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#ifndef _DOS_H_

#define _DOS_H_

union REGS {

  struct {

    unsigned long ax;

    unsigned long bx;

    unsigned long cx;

    unsigned long dx;

    unsigned long si;

    unsigned long di;

    unsigned long cflag;

    unsigned long flags;

  } x;

  struct {

    unsigned char al;

    unsigned char ah;

    unsigned short upper_ax;

    unsigned char bl;

    unsigned char bh;

    unsigned short upper_bx;

    unsigned char cl;

    unsigned char ch;

    unsigned short upper_cx;

    unsigned char dl;

    unsigned char dh;

    unsigned short upper_dx;

  } h;

};

struct SREGS {

  unsigned short cs;

  unsigned short ds;

  unsigned short es;

  unsigned short fs;

  unsigned short gs;

  unsigned short ss;

};

#ifdef __cplusplus

extern "C" {

#endif

int bdos(int func, unsigned dx, unsigned al);

int bdosptr(int func, void *dx, unsigned al);

int int86(int ivec, union REGS *in, union REGS *out);

int int86x(int ivec, union REGS *in, union REGS *out, struct SREGS *seg);

int intdos(union REGS *in, union REGS *out);

int intdosx(union REGS *in, union REGS *out, struct SREGS *seg);

#ifdef __cplusplus

}

#endif

#endif