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fceux/nsf.c

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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002 Xodnizel
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "types.h"
#include "x6502.h"
#include "fceu.h"
#include "video.h"
#include "sound.h"
#include "nsf.h"
#include "general.h"
#include "memory.h"
#include "file.h"
#include "fds.h"
#include "cart.h"
#include "input.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
static uint8 SongReload;
static int CurrentSong;
static DECLFW(NSF_write);
static DECLFR(NSF_read);
static int vismode=1;
static uint8 NSFROM[0x30+6]=
{
/* 0x00 - NMI */
0x8D,0xF4,0x3F, /* Stop play routine NMIs. */
0xA2,0xFF,0x9A, /* Initialize the stack pointer. */
0xAD,0xF0,0x3F, /* See if we need to init. */
0xF0,0x09, /* If 0, go to play routine playing. */
0xAD,0xF1,0x3F, /* Confirm and load A */
0xAE,0xF3,0x3F, /* Load X with PAL/NTSC byte */
0x20,0x00,0x00, /* JSR to init routine */
0xA9,0x00,
0xAA,
0xA8,
0x20,0x00,0x00, /* JSR to play routine */
0x8D,0xF5,0x3F, /* Start play routine NMIs. */
0x90,0xFE, /* Loopie time. */
/* 0x20 */
0x8D,0xF3,0x3F, /* Init init NMIs */
0x18,
0x90,0xFE /* Loopie time. */
};
static DECLFR(NSFROMRead)
{
return (NSFROM-0x3800)[A];
}
static int doreset=0;
static int NSFNMIFlags;
static uint8 *NSFDATA=0;
static int NSFMaxBank;
static int NSFSize;
static uint8 BSon;
static uint16 PlayAddr;
static uint16 InitAddr;
static uint16 LoadAddr;
static NSF_HEADER NSFHeader;
void NSFMMC5_Close(void);
static uint8 *ExWRAM=0;
void NSFGI(int h)
{
switch(h)
{
case GI_CLOSE:
if(NSFDATA) {free(NSFDATA);NSFDATA=0;}
if(ExWRAM) {free(ExWRAM);ExWRAM=0;}
if(NSFHeader.SoundChip&1) {
// NSFVRC6_Init();
} else if(NSFHeader.SoundChip&2) {
// NSFVRC7_Init();
} else if(NSFHeader.SoundChip&4) {
// FDSSoundReset();
} else if(NSFHeader.SoundChip&8) {
NSFMMC5_Close();
} else if(NSFHeader.SoundChip&0x10) {
// NSFN106_Init();
} else if(NSFHeader.SoundChip&0x20) {
// NSFAY_Init();
}
break;
case GI_RESETM2:
case GI_POWER: NSF_init();break;
}
}
// First 32KB is reserved for sound chip emulation in the iNES mapper code.
static INLINE void BANKSET(uint32 A, uint32 bank)
{
bank&=NSFMaxBank;
if(NSFHeader.SoundChip&4)
memcpy(ExWRAM+(A-0x6000),NSFDATA+(bank<<12),4096);
else
setprg4(A,bank);
}
int NSFLoad(FCEUFILE *fp)
{
int x;
FCEU_fseek(fp,0,SEEK_SET);
FCEU_fread(&NSFHeader,1,0x80,fp);
if(memcmp(NSFHeader.ID,"NESM\x1a",5))
return 0;
NSFHeader.SongName[31]=NSFHeader.Artist[31]=NSFHeader.Copyright[31]=0;
LoadAddr=NSFHeader.LoadAddressLow;
LoadAddr|=NSFHeader.LoadAddressHigh<<8;
if(LoadAddr<0x6000)
{
FCEUD_PrintError("Invalid load address.");
return(0);
}
InitAddr=NSFHeader.InitAddressLow;
