From d40ae99422e118188a7f48055dc340c6aca022aa Mon Sep 17 00:00:00 2001 From: Kitty Draper Date: Sat, 5 Mar 2011 21:39:25 -0500 Subject: first commit --- source/ppu.h | 633 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 633 insertions(+) create mode 100644 source/ppu.h (limited to 'source/ppu.h') diff --git a/source/ppu.h b/source/ppu.h new file mode 100644 index 0000000..99dde34 --- /dev/null +++ b/source/ppu.h @@ -0,0 +1,633 @@ +/******************************************************************************* + Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. + + (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and + Jerremy Koot (jkoot@snes9x.com) + + (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net) + + (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net), + funkyass (funkyass@spam.shaw.ca), + Joel Yliluoma (http://iki.fi/bisqwit/) + Kris Bleakley (codeviolation@hotmail.com), + Matthew Kendora, + Nach (n-a-c-h@users.sourceforge.net), + Peter Bortas (peter@bortas.org) and + zones (kasumitokoduck@yahoo.com) + + C4 x86 assembler and some C emulation code + (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com), + _Demo_ (_demo_@zsnes.com), and Nach + + C4 C++ code + (c) Copyright 2003 Brad Jorsch + + DSP-1 emulator code + (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson, + John Weidman, neviksti (neviksti@hotmail.com), + Kris Bleakley, Andreas Naive + + DSP-2 emulator code + (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and + Lord Nightmare (lord_nightmare@users.sourceforge.net + + OBC1 emulator code + (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and + Kris Bleakley + Ported from x86 assembler to C by sanmaiwashi + + SPC7110 and RTC C++ emulator code + (c) Copyright 2002 Matthew Kendora with research by + zsKnight, John Weidman, and Dark Force + + S-DD1 C emulator code + (c) Copyright 2003 Brad Jorsch with research by + Andreas Naive and John Weidman + + S-RTC C emulator code + (c) Copyright 2001 John Weidman + + ST010 C++ emulator code + (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora + + Super FX x86 assembler emulator code + (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault + + Super FX C emulator code + (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman + + + SH assembler code partly based on x86 assembler code + (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) + + + Specific ports contains the works of other authors. See headers in + individual files. + + Snes9x homepage: http://www.snes9x.com + + Permission to use, copy, modify and distribute Snes9x in both binary and + source form, for non-commercial purposes, is hereby granted without fee, + providing that this license information and copyright notice appear with + all copies and any derived work. + + This software is provided 'as-is', without any express or implied + warranty. In no event shall the authors be held liable for any damages + arising from the use of this software. + + Snes9x is freeware for PERSONAL USE only. Commercial users should + seek permission of the copyright holders first. Commercial use includes + charging money for Snes9x or software derived from Snes9x. + + The copyright holders request that bug fixes and improvements to the code + should be forwarded to them so everyone can benefit from the modifications + in future