// Called by emulation code when Speaker I/O reg is accessed
BYTE SpkrToggle (WORD, WORD, BYTE, BYTE, ULONG nCyclesLeft)
{
g_bSpkrToggleFlag = true;
if(!g_bFullSpeed)
Spkr_SetActive(true);
needsprecision = cumulativecycles; // ?
// if (extbench)
// {
// DisplayBenchmarkResults();
// extbench = 0;
// }
if (soundtype == SOUND_WAVE)
{
CpuCalcCycles(nCyclesLeft);
UpdateSpkr();
g_nSpeakerData = ~g_nSpeakerData;
}
return MemReadFloatingBus(nCyclesLeft); // reading from $C030..$C03F retrurns unpredictable value?
}
// Called by ControlMotor() & Enable()
void Disk2InterfaceCard::CheckSpinning(const ULONG nExecutedCycles)
{
DWORD modechange = (m_floppyMotorOn && !m_floppyDrive[m_currDrive].m_spinning);
if (m_floppyMotorOn)
m_floppyDrive[m_currDrive].m_spinning = SPINNING_CYCLES;
if (modechange)
FrameDrawDiskLEDS( (HDC)0 );
if (modechange)
{
// Set m_diskLastCycle when motor changes: not spinning (ie. off for 1 sec) -> on
CpuCalcCycles(nExecutedCycles);
m_diskLastCycle = g_nCumulativeCycles;
}
}
void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nExecutedCycles)
{
/* m_floppyLoadMode = 0; */
FloppyDrive* pDrive = &m_floppyDrive[m_currDrive];
FloppyDisk* pFloppy = &pDrive->m_disk;
if (!pFloppy->m_trackimagedata && pFloppy->m_imagehandle)
ReadTrack(m_currDrive);
if (!pFloppy->m_trackimagedata)
{
m_floppyLatch = 0xFF;
return;
}
// Improve precision of "authentic" drive mode - GH#125
UINT uSpinNibbleCount = 0;
CpuCalcCycles(nExecutedCycles); // g_nCumulativeCycles required for uSpinNibbleCount & LogWriteCheckSyncFF()
if (!m_enhanceDisk && pDrive->m_spinning)
{
const ULONG nCycleDiff = (ULONG) (g_nCumulativeCycles - m_diskLastCycle);
m_diskLastCycle = g_nCumulativeCycles;
if (nCycleDiff > 40)
{
// 40 cycles for a write of a 10-bit 0xFF sync byte
uSpinNibbleCount = nCycleDiff >> 5; // ...but divide by 32 (not 40)
ULONG uWrapOffset = uSpinNibbleCount % pFloppy->m_nibbles;
pFloppy->m_byte += uWrapOffset;
if (pFloppy->m_byte >= pFloppy->m_nibbles)
pFloppy->m_byte -= pFloppy->m_nibbles;
#if LOG_DISK_NIBBLES_SPIN
UINT uCompleteRevolutions = uSpinNibbleCount / pFloppy->m_nibbles;
LOG_DISK("spin: revs=%d, nibbles=%d\r\n", uCompleteRevolutions, uWrapOffset);
#endif
}
}
