ppu.cpp

SFC游戏模拟器 snes9x 1.43 的原代码

				uint32 address = (addr & ~PPU.VMA.Mask1) +
					(rem >> PPU.VMA.Shift) +
					((rem & (PPU.VMA.FullGraphicCount - 1)) << 3);
				IPPU.VRAMReadBuffer = READ_WORD(Memory.VRAM+((address << 1) & 0xFFFF));
			} else
				IPPU.VRAMReadBuffer = READ_WORD(Memory.VRAM+((PPU.VMA.Address << 1) & 0xffff));
#else
			IPPU.FirstVRAMRead = TRUE;
#endif
			break;

		  case 0x2118:
			// VRAM write data (low)
#ifndef CORRECT_VRAM_READS
			IPPU.FirstVRAMRead = TRUE;
#endif
			REGISTER_2118(Byte);
			break;

		  case 0x2119:
			// VRAM write data (high)
#ifndef CORRECT_VRAM_READS
			IPPU.FirstVRAMRead = TRUE;
#endif
			REGISTER_2119(Byte);
			break;

		  case 0x211a:
			// Mode 7 outside rotation area display mode and flipping
			if (Byte != Memory.FillRAM [0x211a])
			{
				FLUSH_REDRAW ();
				PPU.Mode7Repeat = Byte >> 6;
				if (PPU.Mode7Repeat == 1)
					PPU.Mode7Repeat = 0;
				PPU.Mode7VFlip = (Byte & 2) >> 1;
				PPU.Mode7HFlip = Byte & 1;
			}
			break;
		  case 0x211b:
			// Mode 7 matrix A (low & high)
			PPU.MatrixA = ((PPU.MatrixA >> 8) & 0xff) | (Byte << 8);
			PPU.Need16x8Mulitply = TRUE;
			break;
		  case 0x211c:
			// Mode 7 matrix B (low & high)
			PPU.MatrixB = ((PPU.MatrixB >> 8) & 0xff) | (Byte << 8);
			PPU.Need16x8Mulitply = TRUE;
			break;
		  case 0x211d:
			// Mode 7 matrix C (low & high)
			PPU.MatrixC = ((PPU.MatrixC >> 8) & 0xff) | (Byte << 8);
			break;
		  case 0x211e:
			// Mode 7 matrix D (low & high)
			PPU.MatrixD = ((PPU.MatrixD >> 8) & 0xff) | (Byte << 8);
			break;
		  case 0x211f:
			// Mode 7 centre of rotation X (low & high)
			PPU.CentreX = ((PPU.CentreX >> 8) & 0xff) | (Byte << 8);
			break;
		  case 0x2120:
			// Mode 7 centre of rotation Y (low & high)
			PPU.CentreY = ((PPU.CentreY >> 8) & 0xff) | (Byte << 8);
			break;

		  case 0x2121:
			// CG-RAM address
			PPU.CGFLIP = 0;
			PPU.CGFLIPRead = 0;
			PPU.CGADD = Byte;
			break;

		  case 0x2122:
			REGISTER_2122(Byte);
			break;

