Added some more base classes and started on the Z80 implementation.

3 files changed, 279 insertions, 0 deletions

diff --git a/Noddybox.Emulation.EightBit.Z80/Noddybox.Emulation.EightBit.Z80.csproj b/Noddybox.Emulation.EightBit.Z80/Noddybox.Emulation.EightBit.Z80.csproj
new file mode 100644
index 0000000..60cb7ff
--- /dev/null
+++ b/Noddybox.Emulation.EightBit.Z80/Noddybox.Emulation.EightBit.Z80.csproj
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="utf-8"?>

+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

+  <PropertyGroup>

+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>

+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>

+    <ProductVersion>10.0.20506</ProductVersion>

+    <SchemaVersion>2.0</SchemaVersion>

+    <ProjectGuid>{7F257886-40D3-4E2A-BA9C-C5FEE93C08E9}</ProjectGuid>

+    <ProjectTypeGuids>{C089C8C0-30E0-4E22-80C0-CE093F111A43};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>

+    <OutputType>Library</OutputType>

+    <AppDesignerFolder>Properties</AppDesignerFolder>

+    <RootNamespace>Noddybox.Emulation.EightBit.Z80</RootNamespace>

+    <AssemblyName>Noddybox.Emulation.EightBit.Z80</AssemblyName>

+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>

+    <SilverlightVersion>$(TargetFrameworkVersion)</SilverlightVersion>

+    <TargetFrameworkProfile>WindowsPhone71</TargetFrameworkProfile>

+    <TargetFrameworkIdentifier>Silverlight</TargetFrameworkIdentifier>

+    <SilverlightApplication>false</SilverlightApplication>

+    <ValidateXaml>true</ValidateXaml>

+    <ThrowErrorsInValidation>true</ThrowErrorsInValidation>

+  </PropertyGroup>

+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">

+    <DebugSymbols>true</DebugSymbols>

+    <DebugType>full</DebugType>

+    <Optimize>false</Optimize>

+    <OutputPath>Bin\Debug</OutputPath>

+    <DefineConstants>DEBUG;TRACE;SILVERLIGHT;WINDOWS_PHONE</DefineConstants>

+    <NoStdLib>true</NoStdLib>

+    <NoConfig>true</NoConfig>

+    <ErrorReport>prompt</ErrorReport>

+    <WarningLevel>4</WarningLevel>

+  </PropertyGroup>

+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">

+    <DebugType>pdbonly</DebugType>

+    <Optimize>true</Optimize>

+    <OutputPath>Bin\Release</OutputPath>

+    <DefineConstants>TRACE;SILVERLIGHT;WINDOWS_PHONE</DefineConstants>

+    <NoStdLib>true</NoStdLib>

+    <NoConfig>true</NoConfig>

+    <ErrorReport>prompt</ErrorReport>

+    <WarningLevel>4</WarningLevel>

+  </PropertyGroup>

+  <ItemGroup>

+    <Reference Include="System.Windows" />

+    <Reference Include="system" />

+    <Reference Include="System.Core" />

+    <Reference Include="System.Xml" />

+    <Reference Include="System.Net" />

+    <Reference Include="mscorlib.extensions" />

+  </ItemGroup>

+  <ItemGroup>

+    <Compile Include="Z80Cpu.cs" />

+    <Compile Include="Properties\AssemblyInfo.cs" />

+  </ItemGroup>

+  <ItemGroup>

+    <ProjectReference Include="..\Noddybox.Emulation.EightBit\Noddybox.Emulation.EightBit.csproj">

+      <Project>{ADC7A871-4DED-4A92-A447-2D784AB60FAF}</Project>

+      <Name>Noddybox.Emulation.EightBit</Name>

+    </ProjectReference>

+    <ProjectReference Include="..\Noddybox.Emulation\Noddybox.Emulation.csproj">

+      <Project>{A2478066-4DFD-4042-BF98-963922DC97F8}</Project>

+      <Name>Noddybox.Emulation</Name>

+    </ProjectReference>

+  </ItemGroup>

+  <Import Project="$(MSBuildExtensionsPath)\Microsoft\Silverlight for Phone\$(TargetFrameworkVersion)\Microsoft.Silverlight.$(TargetFrameworkProfile).Overrides.targets" />

+  <Import Project="$(MSBuildExtensionsPath)\Microsoft\Silverlight for Phone\$(TargetFrameworkVersion)\Microsoft.Silverlight.CSharp.targets" />

+  <ProjectExtensions />

+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 

+       Other similar extension points exist, see Microsoft.Common.targets.

+  <Target Name="BeforeBuild">

+  </Target>

+  <Target Name="AfterBuild">

+  </Target>

+  -->

+</Project>
\ No newline at end of file
diff --git a/Noddybox.Emulation.EightBit.Z80/Properties/AssemblyInfo.cs b/Noddybox.Emulation.EightBit.Z80/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..52b6054
--- /dev/null
+++ b/Noddybox.Emulation.EightBit.Z80/Properties/AssemblyInfo.cs
@@ -0,0 +1,37 @@
+using System.Reflection;

+using System.Runtime.CompilerServices;

+using System.Runtime.InteropServices;

+using System.Resources;

+

+// General Information about an assembly is controlled through the following 

+// set of attributes. Change these attribute values to modify the information

+// associated with an assembly.

+[assembly: AssemblyTitle("Noddybox.Emulation.EightBit.Z80")]

+[assembly: AssemblyDescription("")]

+[assembly: AssemblyConfiguration("")]

+[assembly: AssemblyCompany("")]

+[assembly: AssemblyProduct("Noddybox.Emulation.EightBit.Z80")]

+[assembly: AssemblyCopyright("Copyright ©  2011")]

+[assembly: AssemblyTrademark("")]

+[assembly: AssemblyCulture("")]

+

+// Setting ComVisible to false makes the types in this assembly not visible 

+// to COM components.  If you need to access a type in this assembly from 

+// COM, set the ComVisible attribute to true on that type.

