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//
// /home/ms/source/sidplay/libsidplay/RCS/player.cpp,v
//
#include "player.h"
#include "myendian.h"
#include "6510_.h"
extern ubyte playRamRom; // MPU bank-switch setting for player call
// These texts are used to override the sidtune settings.
static const char text_PAL_VBI[] = "50 Hz VBI (PAL)";
static const char text_PAL_CIA[] = "CIA 1 Timer A (PAL)";
static const char text_NTSC_VBI[] = "60 Hz VBI (NTSC)";
static const char text_NTSC_CIA[] = "CIA 1 Timer A (NTSC)";
static const int FREQ_VBI_PAL = 50; // Hz
static const int FREQ_VBI_NTSC = 60; //
// Table used to check sidtune for usage of PlaySID digis.
static const uword c64addrTable[] =
{
// PlaySID extended SID registers (0xd49d left out).
//0xd41d, 0xd41e, 0xd41f, // SID is too often written to as 32 bytes!
0xd43d, 0xd43e, 0xd43f,
0xd45d, 0xd45e, 0xd45f, 0xd47d, 0xd47e, 0xd47f,
//0xd51d, 0xd51e, 0xd51f, // SID is too often written to as 32 bytes!
0xd53d, 0xd53e, 0xd53f,
0xd55d, 0xd55e, 0xd55f, 0xd57d, 0xd57e, 0xd57f
};
// Number of addresses in c64addrTable[].
static const int numberOfC64addr = sizeof(c64addrTable) / sizeof(uword);
static ubyte oldValues[numberOfC64addr];
bool sidEmuInitializeSong(emuEngine & thisEmuEngine,
sidTune & thisTune,
uword songNumber)
{
// Do a regular song initialization.
bool ret = sidEmuInitializeSongOld(thisEmuEngine,thisTune,songNumber);
if (ret && (thisEmuEngine.config.digiPlayerScans!=0))
{
uword replayPC = thisTune.info.playAddr;
// playRamRom was set by sidEmuInitializeSongOld(..).
if ( replayPC == 0 )
{
playRamRom = c64mem1[1];
if ((playRamRom & 2) != 0) // isKernal?
{
replayPC = readLEword(c64mem1+0x0314); // IRQ
}
else
{
replayPC = readLEword(c64mem1+0xfffe); // NMI
}
}
// Save the SID registers to allow later comparison.
for (int i = 0; i < numberOfC64addr; i++)
{
oldValues[i] = c64mem2[c64addrTable[i]];
}
// Run the music player for a couple of player calls and check for
// changes in the PlaySID extended SID registers. If no digis are
// used, apply a higher amplification on each SID voice. First
// check also covers writings of the player INIT routine.
bool useDigis = false;
int loops = thisEmuEngine.config.digiPlayerScans;
while (loops)
{
for (int i = 0; i < numberOfC64addr; i++)
{
if (oldValues[i] != c64mem2[c64addrTable[i]])
{
useDigis = true;
break;
}
oldValues[i] = c64mem2[c64addrTable[i]];
}
interpreter(replayPC,playRamRom,0,0,0);
loops--;
if (useDigis)
{
break;
}
};
thisEmuEngine.amplifyThreeVoiceTunes(!useDigis);
// Here re-init song to start at beginning.
ret = sidEmuInitializeSongOld(thisEmuEngine,thisTune,songNumber);
}
return ret;
}
bool sidEmuInitializeSongOld(emuEngine & thisEmuEngine,
sidTune & thisTune,
uword songNumber)
{
if (!thisEmuEngine.isReady || !thisTune.status )
{
return false;
}
else
{
// ------------------------------------------- Determine clock/speed.
// Get speed/clock setting for song and preselect
// speed/clock descriptions strings, reg = song init akkumulator.
ubyte reg = thisTune.selectSong(songNumber) -1;
const char* the_description;
ubyte the_clock = thisTune.info.clockSpeed;
ubyte the_speed = thisTune.info.songSpeed;
if (thisEmuEngine.config.forceSongSpeed)
{
the_clock = thisEmuEngine.config.clockSpeed;
}
// Select speed description string.
if (thisEmuEngine.config.clockSpeed == SIDTUNE_CLOCK_PAL)
{
if (thisTune.info.songSpeed == SIDTUNE_SPEED_VBI)
{
the_description = text_PAL_VBI;
}
else //if (thisTune.info.songSpeed == SIDTUNE_SPEED_CIA_1A)
{
the_description = text_PAL_CIA;
}
}
else //if (thisEmuEngine.config.clockSpeed == SIDTUNE_CLOCK_NTSC)
{
if (thisTune.info.songSpeed == SIDTUNE_SPEED_VBI)
{
the_description = text_NTSC_VBI;
}
else //if (thisTune.info.songSpeed == SIDTUNE_SPEED_CIA_1A)
{
the_description = text_NTSC_CIA;
}
}
// Substitute correct VBI frequency.
if ((the_clock==SIDTUNE_CLOCK_PAL) &&
(the_speed==SIDTUNE_SPEED_VBI))
{
the_speed = FREQ_VBI_PAL;
}
if ((the_clock==SIDTUNE_CLOCK_NTSC) &&
(the_speed==SIDTUNE_SPEED_VBI))
{
the_speed = FREQ_VBI_NTSC;
}
// Transfer the speed settings to the emulator engine.
// From here on we don't touch the SID clock speed setting.
extern void sidEmuSetReplayingSpeed(int clockMode, uword callsPerSec); // --> 6581_.cpp
sidEmuSetReplayingSpeed(the_clock,the_speed);
thisTune.info.speedString = the_description;
// ------------------------------------------------------------------
thisEmuEngine.MPUreset();
if ( !thisTune.placeSidTuneInC64mem(thisEmuEngine.MPUreturnRAMbase()) )
{
return false;
}
if (thisTune.info.musPlayer)
{
thisTune.MUS_installPlayer(thisEmuEngine.MPUreturnRAMbase());
}
thisEmuEngine.amplifyThreeVoiceTunes(false); // assume digis are used
if ( !thisEmuEngine.reset() ) // currently always returns true
{
return false;
}
// In PlaySID-mode the interpreter will ignore some of the parameters.
//bool retcode =
interpreter(thisTune.info.initAddr,c64memRamRom(thisTune.info.initAddr),reg,reg,reg);
playRamRom = c64memRamRom(thisTune.info.playAddr);
// This code is only used to be able to print out the initial IRQ address.
if (thisTune.info.playAddr == 0)
{
// Get the address of the interrupt handler.
if ((c64mem1[1] & 2) != 0) // isKernal?
{
thisTune.setIRQaddress(readEndian(c64mem1[0x0315],c64mem1[0x0314])); // IRQ
}
else
{
thisTune.setIRQaddress(readEndian(c64mem1[0xffff],c64mem1[0xfffe])); // NMI
}
}
else
{
thisTune.setIRQaddress(0);
}
#if defined(SIDEMU_TIME_COUNT)
thisEmuEngine.resetSecondsThisSong();
#endif
return true;
} // top else (emu&sidtune okay)
}
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