		  case 0x2123:
			// Window 1 and 2 enable for backgrounds 1 and 2
			if (Byte != Memory.FillRAM [0x2123])
			{
				FLUSH_REDRAW ();
				PPU.ClipWindow1Enable [0] = !!(Byte & 0x02);
				PPU.ClipWindow1Enable [1] = !!(Byte & 0x20);
				PPU.ClipWindow2Enable [0] = !!(Byte & 0x08);
				PPU.ClipWindow2Enable [1] = !!(Byte & 0x80);
				PPU.ClipWindow1Inside [0] = !(Byte & 0x01);
				PPU.ClipWindow1Inside [1] = !(Byte & 0x10);
				PPU.ClipWindow2Inside [0] = !(Byte & 0x04);
				PPU.ClipWindow2Inside [1] = !(Byte & 0x40);
				PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
				if (Byte & 0x80)
					missing.window2[1] = 1;
				if (Byte & 0x20)
					missing.window1[1] = 1;
				if (Byte & 0x08)
					missing.window2[0] = 1;
				if (Byte & 0x02)
					missing.window1[0] = 1;
#endif
			}
			break;
		  case 0x2124:
			// Window 1 and 2 enable for backgrounds 3 and 4
			if (Byte != Memory.FillRAM [0x2124])
			{
				FLUSH_REDRAW ();
				PPU.ClipWindow1Enable [2] = !!(Byte & 0x02);
				PPU.ClipWindow1Enable [3] = !!(Byte & 0x20);
				PPU.ClipWindow2Enable [2] = !!(Byte & 0x08);
				PPU.ClipWindow2Enable [3] = !!(Byte & 0x80);
				PPU.ClipWindow1Inside [2] = !(Byte & 0x01);
				PPU.ClipWindow1Inside [3] = !(Byte & 0x10);
				PPU.ClipWindow2Inside [2] = !(Byte & 0x04);
				PPU.ClipWindow2Inside [3] = !(Byte & 0x40);
				PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
				if (Byte & 0x80)
					missing.window2[3] = 1;
				if (Byte & 0x20)
					missing.window1[3] = 1;
				if (Byte & 0x08)
					missing.window2[2] = 1;
				if (Byte & 0x02)
					missing.window1[2] = 1;
#endif
			}
			break;
		  case 0x2125:
			// Window 1 and 2 enable for objects and colour window
			if (Byte != Memory.FillRAM [0x2125])
			{
				FLUSH_REDRAW ();
				PPU.ClipWindow1Enable [4] = !!(Byte & 0x02);
				PPU.ClipWindow1Enable [5] = !!(Byte & 0x20);
				PPU.ClipWindow2Enable [4] = !!(Byte & 0x08);
				PPU.ClipWindow2Enable [5] = !!(Byte & 0x80);
				PPU.ClipWindow1Inside [4] = !(Byte & 0x01);
				PPU.ClipWindow1Inside [5] = !(Byte & 0x10);
				PPU.ClipWindow2Inside [4] = !(Byte & 0x04);
				PPU.ClipWindow2Inside [5] = !(Byte & 0x40);
				PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
				if (Byte & 0x80)
					missing.window2[5] = 1;
				if (Byte & 0x20)
					missing.window1[5] = 1;
				if (Byte & 0x08)
					missing.window2[4] = 1;
				if (Byte & 0x02)
					missing.window1[4] = 1;
#endif
			}
			break;
		  case 0x2126:
			// Window 1 left position
			if (Byte != Memory.FillRAM [0x2126])
			{
				FLUSH_REDRAW ();
				PPU.Window1Left = Byte;
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x2127:
			// Window 1 right position
			if (Byte != Memory.FillRAM [0x2127])
			{
				FLUSH_REDRAW ();
				PPU.Window1Right = Byte;
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x2128:
			// Window 2 left position
			if (Byte != Memory.FillRAM [0x2128])
			{
				FLUSH_REDRAW ();
				PPU.Window2Left = Byte;
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x2129:
			// Window 2 right position
			if (Byte != Memory.FillRAM [0x2129])
			{
				FLUSH_REDRAW ();
				PPU.Window2Right = Byte;
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x212a:
			// Windows 1 & 2 overlap logic for backgrounds 1 - 4
			if (Byte != Memory.FillRAM [0x212a])
			{
