aboutsummaryrefslogtreecommitdiff
path: root/source/ppu.h
diff options
context:
space:
mode:
Diffstat (limited to 'source/ppu.h')
-rw-r--r--source/ppu.h426
1 files changed, 321 insertions, 105 deletions
diff --git a/source/ppu.h b/source/ppu.h
index 5101f02..d700497 100644
--- a/source/ppu.h
+++ b/source/ppu.h
@@ -5,7 +5,7 @@
#define FIRST_VISIBLE_LINE 1
-extern uint8_t GetBank;
+extern uint8_t GetBank;
extern uint16_t SignExtend [2];
#define TILE_2BIT 0
@@ -22,55 +22,47 @@ extern uint16_t SignExtend [2];
#define SA1_DMA_IRQ_SOURCE (1 << 5)
#define SA1_IRQ_SOURCE (1 << 7)
-struct ClipData
+typedef struct
{
- uint32_t Count [6];
- uint32_t Left [6][6];
- uint32_t Right [6][6];
-};
+ uint32_t Count [6];
+ uint32_t Left [6][6];
+ uint32_t Right [6][6];
+} ClipData;
typedef struct
{
- bool ColorsChanged;
- uint8_t HDMA;
- bool HDMAStarted;
- uint8_t MaxBrightness;
- bool LatchedBlanking;
- bool OBJChanged;
- bool RenderThisFrame;
- bool DirectColourMapsNeedRebuild;
- uint32_t FrameCount;
- uint32_t RenderedFramesCount;
- uint32_t DisplayedRenderedFrameCount;
- uint32_t SkippedFrames;
- uint32_t FrameSkip;
- uint8_t* TileCache [3];
- uint8_t* TileCached [3];
- bool FirstVRAMRead;
- bool DoubleHeightPixels;
- bool Interlace;
- bool InterlaceSprites;
- bool DoubleWidthPixels;
- bool HalfWidthPixels;
- int32_t RenderedScreenHeight;
- int32_t RenderedScreenWidth;
- uint32_t Red [256];
- uint32_t Green [256];
- uint32_t Blue [256];
- uint8_t* XB;
- uint16_t ScreenColors [256];
- int32_t PreviousLine;
- int32_t CurrentLine;
- int32_t Controller;
- uint32_t Joypads[5];
- uint32_t SuperScope;
- uint32_t Mouse[2];
- int32_t PrevMouseX[2];
- int32_t PrevMouseY[2];
- struct ClipData Clip [2];
+ bool ColorsChanged;
+ uint8_t HDMA;
+ bool OBJChanged;
+ bool RenderThisFrame;
+ bool DirectColourMapsNeedRebuild;
+ uint32_t FrameCount;
+ uint8_t* TileCache [3];
+ uint8_t* TileCached [3];
+ bool FirstVRAMRead;
+ bool DoubleHeightPixels;
+ bool Interlace;
+ bool DoubleWidthPixels;
+ bool HalfWidthPixels;
+ int32_t RenderedScreenHeight;
+ int32_t RenderedScreenWidth;
+ uint32_t Red [256];
+ uint32_t Green [256];
+ uint32_t Blue [256];
+ uint8_t* XB;
+ uint16_t ScreenColors [256];
+ int32_t PreviousLine;
+ int32_t CurrentLine;
+ int32_t Controller;
+ uint32_t Joypads [5];
+ uint32_t SuperScope;
+ uint32_t Mouse [2];
+ int32_t PrevMouseX[2];
+ int32_t PrevMouseY[2];
+ ClipData Clip [2];
} InternalPPU;
-struct SOBJ
+typedef struct
{
int16_t HPos;
uint16_t VPos;
@@ -80,7 +72,7 @@ struct SOBJ
