From 6fb0c7a7a53e1eba7a0f5dc5b1ade312a0d76119 Mon Sep 17 00:00:00 2001
From: Toad King
Date: Thu, 14 Jun 2012 03:21:06 -0400
Subject: initial pocketsnes commit

---
 src/ppu_getppu.h | 407 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 407 insertions(+)
 create mode 100644 src/ppu_getppu.h

(limited to 'src/ppu_getppu.h')

diff --git a/src/ppu_getppu.h b/src/ppu_getppu.h
new file mode 100644
index 0000000..eb4eb62
--- /dev/null
+++ b/src/ppu_getppu.h
@@ -0,0 +1,407 @@
+static uint8 GetPPU_2102 (uint16 Address)
+{
+	return (uint8) (PPU.OAMAddr);
+}
+
+static uint8 GetPPU_2103 (uint16 Address)
+{
+	return (((PPU.OAMAddr >> 8) & 1) | (PPU.OAMPriorityRotation << 7));
+}
+
+static uint8 GetPPU_RAM (uint16 Address)
+{
+	return (Memory.FillRAM[Address]);
+}
+
+static uint8 GetPPU_2116 (uint16 Address)
+{
+	return (uint8) (PPU.VMA.Address);
+}
+
+static uint8 GetPPU_2117 (uint16 Address)
+{
+	return (PPU.VMA.Address >> 8);
+}
+
+static uint8 GetPPU_2121 (uint16 Address)
+{
+	return (PPU.CGADD);
+}
+
+static uint8 GetPPU_213x (uint16 Address)
+{
+	if (PPU.Need16x8Mulitply)
+	{
+		int32 r = (int32) PPU.MatrixA * (int32) (PPU.MatrixB >> 8);
+
+		Memory.FillRAM[0x2134] = (uint8) r;
+		Memory.FillRAM[0x2135] = (uint8) (r >> 8);
+		Memory.FillRAM[0x2136] = (uint8) (r >> 16);
+		PPU.Need16x8Mulitply = FALSE;
+	}
+	return (Memory.FillRAM[Address]);
+}
+
+static uint8 GetPPU_2137 (uint16 Address)
+{
+#ifdef DEBUGGER
+	missing.h_v_latch = 1;
+#endif
+#if 0
+#ifdef CPU_SHUTDOWN
+	CPU.WaitAddress = CPU.PCAtOpcodeStart;
+#endif
+#endif
+	PPU.HVBeamCounterLatched = 1;
+	PPU.VBeamPosLatched = (uint16)
+	CPU.V_Counter;
+	PPU.HBeamPosLatched = (uint16) ((CPU.Cycles * SNES_HCOUNTER_MAX) / Settings.H_Max);
+
+	// Causes screen flicker for Yoshi's Island if uncommented
+	//CLEAR_IRQ_SOURCE (PPU_V_BEAM_IRQ_SOURCE | PPU_H_BEAM_IRQ_SOURCE);
+
+	if (SNESGameFixes.NeedInit0x2137)
+		PPU.VBeamFlip = 0; //jyam sword world sfc2 & godzill
+	return (0);
+}
+
+static uint8 GetPPU_2138 (uint16 Address)
+{
+	uint8 byte = 0;
+
+	// Read OAM (sprite) control data
+	if(PPU.OAMAddr&0x100){
+		if (!(PPU.OAMFlip&1))
+		{
+			byte = PPU.OAMData [(PPU.OAMAddr&0x10f) << 1];
+		}
+		else
+		{
+			byte = PPU.OAMData [((PPU.OAMAddr&0x10f) << 1) + 1];
+			PPU.OAMAddr=(PPU.OAMAddr+1)&0x1ff;
+		}
+	} else {
+		if (!(PPU.OAMFlip&1))
+		{
+			byte = PPU.OAMData [PPU.OAMAddr << 1];
+		}
+		else
+		{
+			byte = PPU.OAMData [(PPU.OAMAddr << 1) + 1];
+			++PPU.OAMAddr;
+		}
+	}
+	PPU.OAMFlip ^= 1;
+
+	return (byte);
+
+}
+
+static uint8 GetPPU_2139 (uint16 Address)
+{
+	uint8 byte = 0;
+	// Read vram low byte
+#ifdef DEBUGGER
+	missing.vram_read = 1;
+#endif
+	if (IPPU.FirstVRAMRead)
+	byte = Memory.VRAM[(PPU.VMA.Address << 1)&0xFFFF];
+	else if (PPU.VMA.FullGraphicCount)
+	{
+		uint32 addr = PPU.VMA.Address - 1;
+		uint32 rem = addr & PPU.VMA.Mask1;
+		uint32 address =
+			(addr & ~PPU.VMA.Mask1)
+				+ (rem >> PPU.VMA.Shift)
+				+ ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3);
+		byte = Memory.VRAM[((address << 1) - 2) & 0xFFFF];
+	}
+	else
+		byte = Memory.VRAM[((PPU.VMA.Address << 1) - 2) & 0xffff];
+
+	if (!PPU.VMA.High)
+	{
+		PPU.VMA.Address += PPU.VMA.Increment;
+		IPPU.FirstVRAMRead = FALSE;
+	}
+	return byte;
+}
+
+static uint8 GetPPU_213A (uint16 Address)
+{
+	uint8 byte = 0;
+	// Read vram high byte
