mirror of https://github.com/bsnes-emu/bsnes.git
159 lines
2.6 KiB
C++
159 lines
2.6 KiB
C++
struct Registers {
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struct SoundBias {
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uint10 level;
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uint2 amplitude;
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operator uint16() const;
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uint16 operator=(uint16 source);
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SoundBias& operator=(const SoundBias&) = delete;
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} bias;
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unsigned clock;
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} regs;
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struct Sweep {
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uint3 shift;
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uint1 direction;
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uint3 frequency;
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uint1 enable;
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uint1 negate;
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uint3 period;
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};
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struct Envelope {
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uint3 frequency;
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uint1 direction;
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uint4 volume;
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uint3 period;
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inline bool dacenable() const { return volume || direction; }
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};
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struct Square {
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Envelope envelope;
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uint1 enable;
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uint6 length;
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uint2 duty;
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uint11 frequency;
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uint1 counter;
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uint1 initialize;
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signed shadowfrequency;
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uint1 signal;
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uint4 output;
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unsigned period;
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uint3 phase;
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uint4 volume;
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void run();
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void clocklength();
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void clockenvelope();
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};
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struct Square1 : Square {
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Sweep sweep;
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void runsweep(bool update);
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void clocksweep();
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uint8 read(unsigned addr) const;
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void write(unsigned addr, uint8 byte);
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void power();
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} square1;
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struct Square2 : Square {
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uint8 read(unsigned addr) const;
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void write(unsigned addr, uint8 byte);
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void power();
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} square2;
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struct Wave {
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uint1 mode;
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uint1 bank;
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uint1 dacenable;
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uint8 length;
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uint3 volume;
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uint11 frequency;
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uint1 counter;
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uint1 initialize;
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uint4 pattern[32];
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uint1 enable;
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uint4 output;
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uint4 patternaddr;
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uint1 patternbank;
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uint4 patternsample;
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unsigned period;
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void run();
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void clocklength();
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uint8 read(unsigned addr) const;
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void write(unsigned addr, uint8 byte);
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uint8 readram(unsigned addr) const;
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void writeram(unsigned addr, uint8 byte);
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void power();
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} wave;
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struct Noise {
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Envelope envelope;
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uint6 length;
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uint3 divisor;
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uint1 narrowlfsr;
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uint4 frequency;
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uint1 counter;
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uint1 initialize;
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uint1 enable;
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uint15 lfsr;
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uint4 output;
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unsigned period;
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uint4 volume;
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unsigned divider() const;
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void run();
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void clocklength();
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void clockenvelope();
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uint8 read(unsigned addr) const;
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void write(unsigned addr, uint8 byte);
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void power();
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} noise;
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struct Sequencer {
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uint2 volume;
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uint3 lvolume;
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uint3 rvolume;
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uint1 lenable[4];
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uint1 renable[4];
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uint1 enable[4];
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uint1 masterenable;
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uint12 base;
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uint3 step;
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int16 lsample;
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int16 rsample;
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uint8 read(unsigned addr) const;
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void write(unsigned addr, uint8 byte);
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void power();
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} sequencer;
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struct FIFO {
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int8 sample[32];
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int8 output;
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uint5 rdoffset;
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uint5 wroffset;
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uint6 size;
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uint1 volume; //0 = 50%, 1 = 100%
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uint1 lenable;
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uint1 renable;
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uint1 timer;
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void read();
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void write(int8 byte);
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void reset();
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void power();
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} fifo[2];
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