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#define NULL 0

typedef unsigned int size_t;

struct screen_info {

        unsigned char  orig_x;                  /* 0x00 */

        unsigned char  orig_y;                  /* 0x01 */

        unsigned short dontuse1;                /* 0x02 -- EXT_MEM_K sits here */

        unsigned short orig_video_page;         /* 0x04 */

        unsigned char  orig_video_mode;         /* 0x06 */

        unsigned char  orig_video_cols;         /* 0x07 */

        unsigned short unused2;                 /* 0x08 */

        unsigned short orig_video_ega_bx;       /* 0x0a */

        unsigned short unused3;                 /* 0x0c */

        unsigned char  orig_video_lines;        /* 0x0e */

        unsigned char  orig_video_isVGA;        /* 0x0f */

        unsigned short orig_video_points;       /* 0x10 */

        /* VESA graphic mode -- linear frame buffer */

        unsigned short lfb_width;               /* 0x12 */

        unsigned short lfb_height;              /* 0x14 */

        unsigned short lfb_depth;               /* 0x16 */

        unsigned long  lfb_base;                /* 0x18 */

        unsigned long  lfb_size;                /* 0x1c */

        unsigned short dontuse2, dontuse3;      /* 0x20 -- CL_MAGIC and CL_OFFSET here */

        unsigned short lfb_linelength;          /* 0x24 */

        unsigned char  red_size;                /* 0x26 */

        unsigned char  red_pos;                 /* 0x27 */

        unsigned char  green_size;              /* 0x28 */

        unsigned char  green_pos;               /* 0x29 */

        unsigned char  blue_size;               /* 0x2a */

        unsigned char  blue_pos;                /* 0x2b */

        unsigned char  rsvd_size;               /* 0x2c */

        unsigned char  rsvd_pos;                /* 0x2d */

        unsigned short vesapm_seg;              /* 0x2e */

        unsigned short vesapm_off;              /* 0x30 */

        unsigned short pages;                   /* 0x32 */

                                                /* 0x34 -- 0x3f reserved for future expansion */

};