InitAddr|=NSFHeader.InitAddressHigh<<8;
PlayAddr=NSFHeader.PlayAddressLow;
PlayAddr|=NSFHeader.PlayAddressHigh<<8;
NSFSize=FCEU_fgetsize(fp)-0x80;
NSFMaxBank=((NSFSize+(LoadAddr&0xfff)+4095)/4096);
NSFMaxBank=uppow2(NSFMaxBank);
if(!(NSFDATA=(uint8 *)FCEU_malloc(NSFMaxBank*4096)))
return 0;
FCEU_fseek(fp,0x80,SEEK_SET);
memset(NSFDATA,0x00,NSFMaxBank*4096);
FCEU_fread(NSFDATA+(LoadAddr&0xfff),1,NSFSize,fp);
NSFMaxBank--;
BSon=0;
for(x=0;x<8;x++)
BSon|=NSFHeader.BankSwitch[x];
FCEUGameInfo->type=GIT_NSF;
FCEUGameInfo->input[0]=FCEUGameInfo->input[1]=SI_GAMEPAD;
FCEUGameInfo->cspecial=SIS_NSF;
for(x=0;;x++)
{
if(NSFROM[x]==0x20)
{
NSFROM[x+1]=InitAddr&0xFF;
NSFROM[x+2]=InitAddr>>8;
NSFROM[x+8]=PlayAddr&0xFF;
NSFROM[x+9]=PlayAddr>>8;
break;
}
}
if(NSFHeader.VideoSystem==0)
FCEUGameInfo->vidsys=GIV_NTSC;
else if(NSFHeader.VideoSystem==1)
FCEUGameInfo->vidsys=GIV_PAL;
GameInterface=NSFGI;
FCEU_printf("NSF Loaded. File information:\n\n");
FCEU_printf(" Name: %s\n Artist: %s\n Copyright: %s\n\n",NSFHeader.SongName,NSFHeader.Artist,NSFHeader.Copyright);
if(NSFHeader.SoundChip)
{
static char *tab[6]={"Konami VRCVI","Konami VRCVII","Nintendo FDS","Nintendo MMC5","Namco 106","Sunsoft FME-07"};
for(x=0;x<6;x++)
if(NSFHeader.SoundChip&(1<<x))
{
FCEU_printf(" Expansion hardware: %s\n",tab[x]);
NSFHeader.SoundChip=1<<x; /* Prevent confusing weirdness if more than one bit is set. */
break;
}
}
if(BSon)
FCEU_printf(" Bank-switched.\n");
FCEU_printf(" Load address: $%04x\n Init address: $%04x\n Play address: $%04x\n",LoadAddr,InitAddr,PlayAddr);
FCEU_printf(" %s\n",(NSFHeader.VideoSystem&1)?"PAL":"NTSC");
FCEU_printf(" Starting song: %d / %d\n\n",NSFHeader.StartingSong,NSFHeader.TotalSongs);
if(NSFHeader.SoundChip&4)
ExWRAM=(uint8*)FCEU_gmalloc(32768+8192); //mbg merge 7/17/06 added cast
else
ExWRAM=(uint8*)FCEU_gmalloc(8192); //mbg merge 7/17/06 added cast
FCEUI_SetVidSystem(NSFHeader.VideoSystem);
return 1;
}
static DECLFR(NSFVectorRead)
{
if(((NSFNMIFlags&1) && SongReload) || (NSFNMIFlags&2) || doreset)
{
if(A==0xFFFA) return(0x00);
else if(A==0xFFFB) return(0x38);
else if(A==0xFFFC) return(0x20);
else if(A==0xFFFD) {doreset=0;return(0x38);}
return(X.DB);
}
else
return(CartBR(A));
}
void NSFVRC6_Init(void);
void NSFVRC7_Init(void);
void NSFMMC5_Init(void);
void NSFN106_Init(void);
void NSFAY_Init(void);
void NSF_init(void)
{
doreset=1;
ResetCartMapping();
if(NSFHeader.SoundChip&4)
{
SetupCartPRGMapping(0,ExWRAM,32768+8192,1);
setprg32(0x6000,0);
setprg8(0xE000,4);
memset(ExWRAM,0x00,32768+8192);
SetWriteHandler(0x6000,0xDFFF,CartBW);
SetReadHandler(0x6000,0xFFFF,CartBR);
}
else
{
memset(ExWRAM,0x00,8192);
SetReadHandler(0x6000,0x7FFF,CartBR);
SetWriteHandler(0x6000,0x7FFF,CartBW);
