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extern u16int pc, curpc, sp;
extern u8int R[8], Fl;
extern int halt, IME, keys;
extern int clock, ppuclock, divclock, timerclock, timerfreq, timer;
extern int rombank, rambank, ramen, battery, ramrom;
extern uchar mem[], *ram;
extern uchar *cart;
extern int mbc, rombanks, rambanks;
extern int scale;
enum {
rB,
rC,
rD,
rE,
rH,
rL,
rHL,
rA
};
enum {
FLAGC = 0x10,
FLAGH = 0x20,
FLAGN = 0x40,
FLAGZ = 0x80,
};
enum {
/* interrupt types */
INTVBLANK = 0,
INTLCDC = 1,
INTTIMER = 2,
INTSIO = 3,
INTIRQ = 4,
/* I/O registers */
DIV = 0xFF04,
TIMA = 0xFF05,
TMA = 0xFF06,
TAC = 0xFF07,
LY = 0xFF44,
LCDC = 0xFF40,
STAT = 0xFF41,
SCY = 0xFF42,
SCX = 0xFF43,
LYC = 0xFF45,
BGP = 0xFF47,
OBP0 = 0xFF48,
OBP1 = 0xFF49,
WY = 0xFF4A,
WX = 0xFF4B,
/* LCDC */
BGDISP = 1,
SPRITEDISP = 2,
SPRITE16 = 4,
BGTILEMAP = 8,
BGTILEDATA = 16,
WINDOWDISP = 32,
WINDOWTILEMAP = 64,
LCDOP = 128,
/* LCD STAT */
MODEHBLANK = 0,
MODEVBLANK = 1,
MODEOAM = 2,
MODELCD = 3,
/* others */
IF = 0xFF0F,
IE = 0xFFFF,
CPUFREQ = 4194304,
MILLION = 1000000,
BILLION = 1000000000,
SAMPLE = 44100,
};
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