Active);
MB_Update();
UpdateIFR(pMB, 0, IxR_TIMER1);
MB_UpdateCycles(uExecutedCycles);
if ((pMB->sy6522.ACR & RUNMODE) == RM_ONESHOT)
{
// One-shot mode
// - Phasor's playback code uses one-shot mode
StopTimer1(pMB);
return 0; // Don't repeat event
}
StartTimer1(pMB);
return pMB->sy6522.TIMER1_COUNTER.w + kExtraTimerCycles;
}
else
{
_ASSERT(pMB->bTimer2Active);
UpdateIFR(pMB, 0, IxR_TIMER2);
StopTimer2(pMB); // TIMER2 only runs in one-shot mode
return 0; // Don't repeat event
}
}
//-----------------------------------------------------------------------------
bool MB_IsActive()
{
if (!MockingboardVoice.bActive)
return false;
bool isSSI263Active = false;
for (UINT i=0; i<NUM_AY8910; i++)
isSSI263Active |= g_MB[i].ssi263.IsPhonemeActive();
return g_bMB_Active || isSSI263Active;
}
//-----------------------------------------------------------------------------
DWORD MB_GetVolume()
{
return MockingboardVoice.dwUserVolume;
}
void MB_SetVolume(DWORD dwVolume, DWORD dwVolumeMax)
{
MockingboardVoice.dwUserVolume = dwVolume;
MockingboardVoice.nVolume = NewVolume(dwVolume, dwVolumeMax);
if (MockingboardVoice.bActive && !MockingboardVoice.bMute)
MockingboardVoice.lpDSBvoice->SetVolume(MockingboardVoice.nVolume);
//
for (UINT i=0; i<NUM_AY8910; i++)
g_MB[i].ssi263.SetVolume(dwVolume, dwVolumeMax);
}
//---------------------------------------------------------------------------
// Called from class SSI263
UINT64 MB_GetLastCumulativeCycles(void)
{
return g_uLastCumulativeCycles;
}
void MB_UpdateIFR(BYTE nDevice, BYTE clr_mask, BYTE set_mask)
{
SY6522_AY8910* pMB = &g_MB[nDevice];
UpdateIFR(pMB, clr_mask, set_mask);
}
BYTE MB_GetPCR(BYTE nDevice)
{
return g_MB[nDevice].sy6522.PCR;
}
//===========================================================================
// Called by debugger - Debugger_Display.cpp
void MB_GetSnapshot_v1(SS_CARD_MOCKINGBOARD_v1* const pSS, const DWORD dwSlot)
{
pSS->Hdr.UnitHdr.hdr.v2.Length = sizeof(SS_CARD_MOCKINGBOARD_v1);
pSS->Hdr.UnitHdr.hdr.v2.Type = UT_Card;
pSS->Hdr.UnitHdr.hdr.v2.Version = 1;
pSS->Hdr.Slot = dwSlot;
pSS->Hdr.Type = CT_MockingboardC;
UINT nMbCardNum = dwSlot - SLOT4;
UINT nDeviceNum = nMbCardNum*2;
SY6522_AY8910* pMB = &g_MB[nDeviceNum];
for (UINT i=0; i<MB_UNITS_PER_CARD_v1; i++)
{
// 6522
{
BYTE* d = (BYTE*) &pSS->Unit[i].RegsSY6522;
BYTE* s = (BYTE*) &pMB->sy6522;
for (UINT j=0; j<=9; j++) // regs $00-$09
*d++ = *s++;
s = &pMB->sy6522.SERIAL_SHIFT;
for (UINT j=0; j<=6; j++) // regs $0A-$0F
*d++ = *s++;
}
// AY8913
for (UINT j=0; j<16; j++)
{
pSS->Unit[i].RegsAY8910[j] = AYReadReg(nDeviceNum, j);
}
memset(&pSS->Unit[i].RegsSSI263, 0, sizeof(SSI263A)); // Not used by debugger
pSS->Unit[i].nAYCurrentRegister = pMB->nAYCurrentRegister;
pSS->Unit[i].bTimer1Active = pMB->bTimer1Active;
pSS->Unit[i].bTimer2Active = pMB->bTimer2Active;
pSS->Unit[i].bSpeechIrqPending = false;
nDeviceNum++;
pMB++;
}
}
//=============================================================================
// Unit version history:
// 2: Added: Timer1 & Timer2 active
// 3: Added: Unit state - GH#320
// 4: Added: 6522 timerIrqDelay - GH#652
// 5: Added: Unit state-B (Phasor only) - GH#659