SetupCartPRGMapping(0,NSFDATA,((NSFMaxBank+1)*4096),0);
SetupCartPRGMapping(1,ExWRAM,8192,1);
setprg8r(1,0x6000,0);
SetReadHandler(0x8000,0xFFFF,CartBR);
}
if(BSon)
{
int32 x;
for(x=0;x<8;x++)
{
if(NSFHeader.SoundChip&4 && x>=6)
BANKSET(0x6000+(x-6)*4096,NSFHeader.BankSwitch[x]);
BANKSET(0x8000+x*4096,NSFHeader.BankSwitch[x]);
}
}
else
{
int32 x;
for(x=(LoadAddr&0xF000);x<0x10000;x+=0x1000)
BANKSET(x,((x-(LoadAddr&0x7000))>>12));
}
SetReadHandler(0xFFFA,0xFFFD,NSFVectorRead);
SetWriteHandler(0x2000,0x3fff,0);
SetReadHandler(0x2000,0x37ff,0);
SetReadHandler(0x3836,0x3FFF,0);
SetReadHandler(0x3800,0x3835,NSFROMRead);
SetWriteHandler(0x5ff6,0x5fff,NSF_write);
SetWriteHandler(0x3ff0,0x3fff,NSF_write);
SetReadHandler(0x3ff0,0x3fff,NSF_read);
if(NSFHeader.SoundChip&1) {
NSFVRC6_Init();
} else if(NSFHeader.SoundChip&2) {
NSFVRC7_Init();
} else if(NSFHeader.SoundChip&4) {
FDSSoundReset();
} else if(NSFHeader.SoundChip&8) {
NSFMMC5_Init();
} else if(NSFHeader.SoundChip&0x10) {
NSFN106_Init();
} else if(NSFHeader.SoundChip&0x20) {
NSFAY_Init();
}
CurrentSong=NSFHeader.StartingSong;
SongReload=0xFF;
NSFNMIFlags=0;
}
static DECLFW(NSF_write)
{
switch(A)
{
case 0x3FF3:NSFNMIFlags|=1;break;
case 0x3FF4:NSFNMIFlags&=~2;break;
case 0x3FF5:NSFNMIFlags|=2;break;
case 0x5FF6:
case 0x5FF7:if(!(NSFHeader.SoundChip&4)) return;
case 0x5FF8:
case 0x5FF9:
case 0x5FFA:
case 0x5FFB:
case 0x5FFC:
case 0x5FFD:
case 0x5FFE:
case 0x5FFF:if(!BSon) return;
A&=0xF;
BANKSET((A*4096),V);
break;
}
}
static DECLFR(NSF_read)
{
int x;
switch(A)
{
case 0x3ff0:x=SongReload;
if(!fceuindbg)
SongReload=0;
return x;
case 0x3ff1:
if(!fceuindbg)
{
memset(RAM,0x00,0x800);
BWrite[0x4015](0x4015,0x0);
for(x=0;x<0x14;x++)
BWrite[0x4000+x](0x4000+x,0);
BWrite[0x4015](0x4015,0xF);
if(NSFHeader.SoundChip&4)
{
BWrite[0x4017](0x4017,0xC0); /* FDS BIOS writes $C0 */
BWrite[0x4089](0x4089,0x80);
BWrite[0x408A](0x408A,0xE8);
}
else
{
memset(ExWRAM,0x00,8192);
BWrite[0x4017](0x4017,0xC0);
BWrite[0x4017](0x4017,0xC0);
BWrite[0x4017](0x4017,0x40);
}
if(BSon)
{
for(x=0;x<8;x++)
BANKSET(0x8000+x*4096,NSFHeader.BankSwitch[x]);
}
return (CurrentSong-1);
}
case 0x3FF3:return PAL;
}
return 0;
}
uint8 FCEU_GetJoyJoy(void);
static int special=0;
void DrawNSF(uint8 *XBuf)
{
char snbuf[16];
int x;
if(vismode==0) return;
memset(XBuf,0,256*240);
{
int32 *Bufpl;
int32 mul=0;
int l;
l=GetSoundBuffer(&Bufpl);
if(special==0)
{
if(FSettings.SoundVolume)
mul=8192*240/(16384*FSettings.SoundVolume/50);
for(x=0;x<256;x++)
{
uint32 y;
y=142+((Bufpl[(x*l)>>8]*mul)>>14);
if(y<240)
XBuf[x+y*256]=3;
}
}
else if(special==1)
{
if(FSettings.SoundVolume)
mul=8192*240/(8192*FSettings.SoundVolume/50);
for(x=0;x<256;x++)
{
double r;
uint32 xp,yp;
r=(Bufpl[(x*l)>>8]*mul)>>14;
xp=128+r*cos(x*M_PI*2/256);