+#ifdef DEBUGGER
+	missing.vram_read = 1;
+#endif
+	if (IPPU.FirstVRAMRead)
+		byte = Memory.VRAM[((PPU.VMA.Address << 1) + 1) & 0xffff];
+	else if (PPU.VMA.FullGraphicCount)
+	{
+		uint32 addr = PPU.VMA.Address - 1;
+		uint32 rem = addr & PPU.VMA.Mask1;
+		uint32 address =
+			(addr & ~PPU.VMA.Mask1)
+				+ (rem >> PPU.VMA.Shift)
+				+ ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3);
+		byte = Memory.VRAM[((address << 1) - 1) & 0xFFFF];
+	}
+	else
+		byte = Memory.VRAM[((PPU.VMA.Address << 1) - 1) & 0xFFFF];
+	if (PPU.VMA.High)
+	{
+		PPU.VMA.Address += PPU.VMA.Increment;
+		IPPU.FirstVRAMRead = FALSE;
+	}
+	return byte;
+}
+
+static uint8 GetPPU_213B (uint16 Address)
+{
+	uint8 byte = 0;
+	// Read palette data
+#ifdef DEBUGGER
+	missing.cgram_read = 1;
+#endif
+	if (PPU.CGFLIPRead)
+		byte = PPU.CGDATA[PPU.CGADD++] >> 8;
+	else
+		byte = PPU.CGDATA[PPU.CGADD] & 0xff;
+
+	PPU.CGFLIPRead ^= 1;
+	return (byte);
+}
+	    
+static uint8 GetPPU_213C (uint16 Address)
+{
+	uint8 byte = 0;
+	// Horizontal counter value 0-339
+#ifdef DEBUGGER
+	missing.h_counter_read = 1;
+#endif
+	if (PPU.HBeamFlip)
+		byte = PPU.HBeamPosLatched >> 8;
+	else
+		byte = (uint8) PPU.HBeamPosLatched;
+	PPU.HBeamFlip ^= 1;
+	return byte;
+}
+
+static uint8 GetPPU_213D (uint16 Address)
+{
+	uint8 byte = 0;
+	// Vertical counter value 0-262
+#ifdef DEBUGGER
+	missing.v_counter_read = 1;
+#endif
+	if (PPU.VBeamFlip)
+		byte = PPU.VBeamPosLatched >> 8;
+	else
+		byte = (uint8) PPU.VBeamPosLatched;
+	PPU.VBeamFlip ^= 1;
+	return byte;
+}
+
+static uint8 GetPPU_213E (uint16 Address)
+{
+	// PPU time and range over flags
+	return (SNESGameFixes._0x213E_ReturnValue);
+}
+
+static uint8 GetPPU_213F (uint16 Address)
+{
+	// NTSC/PAL and which field flags
+	PPU.VBeamFlip = PPU.HBeamFlip = 0;
+	return ((Settings.PAL ? 0x10 : 0) | (Memory.FillRAM[0x213f] & 0xc0));
+}
+
+static uint8 GetPPU_APUR (uint16 Address)
+{
+/*
+	case 0x2140: case 0x2141: case 0x2142: case 0x2143:
+	case 0x2144: case 0x2145: case 0x2146: case 0x2147:
+	case 0x2148: case 0x2149: case 0x214a: case 0x214b:
+	case 0x214c: case 0x214d: case 0x214e: case 0x214f:
+	case 0x2150: case 0x2151: case 0x2152: case 0x2153:
+	case 0x2154: case 0x2155: case 0x2156: case 0x2157:
+	case 0x2158: case 0x2159: case 0x215a: case 0x215b:
+	case 0x215c: case 0x215d: case 0x215e: case 0x215f:
+	case 0x2160: case 0x2161: case 0x2162: case 0x2163:
+	case 0x2164: case 0x2165: case 0x2166: case 0x2167:
+	case 0x2168: case 0x2169: case 0x216a: case 0x216b:
+	case 0x216c: case 0x216d: case 0x216e: case 0x216f:
+	case 0x2170: case 0x2171: case 0x2172: case 0x2173:
+	case 0x2174: case 0x2175: case 0x2176: case 0x2177:
+	case 0x2178: case 0x2179: case 0x217a: case 0x217b:
+	case 0x217c: case 0x217d: case 0x217e: case 0x217f:
+*/
+#ifdef SPCTOOL
+	return ((uint8) _SPCOutP[Address & 3]);
+#else
+	//	CPU.Flags |= DEBUG_MODE_FLAG;
+#ifdef SPC700_SHUTDOWN
+	CPU.APU_APUExecuting =	Settings.APUEnabled;
+	IAPU.WaitCounter++;
+#endif
+	if(Settings.APUEnabled)
+	{
+#ifdef CPU_SHUTDOWN
+		//CPU.WaitAddress = CPU.PCAtOpcodeStart;
+#endif
+		if (!SNESGameFixes.APU_OutPorts_ReturnValueFix) return (APU.OutPorts[Address & 3]); // early exit
+		if(Address >= 0x2140
+			&& Address <= 0x2143
+			&& !CPU.V_Counter)
+		{
+			return (uint8) ((Address & 1) ? 
