mirror of https://github.com/bsnes-emu/bsnes.git
160 lines
3.1 KiB
C++
160 lines
3.1 KiB
C++
struct PPU : Thread, PPUcounter {
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alwaysinline auto interlace() const -> bool { return display.interlace; }
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alwaysinline auto overscan() const -> bool { return display.overscan; }
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alwaysinline auto vdisp() const -> uint { return io.overscan ? 240 : 225; }
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PPU();
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~PPU();
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alwaysinline auto step(uint clocks) -> void;
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static auto Enter() -> void;
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auto main() -> void;
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auto load(Markup::Node) -> bool;
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auto power() -> void;
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auto serialize(serializer&) -> void;
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//io.cpp
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alwaysinline auto addressVRAM() const -> uint16;
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alwaysinline auto readVRAM() -> uint16;
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alwaysinline auto writeVRAM(bool byte, uint8 data) -> void;
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alwaysinline auto readOAM(uint10 addr) -> uint8;
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alwaysinline auto writeOAM(uint10 addr, uint8 data) -> void;
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alwaysinline auto readCGRAM(bool byte, uint8 addr) -> uint8;
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alwaysinline auto writeCGRAM(uint8 addr, uint15 data) -> void;
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auto readIO(uint24 addr, uint8 data) -> uint8;
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auto writeIO(uint24 addr, uint8 data) -> void;
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auto latchCounters() -> void;
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auto updateVideoMode() -> void;
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private:
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struct VRAM {
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auto& operator[](uint addr) { return data[addr & mask]; }
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uint16 data[64 * 1024];
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uint mask = 0x7fff;
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} vram;
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uint32* output = nullptr;
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struct {
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bool interlace;
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bool overscan;
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} display;
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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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struct {
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uint version;
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uint8 mdr;
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} ppu1, ppu2;
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struct Latches {
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uint16 vram;
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uint8 oam;
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uint8 cgram;
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uint8 bgofsPPU1;
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uint3 bgofsPPU2;
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uint8 mode7;
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uint1 counters;
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uint1 hcounter;
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uint1 vcounter;
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uint10 oamAddress;
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uint8 cgramAddress;
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} latch;
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struct IO {
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//$2100 INIDISP
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bool displayDisable;
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uint4 displayBrightness;
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//$2102 OAMADDL
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//$2103 OAMADDH
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uint10 oamBaseAddress;
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uint10 oamAddress;
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bool oamPriority;
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//$2105 BGMODE
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bool bgPriority;
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uint8 bgMode;
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//$210d BG1HOFS
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uint16 hoffsetMode7;
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//$210e BG1VOFS
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uint16 voffsetMode7;
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//$2115 VMAIN
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bool vramIncrementMode;
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uint2 vramMapping;
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uint8 vramIncrementSize;
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//$2116 VMADDL
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//$2117 VMADDH
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uint16 vramAddress;
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//$211a M7SEL
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uint2 repeatMode7;
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bool vflipMode7;
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bool hflipMode7;
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//$211b M7A
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uint16 m7a;
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//$211c M7B
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uint16 m7b;
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//$211d M7C
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uint16 m7c;
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//$211e M7D
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uint16 m7d;
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//$211f M7X
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uint16 m7x;
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//$2120 M7Y
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uint16 m7y;
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//$2121 CGADD
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uint8 cgramAddress;
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uint1 cgramAddressLatch;
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//$2133 SETINI
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bool extbg;
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bool pseudoHires;
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bool overscan;
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bool interlace;
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//$213c OPHCT
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uint16 hcounter;
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//$213d OPVCT
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uint16 vcounter;
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} io;
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#include "background/background.hpp"
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#include "object/object.hpp"
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#include "window/window.hpp"
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#include "screen/screen.hpp"
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Background bg1;
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Background bg2;
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Background bg3;
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Background bg4;
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Object obj;
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Window window;
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Screen screen;
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friend class PPU::Background;
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friend class PPU::Object;
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friend class PPU::Window;
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friend class PPU::Screen;
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friend class System;
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};
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extern PPU ppu;
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