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OPN(A/B/2/B-B): fix absolutely everything

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This commit is contained in:
tildearrow 2022-05-22 23:47:41 -05:00
parent 3d4f2cfa13
commit 2fa51e482a
16 changed files with 89 additions and 489 deletions
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61
src/engine/platform/fmshared_OPN.h
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@ -32,4 +32,65 @@
#define ADDR_FB_ALG 0xb0
#define ADDR_LRAF 0xb4
#define PLEASE_HELP_ME(_targetChan) \
int boundaryBottom=parent->calcBaseFreq(chipClock,CHIP_FREQBASE,0,false); \
int boundaryTop=parent->calcBaseFreq(chipClock,CHIP_FREQBASE,12,false); \
int destFreq=NOTE_FNUM_BLOCK(c.value2,11); \
int newFreq; \
bool return2=false; \
if (_targetChan.portaPause) { \
if (parent->song.oldOctaveBoundary) { \
if ((_targetChan.portaPauseFreq&0xf800)>(_targetChan.baseFreq&0xf800)) { \
_targetChan.baseFreq=((_targetChan.baseFreq&0x7ff)>>1)|(_targetChan.portaPauseFreq&0xf800); \
} else { \
_targetChan.baseFreq=((_targetChan.baseFreq&0x7ff)<<1)|(_targetChan.portaPauseFreq&0xf800); \
} \
c.value*=2; \
} else { \
_targetChan.baseFreq=_targetChan.portaPauseFreq; \
} \
} \
if (destFreq>_targetChan.baseFreq) { \
newFreq=_targetChan.baseFreq+c.value; \
if (newFreq>=destFreq) { \
newFreq=destFreq; \
return2=true; \
} \
} else { \
newFreq=_targetChan.baseFreq-c.value; \
if (newFreq<=destFreq) { \
newFreq=destFreq; \
return2=true; \
} \
} \
/* check for octave boundary */ \
/* what the heck! */ \
if (!_targetChan.portaPause) { \
if ((newFreq&0x7ff)>boundaryTop && (newFreq&0xf800)<0x3800) { \
if (parent->song.fbPortaPause) { \
_targetChan.portaPauseFreq=(boundaryBottom)|((newFreq+0x800)&0xf800); \
_targetChan.portaPause=true; \
break; \
} else { \
newFreq=((newFreq&0x7ff)>>1)|((newFreq+0x800)&0xf800); \
} \
} \
if ((newFreq&0x7ff)<boundaryBottom && (newFreq&0xf800)>0) { \
if (parent->song.fbPortaPause) { \
_targetChan.portaPauseFreq=newFreq=(boundaryTop-1)|((newFreq-0x800)&0xf800); \
_targetChan.portaPause=true; \
break; \
} else { \
newFreq=((newFreq&0x7ff)<<1)|((newFreq-0x800)&0xf800); \
} \
} \
} \
_targetChan.portaPause=false; \
_targetChan.freqChanged=true; \
_targetChan.baseFreq=newFreq; \
if (return2) { \
_targetChan.inPorta=false; \
return 2; \
}
#endif