yp=120+r*sin(x*M_PI*2/256);
xp&=255;
yp%=240;
XBuf[xp+yp*256]=3;
}
}
else if(special==2)
{
static double theta=0;
if(FSettings.SoundVolume)
mul=8192*240/(16384*FSettings.SoundVolume/50);
for(x=0;x<128;x++)
{
double xc,yc;
double r,t;
uint32 m,n;
xc=(double)128-x;
yc=0-((double)( ((Bufpl[(x*l)>>8]) *mul)>>14));
t=M_PI+atan(yc/xc);
r=sqrt(xc*xc+yc*yc);
t+=theta;
m=128+r*cos(t);
n=120+r*sin(t);
if(m<256 && n<240)
XBuf[m+n*256]=3;
}
for(x=128;x<256;x++)
{
double xc,yc;
double r,t;
uint32 m,n;
xc=(double)x-128;
yc=(double)((Bufpl[(x*l)>>8]*mul)>>14);
t=atan(yc/xc);
r=sqrt(xc*xc+yc*yc);
t+=theta;
m=128+r*cos(t);
n=120+r*sin(t);
if(m<256 && n<240)
XBuf[m+n*256]=3;
}
theta+=(double)M_PI/256;
}
}
DrawTextTrans(XBuf+10*256+4+(((31-strlen((char*)NSFHeader.SongName))<<2)), 256, NSFHeader.SongName, 6);
DrawTextTrans(XBuf+26*256+4+(((31-strlen((char*)NSFHeader.Artist))<<2)), 256,NSFHeader.Artist, 6);
DrawTextTrans(XBuf+42*256+4+(((31-strlen((char*)NSFHeader.Copyright))<<2)), 256,NSFHeader.Copyright, 6);
DrawTextTrans(XBuf+70*256+4+(((31-strlen("Song:"))<<2)), 256, (uint8*)"Song:", 6);
sprintf(snbuf,"<%d/%d>",CurrentSong,NSFHeader.TotalSongs);
DrawTextTrans(XBuf+82*256+4+(((31-strlen(snbuf))<<2)), 256, (uint8*)snbuf, 6);
{
static uint8 last=0;
uint8 tmp;
tmp=FCEU_GetJoyJoy();
if((tmp&JOY_RIGHT) && !(last&JOY_RIGHT))
{
if(CurrentSong<NSFHeader.TotalSongs)
{
CurrentSong++;
SongReload=0xFF;
}
}
else if((tmp&JOY_LEFT) && !(last&JOY_LEFT))
{
if(CurrentSong>1)
{
CurrentSong--;
SongReload=0xFF;
}
}
else if((tmp&JOY_UP) && !(last&JOY_UP))
{
CurrentSong+=10;
if(CurrentSong>NSFHeader.TotalSongs) CurrentSong=NSFHeader.TotalSongs;
SongReload=0xFF;
}
else if((tmp&JOY_DOWN) && !(last&JOY_DOWN))
{
CurrentSong-=10;
if(CurrentSong<1) CurrentSong=1;
SongReload=0xFF;
}
else if((tmp&JOY_START) && !(last&JOY_START))
SongReload=0xFF;
else if((tmp&JOY_A) && !(last&JOY_A))
{
special=(special+1)%3;
}
last=tmp;
}
}
void DoNSFFrame(void)
{
if(((NSFNMIFlags&1) && SongReload) || (NSFNMIFlags&2))
TriggerNMI();
}
void FCEUI_NSFSetVis(int mode)
{
vismode=mode;
}
int FCEUI_NSFChange(int amount)
{
CurrentSong+=amount;
if(CurrentSong<1) CurrentSong=1;
else if(CurrentSong>NSFHeader.TotalSongs) CurrentSong=NSFHeader.TotalSongs;
SongReload=0xFF;
return(CurrentSong);
}
/* Returns total songs */
int FCEUI_NSFGetInfo(uint8 *name, uint8 *artist, uint8 *copyright, int maxlen)
{
strncpy((char*)name,(char*)NSFHeader.SongName,maxlen); //mbg merge 7/17/06 added casts
strncpy((char*)artist,(char*)NSFHeader.Artist,maxlen); //mbg merge 7/17/06 added casts
strncpy((char*)copyright,(char*)NSFHeader.Copyright,maxlen); //mbg merge 7/17/06 added casts
return(NSFHeader.TotalSongs);
}
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