uint8_t Priority;
uint8_t Palette;
uint8_t Size;
-};
+} SOBJ;
typedef struct
{
@@ -108,35 +100,31 @@ typedef struct
uint16_t SCSize;
} BG [4];
- bool CGFLIP;
- uint16_t CGDATA [256];
- uint8_t FirstSprite;
- uint8_t LastSprite;
- struct SOBJ OBJ [128];
- uint8_t OAMPriorityRotation;
- uint16_t OAMAddr;
- uint8_t RangeTimeOver;
-
+ bool CGFLIP;
+ uint16_t CGDATA [256];
+ uint8_t FirstSprite;
+ uint8_t UNUSED1;
+ SOBJ OBJ [128];
+ uint8_t OAMPriorityRotation;
+ uint16_t OAMAddr;
+ uint8_t RangeTimeOver;
uint8_t OAMFlip;
- uint16_t OAMTileAddress;
+ uint16_t UNUSED2;
uint16_t IRQVBeamPos;
uint16_t IRQHBeamPos;
uint16_t VBeamPosLatched;
uint16_t HBeamPosLatched;
-
- uint8_t HBeamFlip;
- uint8_t VBeamFlip;
- uint8_t HVBeamCounterLatched;
-
- int16_t MatrixA;
- int16_t MatrixB;
- int16_t MatrixC;
- int16_t MatrixD;
- int16_t CentreX;
- int16_t CentreY;
- uint8_t Joypad1ButtonReadPos;
- uint8_t Joypad2ButtonReadPos;
-
+ uint8_t HBeamFlip;
+ uint8_t VBeamFlip;
+ uint8_t UNUSED3;
+ int16_t MatrixA;
+ int16_t MatrixB;
+ int16_t MatrixC;
+ int16_t MatrixD;
+ int16_t CentreX;
+ int16_t CentreY;
+ uint8_t Joypad1ButtonReadPos;
+ uint8_t Joypad2ButtonReadPos;
uint8_t CGADD;
uint8_t FixedColourRed;
uint8_t FixedColourGreen;
@@ -144,20 +132,20 @@ typedef struct
uint16_t SavedOAMAddr;
uint16_t ScreenHeight;
uint32_t WRAM;
- uint8_t BG_Forced;
+ uint8_t UNUSED4;
bool ForcedBlanking;
- bool OBJThroughMain;
- bool OBJThroughSub;
+ bool UNUSED5;
+ bool UNUSED6;
uint8_t OBJSizeSelect;
uint16_t OBJNameBase;
- bool OBJAddition;
- uint8_t OAMReadFlip;
- uint8_t OAMData [512 + 32];
+ bool UNUSED7;
+ uint8_t UNUSED8;
+ uint8_t OAMData [512 + 32];
bool VTimerEnabled;
bool HTimerEnabled;
int16_t HTimerPosition;
uint8_t Mosaic;
- bool BGMosaic [4];
+ bool BGMosaic [4];
bool Mode7HFlip;
bool Mode7VFlip;
uint8_t Mode7Repeat;
@@ -165,20 +153,18 @@ typedef struct
uint8_t Window1Right;
uint8_t Window2Left;
uint8_t Window2Right;
- uint8_t ClipCounts [6];
+ uint8_t UNUSED9 [6];
uint8_t ClipWindowOverlapLogic [6];
- uint8_t ClipWindow1Enable [6];
- uint8_t ClipWindow2Enable [6];
- bool ClipWindow1Inside [6];
- bool ClipWindow2Inside [6];
+ uint8_t ClipWindow1Enable [6];
+ uint8_t ClipWindow2Enable [6];
+ bool ClipWindow1Inside [6];
+ bool ClipWindow2Inside [6];
bool RecomputeClipWindows;
bool CGFLIPRead;
uint16_t OBJNameSelect;
- bool Need16x8Mulitply;
+ bool Need16x8Multiply;
uint8_t Joypad3ButtonReadPos;
- uint8_t MouseSpeed[2];
-
- // XXX Do these need to be added to snapshot.cpp?
