mirror of https://github.com/bsnes-emu/bsnes.git
121 lines
2.3 KiB
C++
121 lines
2.3 KiB
C++
struct PPU : Thread {
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static auto Enter() -> void;
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auto main() -> void;
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auto step(uint clocks) -> void;
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auto scanline() -> void;
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auto frame() -> void;
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auto refresh() -> void;
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auto power() -> void;
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auto reset() -> void;
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//memory.cpp
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auto readCIRAM(uint11 addr) -> uint8;
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auto writeCIRAM(uint11 addr, uint8 data) -> void;
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auto readCGRAM(uint5 addr) -> uint8;
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auto writeCGRAM(uint5 addr, uint8 data) -> void;
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auto readIO(uint16 addr) -> uint8;
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auto writeIO(uint16 addr, uint8 data) -> void;
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//render.cpp
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auto enable() const -> bool;
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auto loadCHR(uint16 addr) -> uint8;
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auto renderPixel() -> void;
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auto renderSprite() -> void;
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auto renderScanline() -> void;
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//serialization.cpp
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auto serialize(serializer&) -> void;
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struct IO {
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//internal
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uint8 mdr;
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uint1 field;
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uint lx;
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uint ly;
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uint8 busData;
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union {
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uint value;
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NaturalBitField<uint, 0, 4> tileX;
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NaturalBitField<uint, 5, 9> tileY;
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NaturalBitField<uint,10,11> nametable;
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NaturalBitField<uint,10,10> nametableX;
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NaturalBitField<uint,11,11> nametableY;
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NaturalBitField<uint,12,14> fineY;
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NaturalBitField<uint, 0,14> address;
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NaturalBitField<uint, 0, 7> addressLo;
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NaturalBitField<uint, 8,14> addressHi;
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NaturalBitField<uint,15,15> latch;
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NaturalBitField<uint,16,18> fineX;
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} v, t;
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bool nmiHold;
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bool nmiFlag;
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//$2000
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uint vramIncrement;
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uint spriteAddress;
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uint bgAddress;
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uint spriteHeight;
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bool masterSelect;
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bool nmiEnable;
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//$2001
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bool grayscale;
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bool bgEdgeEnable;
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bool spriteEdgeEnable;
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bool bgEnable;
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bool spriteEnable;
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uint3 emphasis;
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//$2002
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bool spriteOverflow;
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bool spriteZeroHit;
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//$2003
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uint8 oamAddress;
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} io;
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struct OAM {
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//serialization.cpp
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auto serialize(serializer&) -> void;
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uint8 id = 64;
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uint8 y = 0xff;
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uint8 tile = 0xff;
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uint8 attr = 0xff;
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uint8 x = 0xff;
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uint8 tiledataLo = 0;
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uint8 tiledataHi = 0;
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};
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struct Latches {
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uint16 nametable;
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uint16 attribute;
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uint16 tiledataLo;
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uint16 tiledataHi;
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uint oamIterator;
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uint oamCounter;
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OAM oam[8]; //primary
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OAM soam[8]; //secondary
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} latch;
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uint8 ciram[2048];
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uint8 cgram[32];
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uint8 oam[256];
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uint32 buffer[256 * 262];
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};
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extern PPU ppu;
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