				FLUSH_REDRAW ();
				PPU.ClipWindowOverlapLogic [0] = (Byte & 0x03);
				PPU.ClipWindowOverlapLogic [1] = (Byte & 0x0c) >> 2;
				PPU.ClipWindowOverlapLogic [2] = (Byte & 0x30) >> 4;
				PPU.ClipWindowOverlapLogic [3] = (Byte & 0xc0) >> 6;
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x212b:
			// Windows 1 & 2 overlap logic for objects and colour window
			if (Byte != Memory.FillRAM [0x212b])
			{
				FLUSH_REDRAW ();
				PPU.ClipWindowOverlapLogic [4] = Byte & 0x03;
				PPU.ClipWindowOverlapLogic [5] = (Byte & 0x0c) >> 2;
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x212c:
			// Main screen designation (backgrounds 1 - 4 and objects)
			if (Byte != Memory.FillRAM [0x212c])
			{
				FLUSH_REDRAW ();
				PPU.RecomputeClipWindows = TRUE;
				Memory.FillRAM [Address] = Byte;
				return;
			}
			break;
		  case 0x212d:
			// Sub-screen designation (backgrounds 1 - 4 and objects)
			if (Byte != Memory.FillRAM [0x212d])
			{
				FLUSH_REDRAW ();
#ifdef DEBUGGER
				if (Byte & 0x1f)
					missing.subscreen = 1;
#endif
				PPU.RecomputeClipWindows = TRUE;
				Memory.FillRAM [Address] = Byte;
				return;
			}
			break;
		  case 0x212e:
			// Window mask designation for main screen ?
			if (Byte != Memory.FillRAM [0x212e])
			{
				FLUSH_REDRAW ();
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x212f:
			// Window mask designation for sub-screen ?
			if (Byte != Memory.FillRAM [0x212f])
			{
				FLUSH_REDRAW ();
				PPU.RecomputeClipWindows = TRUE;
			}
			break;
		  case 0x2130:
			// Fixed colour addition or screen addition
			if (Byte != Memory.FillRAM [0x2130])
			{
				FLUSH_REDRAW ();
				PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
				if ((Byte & 1) && (PPU.BGMode == 3 || PPU.BGMode == 4 || PPU.BGMode == 7))
					missing.direct = 1;
#endif
			}
			break;
		  case 0x2131:
			// Colour addition or subtraction select
			if (Byte != Memory.FillRAM[0x2131])
			{
				FLUSH_REDRAW ();
				// Backgrounds 1 - 4, objects and backdrop colour add/sub enable
#ifdef DEBUGGER
				if (Byte & 0x80)
				{
					// Subtract
					if (Memory.FillRAM[0x2130] & 0x02)
						missing.subscreen_sub = 1;
					else
						missing.fixed_colour_sub = 1;
				}
				else
				{
					// Addition
					if (Memory.FillRAM[0x2130] & 0x02)
						missing.subscreen_add = 1;
					else
						missing.fixed_colour_add = 1;
				}
#endif
				Memory.FillRAM[0x2131] = Byte;
			}
			break;
		  case 0x2132:
			if (Byte != Memory.FillRAM [0x2132])
			{
				FLUSH_REDRAW ();
				// Colour data for fixed colour addition/subtraction
				if (Byte & 0x80)
					PPU.FixedColourBlue = Byte & 0x1f;
				if (Byte & 0x40)
					PPU.FixedColourGreen = Byte & 0x1f;
				if (Byte & 0x20)
					PPU.FixedColourRed = Byte & 0x1f;
			}
			break;
		  case 0x2133:
			// Screen settings
			if (Byte != Memory.FillRAM [0x2133])
			{
#ifdef DEBUGGER
				if (Byte & 0x40)
					missing.mode7_bgmode = 1;
				if (Byte & 0x08)
					missing.pseudo_512 = 1;
#endif
				if (Byte & 0x04)
				{
					PPU.ScreenHeight = SNES_HEIGHT_EXTENDED;
					if(IPPU.DoubleHeightPixels)
						IPPU.RenderedScreenHeight = PPU.ScreenHeight << 1;
					else
						IPPU.RenderedScreenHeight = PPU.ScreenHeight;
#ifdef DEBUGGER
					missing.lines_239 = 1;
#endif
				}
				else PPU.ScreenHeight = SNES_HEIGHT;

