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Amiga: better emulation, part 2

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This commit is contained in:
tildearrow 2023-03-10 04:22:21 -05:00
parent 6d33fadbc5
commit dca18dc726
2 changed files with 234 additions and 18 deletions
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20
src/engine/platform/amiga.h
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@ -37,7 +37,7 @@ class DivPlatformAmiga: public DivDispatch {
unsigned char volPos;
int sample, wave;
int busClock;
bool useWave, setPos, useV, useP, dmaOn, audDatClock;
bool useWave, setPos, useV, useP, dmaOn, audDatClock, writeVol;
DivWaveSynth ws;
Channel():
SharedChannel<signed char>(64),
@ -58,7 +58,8 @@ class DivPlatformAmiga: public DivDispatch {
useV(false),
useP(false),
dmaOn(false),
audDatClock(false) {}
audDatClock(false),
writeVol(true) {}
};
Channel chan[4];
DivDispatchOscBuffer* oscBuf[4];
@ -72,7 +73,9 @@ class DivPlatformAmiga: public DivDispatch {
bool audInt[4]; // interrupt on
bool audEn[4]; // audio DMA on
bool useP[4]; // period modulation
bool useV[4]; // volume modulatiom
bool useV[4]; // volume modulation
bool dmaEn;
unsigned int audLoc[4]; // address
unsigned short audLen[4]; // length
@ -84,7 +87,7 @@ class DivPlatformAmiga: public DivDispatch {
// internal state
int audTick[4]; // tick of period
unsigned int dmaLoc[4]; // address
unsigned short dmaPos[4]; // position
unsigned short dmaLen[4]; // position
bool audByte[4]; // which byte of audDat to output
unsigned char volPos; // position of volume PWM
@ -104,6 +107,8 @@ class DivPlatformAmiga: public DivDispatch {
unsigned int sampleOff[256];
bool sampleLoaded[256];
unsigned short regPool[256];
unsigned char* sampleMem;
size_t sampleMemLen;
@ -113,12 +118,17 @@ class DivPlatformAmiga: public DivDispatch {
friend void putDispatchChan(void*,int,int);
void irq(int ch);
void rWrite(unsigned short addr, unsigned short val);
void updateWave(int ch);
public:
void acquire(short** buf, size_t len);
int dispatch(DivCommand c);
void* getChanState(int chan);
DivDispatchOscBuffer* getOscBuffer(int chan);
unsigned char* getRegisterPool();
int getRegisterPoolSize();
int getRegisterPoolDepth();
void reset();
void forceIns();
void tick(bool sysTick=true);
@ -131,6 +141,8 @@ class DivPlatformAmiga: public DivDispatch {
void notifyWaveChange(int wave);
void notifyInsDeletion(void* ins);
void renderSamples(int chipID);
void poke(unsigned int addr, unsigned short val);
void poke(std::vector<DivRegWrite>& wlist);
const char** getRegisterSheet();
const void* getSampleMem(int index=0);
size_t getSampleMemCapacity(int index=0);