Method DumpTrackWOZ

source/Disk.cpp:1684–1792

Dump nibbles from current position bitstream wraps to same position NB. Need to define LOG_DISK_NIBBLES_READ so that GetReadD5AAxxDetectedString() works.

// Dump nibbles from current position bitstream wraps to same position
// NB. Need to define LOG_DISK_NIBBLES_READ so that GetReadD5AAxxDetectedString() works.
void Disk2InterfaceCard::DumpTrackWOZ(FloppyDisk floppy)	// pass a copy of m_floppy
{
	FormatTrack formatTrack(true);

	BYTE shiftReg = 0;
	UINT zeroCount = 0;
	UINT nibbleCount = 0;

	const UINT startBitOffset = 0;	// NB. may need to tweak this offset, since the bitstream is a circular buffer
	floppy.m_bitOffset = startBitOffset;
	UpdateBitStreamOffsets(floppy);

	int nibbleStartBitOffset = -1;

	bool newLine = true;
	bool doneLastBit = false;

	while (1)
	{
		if (newLine && nibbleStartBitOffset >= 0)
		{
			newLine = false;
			LogOutput("%04X:", nibbleStartBitOffset);
			nibbleStartBitOffset = -1;
		}

		BYTE n = floppy.m_trackimage[floppy.m_byte];
		BYTE outputBit = (n & floppy.m_bitMask) ? 1 : 0;

		IncBitStream(floppy);

		if (startBitOffset == floppy.m_bitOffset)	// done complete track?
			doneLastBit = true;
		else if (doneLastBit)
			break;

		if (shiftReg & 0x80)
		{
			if (outputBit == 0)		// zero, so LSS holds nibble in latch
			{
				zeroCount++;
				continue;
			}

			// else: start of next nibble

			nibbleCount++;

			char syncBits = zeroCount <= 9 ? '0' + zeroCount : '+';
			if (zeroCount == 0)	LogOutput("%02X   ", shiftReg);
			else				LogOutput("%02X(%c)", shiftReg, syncBits);

			formatTrack.DecodeLatchNibbleRead(shiftReg);

			if ((nibbleCount % 32) == 0)
			{
				std::string strReadDetected = formatTrack.GetReadD5AAxxDetectedString();
				if (!strReadDetected.empty())