ref: 5b81e7de3f1ab3691438878cf1da912a54138d5f
dir: /sys/src/games/md/dat.h/
extern u32int curpc, irq;
extern u8int reg[32];
extern u8int dma;
extern u8int z80bus, z80irq;
extern u16int spc, scurpc;
extern u16int ram[32768];
extern u16int *prg;
extern int nprg;
extern u8int *sram;
extern u32int sramctl, sram0, sram1;
extern int savefd, saveclock;
extern u16int vram[32768], vsram[40];
extern u32int cramc[64];
extern u16int vdpstat;
extern int vdpx, vdpy, frame, intla;
extern u8int ym[512], ymstat;
enum {
MODE1 = 0x00,
MODE2 = 0x01,
PANT = 0x02,
PWNT = 0x03,
PBNT = 0x04,
SPRTAB = 0x05,
BGCOL = 0x07,
HORCTR = 0x0a,
MODE3 = 0x0b,
MODE4 = 0x0c,
HORSCR = 0x0d,
AUTOINC = 0x0f,
PLSIZ = 0x10,
WINH = 0x11,
WINV = 0x12,
DMACL = 0x13,
DMACH = 0x14,
DMASRC0 = 0x15,
DMASRC1 = 0x16,
DMASRC2 = 0x17,
IE0 = 0x20,
IE1 = 0x10,
DMAEN = 0x10,
SHI = 0x08,
WIDE = 0x01,
STATDMA = 0x02,
STATHBL = 0x04,
STATVBL = 0x08,
STATFR = 0x10,
STATCOLL= 0x20,
STATOVR = 0x40,
STATINT = 0x80,
};
enum {
BUSREQ = 1,
BUSACK = 2,
RESET = 4,
INTVBL = 1,
INTHOR = 2,
};
enum {
FREQ = 53203400,
YMDIV = 7 * 6,
CPUDIV = 7,
Z80DIV = 15,
RATE = 44100,
SAMPDIV = FREQ / RATE,
SAVEFREQ = FREQ / 4,
};
enum {
SRAM = 0x01,
BATTERY = 0x02,
ADDRMASK = 0x0c,
ADDRBOTH = 0x00,
ADDREVEN = 0x08,
ADDRODD = 0x0c,
SRAMEN = 0x10,
};