NES - start mapper 80

2012-02-25 03:39:31 +00:00 · 2012-02-25 03:39:31 +00:00 · ee9f493976
parent f2a60888ce
commit ee9f493976
1 changed files with 127 additions and 0 deletions
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Taito_X1_005.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Taito_X1_005.cs
@ -0,0 +1,127 @@
+using System;
+using System.IO;
+using System.Diagnostics;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	//AKA mapper 80
+
+	//Minelvaton Saga
+	//Taito Grand Prix - Eikou heno License
+
+
+/*
+* Registers:
+---------------------------
+
+  $7EF0-7EF5:  CHR Regs
+
+  $7EF6:  [.... ...M]  Mirroring
+    0 = Horz
+    1 = Vert
+
+  $7EFA,7EFB:  PRG Reg 0 (8k @ $8000)
+  $7EFC,7EFD:  PRG Reg 1 (8k @ $A000)
+  $7EFE,7EFF:  PRG Reg 2 (8k @ $C000)
+
+
+CHR Setup:
+---------------------------
+
+       $0000   $0400   $0800   $0C00   $1000   $1400   $1800   $1C00 
+     +---------------+---------------+-------+-------+-------+-------+
+     |    <$7EF0>    |    <$7EF1>    | $7EF2 | $7EF3 | $7EF4 | $7EF5 |
+     +---------------+---------------+-------+-------+-------+-------+
+
+PRG Setup:
+---------------------------
+
+      $8000   $A000   $C000   $E000  
+    +-------+-------+-------+-------+
+    | $7EFA | $7EFC | $7EFE | { -1} |
+    +-------+-------+-------+-------+
+*/
+
+	class TAITO_X1_005 : NES.NESBoardBase
+	{
+		int prg, chr;
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+		}
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			//configure
+			switch (Cart.board_type)
+			{
+				case "TAITO-X1-005":
+					break;
+				default:
+					return false;
+			}
+
+			SetMirrorType(Cart.pad_h, Cart.pad_v);
+			return true;
+		}
+
+		public override void WriteWRAM(int addr, byte value)
+		{
+			switch (addr)
+			{
+				case 0x7EF6:
+					if (value.Bit(0))
+						SetMirrorType(EMirrorType.Vertical);
+					else
+						SetMirrorType(EMirrorType.Horizontal);
+					break;
+
+				case 0x7EF0:
+					chr = 0;
+					break;
+				case 0x7EF1:
+					chr = 1;
+					break;
+				case 0x7EF2:
+					chr = 2;
+					break;
+				case 0x7EF3:
+					chr = 3;
+					break;
+				case 0x7EF4:
+					chr = 4;
+					break;
+				case 0X7EF5:
+					chr = 5;
+					break;
+
+				case 0x7EFA: //PRG Reg 0
+				case 0x7EFB:
+					prg = 0;
+					break;
+				case 0x7EFC: //PRG Reg 1
+				case 0x7EFD:
+					prg = 1;
+					break;
+				case 0x7EFE: //PRG Reg 2
+				case 0x7EFF:
+					prg = 2;
+					break;
+			}
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			return ROM[(addr & 0x01FFF)+ (prg * 0x2000)];
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			if (chr < 2)
+				return VROM[(addr & 0x7FF) + (chr * 0x800)];
+			else
+				return VROM[(addr & 0x3FF) + 0x800 + (chr * 0x400)];
+		}
+	}
+}