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extern u16int pc, curpc;
extern u8int rA, rX, rY, rS, rP;
extern u8int irq, nmi;
extern uchar mem[32768], ppuram[16384], oam[256];
extern u16int pput, ppuv;
extern u8int ppusx, vrambuf;
extern int mirr, ppux, ppuy, odd, vramlatch, keylatch, keylatch2;
extern int map, mmc3hack, oflag;
extern uchar *prg, *chr;
extern int nprg, nchr, map, chrram;
extern u8int apuseq, apuctr[13];
extern u16int dmcaddr, dmccnt;
extern int clock, ppuclock, apuclock, dmcclock, dmcfreq, saveclock;
extern void (*mapper[])(int, u8int);
enum {
FLAGC = 1<<0,
FLAGZ = 1<<1,
FLAGI = 1<<2,
FLAGD = 1<<3,
FLAGB = 1<<4,
FLAGV = 1<<6,
FLAGN = 1<<7
};
enum {
PPUCTRL = 0x2000,
PPUMASK = 0x2001,
PPUSTATUS = 0x2002,
PPUSCROLL = 0x2005,
DMCCTRL = 0x4010,
DMCBUF = 0x4011,
DMCADDR = 0x4012,
DMCLEN = 0x4013,
APUSTATUS = 0x4015,
APUFRAME = 0x4017,
PPUNMI = 1<<7,
BIGSPRITE = 1<<5,
BGTABLE = 1<<4,
SPRTABLE = 1<<3,
VRAMINC = 1<<2,
GRAYSCALE = 1<<0,
BG8DISP = 1<<1,
SPRITE8DISP = 1<<2,
BGDISP = 1<<3,
SPRITEDISP = 1<<4,
PPUVBLANK = 1<<7,
SPRITE0HIT = 1<<6,
};
enum {
HPRG = 4,
HCHR = 5,
HRAM = 8,
HROMH = 9,
FLMIRROR = 1<<0,
FLBAT = 1<<1,
FLTRAINER = 1<<2,
FLFOUR = 1<<3,
FLMAPPERL = 4,
FLMAPPERH = 12,
FLNES20M = 3<<10,
FLNES20V = 2<<10,
FLPC10 = 1<<9,
FLVS = 1<<8,
PRGSZ = 1<<14,
CHRSZ = 1<<13,
};
enum {
FREQ = 21477272,
APUDIV = 89490,
RATE = 44100,
SAMPDIV = FREQ / RATE,
SAVEFREQ = FREQ/5,
};
enum {
MHORZ,
MVERT,
MSINGA,
MSINGB,
MFOUR
};
enum {
INIT = -1,
SAVE = -2,
RSTR = -3,
SCAN = -4,
};
enum {
IRQFRAME = 1,
IRQDMC = 2,
IRQMMC = 4,
};
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