From db1bfcfdfcfaf562003123be0b4d35d741f5493f Mon Sep 17 00:00:00 2001
From: beirich <beirich@4bbf4f03-6f44-549e-7e59-35d4b0962838>
Date: Tue, 22 May 2012 02:25:41 +0000
Subject: [PATCH] very preliminary genesis savestate support

---
 .../Consoles/Sega/Genesis/GenVDP.cs           | 50 +++++++++++++++++-
 .../Consoles/Sega/Genesis/Genesis.cs          | 52 +++++++++++++++----
 2 files changed, 91 insertions(+), 11 deletions(-)

diff --git a/BizHawk.Emulation/Consoles/Sega/Genesis/GenVDP.cs b/BizHawk.Emulation/Consoles/Sega/Genesis/GenVDP.cs
index 2f58cd5a40..851d5c313c 100644
--- a/BizHawk.Emulation/Consoles/Sega/Genesis/GenVDP.cs
+++ b/BizHawk.Emulation/Consoles/Sega/Genesis/GenVDP.cs
@@ -1,4 +1,6 @@
 using System;
+using System.IO;
+using System.Globalization;
 
 namespace BizHawk.Emulation.Consoles.Sega
 {
@@ -137,7 +139,7 @@ namespace BizHawk.Emulation.Consoles.Sega
                     VdpDataAddr += Registers[0x0F];
                     break;
                 default: 
-                    Console.WriteLine("VDP DATA WRITE WITH UNHANDLED CODE!!!");
+                    //Console.WriteLine("VDP DATA WRITE WITH UNHANDLED CODE!!!");
                     break;
             }
         }
@@ -326,5 +328,51 @@ namespace BizHawk.Emulation.Consoles.Sega
         {
             get { return Palette[Registers[7] & 0x3F]; }
         }
+
+        public void SaveStateText(TextWriter writer)
+        {
+            writer.WriteLine("[VDP]");
+
+            writer.Write("VRAM ");
+            VRAM.SaveAsHex(writer);
+            writer.Write("CRAM ");
+            CRAM.SaveAsHex(writer);
+            writer.Write("VSRAM ");
+            VSRAM.SaveAsHex(writer);
+            writer.Write("Registers ");
+            Registers.SaveAsHex(writer);
+
+            writer.WriteLine("ControlWordPending {0}", ControlWordPending);
+            writer.WriteLine("DmaFillModePending {0}", DmaFillModePending);
+            writer.WriteLine("VdpDataAddr {0:X4}", VdpDataAddr);
+            writer.WriteLine("VdpDataCode {0}", VdpDataCode);
+
+            writer.WriteLine("[/VDP]");
+        }
+
+        public void LoadStateText(TextReader reader)
+        {
+            while (true)
+            {
+                string[] args = reader.ReadLine().Split(' ');
+                if (args[0].Trim() == "") continue;
+                if (args[0] == "[/VDP]") break;
+                else if (args[0] == "VRAM")                 VRAM.ReadFromHex(args[1]);
+                else if (args[0] == "CRAM")                 CRAM.ReadFromHex(args[1]);
+                else if (args[0] == "VSRAM")                VSRAM.ReadFromHex(args[1]);
+                else if (args[0] == "Registers")            Registers.ReadFromHex(args[1]);
+                else if (args[0] == "ControlWordPending")   ControlWordPending = bool.Parse(args[1]);
+                else if (args[0] == "DmaFillModePending")   DmaFillModePending = bool.Parse(args[1]);
+                else if (args[0] == "VdpDataAddr")          VdpDataAddr = ushort.Parse(args[1], NumberStyles.HexNumber);
+                else if (args[0] == "VdpDataCode")          VdpDataCode = byte.Parse(args[1]);
+                else
+                    Console.WriteLine("Skipping unrecognized identifier " + args[0]);
+            }
+
+            for (int i = 0; i < CRAM.Length; i++)
+                ProcessPalette(i);
+            for (int i = 0; i < VRAM.Length; i++)
+                UpdatePatternBuffer(i);
+        }
     }
 }
\ No newline at end of file
diff --git a/BizHawk.Emulation/Consoles/Sega/Genesis/Genesis.cs b/BizHawk.Emulation/Consoles/Sega/Genesis/Genesis.cs
index f781572533..92a0067acc 100644
--- a/BizHawk.Emulation/Consoles/Sega/Genesis/Genesis.cs
+++ b/BizHawk.Emulation/Consoles/Sega/Genesis/Genesis.cs
@@ -174,24 +174,56 @@ namespace BizHawk.Emulation.Consoles.Sega
 			}
 		}
 
-		public void SaveStateText(TextWriter writer)
-		{
-			throw new NotImplementedException();
-		}
+        public void SaveStateText(TextWriter writer)
+        {
+            writer.WriteLine("[MegaDrive]");
+            MainCPU.SaveStateText(writer, "Main68K");
+            SoundCPU.SaveStateText(writer);
+            PSG.SaveStateText(writer);
+            VDP.SaveStateText(writer);
 
-		public void LoadStateText(TextReader reader)
-		{
-			throw new NotImplementedException();
-		}
+            writer.Write("MainRAM ");
+            Ram.SaveAsHex(writer);
+            writer.Write("Z80RAM ");
+            Z80Ram.SaveAsHex(writer);
+            
+
+            writer.WriteLine("[/MegaDrive]");
+        }
+
+        public void LoadStateText(TextReader reader)
+        {
+            while (true)
+            {
+                string[] args = reader.ReadLine().Split(' ');
+                if (args[0].Trim() == "") continue;
+                if (args[0] == "[MegaDrive]") continue;
+                if (args[0] == "[/MegaDrive]") break;
+                if (args[0] == "MainRAM")
+                    Ram.ReadFromHex(args[1]);
+                else if (args[0] == "Z80RAM")
+                    Z80Ram.ReadFromHex(args[1]);
+                else if (args[0] == "[Main68K]")
+                    MainCPU.LoadStateText(reader, "Main68K");
+                else if (args[0] == "[Z80]")
+                    SoundCPU.LoadStateText(reader);
+                else if (args[0] == "[PSG]")
+                    PSG.LoadStateText(reader);
+                else if (args[0] == "[VDP]")
+                    VDP.LoadStateText(reader);
+                else
+                    Console.WriteLine("Skipping unrecognized identifier " + args[0]);
+            }
+        }
 
 		public void SaveStateBinary(BinaryWriter writer)
 		{
-			throw new NotImplementedException();
+			//throw new NotImplementedException();
 		}
 
 		public void LoadStateBinary(BinaryReader reader)
 		{
-			throw new NotImplementedException();
+			//throw new NotImplementedException();
 		}
 
 		public byte[] SaveStateBinary()