mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-02-22 06:02:28 +01:00
7a68059f78
byuu says: Changelog: - fixed FC AxROM / VRC7 regression - BitField split to BooleanBitField/NaturalBitField (in preparation for IntegerBitField) - BitFieldReference removed - GB CPU cleaned up - GB Cartridge + Mappers cleaned up - SFC CGRAM is now emulated as uint15[256] instead of uint[512] - sfc/ppu/memory.cpp no longer needed; removed - purged SFC Debugger hooks for now (some of the operator[] calls were bypassing them anyway) Unfortunately, for reasons that defy all semblance of logic, the CGRAM change caused a slight speed hit. As have the last few changes. We're now down to around 129.5fps compared to 123.fps for v099 and 134.5fps at our peak (v099r01-r02). I really like the style I came up with for the Game Boy mappers to settle the purpose(ROM,RAM) vs (rom,ram)Purpose naming convention. If I ever get around to redoing the NES mappers, that's likely the approach I'll take.
86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
//Sony CXP1100Q-1
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struct SMP : Processor::SPC700, Thread {
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alwaysinline auto step(uint clocks) -> void;
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alwaysinline auto synchronizeCPU() -> void;
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alwaysinline auto synchronizeDSP() -> void;
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auto readPort(uint2 port) const -> uint8;
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auto writePort(uint2 port, uint8 data) -> 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 reset() -> void;
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auto serialize(serializer&) -> void;
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uint8 iplrom[64];
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uint8 apuram[64 * 1024];
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privileged:
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struct {
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//timing
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uint clockCounter;
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uint dspCounter;
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uint timerStep;
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//$00f0
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uint8 clockSpeed;
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uint8 timerSpeed;
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bool timersEnable;
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bool ramDisable;
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bool ramWritable;
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bool timersDisable;
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//$00f1
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bool iplromEnable;
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//$00f2
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uint8 dspAddr;
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//$00f8,$00f9
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uint8 ram00f8;
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uint8 ram00f9;
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} status;
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static auto Enter() -> void;
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//memory.cpp
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auto readRAM(uint16 addr) -> uint8;
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auto writeRAM(uint16 addr, uint8 data) -> void;
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auto readBus(uint16 addr) -> uint8;
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auto writeBus(uint16 addr, uint8 data) -> void;
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auto io() -> void override;
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auto read(uint16 addr) -> uint8 override;
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auto write(uint16 addr, uint8 data) -> void override;
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auto readDisassembler(uint16 addr) -> uint8 override;
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//timing.cpp
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template<uint Frequency>
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struct Timer {
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uint8 stage0;
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uint8 stage1;
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uint8 stage2;
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uint4 stage3;
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bool line;
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bool enable;
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uint8 target;
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auto tick() -> void;
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auto synchronizeStage1() -> void;
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};
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Timer<192> timer0;
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Timer<192> timer1;
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Timer< 24> timer2;
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alwaysinline auto addClocks(uint clocks) -> void;
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alwaysinline auto cycleEdge() -> void;
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};
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extern SMP smp;
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