From a00e548533eed5b1aead479e70a117eb05458a5f Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Sun, 8 Jan 2012 22:37:21 +0000
Subject: Added rest of ED opcodes and GPL fixed headers.

---
 src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs | 104 ++++++++++++++++++++++----
 1 file changed, 90 insertions(+), 14 deletions(-)

(limited to 'src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs')

diff --git a/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs b/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
index 78f0bfa..f937ea9 100644
--- a/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
+++ b/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
@@ -11,7 +11,7 @@
 // GNU General Public License for more details.
 //
 // You should have received a copy of the GNU General Public License
-// along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+// along with Noddybox.Emulation.  If not, see <http://www.gnu.org/licenses/>.
 //
 // Copyright (c) 2012 Ian Cowburn
 //
@@ -26,20 +26,11 @@ namespace Noddybox.Emulation.EightBit.Z80
     {
         #region Private types
 
-        [Flags]
-        private enum Z80Flags
+        private enum EventType
         {
-            None        = 0x00,
-            Carry       = 0x01,
-            Neg		    = 0x02,
-            PV		    = 0x04,
-            Hidden3	    = 0x08,
-            HalfCarry   = 0x10,
-            Hidden5     = 0x20,
-            Zero		= 0x40,
-            Sign		= 0x80,
-            Hidden      = Hidden3 | Hidden5
-        };
+            HALT,
+            EDHook
+        }
 
         #endregion
 
@@ -295,5 +286,90 @@ namespace Noddybox.Emulation.EightBit.Z80
         }
 
         #endregion
+
+        #region Events
+
+        /// <summary>
+        /// The CPU has been halted.
+        /// </summary>
+        public event EventHandler<Z80CpuEventArgs> HaltEvent;
+
+        /// <summary>
+        /// A no-operation ED opcode has been executed.  Useful for placing
+        /// hooks into the Z80 code.
+        /// </summary>
+        public event EventHandler<Z80CpuEventArgs> EDNopEvent;
+
+        /// <summary>
+        /// Called to raise <see cref="HaltEvent"/>
+        /// </summary>
+        /// <param name="e">The event arguments.</param>
+        protected void OnHaltEvent(Z80CpuEventArgs e)
+        {
+            EventHandler<Z80CpuEventArgs> handler = HaltEvent;
+
+            if (handler != null)
+            {
+                handler(this, e);
+            }
+        }
+
+        /// <summary>
+        /// Called to raise <see cref="EDNopEvent"/>
+        /// </summary>
+        /// <param name="e">The event arguments.</param>
+        protected void OnEDNopEvent(Z80CpuEventArgs e)
+        {
+            EventHandler<Z80CpuEventArgs> handler = EDNopEvent;
+
+            if (handler != null)
+            {
+                handler(this, e);
+            }
+        }
+
+        private void TriggerEvent(EventType type, byte opcode)
+        {
+            Z80CpuEventArgs e = new Z80CpuEventArgs
+                                 {
+                                    Opcode = opcode,
+                                    A = this.A,
+                                    F = this.F,
+                                    BC = this.BC,
+                                    DE = this.DE,
+                                    HL = this.HL,
+                                    SP = this.SP,
+                                    PC = this.PC,
+                                    AF_ = this.AF_,
+                                    BC_ = this.BC_,
+                                    DE_ = this.DE_,
+                                    HL_ = this.HL_
+                                };
+
+            switch(type)
+            {
+                case EventType.HALT:
+                    OnHaltEvent(e);
+                    break;
+
+                case EventType.EDHook:
+                    OnEDNopEvent(e);
+                    break;
+            }
+
+            A = e.A;
+            F = e.F;
+            BC = e.BC;
+            DE = e.DE;
+            HL = e.HL;
+            SP = e.SP;
+            PC = e.PC;
+            AF_ = e.AF_;
+            BC_ = e.BC_;
+            DE_ = e.DE_;
+            HL_ = e.HL_;
+        }
+
+        #endregion
     }
 }
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