Initial Atari Lynx Support
This commit is contained in:
Waldemar Pawlaszek
parent
47d7e68958
commit
2e4c7ec60a
14 changed files with 1038 additions and 25 deletions
332
src/engine/platform/lynx.cpp
Normal file
332
src/engine/platform/lynx.cpp
Normal file
|
|
@ -0,0 +1,332 @@
|
|||
#include "lynx.h"
|
||||
#include "../engine.h"
|
||||
#include <math.h>
|
||||
|
||||
#define rWrite(a,v) {if (!skipRegisterWrites) {mikey->write(a,v); if (dumpWrites) {addWrite(a,v);}}}
|
||||
|
||||
#define WRITE_VOLUME(ch,v) rWrite(0x20+(ch<<3),(v))
|
||||
#define WRITE_FEEDBACK(ch,v) rWrite(0x21+(ch<<3),(v))
|
||||
#define WRITE_LFSR(ch,v) rWrite(0x23+(ch<<3),(v))
|
||||
#define WRITE_BACKUP(ch,v) rWrite(0x24+(ch<<3),(v))
|
||||
#define WRITE_CONTROL(ch,v) rWrite(0x25+(ch<<3),(v))
|
||||
#define WRITE_OTHER(ch,v) rWrite(0x27+(ch<<3),(v))
|
||||
|
||||
#define CHIP_DIVIDER 64
|
||||
|
||||
#if defined( _MSC_VER )
|
||||
|
||||
#include <intrin.h>
|
||||
|
||||
static int bsr(uint16_t v) {
|
||||
unsigned long idx;
|
||||
if (_BitScanReverse(&idx,(unsigned long)v)) {
|
||||
return idx;
|
||||
}
|
||||
else {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
#elif defined( __GNUC__ )
|
||||
|
||||
static int bsr(uint16_t v)
|
||||
{
|
||||
if (v) {
|
||||
return 16 - __builtin_clz(v);
|
||||
}
|
||||
else{
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static int bsr(uint16_t v)
|
||||
{
|
||||
uint16_t mask = 0x8000;
|
||||
for (int i = 31; i >= 0; --i) {
|
||||
if (v&mask)
|
||||
return (int)i;
|
||||
mask>>=1;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
static int32_t clamp(int32_t v, int32_t lo, int32_t hi)
|
||||
{
|
||||
return v<lo?lo:(v>hi?hi:v);
|
||||
}
|
||||
|
||||
const char* regCheatSheetLynx[]={
|
||||
"DATA", "0",
|
||||
NULL
|
||||
};
|
||||
|
||||
|
||||
const char** DivPlatformLynx::getRegisterSheet() {
|
||||
return regCheatSheetLynx;
|
||||
}
|
||||
|
||||
void DivPlatformLynx::acquire(short* bufL, short* bufR, size_t start, size_t len) {
|
||||
mikey->sampleAudio( bufL + start, bufR + start, len );
|
||||
}
|
||||
|
||||
void DivPlatformLynx::tick() {
|
||||
for (int i=0; i<4; i++) {
|
||||
chan[i].std.next();
|
||||
if (chan[i].std.hadVol) {
|
||||
chan[i].outVol=((chan[i].vol&127)*MIN(127,chan[i].std.vol))>>7;
|
||||
WRITE_VOLUME(i,(isMuted[i]?0:(chan[i].outVol&127)));
|
||||
}
|
||||
if (chan[i].std.hadArp) {
|
||||
if (!chan[i].inPorta) {
|
||||
if (chan[i].std.arpMode) {
|
||||
chan[i].baseFreq=NOTE_PERIODIC(chan[i].std.arp);
|
||||
chan[i].actualNote=chan[i].std.arp;
|
||||
} else {
|
||||
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
|
||||
chan[i].actualNote=chan[i].note+chan[i].std.arp;
|
||||
}
|
||||
chan[i].freqChanged=true;
|
||||
}
|
||||
} else {
|
||||
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
|
||||
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note);
|
||||
chan[i].actualNote=chan[i].note;
|
||||
chan[i].freqChanged=true;
|
||||
}
|
||||
}
|
||||
|
||||
if (chan[i].freqChanged) {
|
||||
chan[i].fd=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true);
|
||||
