ref: 9c40e15ba8ae000f73c23d89143d6c44b75220fd
dir: /sys/src/games/nes/dat.h/
extern u16int pc, curpc;
extern u8int rA, rX, rY, rS, rP;
extern uchar mem[32768];
extern int scale;
extern u16int pput, ppuv;
extern u8int ppusx;
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,
PPUNMI = 1<<7,
BIGSPRITE = 1<<5,
BGTABLE = 1<<4,
SPRTABLE = 1<<3,
VRAMINC = 1<<2,
GRAYSCALE = 1<<0,
BG8DISP = 1<<1,
BG8SPRITE = 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,
MILLION = 1000000,
BILLION = 1000000000,
};
enum {
MHORZ,
MVERT,
MSINGA,
MSINGB,
MFOUR
};