#ifdef DEBUGGER
				if (Byte & 0x02)
					missing.sprite_double_height = 1;

				if (Byte & 1)
					missing.interlace = 1;
#endif
				//if((Byte & 1)&&(PPU.BGMode==5||PPU.BGMode==6))
				//IPPU.Interlace=1;
				if((Memory.FillRAM [0x2133] ^ Byte)&3)
				{
					FLUSH_REDRAW ();
					if((Memory.FillRAM [0x2133] ^ Byte)&2)
						IPPU.OBJChanged = TRUE;
                                        if(PPU.BGMode==5||PPU.BGMode==6)
                                            IPPU.Interlace = Byte&1;
					IPPU.InterlaceSprites=0;
					//   IPPU.InterlaceSprites = (Byte&2)>>1;
				}

			}
			break;
		  case 0x2134:
		  case 0x2135:
		  case 0x2136:
			// Matrix 16bit x 8bit multiply result (read-only)
			return;

		  case 0x2137:
			// Software latch for horizontal and vertical timers (read-only)
			return;
		  case 0x2138:
			// OAM read data (read-only)
			return;
		  case 0x2139:
		  case 0x213a:
			// VRAM read data (read-only)
			return;
		  case 0x213b:
			// CG-RAM read data (read-only)
			return;
		  case 0x213c:
		  case 0x213d:
			// Horizontal and vertical (low/high) read counter (read-only)
			return;
		  case 0x213e:
			// PPU status (time over and range over)
			return;
		  case 0x213f:
			// NTSC/PAL select and field (read-only)
			return;
		  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
			_SPCInPB (Address & 3, Byte);
#else	
			//	CPU.Flags |= DEBUG_MODE_FLAG;
			Memory.FillRAM [Address] = Byte;
			IAPU.RAM [(Address & 3) + 0xf4] = Byte;
#ifdef SPC700_SHUTDOWN
			IAPU.APUExecuting = Settings.APUEnabled;
			IAPU.WaitCounter++;
#endif
#endif // SPCTOOL
			break;
		  case 0x2180:
			REGISTER_2180(Byte);
			break;
		  case 0x2181:
			PPU.WRAM &= 0x1FF00;
			PPU.WRAM |= Byte;
			break;
		  case 0x2182:
			PPU.WRAM &= 0x100FF;
			PPU.WRAM |= Byte << 8;
			break;
		  case 0x2183:
			PPU.WRAM &= 0x0FFFF;
			PPU.WRAM |= Byte << 16;
			PPU.WRAM &= 0x1FFFF;
			break;
		}
	}
	else
	{
		if (Settings.SA1)
		{
			if (Address >= 0x2200 && Address <0x23ff)
				S9xSetSA1 (Byte, Address);
			else
				Memory.FillRAM [Address] = Byte;

			return;
		}
		else
			// Dai Kaijyu Monogatari II
			if (Address == 0x2801 && Settings.SRTC)
				S9xSetSRTC (Byte, Address);
			else
				if (Address < 0x3000 || Address >= 0x3000 + 768)
				{
#ifdef DEBUGGER
					missing.unknownppu_write = Address;
					if (Settings.TraceUnknownRegisters)
					{
						sprintf (String, "Unknown register write: $%02X->$%04X\n",
								 Byte, Address);
						S9xMessage (S9X_TRACE, S9X_PPU_TRACE, String);
					}
#endif
				}
				else
				{
					if (!Settings.SuperFX)
					{
						return;
					}

#ifdef ZSNES_FX
					Memory.FillRAM [Address] = Byte;
					if (Address < 0x3040)
						S9xSuperFXWriteReg (Byte, Address);
#else
					switch (Address)
					{
					  case 0x3030:
						if ((Memory.FillRAM [0x3030] ^ Byte) & FLG_G)
						{
							Memory.FillRAM [Address] = Byte;
							// Go flag has been changed
							if (Byte & FLG_G)
								S9xSuperFXExec ();
							else
								FxFlushCache ();
						}
						else
							Memory.FillRAM [Address] = Byte;
						break;

					  case 0x3031:
						Memory.FillRAM [Address] = Byte;
						break;
					  case 0x3033:
						Memory.FillRAM [Address] = Byte;
						break;
					  case 0x3034:
						Memory.FillRAM [Address] = Byte & 0x7f;
						break;
					  case 0x3036:
						Memory.FillRAM [Address] = Byte & 0x7f;
						break;
					  case 0x3037:
						Memory.FillRAM [Address] = Byte;
						break;
					  case 0x3038:
						Memory.FillRAM [Address] = Byte;
						fx_dirtySCBR();
						break;
					  case 0x3039:
						Memory.FillRAM [Address] = Byte;
						break;
					  case 0x303a:
						Memory.FillRAM [Address] = Byte;
						break;
					  case 0x303b:
						break;
					  case 0x303c:
						Memory.FillRAM [Address] = Byte;
						fx_updateRamBank(Byte);
						break;
					  case 0x303f:
						Memory.FillRAM [Address] = Byte;
						break;
					  case 0x301f:
						Memory.FillRAM [Address] = Byte;
						Memory.FillRAM [0x3000 + GSU_SFR] |= FLG_G;
						S9xSuperFXExec ();
						return;

					  default:
						Memory.FillRAM[Address] = Byte;
						if (Address >= 0x3100)
						{
							FxCacheWriteAccess (Address);
						}
						break;
					}
#endif