121 lines
3.8 KiB
C++
121 lines
3.8 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _FMSHARED_OPN_H
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#define _FMSHARED_OPN_H
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#include "fmsharedbase.h"
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#define PLEASE_HELP_ME(_targetChan) \
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int boundaryBottom=parent->calcBaseFreq(chipClock,CHIP_FREQBASE,0,false); \
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int boundaryTop=parent->calcBaseFreq(chipClock,CHIP_FREQBASE,12,false); \
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int destFreq=NOTE_FNUM_BLOCK(c.value2,11); \
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int newFreq; \
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bool return2=false; \
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if (_targetChan.portaPause) { \
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if (parent->song.oldOctaveBoundary) { \
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if ((_targetChan.portaPauseFreq&0xf800)>(_targetChan.baseFreq&0xf800)) { \
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_targetChan.baseFreq=((_targetChan.baseFreq&0x7ff)>>1)|(_targetChan.portaPauseFreq&0xf800); \
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} else { \
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_targetChan.baseFreq=((_targetChan.baseFreq&0x7ff)<<1)|(_targetChan.portaPauseFreq&0xf800); \
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} \
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c.value*=2; \
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} else { \
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_targetChan.baseFreq=_targetChan.portaPauseFreq; \
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} \
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} \
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if (destFreq>_targetChan.baseFreq) { \
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newFreq=_targetChan.baseFreq+c.value; \
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if (newFreq>=destFreq) { \
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newFreq=destFreq; \
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return2=true; \
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} \
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} else { \
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newFreq=_targetChan.baseFreq-c.value; \
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if (newFreq<=destFreq) { \
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newFreq=destFreq; \
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return2=true; \
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} \
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} \
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/* check for octave boundary */ \
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/* what the heck! */ \
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if (!_targetChan.portaPause) { \
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if ((newFreq&0x7ff)>boundaryTop && (newFreq&0xf800)<0x3800) { \
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if (parent->song.fbPortaPause) { \
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_targetChan.portaPauseFreq=(boundaryBottom)|((newFreq+0x800)&0xf800); \
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_targetChan.portaPause=true; \
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break; \
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} else { \
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newFreq=((newFreq&0x7ff)>>1)|((newFreq+0x800)&0xf800); \
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} \
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} \
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if ((newFreq&0x7ff)<boundaryBottom && (newFreq&0xf800)>0) { \
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if (parent->song.fbPortaPause) { \
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_targetChan.portaPauseFreq=newFreq=(boundaryTop-1)|((newFreq-0x800)&0xf800); \
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_targetChan.portaPause=true; \
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break; \
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} else { \
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newFreq=((newFreq&0x7ff)<<1)|((newFreq-0x800)&0xf800); \
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} \
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} \
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} \
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_targetChan.portaPause=false; \
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_targetChan.freqChanged=true; \
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_targetChan.baseFreq=newFreq; \
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if (return2) { \
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_targetChan.inPorta=false; \
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return 2; \
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}
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class DivPlatformOPN: public DivPlatformFMBase {
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protected:
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const unsigned short ADDR_MULT_DT=0x30;
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const unsigned short ADDR_TL=0x40;
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const unsigned short ADDR_RS_AR=0x50;
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const unsigned short ADDR_AM_DR=0x60;
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const unsigned short ADDR_DT2_D2R=0x70;
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const unsigned short ADDR_SL_RR=0x80;
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const unsigned short ADDR_SSG=0x90;
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const unsigned short ADDR_FREQ=0xa0;
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const unsigned short ADDR_FREQH=0xa4;
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const unsigned short ADDR_FB_ALG=0xb0;
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const unsigned short ADDR_LRAF=0xb4;
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const unsigned short opOffs[4]={
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0x00, 0x04, 0x08, 0x0c
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};
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double fmFreqBase;
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unsigned int fmDivBase;
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unsigned int ayDiv;
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bool extSys;
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DivConfig ayFlags;
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DivPlatformOPN(double f=9440540.0, unsigned int d=72, unsigned int a=32, bool isExtSys=false):
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DivPlatformFMBase(),
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fmFreqBase(f),
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fmDivBase(d),
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ayDiv(a),
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extSys(isExtSys) {}
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};
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#endif
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