+				((rand() & 0xff00) >> 8) : (rand() & 0xff));
+		}
+		return (APU.OutPorts[Address & 3]);
+	}
+/*
+	switch (Settings.SoundSkipMethod)
+	{
+		case 3 :
+		case 0 :
+		case 1 :
+*/
+			#ifdef ASMCPU
+			CPU.rstatus |= (1<<(24-2));
+			#endif
+			CPU.BranchSkip = TRUE;
+/*
+			break;
+		case 2 :
+			break;
+	}
+*/
+	if ((Address & 3) < 2)
+	{
+		int r = rand();
+		if (r & 2)
+		{
+			if (r & 4)
+				return ((Address & 3) == 1 ? 0xaa : 0xbb);
+			else
+				return ((r >> 3) & 0xff);
+		}
+	}
+	else
+	{
+		int r = rand();
+		if (r & 2)
+			return ((r >> 3) & 0xff);
+	}
+	return (Memory.FillRAM[Address]);
+#endif // SPCTOOL
+}
+
+static uint8 GetPPU_2180 (uint16 Address)
+{
+	uint8 byte = 0;
+	// Read WRAM
+#ifdef DEBUGGER
+	missing.wram_read = 1;
+#endif
+	byte = Memory.RAM[PPU.WRAM++];
+	PPU.WRAM &= 0x1FFFF;
+	return byte;
+}
+
+static uint8 GetPPU_ZERO (uint16 Address)
+{
+	return 0;
+}
+
+static uint8 GetPPU_ONE (uint16 Address)
+{
+	return 1;
+}
+
+uint8 (*GetPPU[])(uint16 Address) = {
+	GetPPU_RAM,  GetPPU_RAM,  GetPPU_2102,  GetPPU_2103,  GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
+	GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,
+	GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM, GetPPU_RAM, GetPPU_2116, GetPPU_2117,
+	GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,
+	GetPPU_RAM,  GetPPU_2121,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
+	GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,
+	GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_213x, GetPPU_213x, GetPPU_213x, GetPPU_2137,
+	GetPPU_2138, GetPPU_2139, GetPPU_213A, GetPPU_213B, GetPPU_213C, GetPPU_213D, GetPPU_213E, GetPPU_213F,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
+	GetPPU_2180, GetPPU_RAM,  GetPPU_RAM,  GetPPU_RAM,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,
+	GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,  GetPPU_ZERO,
+	GetPPU_ONE
+};
+
+uint8 S9xGetPPU (uint16 Address)
+{
+	uint8 byte = 0;
+	if(Address<0x2100)//not a real PPU reg
+		return 0; //treat as unmapped memory returning last byte on the bus
+    if (Address <= 0x2190){
+		return GetPPU[Address - 0x2100](Address);
+    } else
+	{
+	#ifdef USE_SA1
+		if (Settings.SA1)
+			return (S9xGetSA1(Address));
+	#endif
+		if (Address <= 0x2fff || Address >= 0x3000 + 768)
+		{
+			switch (Address)
+			{
+				case 0x21c2 :
+					return (0x20);
+				case 0x21c3 :
+					return (0);
+				case 0x2800 :
+					// For Dai Kaijyu Monogatari II
+					if (Settings.SRTC)
+						return (S9xGetSRTC(Address));
+					/*FALL*/
+	
+				default :
+	#ifdef DEBUGGER
+					missing.unknownppu_read = Address;
+					if (Settings.TraceUnknownRegisters)
+					{
+						sprintf(String, "Unknown register read: $%04X\n", Address);
+						S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String);
+					}
+	#endif
+					// XXX:
+					return (0); //Memory.FillRAM[Address]);
+			}
+		}
+	
+		if (!Settings.SuperFX)
+			return (0x30);
+			byte = Memory.FillRAM[Address];
+	
+		//if (Address != 0x3030 && Address != 0x3031)
+		//printf ("%04x\n", Address);
+	#ifdef CPU_SHUTDOWN
+		if (Address == 0x3030)
+		{
+			CPU.WaitAddress = CPU.PCAtOpcodeStart;
+			#ifdef ASMCPU
+			CPU.rstatus |= (1<<(24-3));
+			#endif
+		}
+		else
+	#endif
+		if (Address == 0x3031)
+		{
+			CLEAR_IRQ_SOURCE(GSU_IRQ_SOURCE);
+			Memory.FillRAM[0x3031] = byte & 0x7f;
+		}
+		return (byte);
+	}
+}
-- 
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