// 6: Changed SS_YAML_KEY_PHASOR_MODE from (0,1) to (0,5,7)
// Added SS_YAML_KEY_VOTRAX_PHONEME
// Removed: redundant SS_YAML_KEY_PHASOR_CLOCK_SCALE_FACTOR
// 7: Added SS_YAML_KEY_SSI263_REG_ACTIVE_PHONEME to SSI263 sub-unit
const UINT kUNIT_VERSION = 7;
const UINT NUM_MB_UNITS = 2;
const UINT NUM_PHASOR_UNITS = 2;
#define SS_YAML_KEY_MB_UNIT "Unit"
#define SS_YAML_KEY_SY6522 "SY6522"
#define SS_YAML_KEY_SY6522_REG_ORB "ORB"
#define SS_YAML_KEY_SY6522_REG_ORA "ORA"
#define SS_YAML_KEY_SY6522_REG_DDRB "DDRB"
#define SS_YAML_KEY_SY6522_REG_DDRA "DDRA"
#define SS_YAML_KEY_SY6522_REG_T1_COUNTER "Timer1 Counter"
#define SS_YAML_KEY_SY6522_REG_T1_LATCH "Timer1 Latch"
#define SS_YAML_KEY_SY6522_REG_T2_COUNTER "Timer2 Counter"
#define SS_YAML_KEY_SY6522_REG_T2_LATCH "Timer2 Latch"
#define SS_YAML_KEY_SY6522_REG_SERIAL_SHIFT "Serial Shift"
#define SS_YAML_KEY_SY6522_REG_ACR "ACR"
#define SS_YAML_KEY_SY6522_REG_PCR "PCR"
#define SS_YAML_KEY_SY6522_REG_IFR "IFR"
#define SS_YAML_KEY_SY6522_REG_IER "IER"
#define SS_YAML_KEY_AY_CURR_REG "AY Current Register"
#define SS_YAML_KEY_MB_UNIT_STATE "Unit State"
#define SS_YAML_KEY_MB_UNIT_STATE_B "Unit State-B" // Phasor only
#define SS_YAML_KEY_TIMER1_IRQ "Timer1 IRQ Pending"
#define SS_YAML_KEY_TIMER2_IRQ "Timer2 IRQ Pending"
#define SS_YAML_KEY_SPEECH_IRQ "Speech IRQ Pending"
#define SS_YAML_KEY_TIMER1_ACTIVE "Timer1 Active"
#define SS_YAML_KEY_TIMER2_ACTIVE "Timer2 Active"
#define SS_YAML_KEY_SY6522_TIMER1_IRQ_DELAY "Timer1 IRQ Delay"
#define SS_YAML_KEY_SY6522_TIMER2_IRQ_DELAY "Timer2 IRQ Delay"
#define SS_YAML_KEY_PHASOR_UNIT "Unit"
#define SS_YAML_KEY_PHASOR_CLOCK_SCALE_FACTOR "Clock Scale Factor" // Redundant from v6
#define SS_YAML_KEY_PHASOR_MODE "Mode"
#define SS_YAML_KEY_VOTRAX_PHONEME "Votrax Phoneme"
std::string MB_GetSnapshotCardName(void)
{
static const std::string name("Mockingboard C");
return name;
}
std::string Phasor_GetSnapshotCardName(void)
{
static const std::string name("Phasor");
return name;
}
static void SaveSnapshotSY6522(YamlSaveHelper& yamlSaveHelper, SY6522& sy6522)
{
YamlSaveHelper::Label label(yamlSaveHelper, "%s:\n", SS_YAML_KEY_SY6522);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_ORB, sy6522.ORB);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_ORA, sy6522.ORA);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_DDRB, sy6522.DDRB);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_DDRA, sy6522.DDRA);
yamlSaveHelper.SaveHexUint16(SS_YAML_KEY_SY6522_REG_T1_COUNTER, sy6522.TIMER1_COUNTER.w);
yamlSaveHelper.SaveHexUint16(SS_YAML_KEY_SY6522_REG_T1_LATCH, sy6522.TIMER1_LATCH.w);
yamlSaveHelper.SaveUint(SS_YAML_KEY_SY6522_TIMER1_IRQ_DELAY, sy6522.timer1IrqDelay); // v4
yamlSaveHelper.SaveHexUint16(SS_YAML_KEY_SY6522_REG_T2_COUNTER, sy6522.TIMER2_COUNTER.w);
yamlSaveHelper.SaveHexUint16(SS_YAML_KEY_SY6522_REG_T2_LATCH, sy6522.TIMER2_LATCH.w);
yamlSaveHelper.SaveUint(SS_YAML_KEY_SY6522_TIMER2_IRQ_DELAY, sy6522.timer2IrqDelay); // v4
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_SERIAL_SHIFT, sy6522.SERIAL_SHIFT);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_ACR, sy6522.ACR);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_PCR, sy6522.PCR);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_IFR, sy6522.IFR);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_SY6522_REG_IER, sy6522.IER);