+ uint8_t UNUSED10 [2];
uint16_t OAMWriteRegister;
uint8_t BGnxOFSbyte;
uint8_t OpenBus1;
@@ -192,11 +178,10 @@ typedef struct
typedef struct
{
- bool TransferDirection;
- bool AAddressFixed;
- bool AAddressDecrement;
- uint8_t TransferMode;
-
+ bool TransferDirection;
+ bool AAddressFixed;
+ bool AAddressDecrement;
+ uint8_t TransferMode;
uint8_t ABank;
uint16_t AAddress;
uint16_t Address;
@@ -209,9 +194,9 @@ typedef struct
bool HDMAIndirectAddressing;
uint16_t IndirectAddress;
uint8_t IndirectBank;
- uint8_t Repeat;
+ bool Repeat;
uint8_t LineCount;
- uint8_t FirstLine;
+ bool FirstLine;
} SDMA;
void S9xUpdateScreen();
@@ -251,23 +236,254 @@ extern SnesModel M1SNES;
extern SnesModel M2SNES;
#define MAX_5C77_VERSION 0x01
-#define MAX_5C78_VERSION 0x03
#define MAX_5A22_VERSION 0x02
-
-extern uint8_t REGISTER_4212();
-extern void FLUSH_REDRAW();
-extern void REGISTER_2104(uint8_t byte);
-extern void REGISTER_2118(uint8_t Byte);
-extern void REGISTER_2118_tile(uint8_t Byte);
-extern void REGISTER_2118_linear(uint8_t Byte);
-extern void REGISTER_2119(uint8_t Byte);
-extern void REGISTER_2119_tile(uint8_t Byte);
-extern void REGISTER_2119_linear(uint8_t Byte);
-extern void REGISTER_2122(uint8_t Byte);
-extern void REGISTER_2180(uint8_t Byte);
+#define MAX_5C78_VERSION 0x03
//Platform specific input functions used by PPU.CPP
void JustifierButtons(uint32_t*);
bool JustifierOffscreen();
+static inline void FLUSH_REDRAW()
+{
+ if (IPPU.PreviousLine != IPPU.CurrentLine)
+ S9xUpdateScreen();
+}
+
+static inline void REGISTER_2104(uint8_t byte)
+{
+ if (PPU.OAMAddr & 0x100)
+ {
+ int32_t 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)
+ 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_t lowbyte = (uint8_t)(PPU.OAMWriteRegister);
+ uint8_t highbyte = byte;
+ PPU.OAMWriteRegister |= byte << 8;
+
+ int32_t 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_t Byte)
+{
+ uint32_t address;
+ if (PPU.VMA.FullGraphicCount)
+ {
+ uint32_t 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)
+ PPU.VMA.Address += PPU.VMA.Increment;
+}
+
+static inline void REGISTER_2118_tile(uint8_t Byte)
+{
+ uint32_t address;
+ uint32_t 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;
+}
+
+static inline void REGISTER_2118_linear(uint8_t Byte)
+{
+ uint32_t 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;
+}
+
+static inline void REGISTER_2119(uint8_t Byte)
+{
+ uint32_t address;
+ if (PPU.VMA.FullGraphicCount)
+ {
+ uint32_t 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)
+ PPU.VMA.Address += PPU.VMA.Increment;
+}
+
+static inline void REGISTER_2119_tile(uint8_t Byte)
+{
+ uint32_t rem = PPU.VMA.Address & PPU.VMA.Mask1;
+ uint32_t 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;
+}
+
+static inline void REGISTER_2119_linear(uint8_t Byte)
+{
+ uint32_t 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;
+}
+
+static inline void REGISTER_2122(uint8_t Byte)
+{
+ if (PPU.CGFLIP)
+ {
+ if ((Byte & 0x7f) != (PPU.CGDATA[PPU.CGADD] >> 8))
+ {
+ FLUSH_REDRAW();
+ PPU.CGDATA[PPU.CGADD] &= 0x00FF;
+ PPU.CGDATA[PPU.CGADD] |= (Byte & 0x7f) << 8;
+ IPPU.ColorsChanged = true;
+ 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_t) BUILD_PIXEL(IPPU.Red [PPU.CGADD],
+ IPPU.Green [PPU.CGADD],
+ IPPU.Blue [PPU.CGADD]);
+ }
+ PPU.CGADD++;
+ }
+ else if (Byte != (uint8_t)(PPU.CGDATA[PPU.CGADD] & 0xff))
+ {
+ FLUSH_REDRAW();
+ PPU.CGDATA[PPU.CGADD] &= 0x7F00;
+ PPU.CGDATA[PPU.CGADD] |= Byte;
+ IPPU.ColorsChanged = true;
+ 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_t) BUILD_PIXEL(IPPU.Red [PPU.CGADD], IPPU.Green [PPU.CGADD], IPPU.Blue [PPU.CGADD]);
+ }
+ PPU.CGFLIP = !PPU.CGFLIP;
+}
+
+static inline void REGISTER_2180(uint8_t Byte)
+{
+ Memory.RAM[PPU.WRAM++] = Byte;
+ PPU.WRAM &= 0x1FFFF;
+ Memory.FillRAM [0x2180] = Byte;
+}
+
+static inline uint8_t REGISTER_4212()
+{
+ uint8_t 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;
+}
+
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 03:04:22 +0000