+[assembly: ComVisible(false)]

+

+// The following GUID is for the ID of the typelib if this project is exposed to COM

+[assembly: Guid("3b53cbb7-adc4-4405-ba85-4b345a46ed11")]

+

+// Version information for an assembly consists of the following four values:

+//

+//      Major Version

+//      Minor Version 

+//      Build Number

+//      Revision

+//

+// You can specify all the values or you can default the Revision and Build Numbers 

+// by using the '*' as shown below:

+[assembly: AssemblyVersion("1.0.0.0")]

+[assembly: AssemblyFileVersion("1.0.0.0")]

+[assembly: NeutralResourcesLanguageAttribute("en-US")]

diff --git a/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs b/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
new file mode 100644
index 0000000..d967bb9
--- /dev/null
+++ b/Noddybox.Emulation.EightBit.Z80/Z80Cpu.cs
@@ -0,0 +1,167 @@
+using System;

+using System.Net;

+using System.Windows;

+using System.Windows.Controls;

+using System.Windows.Documents;

+using System.Windows.Ink;

+using System.Windows.Input;

+using System.Windows.Media;

+using System.Windows.Media.Animation;

+using System.Windows.Shapes;

+

+namespace Noddybox.Emulation.EightBit.Z80

+{

+    /// <summary>

+    /// Provides an implementation of a Zilog Z80 processor.

+    /// </summary>

+    public partial class Z80Cpu : ICpu

+    {

+        #region Private types

+

+        [Flags]

+        private enum Z80Flags

+        {

+            None        = 0x00,

+            Carry       = 0x01,
+            Neg		    = 0x02,
+            PV		    = 0x04,
+            Hidden3	    = 0x08,
+            HalfCarry   = 0x10,
+            Hidden5     = 0x20,
+            Zero		= 0x40,
+            Sign		= 0x80            

+        };

+

+        #endregion

+

+        #region Private data

+

+        // Lookup tables

+        //

+        private Z80Flags[] PSZtable = new Z80Flags[512];
+        private Z80Flags[] SZtable = new Z80Flags[512];
+        private Z80Flags[] Ptable = new Z80Flags[512];
+        private Z80Flags[] Stable = new Z80Flags[512];
+        private Z80Flags[] Ztable = new Z80Flags[512];

+

+        // Machine accessors

+        //

+        private IMemory memory;

+        private IDevice device;

+        private Clock   clock;

+

+        // Main registers

+        //

+        private byte        A;

+        private byte        F;

+        private byte        R;

+        private byte        IFF1;

+        private byte        IFF2;

+        private IRegister16 BC = Register16Factory.Create();

+        private IRegister16 DE = Register16Factory.Create();

+        private IRegister16 HL = Register16Factory.Create();

+        private IRegister16 IX = Register16Factory.Create();

+        private IRegister16 IY = Register16Factory.Create();

+        private IRegister16 SP = Register16Factory.Create();

+        private IRegister16 PC = Register16Factory.Create();

+

+        // Alternate registers

+        //

+        private IRegister16 AF_ = Register16Factory.Create();

+        private IRegister16 BC_ = Register16Factory.Create();

+        private IRegister16 DE_ = Register16Factory.Create();

+        private IRegister16 HL_ = Register16Factory.Create();

+

+        #endregion

+

+        #region ICpu Members

+

+        public void Initialise(IMemory memory, IDevice device, Clock clock)

+        {

+            this.memory = memory;

+            this.device = device;

+            this.clock = clock;

+

+            Reset();

+        }

+

+        public void Reset()

+        {

+            // TODO: Initial register settings.

+        }

+

+        public void Step()

+        {

+            // TODO: Single step.

+        }

+

+        public void Run()

+        {

+            // TODO: Run for a frame

+        }

+

+        public void MaskableInterrupt(byte value)

+        {

+            // TODO: INT

+        }

+

+        public void NonMaskableInterrupt(byte value)

+        {

+            // TODO: NMI

+        }

+

+        #endregion

+

+        #region Constructors

+

+        public Z80Cpu()

+        {

+            // Setup lookup tables

+            //

+            for(int f = 0; f < 256; f++)
+            {
+                Z80Flags p = Z80Flags.None;
+                Z80Flags z = Z80Flags.None;
+                Z80Flags s = Z80Flags.None;
+                int parity = 0;
+
+                for(int b=0; b < 8; b++)
+                {
+                    if ((f & (1<<b)) == (1<<b))
+                    {
+                        parity++;
+                    }
+                }
+
+                if ((parity & 1) == 1)
+                {
+                    p = Z80Flags.PV;
+                }
+
+                if (f == 0)
+                {
+                    z = Z80Flags.Zero;
+                }
+
+                if ((f & 0x80) == 0x80)
+                {
+                    s = Z80Flags.Sign;
+                }
+
+                Ptable[f] = p;
+                Stable[f] = s;
+                Ztable[f] = z;
+                SZtable[f] =z|s;
+                PSZtable[f] = z|s|p;
+
+                Ptable[f+256] = Ptable[f]|Z80Flags.Carry;
+                Stable[f+256] = Stable[f]|Z80Flags.Carry;
+                Ztable[f+256] = Ztable[f]|Z80Flags.Carry;
+                SZtable[f+256] = SZtable[f]|Z80Flags.Carry;
+                PSZtable[f+256] = PSZtable[f]|Z80Flags.Carry;
+            }
+        }

+

+        #endregion

+    }

+}