diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs | 10 | ||||
| -rw-r--r-- | src/Noddybox.Emulation.EightBit/ICpu.cs | 18 | ||||
| -rw-r--r-- | src/Noddybox.Emulation/EmulationStateException.cs | 1 | ||||
| -rw-r--r-- | src/Noddybox.Emulation/EmulationStateLoadManager.cs | 25 | ||||
| -rw-r--r-- | src/Noddybox.Emulation/EmulationStateSaveManager.cs | 1 |
5 files changed, 54 insertions, 1 deletions
diff --git a/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs b/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs index a802142..854cc9d 100644 --- a/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs +++ b/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs @@ -256,6 +256,16 @@ namespace Noddybox.Emulation.EightBit.Z80 }
}
+ public void Run(CpuCallback callback)
+ {
+ VBL = false;
+
+ do
+ {
+ Step();
+ } while (callback(this));
+ }
+
public void MaskableInterrupt(byte value)
{
raise = true;
diff --git a/src/Noddybox.Emulation.EightBit/ICpu.cs b/src/Noddybox.Emulation.EightBit/ICpu.cs index 9d1909c..1ee7781 100644 --- a/src/Noddybox.Emulation.EightBit/ICpu.cs +++ b/src/Noddybox.Emulation.EightBit/ICpu.cs @@ -20,6 +20,15 @@ using System; namespace Noddybox.Emulation.EightBit
{
/// <summary>
+ /// Defines a delegate that will be called after an instruction.
+ /// </summary>
+ /// <param name="sender">The CPU being used. All state will be upto date prior to invoking
+ /// the callback.</param>
+ /// <returns>True if the CPU should continue executing, or false if not. Users should simply
+ /// return Clock.VBL if they need no other than clock control.</returns>
+ public delegate bool CpuCallback(object sender);
+
+ /// <summary>
/// Defines an 8-bit CPU.
/// </summary>
public interface ICpu
@@ -48,6 +57,15 @@ namespace Noddybox.Emulation.EightBit void Run();
/// <summary>
+ /// Runs the CPU until the callback tells it to stop.
+ /// </summary>
+ /// <param name="callback">A delegate that is called after every completed instruction
+ /// cycle and tells the CPU when to stop running. Note that at least one instruction
+ /// is always executed as the callback is made after the cycle has completed.
+ /// </param>
+ void Run(CpuCallback callback);
+
+ /// <summary>
/// Generates a maskable interrupt to the CPU.
/// </summary>
/// <param name="value">Optional value from an interrupting device. May be ignored depending on the CPU type.</param>
diff --git a/src/Noddybox.Emulation/EmulationStateException.cs b/src/Noddybox.Emulation/EmulationStateException.cs index c15bc57..84df165 100644 --- a/src/Noddybox.Emulation/EmulationStateException.cs +++ b/src/Noddybox.Emulation/EmulationStateException.cs @@ -30,6 +30,7 @@ namespace Noddybox.Emulation /// </summary>
public enum Reason
{
+ InvalidStream,
InvalidVersion,
StreamException,
InvalidFieldType
diff --git a/src/Noddybox.Emulation/EmulationStateLoadManager.cs b/src/Noddybox.Emulation/EmulationStateLoadManager.cs index bf131d9..cf9aa52 100644 --- a/src/Noddybox.Emulation/EmulationStateLoadManager.cs +++ b/src/Noddybox.Emulation/EmulationStateLoadManager.cs @@ -39,18 +39,41 @@ namespace Noddybox.Emulation try
{
+ IEmulationState last = null;
+
foreach (IEmulationState obj in objects)
{
+ uint magic = stream.ReadUInt32();
+
+ if (magic != EmulationStateSettings.MAGIC)
+ {
+ string message;
+
+ if (last != null)
+ {
+ message = String.Format("Corrupted stream; {0} may have read too much or little", last.GetType());
+ }
+ else
+ {
+ message = "Invalid stream - not an emulation state file.";
+ }
+
+ throw new EmulationStateException(message,
+ EmulationStateException.Reason.InvalidStream);
+ }
+
int version = stream.ReadInt32();
if (version != obj.Version)
{
throw new EmulationStateException(String.Format("Object {0} expected version {1}; got {2}",
- obj.GetType(), version, obj.Version),
+ obj.GetType(), obj.Version, version),
EmulationStateException.Reason.InvalidVersion);
}
obj.LoadState(manager);
+
+ last = obj;
}
}
catch (IOException ex)
diff --git a/src/Noddybox.Emulation/EmulationStateSaveManager.cs b/src/Noddybox.Emulation/EmulationStateSaveManager.cs index 1d5cea8..94716db 100644 --- a/src/Noddybox.Emulation/EmulationStateSaveManager.cs +++ b/src/Noddybox.Emulation/EmulationStateSaveManager.cs @@ -40,6 +40,7 @@ namespace Noddybox.Emulation {
foreach (IEmulationState obj in objects)
{
+ stream.Write(EmulationStateSettings.MAGIC);
stream.Write(obj.Version);
obj.SaveState(manager);
}
|