versions. + + Super NES and Super Nintendo Entertainment System are trademarks of + Nintendo Co., Limited and its subsidiary companies. +*******************************************************************************/ + +#ifndef _PPU_H_ +#define _PPU_H_ + +#define FIRST_VISIBLE_LINE 1 + +extern uint8 GetBank; +extern uint16 SignExtend [2]; + +#define TILE_2BIT 0 +#define TILE_4BIT 1 +#define TILE_8BIT 2 + +#define MAX_2BIT_TILES 4096 +#define MAX_4BIT_TILES 2048 +#define MAX_8BIT_TILES 1024 + +#define PPU_H_BEAM_IRQ_SOURCE (1 << 0) +#define PPU_V_BEAM_IRQ_SOURCE (1 << 1) +#define GSU_IRQ_SOURCE (1 << 2) +#define SA1_IRQ_SOURCE (1 << 7) +#define SA1_DMA_IRQ_SOURCE (1 << 5) + +struct ClipData { + uint32 Count [6]; + uint32 Left [6][6]; + uint32 Right [6][6]; +}; + +struct InternalPPU { + bool8 ColorsChanged; + uint8 HDMA; + bool8 HDMAStarted; + uint8 MaxBrightness; + bool8 LatchedBlanking; + bool8 OBJChanged; + bool8 RenderThisFrame; + bool8 DirectColourMapsNeedRebuild; + uint32 FrameCount; + uint32 RenderedFramesCount; + uint32 DisplayedRenderedFrameCount; + uint32 SkippedFrames; + uint32 FrameSkip; + uint8 *TileCache [3]; + uint8 *TileCached [3]; +#ifdef CORRECT_VRAM_READS + uint16 VRAMReadBuffer; +#else + bool8 FirstVRAMRead; +#endif + bool8 DoubleHeightPixels; + bool8 Interlace; + bool8 InterlaceSprites; + bool8 DoubleWidthPixels; + int RenderedScreenHeight; + int RenderedScreenWidth; + uint32 Red [256]; + uint32 Green [256]; + uint32 Blue [256]; + uint8 *XB; + uint16 ScreenColors [256]; + int PreviousLine; + int CurrentLine; + int Controller; + uint32 Joypads[5]; + uint32 SuperScope; + uint32 Mouse[2]; + int PrevMouseX[2]; + int PrevMouseY[2]; + struct ClipData Clip [2]; +}; + +struct SOBJ +{ + short HPos; + uint16 VPos; + uint16 Name; + uint8 VFlip; + uint8 HFlip; + uint8 Priority; + uint8 Palette; + uint8 Size; +}; + +struct SPPU { + uint8 BGMode; + uint8 BG3Priority; + uint8 Brightness; + + struct { + bool8 High; + uint8 Increment; + uint16 Address; + uint16 Mask1; + uint16 FullGraphicCount; + uint16 Shift; + } VMA; + + struct { + uint16 SCBase; + uint16 VOffset; + uint16 HOffset; + uint8 BGSize; + uint16 NameBase; + uint16 SCSize; + } BG [4]; + + bool8 CGFLIP; + uint16 CGDATA [256]; + uint8 FirstSprite; + uint8 LastSprite; + struct SOBJ OBJ [128]; + uint8 OAMPriorityRotation; + uint16 OAMAddr; + uint8 RangeTimeOver; + + uint8 OAMFlip; + uint16 OAMTileAddress; + uint16 IRQVBeamPos; + uint16 IRQHBeamPos; + uint16 VBeamPosLatched; + uint16 HBeamPosLatched; + + uint8 HBeamFlip; + uint8 VBeamFlip; + uint8 HVBeamCounterLatched; + + short MatrixA; + short MatrixB; + short MatrixC; + short MatrixD; + short CentreX; + short CentreY; + uint8 Joypad1ButtonReadPos; + uint8 Joypad2ButtonReadPos; + + uint8 CGADD; + uint8 FixedColourRed; + uint8 FixedColourGreen; + uint8 FixedColourBlue; + uint16 SavedOAMAddr; + uint16 ScreenHeight; + uint32 WRAM; + uint8 BG_Forced; + bool8 ForcedBlanking; + bool8 OBJThroughMain; + bool8 OBJThroughSub; + uint8 OBJSizeSelect; + uint16 OBJNameBase; + bool8 OBJAddition; + uint8 OAMReadFlip; + uint8 OAMData [512 + 32]; + bool8 VTimerEnabled; + bool8 HTimerEnabled; + short HTimerPosition; + uint8 Mosaic; + bool8 BGMosaic [4]; + bool8 Mode7HFlip; + bool8 Mode7VFlip; + uint8 Mode7Repeat; + uint8 Window1Left; + uint8 Window1Right; + uint8 Window2Left; + uint8 Window2Right; + uint8 