Added instruction counter to Z80

1 files changed, 24 insertions, 0 deletions

diff --git a/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs b/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
index 74a8df1..06433dc 100644
--- a/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
+++ b/src/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
@@ -123,6 +123,10 @@ namespace Noddybox.Emulation.EightBit.Z80
         private bool        HALT;

         private int         shift;

 

+        // Counters

+        //

+        private uint        executedInstructions;

+

         #endregion

 

         #region Private members

@@ -228,6 +232,7 @@ namespace Noddybox.Emulation.EightBit.Z80
             CheckInterrupts();

             AddR(1);

             shift = 0;

+            executedInstructions++;

             DecodeByte(memory.Read(PC++));

         }

 

@@ -330,6 +335,25 @@ namespace Noddybox.Emulation.EightBit.Z80
         #region Public members

 

         /// <summary>

+        /// Get/reset the number of executed instructions.  If the reset is not zero, and expception is thrown.

+        /// </summary>

+        public uint ExecutedInstructions

+        {

+            get {return executedInstructions;}

+            set

+            {

+                if (value == 0)

+                {

+                    executedInstructions = 0;

+                }

+                else

+                {

+                    throw new ArgumentOutOfRangeException("Can only reset opcode count to zero");

+                }

+            }

+        }

+

+        /// <summary>

         /// Set/get the current state of the accumulator.

         /// </summary>

         public byte Acummulator