public VirtualMachine(ushort[] givenInput, ushort[] expectedOutput)
{
Data = new Data(0);
Processor = new Processor(Data, new TestingIODevice(givenInput, expectedOutput));
Disassembler = new Disassembler(Data);
}
/// <summary>
/// Constructs the object using the I/O Device and
/// Data object with specified History size.
/// </summary>
/// <param name="historySize">History size for Data object.</param>
public VirtualMachine(int historySize)
{
Data = new Data(historySize);
Processor = new Processor(Data, new ConsoleIODevice());
Disassembler = new Disassembler(Data);
}
/// <summary>
/// Constructs the object using the specifyed custom Data storage and I/O device
/// objects.
/// </summary>
/// <param name="data">The Data object that stores memory and registers</param>
/// <param name="ioDevice">The I/O device to be used by the I/O instructions</param>
public VirtualMachine(Data data, IIODevice ioDevice)
{
Data = data;
Processor = new Processor(Data, ioDevice);
Disassembler = new Disassembler(Data);
}
/// <summary>
/// Constructs the object using the specifyed custom Data storage and I/O device
/// objects.
/// </summary>
/// <param name="data">The Data object that stores memory and registers</param>
/// <param name="ioDevice">The I/O device to be used by the I/O instructions</param>
public VirtualMachine(Data data, IIODevice ioDevice)
{
Data = data;
Processor = new Processor(Data, ioDevice);
Disassembler = new Disassembler(Data);
}
/// <summary>
/// Constructs the object using the I/O Device and
/// Data object with specified History size.
/// </summary>
/// <param name="historySize">History size for Data object.</param>
public VirtualMachine(int historySize)
{
Data = new Data(historySize);
Processor = new Processor(Data, new ConsoleIODevice());
Disassembler = new Disassembler(Data);
}
/// <summary>
/// Calculates the effects of the next instruction.
/// </summary>
/// <remarks>
/// This calculation in advance allows breakpoints to be hit BEFORE the
/// actual execution.
/// </remarks>
/// <returns>A value holding the effects of the instruction.</returns>
protected DataDelta CalculateNextDelta()
{
Data data = Target.VirtualMachine.Data;
if (_processor == null || _processor.Data != data)
{
_processor = new Processor(data, _nullDevice);
}
data.Commit(); // Commits any previous changes
try { _processor.Step(); } // Execute next instruction (breakpoint probe).
catch (Exception) { }
DataDelta result = data.Delta; // Delta object holds the changes made by the probe
if (!data.Uncommit()) // Uncommit restores previous Delta object from history and discards the probe changes.
{
// If uncommit fails, we need to manually discard probe changes by calling Rollback().
data.Rollback();
}
return result;
}