ClipCounts [6]; + uint8 ClipWindowOverlapLogic [6]; + uint8 ClipWindow1Enable [6]; + uint8 ClipWindow2Enable [6]; + bool8 ClipWindow1Inside [6]; + bool8 ClipWindow2Inside [6]; + bool8 RecomputeClipWindows; + uint8 CGFLIPRead; + uint16 OBJNameSelect; + bool8 Need16x8Mulitply; + uint8 Joypad3ButtonReadPos; + uint8 MouseSpeed[2]; + + // XXX Do these need to be added to snapshot.cpp? + uint16 OAMWriteRegister; + uint8 BGnxOFSbyte; + uint8 OpenBus1; + uint8 OpenBus2; +}; + +#define CLIP_OR 0 +#define CLIP_AND 1 +#define CLIP_XOR 2 +#define CLIP_XNOR 3 + +struct SDMA { + bool8 TransferDirection; + bool8 AAddressFixed; + bool8 AAddressDecrement; + uint8 TransferMode; + + uint8 ABank; + uint16 AAddress; + uint16 Address; + uint8 BAddress; + + // General DMA only: + uint16 TransferBytes; + + // H-DMA only: + bool8 HDMAIndirectAddressing; + uint16 IndirectAddress; + uint8 IndirectBank; + uint8 Repeat; + uint8 LineCount; + uint8 FirstLine; +}; + +START_EXTERN_C +void S9xUpdateScreen (); +void S9xResetPPU (); +void S9xSoftResetPPU (); +void S9xFixColourBrightness (); +void S9xUpdateJoypads (); +void S9xProcessMouse(int which1); +void S9xSuperFXExec (); + +void S9xSetPPU (uint8 Byte, uint16 Address); +uint8 S9xGetPPU (uint16 Address); +void S9xSetCPU (uint8 Byte, uint16 Address); +uint8 S9xGetCPU (uint16 Address); + +void S9xInitC4 (); +void S9xSetC4 (uint8 Byte, uint16 Address); +uint8 S9xGetC4 (uint16 Address); +void S9xSetC4RAM (uint8 Byte, uint16 Address); +uint8 S9xGetC4RAM (uint16 Address); + +extern struct SPPU PPU; +extern struct SDMA DMA [8]; +extern struct InternalPPU IPPU; +END_EXTERN_C + +#include "gfx.h" +#include "memmap.h" + +typedef struct{ + uint8 _5C77; + uint8 _5C78; + uint8 _5A22; +} SnesModel; + +START_EXTERN_C +extern SnesModel* Model; +extern SnesModel M1SNES; +extern SnesModel M2SNES; +END_EXTERN_C + +#define MAX_5C77_VERSION 0x01 +#define MAX_5C78_VERSION 0x03 +#define MAX_5A22_VERSION 0x02 + +STATIC inline uint8 REGISTER_4212() +{ + GetBank = 0; + if (CPU.V_Counter >= PPU.ScreenHeight + FIRST_VISIBLE_LINE && + CPU.V_Counter < PPU.ScreenHeight + FIRST_VISIBLE_LINE + 3) + GetBank = 1; + + GetBank |= CPU.Cycles >= Settings.HBlankStart ? 0x40 : 0; + if (CPU.V_Counter >= PPU.ScreenHeight + FIRST_VISIBLE_LINE) + GetBank |= 0x80; /* XXX: 0x80 or 0xc0 ? */ + + return (GetBank); +} + +STATIC inline void FLUSH_REDRAW () +{ + if (IPPU.PreviousLine != IPPU.CurrentLine) + S9xUpdateScreen (); +} + +STATIC inline void REGISTER_2104 (uint8 byte) +{ + if (PPU.OAMAddr & 0x100) + { + int addr = ((PPU.OAMAddr & 0x10f) << 1) + (PPU.OAMFlip & 1); + if (byte != PPU.OAMData [addr]){ + FLUSH_REDRAW (); + PPU.OAMData [addr] = byte; + IPPU.OBJChanged = TRUE; + + // X position high bit, and sprite size (x4) + struct SOBJ *pObj = &PPU.OBJ [(addr & 0x1f) * 4]; + + pObj->HPos = (pObj->HPos & 0xFF) | SignExtend[(byte >> 0) & 1]; + pObj++->Size = byte & 2; + pObj->HPos = (pObj->HPos & 0xFF) | SignExtend[(byte >> 2) & 1]; + pObj++->Size = byte & 8; + pObj->HPos = (pObj->HPos & 0xFF) | SignExtend[(byte >> 4) & 1]; + pObj++->Size = byte & 32; + pObj->HPos = (pObj->HPos & 0xFF) | SignExtend[(byte >> 6) & 1]; + pObj->Size = byte & 128; + } + PPU.OAMFlip ^= 1; + if(!