// NB. No need to write ORA_NO_HS, since same data as ORA, just without handshake
}
void MB_SaveSnapshot(YamlSaveHelper& yamlSaveHelper, const UINT uSlot)
{
const UINT nMbCardNum = uSlot - SLOT4;
UINT nDeviceNum = nMbCardNum*2;
SY6522_AY8910* pMB = &g_MB[nDeviceNum];
YamlSaveHelper::Slot slot(yamlSaveHelper, MB_GetSnapshotCardName(), uSlot, kUNIT_VERSION); // fixme: object should be just 1 Mockingboard card & it will know its slot
YamlSaveHelper::Label state(yamlSaveHelper, "%s:\n", SS_YAML_KEY_STATE);
yamlSaveHelper.SaveBool(SS_YAML_KEY_VOTRAX_PHONEME, pMB->ssi263.GetVotraxPhoneme());
for(UINT i=0; i<NUM_MB_UNITS; i++)
{
YamlSaveHelper::Label unit(yamlSaveHelper, "%s%d:\n", SS_YAML_KEY_MB_UNIT, i);
SaveSnapshotSY6522(yamlSaveHelper, pMB->sy6522);
AY8910_SaveSnapshot(yamlSaveHelper, nDeviceNum, std::string(""));
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.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER1_IRQ, "false");
yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER2_IRQ, "false");
yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_SPEECH_IRQ, "false");
yamlSaveHelper.SaveBool(SS_YAML_KEY_TIMER1_ACTIVE, pMB->bTimer1Active);
yamlSaveHelper.SaveBool(SS_YAML_KEY_TIMER2_ACTIVE, pMB->bTimer2Active);
nDeviceNum++;
pMB++;
}
}
static void LoadSnapshotSY6522(YamlLoadHelper& yamlLoadHelper, SY6522& sy6522, UINT version)
{
if (!yamlLoadHelper.GetSubMap(SS_YAML_KEY_SY6522))
throw std::string("Card: Expected key: ") + std::string(SS_YAML_KEY_SY6522);
sy6522.ORB = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_ORB);
sy6522.ORA = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_ORA);
sy6522.DDRB = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_DDRB);
sy6522.DDRA = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_DDRA);
sy6522.TIMER1_COUNTER.w = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_T1_COUNTER);
sy6522.TIMER1_LATCH.w = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_T1_LATCH);
sy6522.TIMER2_COUNTER.w = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_T2_COUNTER);
sy6522.TIMER2_LATCH.w = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_T2_LATCH);
sy6522.SERIAL_SHIFT = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_SERIAL_SHIFT);
sy6522.ACR = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_ACR);
sy6522.PCR = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_PCR);
sy6522.IFR = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_IFR);
sy6522.IER = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_REG_IER);
sy6522.ORA_NO_HS = 0; // Not saved
sy6522.timer1IrqDelay = sy6522.timer2IrqDelay = 0;
if (version >= 4)
{
sy6522.timer1IrqDelay = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_TIMER1_IRQ_DELAY);
sy6522.timer2IrqDelay = yamlLoadHelper.LoadUint(SS_YAML_KEY_SY6522_TIMER2_IRQ_DELAY);
}
if (version < 7)
{
// Assume t1_latch was never written to (so had the old default of 0x0000) - this now results in failure of Mockingboard detection!