if (chan[i].resetLFSR) {
|
||||
chan[i].resetLFSR=false;
|
||||
WRITE_LFSR(i, 0);
|
||||
WRITE_OTHER(i, 0);
|
||||
}
|
||||
if (chan[i].std.hadDuty) {
|
||||
chan[i].duty = chan[i].std.duty;
|
||||
WRITE_FEEDBACK(i, chan[i].duty.feedback);
|
||||
}
|
||||
WRITE_BACKUP(i, chan[i].fd.backup);
|
||||
WRITE_CONTROL(i, (chan[i].fd.clockDivider|0x18|chan[i].duty.int_feedback7));
|
||||
}
|
||||
else if (chan[i].std.hadDuty)
|
||||
{
|
||||
chan[i].duty = chan[i].std.duty;
|
||||
WRITE_FEEDBACK(i, chan[i].duty.feedback);
|
||||
WRITE_CONTROL(i, (chan[i].fd.clockDivider|0x18|chan[i].duty.int_feedback7));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int DivPlatformLynx::dispatch(DivCommand c) {
|
||||
switch (c.cmd) {
|
||||
case DIV_CMD_NOTE_ON:
|
||||
if (c.value!=DIV_NOTE_NULL) {
|
||||
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
|
||||
chan[c.chan].freqChanged=true;
|
||||
chan[c.chan].resetLFSR=true;
|
||||
chan[c.chan].note=c.value;
|
||||
chan[c.chan].actualNote=c.value;
|
||||
}
|
||||
chan[c.chan].active=true;
|
||||
WRITE_VOLUME(c.chan,(isMuted[c.chan]?0:(chan[c.chan].vol&127)));
|
||||
chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
|
||||
break;
|
||||
case DIV_CMD_NOTE_OFF:
|
||||
chan[c.chan].active=false;
|
||||
WRITE_VOLUME(c.chan, 0);
|
||||
chan[c.chan].std.init(NULL);
|
||||
break;
|
||||
case DIV_CMD_NOTE_OFF_ENV:
|
||||
case DIV_CMD_ENV_RELEASE:
|
||||
chan[c.chan].std.release();
|
||||
break;
|
||||
case DIV_CMD_INSTRUMENT:
|
||||
chan[c.chan].ins=c.value;
|
||||
//chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
|
||||
break;
|
||||
case DIV_CMD_VOLUME:
|
||||
if (chan[c.chan].vol!=c.value) {
|
||||
chan[c.chan].vol=c.value;
|
||||
if (!chan[c.chan].std.hasVol) {
|
||||
chan[c.chan].outVol=c.value;
|
||||
}
|
||||
if (chan[c.chan].active) WRITE_VOLUME(c.chan,(isMuted[c.chan]?0:(chan[c.chan].vol&127)));
|
||||
}
|
||||
break;
|
||||
case DIV_CMD_GET_VOLUME:
|
||||
if (chan[c.chan].std.hasVol) {
|
||||
return chan[c.chan].vol;
|
||||
}
|
||||
return chan[c.chan].outVol;
|
||||
break;
|
||||
case DIV_CMD_PITCH:
|
||||
chan[c.chan].pitch=c.value;
|
||||
chan[c.chan].freqChanged=true;
|
||||
break;
|
||||
case DIV_CMD_NOTE_PORTA: {
|
||||
int destFreq=NOTE_PERIODIC(c.value2);
|
||||
bool return2=false;
|
||||
if (destFreq>chan[c.chan].baseFreq) {
|
||||
chan[c.chan].baseFreq+=c.value;
|
||||
if (chan[c.chan].baseFreq>=destFreq) {
|
||||
chan[c.chan].baseFreq=destFreq;
|
||||
return2=true;
|
||||
}
|
||||
} else {
|
||||
chan[c.chan].baseFreq-=c.value;
|
||||
if (chan[c.chan].baseFreq<=destFreq) {
|
||||
chan[c.chan].baseFreq=destFreq;
|
||||
return2=true;
|
||||
}
|
||||
}
|
||||
chan[c.chan].freqChanged=true;
|
||||
if (return2) {
|
||||
chan[c.chan].inPorta=false;
|
||||
return 2;
|
||||
}
|
||||
break;
|
||||
}
|
||||
case DIV_CMD_LEGATO:
|
||||
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp):(0)));
|
||||
chan[c.chan].freqChanged=true;
|
||||
chan[c.chan].note=c.value;
|
||||
chan[c.chan].actualNote=c.value;
|
||||
break;
|
||||
case DIV_CMD_PRE_PORTA:
|
||||
if (chan[c.chan].active && c.value2) {
