protected void EmitDebugTargetReached()
{
DebugStepMode = DebugStepMode.None;
if (DebugTargetReached != null)
{
DebugTargetReached(this, EventArgs.Empty);
}
}
/// <summary>
/// Initializes the options
/// </summary>
/// <param name="emulationMode">Execution emulation mode</param>
/// <param name="debugStepMode">Debugging execution mode</param>
/// <param name="fastTapeMode">Fast tape mode</param>
/// <param name="terminationPoint">Termination point to reach</param>
public ExecuteCycleOptions(EmulationMode emulationMode = EmulationMode.Continuous,
DebugStepMode debugStepMode = DebugStepMode.StopAtBreakpoint,
bool fastTapeMode = false,
ushort terminationPoint = 0x0000)
{
EmulationMode = emulationMode;
DebugStepMode = debugStepMode;
FastTapeMode = fastTapeMode;
TerminationPoint = terminationPoint;
}
/// <summary>
/// Initializes the options
/// </summary>
/// <param name="emulationMode">Execution emulation mode</param>
/// <param name="debugStepMode">Debugging execution mode</param>
/// <param name="fastTapeMode">Fast tape mode</param>
/// <param name="terminationRom">ROM index of the termination point</param>
/// <param name="terminationPoint">Termination point to reach</param>
/// <param name="skipInterruptRoutine">
/// Signs if maskable interrupt routine instructions should be skipped
/// </param>
public ExecuteCycleOptions(EmulationMode emulationMode = EmulationMode.Continuous,
DebugStepMode debugStepMode = DebugStepMode.StopAtBreakpoint,
bool fastTapeMode = false,
int terminationRom = 0x0000,
ushort terminationPoint = 0x0000,
bool skipInterruptRoutine = false)
{
EmulationMode = emulationMode;
DebugStepMode = debugStepMode;
FastTapeMode = fastTapeMode;
TerminationRom = terminationRom;
TerminationPoint = terminationPoint;
SkipInterruptRoutine = skipInterruptRoutine;
}
/// <summary>
/// Initializes the options.
/// </summary>
/// <param name="emulationMode">Execution emulation mode.</param>
/// <param name="debugStepMode">Debugging execution mode.</param>
/// <param name="fastTapeMode">Fast tape mode.</param>
/// <param name="terminationRom">ROM index of the termination point.</param>
/// <param name="terminationPoint">Termination point to reach.</param>
public ExecuteCycleOptions(EmulationMode emulationMode = EmulationMode.Continuous,
DebugStepMode debugStepMode = DebugStepMode.StopAtBreakpoint,
bool fastTapeMode = false,
int terminationRom = 0x0000,
ushort terminationPoint = 0x0000,
bool fastVmMode = false,
long timeoutTacts = 0,
bool disableScreenRendering = false)
{
EmulationMode = emulationMode;
DebugStepMode = debugStepMode;
FastTapeMode = fastTapeMode;
TerminationRom = terminationRom;
TerminationPoint = terminationPoint;
FastVmMode = fastVmMode;
TimeoutTacts = timeoutTacts;
DisableScreenRendering = disableScreenRendering;
}
protected void EmitDebugTargetReached()
{
DebugStepMode = DebugStepMode.None;
if (DebugTargetReached != null)
DebugTargetReached(this, EventArgs.Empty);
}
/// <summary>
/// Checks whether the execution cycle should be stopped for debugging
/// </summary>
/// <param name="stepMode">Debug setp mode</param>
/// <param name="executedInstructionCount">
/// The count of instructions already executed in this cycle
/// </param>
/// <returns>True, if the execution should be stopped</returns>
private bool IsDebugStop(DebugStepMode stepMode, int executedInstructionCount)
{
// --- No debug provider, no stop
if (DebugInfoProvider == null)
{
return(false);
}
// --- In Step-Into mode we always stop when we're about to
// --- execute the next instruction
if (stepMode == DebugStepMode.StepInto)
{
return(executedInstructionCount > 0);
}
// --- In Stop-At-Breakpoint mode we stop only if a predefined
// --- breakpoint is reached
if (stepMode == DebugStepMode.StopAtBreakpoint &&
DebugInfoProvider.Breakpoints.ContainsKey(Cpu.Registers.PC))
{
// --- We do not stop unless we executed at least one instruction
return(executedInstructionCount > 0);
}
// --- We're in Step-Over mode
if (stepMode == DebugStepMode.StepOver)
{
if (DebugInfoProvider.ImminentBreakpoint != null)
{
// --- We also stop, if an imminent breakpoint is reached, and also remove
// --- this breakpoint
if (DebugInfoProvider.ImminentBreakpoint == Cpu.Registers.PC)
{
DebugInfoProvider.ImminentBreakpoint = null;
return(true);
}
}
else
{
var imminentJustCreated = false;
// --- We check for a CALL-like instruction
var length = Cpu.GetCallInstructionLength();
if (length > 0)
{
// --- Its a CALL-like instraction, create an imminent breakpoint
DebugInfoProvider.ImminentBreakpoint = (ushort)(Cpu.Registers.PC + length);
imminentJustCreated = true;
}
// --- We stop, we executed at least one instruction and if there's no imminent
// --- breakpoint or we've just created one
if (executedInstructionCount > 0 &&
(DebugInfoProvider.ImminentBreakpoint == null || imminentJustCreated))
{
return(true);
}
}
}
// --- In any other case, we carry on
return(false);
}