if (sy6522.TIMER1_LATCH.w == 0x0000)
sy6522.TIMER1_LATCH.w = 0xFFFF; // Allow Mockingboard detection to succeed
}
yamlLoadHelper.PopMap();
}
bool MB_LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version)
{
if (slot != 4 && slot != 5) // fixme
throw std::string("Card: wrong slot");
if (version < 1 || version > kUNIT_VERSION)
throw std::string("Card: wrong version");
AY8910UpdateSetCycles();
const UINT nMbCardNum = slot - SLOT4;
UINT nDeviceNum = nMbCardNum*2;
SY6522_AY8910* pMB = &g_MB[nDeviceNum];
bool isVotrax = (version >= 6) ? yamlLoadHelper.LoadBool(SS_YAML_KEY_VOTRAX_PHONEME) : false;
pMB->ssi263.SetVotraxPhoneme(isVotrax);
for(UINT i=0; i<NUM_MB_UNITS; i++)
{
char szNum[2] = {char('0' + i), 0};
std::string unit = std::string(SS_YAML_KEY_MB_UNIT) + std::string(szNum);
if (!yamlLoadHelper.GetSubMap(unit))
throw std::string("Card: Expected key: ") + std::string(unit);
LoadSnapshotSY6522(yamlLoadHelper, pMB->sy6522, version);
UpdateIFR(pMB, 0, pMB->sy6522.IFR); // Assert any pending IRQs (GH#677)
AY8910_LoadSnapshot(yamlLoadHelper, nDeviceNum, std::string(""));
pMB->ssi263.LoadSnapshot(yamlLoadHelper, nDeviceNum, PH_Mockingboard, version); // Pre: SetVotraxPhoneme()
pMB->nAYCurrentRegister = yamlLoadHelper.LoadUint(SS_YAML_KEY_AY_CURR_REG);
yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER1_IRQ); // Consume
yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER2_IRQ); // Consume
yamlLoadHelper.LoadBool(SS_YAML_KEY_SPEECH_IRQ); // Consume
if (version >= 2)
{
pMB->bTimer1Active = yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER1_ACTIVE);
pMB->bTimer2Active = yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER2_ACTIVE);
}
pMB->state = AY_INACTIVE;
pMB->stateB = AY_INACTIVE;
if (version >= 3)
pMB->state = (MockingboardUnitState_e) (yamlLoadHelper.LoadUint(SS_YAML_KEY_MB_UNIT_STATE) & 7);
yamlLoadHelper.PopMap();
//
if (version == 1)
{
StartTimer1_LoadStateV1(pMB); // Attempt to start timer
}
else // version >= 2
{
if (pMB->bTimer1Active)
StartTimer1(pMB); // Attempt to start timer
}
if (pMB->bTimer1Active)
{
const UINT id = nDeviceNum*kNumTimersPer6522+0; // TIMER1
SyncEvent* pSyncEvent = g_syncEvent[id];
pSyncEvent->SetCycles(pMB->sy6522.TIMER1_COUNTER.w + kExtraTimerCycles); // NB. use COUNTER, not LATCH
g_SynchronousEventMgr.Insert(pSyncEvent);
}
if (pMB->bTimer2Active)
{
const UINT id = nDeviceNum*kNumTimersPer6522+1; // TIMER2
SyncEvent* pSyncEvent = g_syncEvent[id];
