NES - start BANDAI-FCG-1 board (mappers 69 + 159)

2011-09-18 02:49:09 +00:00 · 2011-09-18 02:49:09 +00:00 · 7c55b343ae
parent a121ef1c77
commit 7c55b343ae
1 changed files with 152 additions and 0 deletions
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/BANDAI-FCG-1.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/BANDAI-FCG-1.cs
@ -0,0 +1,152 @@
+using System;
+using System.IO;
+using System.Diagnostics;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	//AKA mapper 16 & 159
+	/*
+		Example Games:
+	--------------------------
+	Dragon Ball - Dai Maou Jukkatsu      (016)
+	Dragon Ball Z Gaiden                 (016)
+	Dragon Ball Z 2                      (016)
+	Rokudenashi Blues                    (016)
+	Akuma-kun - Makai no Wana            (016)
+	Dragon Ball Z - Kyoushuu! Saiya Jin  (159)
+	SD Gundam Gaiden                     (159)
+	Magical Taruruuto Kun 1, 2           (159)
+	
+	PRG_ROM: 128KB
+	PRG_RAM: None
+	CHR-ROM: 128KB
+	CHR_RAM: None
+	No Batter
+	Mapper controlled mirroring
+	No CIC present
+	*/
+
+	class BANDAI_FCG_1 : NES.NESBoardBase 
+	{
+		//configuration
+		int prg, chr_bank_mask_1k, mirror;
+		bool irq_countdown, irq_enabled, irq_asserted;
+		ushort irq_counter;
+		int clock_counter;
+
+		int addr_reg;
+		ByteBuffer regs = new ByteBuffer(12);
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "BANDAI-FCG-1":
+					AssertPrg(128); AssertChr(128); AssertWram(0); AssertVram(0);
+					break;
+				default:
+					return false;
+			}
+			return true;
+		}
+
+		protected void BaseConfigure()
+		{
+			chr_bank_mask_1k = Cart.chr_size - 1;
+			SetMirrorType(EMirrorType.Vertical);
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			return ROM[addr + (prg * 0x8000)];
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			switch (addr)
+			{
+				case 0: case 1: case 2: case 3:
+				case 4: case 5: case 6: case 7:
+					regs[addr_reg] = value;
+					break;
+				case 8:
+					prg = value;
+					break;
+				case 9:
+					mirror = value & 0x03;
+					switch (mirror)
+					{
+						case 0: SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical); break;
+						case 1: SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal); break;
+						case 2: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenA); break;
+						case 3: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenB); break;
+					}
+					break;
+				case 0xA:
+					irq_enabled = value.Bit(0);
+					break;
+				case 0xB:
+					irq_counter &= 0xFF00;
+					irq_counter |= value;
+					break;
+				case 0xC:
+					irq_counter &= 0x00FF;
+					irq_counter |= (ushort)(value << 8);
+					break;
+				case 0xD:
+					break;
+			}
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			//return VRAM[addr + chr];
+			return base.ReadPPU(addr);
+		}
+
+		public override void WritePPU(int addr, byte value)
+		{
+			//VRAM[addr + chr] = value;
+			base.WritePPU(addr, value);
+		}
+
+		void SyncIrq()
+		{
+			NES.irq_cart = irq_asserted;
+		}
+
+		public override void ClockPPU()
+		{
+			clock_counter++;
+			if (clock_counter == 3)
+			{
+				ClockCPU();
+				clock_counter = 0;
+			}
+		}
+
+		void ClockCPU()
+		{
+			if (!irq_countdown) return;
+			irq_counter--;
+			if (irq_counter == 0x0000)
+			{
+				irq_asserted = true;
+				SyncIrq();
+			}
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("prg", ref prg);
+			ser.Sync("chr_bank_mask_1k", ref chr_bank_mask_1k);
+			ser.Sync("mirror", ref mirror);
+			ser.Sync("irq_counter", ref irq_counter);
+			ser.Sync("irq_countdown", ref irq_countdown);
+			ser.Sync("irq_enabled", ref irq_enabled);
+			ser.Sync("irq_asserted", ref irq_asserted);
+			ser.Sync("clock_counter", ref clock_counter);
+		}
+	}
+}