(PPU.OAMFlip & 1)){ + ++PPU.OAMAddr; + PPU.OAMAddr &= 0x1ff; + if (PPU.OAMPriorityRotation && PPU.FirstSprite != (PPU.OAMAddr >> 1)) + { + PPU.FirstSprite = (PPU.OAMAddr&0xFE) >> 1; + IPPU.OBJChanged = TRUE; + } + } else { + if (PPU.OAMPriorityRotation && (PPU.OAMAddr&1)) IPPU.OBJChanged = TRUE; + } + } else if(!(PPU.OAMFlip & 1)){ + PPU.OAMWriteRegister &= 0xff00; + PPU.OAMWriteRegister |= byte; + PPU.OAMFlip |= 1; + if (PPU.OAMPriorityRotation && (PPU.OAMAddr&1)) IPPU.OBJChanged = TRUE; + } else { + PPU.OAMWriteRegister &= 0x00ff; + uint8 lowbyte = (uint8)(PPU.OAMWriteRegister); + uint8 highbyte = byte; + PPU.OAMWriteRegister |= byte << 8; + + int addr = (PPU.OAMAddr << 1); + + if (lowbyte != PPU.OAMData [addr] || + highbyte != PPU.OAMData [addr+1]) + { + FLUSH_REDRAW (); + PPU.OAMData [addr] = lowbyte; + PPU.OAMData [addr+1] = highbyte; + IPPU.OBJChanged = TRUE; + if (addr & 2) + { + // Tile + PPU.OBJ[addr = PPU.OAMAddr >> 1].Name = PPU.OAMWriteRegister & 0x1ff; + + // priority, h and v flip. + PPU.OBJ[addr].Palette = (highbyte >> 1) & 7; + PPU.OBJ[addr].Priority = (highbyte >> 4) & 3; + PPU.OBJ[addr].HFlip = (highbyte >> 6) & 1; + PPU.OBJ[addr].VFlip = (highbyte >> 7) & 1; + } + else + { + // X position (low) + PPU.OBJ[addr = PPU.OAMAddr >> 1].HPos &= 0xFF00; + PPU.OBJ[addr].HPos |= lowbyte; + + // Sprite Y position + PPU.OBJ[addr].VPos = highbyte; + } + } + PPU.OAMFlip &= ~1; + ++PPU.OAMAddr; + if (PPU.OAMPriorityRotation && PPU.FirstSprite != (PPU.OAMAddr >> 1)) + { + PPU.FirstSprite = (PPU.OAMAddr&0xFE) >> 1; + IPPU.OBJChanged = TRUE; + } + } + + Memory.FillRAM [0x2104] = byte; +} + +STATIC inline void REGISTER_2118 (uint8 Byte) +{ + uint32 address; + if (PPU.VMA.FullGraphicCount) + { + uint32 rem = PPU.VMA.Address & PPU.VMA.Mask1; + address = (((PPU.VMA.Address & ~PPU.VMA.Mask1) + + (rem >> PPU.VMA.Shift) + + ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3)) << 1) & 0xffff; + Memory.VRAM [address] = Byte; + } + else + { + Memory.VRAM[address = (PPU.VMA.Address << 1) & 0xFFFF] = Byte; + } + IPPU.TileCached [TILE_2BIT][address >> 4] = FALSE; + IPPU.TileCached [TILE_4BIT][address >> 5] = FALSE; + IPPU.TileCached [TILE_8BIT][address >> 6] = FALSE; + if (!PPU.VMA.High) + { +#ifdef DEBUGGER + if (Settings.TraceVRAM && !CPU.InDMA) + { + printf ("VRAM write byte: $%04X (%d,%d)\n", PPU.VMA.Address, + Memory.FillRAM[0x2115] & 3, + (Memory.FillRAM [0x2115] & 0x0c) >> 2); + } +#endif + PPU.VMA.Address += PPU.VMA.Increment; + } +// Memory.FillRAM [0x2118] = Byte; +} + +STATIC inline void REGISTER_2118_tile (uint8 Byte) +{ + uint32 address; + uint32 rem = PPU.VMA.Address & PPU.VMA.Mask1; + address = (((PPU.VMA.Address & ~PPU.VMA.Mask1) + + (rem >> PPU.VMA.Shift) + + ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3)) << 1) & 0xffff; + Memory.VRAM [address] = Byte; + IPPU.TileCached [TILE_2BIT][address >> 4] = FALSE; + IPPU.TileCached [TILE_4BIT][address >> 5] = FALSE; + IPPU.TileCached [TILE_8BIT][address >> 6] = FALSE; + if (!PPU.VMA.High) + PPU.VMA.Address += PPU.VMA.Increment; +// Memory.FillRAM [0x2118] = Byte; +} + +STATIC inline void REGISTER_2118_linear (uint8 Byte) +{ + uint32 address; + Memory.VRAM[address = (PPU.VMA.Address << 1) & 0xFFFF] = Byte; + IPPU.TileCached [TILE_2BIT][address >> 4] = FALSE; + IPPU.TileCached [TILE_4BIT][address >> 5] = FALSE; + IPPU.TileCached [TILE_8BIT][address >> 6] = FALSE; + if (!PPU.VMA.High) + PPU.VMA.Address += PPU.VMA.Increment; +// Memory.FillRAM [0x2118] = Byte; +} + +STATIC