|
||||
if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
|
||||
}
|
||||
chan[c.chan].inPorta=c.value;
|
||||
break;
|
||||
case DIV_CMD_GET_VOLMAX:
|
||||
return 127;
|
||||
break;
|
||||
case DIV_ALWAYS_SET_VOLUME:
|
||||
return 0;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
void DivPlatformLynx::muteChannel(int ch, bool mute) {
|
||||
isMuted[ch]=mute;
|
||||
if (chan[ch].active) WRITE_VOLUME(ch,(isMuted[ch]?0:(chan[ch].outVol&127)));
|
||||
}
|
||||
|
||||
void DivPlatformLynx::forceIns() {
|
||||
for (int i=0; i<4; i++) {
|
||||
if (chan[i].active) {
|
||||
chan[i].insChanged=true;
|
||||
chan[i].freqChanged=true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void* DivPlatformLynx::getChanState(int ch) {
|
||||
return &chan[ch];
|
||||
}
|
||||
|
||||
void DivPlatformLynx::reset() {
|
||||
for (int i=0; i<4; i++) {
|
||||
chan[i]= DivPlatformLynx::Channel();
|
||||
}
|
||||
if (dumpWrites) {
|
||||
addWrite(0xffffffff,0);
|
||||
}
|
||||
}
|
||||
|
||||
bool DivPlatformLynx::keyOffAffectsArp(int ch) {
|
||||
return true;
|
||||
}
|
||||
|
||||
bool DivPlatformLynx::keyOffAffectsPorta(int ch) {
|
||||
return true;
|
||||
}
|
||||
|
||||
//int DivPlatformLynx::getPortaFloor(int ch) {
|
||||
// return 12;
|
||||
//}
|
||||
|
||||
void DivPlatformLynx::notifyInsDeletion(void* ins) {
|
||||
for (int i=0; i<4; i++) {
|
||||
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
||||
}
|
||||
}
|
||||
|
||||
void DivPlatformLynx::poke(unsigned int addr, unsigned short val) {
|
||||
rWrite(addr,val);
|
||||
}
|
||||
|
||||
void DivPlatformLynx::poke(std::vector<DivRegWrite>& wlist) {
|
||||
for (DivRegWrite& i: wlist) rWrite(i.addr, i.val);
|
||||
}
|
||||
|
||||
int DivPlatformLynx::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
|
||||
parent=p;
|
||||
dumpWrites=false;
|
||||
skipRegisterWrites=false;
|
||||
|
||||
for (int i=0; i<4; i++) {
|
||||
isMuted[i]=false;
|
||||
}
|
||||
|
||||
chipClock = 16000000;
|
||||
rate = chipClock/128;
|
||||
|
||||
mikey = std::make_unique<Lynx::Mikey>(rate);
|
||||
reset();
|
||||
return 4;
|
||||
}
|
||||
|
||||
void DivPlatformLynx::quit() {
|
||||
mikey.reset();
|
||||
}
|
||||
|
||||
DivPlatformLynx::~DivPlatformLynx() {
|
||||
}
|
||||
|
||||
DivPlatformLynx::MikeyFreqDiv::MikeyFreqDiv(int frequency) {
|
||||
|
||||
int clamped=clamp(frequency, 36, 16383);
|
||||
|
||||
auto top=bsr(clamped);
|
||||
|
||||
if (top>7)
|
||||
{
|
||||
clockDivider=top-7;
|
||||
backup=frequency>>(top-7);
|
||||
}
|
||||
else
|
||||
{
|
||||
clockDivider=0;
|
||||
backup=frequency;
|
||||
}
|
||||
}
|
||||
|
||||
DivPlatformLynx::MikeyDuty::MikeyDuty(int duty) {
|
||||
|
||||
//duty:
|
||||
//9: int
|
||||
//8: f11
|
||||
//7: f10
|
||||
//6: f7
|
||||
//5: f5
|
||||
//4: f4
|
||||
//3: f3
|
||||
//2: f2
|
||||
//1: f1
|
||||
//0: f0
|
||||
|
||||
//f7 moved to bit 7 and int moved to bit 5
|
||||
int_feedback7=((duty&0x40)<<1)|((duty&0x200)>>4);
|
||||
//f11 and f10 moved to bits 7 & 6
|
||||
feedback=(duty&0x3f)|((duty&0x180)>>1);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue