Method IORead

source/Disk.cpp:2155–2200

}

BYTE __stdcall Disk2InterfaceCard::IORead(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nExecutedCycles)
{
	CpuCalcCycles(nExecutedCycles);	// g_nCumulativeCycles needed by most Disk I/O functions

	UINT uSlot = ((addr & 0xff) >> 4) - 8;
	Disk2InterfaceCard* pCard = (Disk2InterfaceCard*) MemGetSlotParameters(uSlot);

	ImageInfo* pImage = pCard->m_floppyDrive[pCard->m_currDrive].m_disk.m_imagehandle;
	bool isWOZ = ImageIsWOZ(pImage);

	if (isWOZ && pCard->m_seqFunc.function == dataShiftWrite)	// Occurs at end of sector write ($C0EE)
		pCard->DataShiftWriteWOZ(pc, addr, nExecutedCycles);	// Finish any previous write

	pCard->SetSequencerFunction(addr, nExecutedCycles);

	switch (addr & 0xF)
	{
	case 0x0:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x1:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x2:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x3:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x4:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x5:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x6:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x7:	pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x8:	pCard->ControlMotor(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0x9:	pCard->ControlMotor(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0xA:	isWOZ = pCard->Enable(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0xB:	isWOZ = pCard->Enable(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0xC:	if (!isWOZ) pCard->ReadWrite(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0xD:	pCard->LoadWriteProtect(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0xE:	pCard->SetReadMode(pc, addr, bWrite, d, nExecutedCycles); break;
	case 0xF:	pCard->SetWriteMode(pc, addr, bWrite, d, nExecutedCycles); break;
	}

	// only even addresses return the latch (UTAIIe Table 9.1)
	if (!(addr & 1))
	{
		if (isWOZ && pCard->m_seqFunc.function != dataShiftWrite)
			pCard->DataLatchReadWriteWOZ(pc, addr, bWrite, nExecutedCycles);

		return pCard->m_floppyLatch;
	}

	return MemReadFloatingBus(nExecutedCycles);
}

BYTE __stdcall Disk2InterfaceCard::IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nExecutedCycles)
{