/// <summary>
/// Checks if the disassembler should enter into Spectrum-specific mode after
/// the specified disassembly item.
/// </summary>
/// <param name="item">Item used to check the Spectrum-specific mode</param>
/// <returns>
/// True, to move to the Spectrum-specific mode; otherwise, false
/// </returns>
private bool ShouldEnterSpectrumSpecificMode(DisassemblyItem item)
{
// --- Check for Spectrum 48K RST #08
if ((DisassemblyFlags & SpectrumSpecificDisassemblyFlags.Spectrum48Rst08) != 0 &&
item?.OpCodes.Trim() == "CF")
{
_spectMode = SpectrumSpecificMode.Spectrum48Rst08;
item.HardComment = "(Report error)";
return(true);
}
// --- Check for Spectrum 48K RST #28
if ((DisassemblyFlags & SpectrumSpecificDisassemblyFlags.Spectrum48Rst28) != 0 &&
(item?.OpCodes.Trim() == "EF" || // --- RST #28
item?.OpCodes.Trim() == "CD 5E 33" || // --- CALL 335E
item?.OpCodes.Trim() == "CD 62 33")) // --- CALL 3362
{
_spectMode = SpectrumSpecificMode.Spectrum48Rst28;
_seriesCount = 0;
item.HardComment = "(Invoke Calculator)";
return(true);
}
return(false);
}
/// <summary>
/// Generates bytecode output for the specified memory section
/// </summary>
/// <param name="section">Section information</param>
private void GenerateRst28ByteCodeOutput(MemorySection section)
{
_spectMode = SpectrumSpecificMode.Spectrum48Rst28;
_seriesCount = 0;
_currentOpCodes = new StringBuilder(16);
var addr = _offset = section.StartAddress;
while (addr <= section.EndAddress)
{
_currentOpCodes.Clear();
var opCode = Fetch();
// ReSharper disable once UnusedVariable
var item = DisassembleCalculatorEntry((ushort)addr, opCode, out var carryOn);
_output.AddItem(item);
addr = _offset;
}
}
/// <summary>
/// Checks if the disassembler should enter into Spectrum-specific mode after
/// the specified disassembly item.
/// </summary>
/// <param name="item">Item used to check the Spectrum-specific mode</param>
/// <returns>
/// True, to move to the Spectrum-specific mode; otherwise, false
/// </returns>
private bool ShouldEnterSpectrumSpecificMode(DisassemblyItem item)
{
// --- Check if we find flags for the bank of the disassembly item
var bank = item.Address >> 14;
if (!DisassemblyFlags.TryGetValue(bank, out var flags) ||
flags == SpectrumSpecificDisassemblyFlags.None)
{
return(false);
}
// --- Check for Spectrum 48K RST #08
if ((flags & SpectrumSpecificDisassemblyFlags.Spectrum48Rst08) != 0 &&
item.OpCodes.Trim() == "CF")
{
_spectMode = SpectrumSpecificMode.Spectrum48Rst08;
item.HardComment = "(Report error)";
return(true);
}
// --- Check for Spectrum 48K RST #28
if ((flags & SpectrumSpecificDisassemblyFlags.Spectrum48Rst28) != 0 &&
(item.OpCodes.Trim() == "EF" || // --- RST #28
item.OpCodes.Trim() == "CD 5E 33" || // --- CALL 335E
item.OpCodes.Trim() == "CD 62 33")) // --- CALL 3362
{
_spectMode = SpectrumSpecificMode.Spectrum48Rst28;
_seriesCount = 0;
item.HardComment = "(Invoke Calculator)";
return(true);
}
// --- Check for Spectrum 128K RST #28
if ((flags & SpectrumSpecificDisassemblyFlags.Spectrum128Rst28) != 0 &&
item.OpCodes.Trim() == "EF")
{
_spectMode = SpectrumSpecificMode.Spectrum128Rst8;
item.HardComment = "(Call Spectrum 48 ROM)";
return(true);
}
return(false);
}
/// <summary>
/// Disassembles the subsequent operation as Spectrum-specific
/// </summary>
/// <param name="carryOn">
/// True, if the disassembler still remains in Spectrum-specific mode;
/// otherwise, false
/// </param>
/// <returns>Disassembled operation</returns>
private DisassemblyItem DisassembleSpectrumSpecificOperation(out bool carryOn)
{
if (_spectMode == SpectrumSpecificMode.None)
{
carryOn = false;
return(null);
}
DisassemblyItem item = null;
carryOn = false;
// --- Handle Spectrum 48 Rst08
if (_spectMode == SpectrumSpecificMode.Spectrum48Rst08)
{
// --- The next byte is the operation code
var address = (ushort)_offset;
var errorCode = Fetch();
_spectMode = SpectrumSpecificMode.None;
item = new DisassemblyItem(address)
{
OpCodes = $"{errorCode:X2}",
Instruction = $".defb #{errorCode:X2}",
HardComment = $"(error code: #{errorCode:X2})",
LastAddress = (ushort)(_offset - 1)
};
}
// --- Handle Spectrum 48 Rst08
if (_spectMode == SpectrumSpecificMode.Spectrum48Rst28)
{
var address = (ushort)_offset;
var calcCode = Fetch();
item = DisassembleCalculatorEntry(address, calcCode, out carryOn);
}
if (!carryOn)
{
_spectMode = SpectrumSpecificMode.None;
}
return(item);
}
/// <summary>
/// Disassembles the subsequent operation as Spectrum-specific
/// </summary>
/// <param name="carryOn">
/// True, if the disassembler still remains in Spectrum-specific mode;
/// otherwise, false
/// </param>
/// <returns>Disassembled operation</returns>
private DisassemblyItem DisassembleSpectrumSpecificOperation(out bool carryOn)
{
if (_spectMode == SpectrumSpecificMode.None)
{
carryOn = false;
return(null);
}
DisassemblyItem item = null;
carryOn = false;
// --- Handle Spectrum 48 RST #08
if (_spectMode == SpectrumSpecificMode.Spectrum48Rst08)
{
// --- The next byte is the operation code
var address = (ushort)_offset;
var errorCode = Fetch();
_spectMode = SpectrumSpecificMode.None;
item = new DisassemblyItem(address)
{
Instruction = $".defb #{errorCode:X2}",
HardComment = $"(error code: #{errorCode:X2})",
LastAddress = (ushort)(_offset - 1)
};
}
// --- Handle Spectrum 48 RST #28
if (_spectMode == SpectrumSpecificMode.Spectrum48Rst28)
{
var address = (ushort)_offset;
var calcCode = Fetch();
item = DisassembleCalculatorEntry(address, calcCode, out carryOn);
}
// --- Handle Spectrum 128 RST #08
if (_spectMode == SpectrumSpecificMode.Spectrum128Rst8)
{
// --- The next byte is the operation code
var address = (ushort)_offset;
var callAddress = FetchWord();
_spectMode = SpectrumSpecificMode.None;
item = new DisassemblyItem(address)
{
Instruction = $".defw #{callAddress:X4}",
LastAddress = (ushort)(_offset - 1)
};
var provider = GetProvider <ISpectrum48RomLabelProvider>();
var label = provider?.GetSpectrum48Label(callAddress);
if (label != null)
{
item.HardComment = $"({label})";
}
}
if (!carryOn)
{
_spectMode = SpectrumSpecificMode.None;
}
return(item);
}