pSyncEvent->SetCycles(pMB->sy6522.TIMER2_COUNTER.w + kExtraTimerCycles); // NB. use COUNTER, not LATCH
g_SynchronousEventMgr.Insert(pSyncEvent);
}
nDeviceNum++;
pMB++;
}
AY8910_InitClock((int)Get6502BaseClock());
// NB. g_SoundcardType & g_bPhasorEnable setup in MB_InitializeIO() -> MB_SetSoundcardType()
return true;
}
void Phasor_SaveSnapshot(YamlSaveHelper& yamlSaveHelper, const UINT uSlot)
{
if (uSlot != 4)
throw std::string("Card: Phasor only supported in slot-4");
UINT nDeviceNum = 0;
SY6522_AY8910* pMB = &g_MB[0]; // fixme: Phasor uses MB's slot4(2x6522), slot4(2xSSI263), but slot4+5(4xAY8910)
YamlSaveHelper::Slot slot(yamlSaveHelper, Phasor_GetSnapshotCardName(), uSlot, kUNIT_VERSION); // fixme: object should be just 1 Mockingboard card & it will know its slot
YamlSaveHelper::Label state(yamlSaveHelper, "%s:\n", SS_YAML_KEY_STATE);
yamlSaveHelper.SaveUint(SS_YAML_KEY_PHASOR_MODE, g_phasorMode);
yamlSaveHelper.SaveBool(SS_YAML_KEY_VOTRAX_PHONEME, pMB->ssi263.GetVotraxPhoneme());
for(UINT i=0; i<NUM_PHASOR_UNITS; i++)
{
YamlSaveHelper::Label unit(yamlSaveHelper, "%s%d:\n", SS_YAML_KEY_PHASOR_UNIT, i);
SaveSnapshotSY6522(yamlSaveHelper, pMB->sy6522);
AY8910_SaveSnapshot(yamlSaveHelper, nDeviceNum+0, std::string("-A"));
AY8910_SaveSnapshot(yamlSaveHelper, nDeviceNum+1, std::string("-B"));
pMB->ssi263.SaveSnapshot(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.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER1_IRQ, "false");
yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_TIMER2_IRQ, "false");
yamlSaveHelper.Save("%s: %s # Not supported\n", SS_YAML_KEY_SPEECH_IRQ, "false");
yamlSaveHelper.SaveBool(SS_YAML_KEY_TIMER1_ACTIVE, pMB->bTimer1Active);
yamlSaveHelper.SaveBool(SS_YAML_KEY_TIMER2_ACTIVE, pMB->bTimer2Active);
nDeviceNum += 2;
pMB++;
}
}
bool Phasor_LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version)
{
if (slot != 4) // fixme
throw std::string("Card: wrong slot");
if (version < 1 || version > kUNIT_VERSION)
throw std::string("Card: wrong version");
if (version < 6)
yamlLoadHelper.LoadUint(SS_YAML_KEY_PHASOR_CLOCK_SCALE_FACTOR); // Consume redundant data
UINT phasorMode = yamlLoadHelper.LoadUint(SS_YAML_KEY_PHASOR_MODE);
if (version < 6)
{
if (phasorMode == 0)
phasorMode = PH_Mockingboard;
else
phasorMode = PH_Phasor;
}
g_phasorMode = (PHASOR_MODE) phasorMode;
g_PhasorClockScaleFactor = (g_phasorMode == PH_Phasor) ? 2 : 1;
AY8910UpdateSetCycles();
UINT nDeviceNum = 0;
SY6522_AY8910* pMB = &g_MB[0];