inline void REGISTER_2119 (uint8 Byte) +{ + uint32 address; + if (PPU.VMA.FullGraphicCount) + { + uint32 rem = PPU.VMA.Address & PPU.VMA.Mask1; + address = ((((PPU.VMA.Address & ~PPU.VMA.Mask1) + + (rem >> PPU.VMA.Shift) + + ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3)) << 1) + 1) & 0xFFFF; + Memory.VRAM [address] = Byte; + } + else + { + Memory.VRAM[address = ((PPU.VMA.Address << 1) + 1) & 0xFFFF] = Byte; + } + IPPU.TileCached [TILE_2BIT][address >> 4] = FALSE; + IPPU.TileCached [TILE_4BIT][address >> 5] = FALSE; + IPPU.TileCached [TILE_8BIT][address >> 6] = FALSE; + if (PPU.VMA.High) + { +#ifdef DEBUGGER + if (Settings.TraceVRAM && !CPU.InDMA) + { + printf ("VRAM write word: $%04X (%d,%d)\n", PPU.VMA.Address, + Memory.FillRAM[0x2115] & 3, + (Memory.FillRAM [0x2115] & 0x0c) >> 2); + } +#endif + PPU.VMA.Address += PPU.VMA.Increment; + } +// Memory.FillRAM [0x2119] = Byte; +} + +STATIC inline void REGISTER_2119_tile (uint8 Byte) +{ + uint32 rem = PPU.VMA.Address & PPU.VMA.Mask1; + uint32 address = ((((PPU.VMA.Address & ~PPU.VMA.Mask1) + + (rem >> PPU.VMA.Shift) + + ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3)) << 1) + 1) & 0xFFFF; + Memory.VRAM [address] = Byte; + IPPU.TileCached [TILE_2BIT][address >> 4] = FALSE; + IPPU.TileCached [TILE_4BIT][address >> 5] = FALSE; + IPPU.TileCached [TILE_8BIT][address >> 6] = FALSE; + if (PPU.VMA.High) + PPU.VMA.Address += PPU.VMA.Increment; +// Memory.FillRAM [0x2119] = Byte; +} + +STATIC inline void REGISTER_2119_linear (uint8 Byte) +{ + uint32 address; + Memory.VRAM[address = ((PPU.VMA.Address << 1) + 1) & 0xFFFF] = Byte; + IPPU.TileCached [TILE_2BIT][address >> 4] = FALSE; + IPPU.TileCached [TILE_4BIT][address >> 5] = FALSE; + IPPU.TileCached [TILE_8BIT][address >> 6] = FALSE; + if (PPU.VMA.High) + PPU.VMA.Address += PPU.VMA.Increment; +// Memory.FillRAM [0x2119] = Byte; +} + +STATIC inline void REGISTER_2122(uint8 Byte) +{ + // CG-RAM (palette) write + + if (PPU.CGFLIP) + { + if ((Byte & 0x7f) != (PPU.CGDATA[PPU.CGADD] >> 8)) + { + if (Settings.SixteenBit) + FLUSH_REDRAW (); + PPU.CGDATA[PPU.CGADD] &= 0x00FF; + PPU.CGDATA[PPU.CGADD] |= (Byte & 0x7f) << 8; + IPPU.ColorsChanged = TRUE; + if (Settings.SixteenBit) + { + IPPU.Blue [PPU.CGADD] = IPPU.XB [(Byte >> 2) & 0x1f]; + IPPU.Green [PPU.CGADD] = IPPU.XB [(PPU.CGDATA[PPU.CGADD] >> 5) & 0x1f]; + IPPU.ScreenColors [PPU.CGADD] = (uint16) BUILD_PIXEL (IPPU.Red [PPU.CGADD], + IPPU.Green [PPU.CGADD], + IPPU.Blue [PPU.CGADD]); + } + } + PPU.CGADD++; + } + else + { + if (Byte != (uint8) (PPU.CGDATA[PPU.CGADD] & 0xff)) + { + if (Settings.SixteenBit) + FLUSH_REDRAW (); + PPU.CGDATA[PPU.CGADD] &= 0x7F00; + PPU.CGDATA[PPU.CGADD] |= Byte; + IPPU.ColorsChanged = TRUE; + if (Settings.SixteenBit) + { + IPPU.Red [PPU.CGADD] = IPPU.XB [Byte & 0x1f]; + IPPU.Green [PPU.CGADD] = IPPU.XB [(PPU.CGDATA[PPU.CGADD] >> 5) & 0x1f]; + IPPU.ScreenColors [PPU.CGADD] = (uint16) BUILD_PIXEL (IPPU.Red [PPU.CGADD], + IPPU.Green [PPU.CGADD], + IPPU.Blue [PPU.CGADD]); + } + } + } + PPU.CGFLIP ^= 1; +// Memory.FillRAM [0x2122] = Byte; +} + +STATIC inline void REGISTER_2180(uint8 Byte) +{ + Memory.RAM[PPU.WRAM++] = Byte; + PPU.WRAM &= 0x1FFFF; + Memory.FillRAM [0x2180] = Byte; +} + + +//Platform specific input functions used by PPU.CPP +void JustifierButtons(uint32&); +bool JustifierOffscreen(); + +#endif + -- cgit v1.2.3