bool isVotrax = (version >= 6) ? yamlLoadHelper.LoadBool(SS_YAML_KEY_VOTRAX_PHONEME) : false;
pMB->ssi263.SetVotraxPhoneme(isVotrax);
for(UINT i=0; i<NUM_PHASOR_UNITS; i++)
{
char szNum[2] = {char('0' + i), 0};
std::string unit = std::string(SS_YAML_KEY_MB_UNIT) + std::string(szNum);
if (!yamlLoadHelper.GetSubMap(unit))
throw std::string("Card: Expected key: ") + std::string(unit);
LoadSnapshotSY6522(yamlLoadHelper, pMB->sy6522, version);
UpdateIFR(pMB, 0, pMB->sy6522.IFR); // Assert any pending IRQs (GH#677)
AY8910_LoadSnapshot(yamlLoadHelper, nDeviceNum+0, std::string("-A"));
AY8910_LoadSnapshot(yamlLoadHelper, nDeviceNum+1, std::string("-B"));
pMB->ssi263.LoadSnapshot(yamlLoadHelper, nDeviceNum, PH_Phasor, version); // Pre: SetVotraxPhoneme()
pMB->nAYCurrentRegister = yamlLoadHelper.LoadUint(SS_YAML_KEY_AY_CURR_REG);
yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER1_IRQ); // Consume
yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER2_IRQ); // Consume
yamlLoadHelper.LoadBool(SS_YAML_KEY_SPEECH_IRQ); // Consume
if (version >= 2)
{
pMB->bTimer1Active = yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER1_ACTIVE);
pMB->bTimer2Active = yamlLoadHelper.LoadBool(SS_YAML_KEY_TIMER2_ACTIVE);
}
pMB->state = AY_INACTIVE;
pMB->stateB = AY_INACTIVE;
if (version >= 3)
pMB->state = (MockingboardUnitState_e) (yamlLoadHelper.LoadUint(SS_YAML_KEY_MB_UNIT_STATE) & 7);
if (version >= 5)
pMB->stateB = (MockingboardUnitState_e) (yamlLoadHelper.LoadUint(SS_YAML_KEY_MB_UNIT_STATE_B) & 7);
yamlLoadHelper.PopMap();
//
if (version == 1)
{
StartTimer1_LoadStateV1(pMB); // Attempt to start timer
}
else // version >= 2
{
if (pMB->bTimer1Active)
StartTimer1(pMB); // Attempt to start timer
}
if (pMB->bTimer1Active)
{
const UINT id = (nDeviceNum/2)*kNumTimersPer6522+0; // TIMER1
SyncEvent* pSyncEvent = g_syncEvent[id];
pSyncEvent->SetCycles(pMB->sy6522.TIMER1_COUNTER.w + kExtraTimerCycles); // NB. use COUNTER, not LATCH
g_SynchronousEventMgr.Insert(pSyncEvent);
}
if (pMB->bTimer2Active)
{
const UINT id = (nDeviceNum/2)*kNumTimersPer6522+1; // TIMER2
SyncEvent* pSyncEvent = g_syncEvent[id];
pSyncEvent->SetCycles(pMB->sy6522.TIMER2_COUNTER.w + kExtraTimerCycles); // NB. use COUNTER, not LATCH
g_SynchronousEventMgr.Insert(pSyncEvent);
}
nDeviceNum += 2;
pMB++;
}
AY8910_InitClock((int)(Get6502BaseClock() * g_PhasorClockScaleFactor));
// NB. g_SoundcardType & g_bPhasorEnable setup in MB_InitializeIO() -> MB_SetSoundcardType()
return true;
}
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