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 */
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 */
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#include <dos.h>
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#include <dos.h>
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#include "video.h" /* include self for control */
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#include "video.h" /* include self for control */
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/* pointers to VGA/MDA screens */
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/* pointer to the VGA/MDA screen */
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static unsigned short far *vga = (unsigned short far *)0xB8000000L;
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static unsigned short far *scr = (unsigned short far *)0xB8000000L;
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static unsigned short far *mda = (unsigned short far *)0xB0000000L;
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void video_clear(unsigned short attr, int offset) {
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void video_clear(unsigned short attr, int offset) {
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  int x;
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  int x;
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  for (x = offset; x < 2000; x++) {
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  for (x = offset; x < 2000; x++) {
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    vga[x] = attr;
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    mda[x] = attr;
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    scr[x] = attr;
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  }
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  }
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}
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}
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/* inits screen, returns 0 for color mode, 1 for mono */
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int video_init(void) {
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  union REGS r;
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  int monoflag;
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  /* get current video mode to detect color (7 = mono, anything else is color) */
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  r.h.ah = 0x0F;
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  int86(0x10, &r, &r);
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  /* set the monoflag to detected value and prepare the next mode we will set */
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  if (r.h.al == 7) {
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    monoflag = 1;
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    r.h.al = 7; /* 80x25 2 colors (MDA / Hercules) */
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    scr = (unsigned short far *)0xB0000000L;
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  } else if (r.h.al == 2) { /* 80x25 grayscale */
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    monoflag = 1;
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    r.h.al = 2; /* 80x25 grayscale */
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    scr = (unsigned short far *)0xB8000000L;
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  } else {
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    monoflag = 0;
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    r.h.al = 3; /* 80x25 16 colors */
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    scr = (unsigned short far *)0xB8000000L;
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  }
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  /* (re)set video mode to be sure what we are dealing with */
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  r.h.ah = 0;
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  int86(0x10, &r, &r);
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  return(monoflag);
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}
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void video_putchar(int y, int x, unsigned short attr, int c) {
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void video_putchar(int y, int x, unsigned short attr, int c) {
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  int offset = (y << 6) + (y << 4) + x;
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  scr[(y << 6) + (y << 4) + x] = attr | c;
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  vga[offset] = attr | c;
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  mda[offset] = attr | c;
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}
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}
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void video_putcharmulti(int y, int x, unsigned short attr, int c, int repeat, int step) {
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void video_putcharmulti(int y, int x, unsigned short attr, int c, int repeat, int step) {
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  int offset = (y << 6) + (y << 4) + x;
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  int offset = (y << 6) + (y << 4) + x;
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  while (repeat-- > 0) {
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  while (repeat-- > 0) {
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    vga[offset] = attr | c;
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    mda[offset] = attr | c;
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    scr[offset] = attr | c;
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    offset += step;
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    offset += step;
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  }
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  }
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}
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}
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void video_putstring(int y, int x, unsigned short attr, char *s) {
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void video_putstring(int y, int x, unsigned short attr, char *s) {
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  x += (y << 6) + (y << 4); /* I use x as an offset now */
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  x += (y << 6) + (y << 4); /* I use x as an offset now */
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  while (*s != 0) {
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  while (*s != 0) {
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    unsigned short b = attr | *s;
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    scr[x++] = attr | *s;
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    vga[x] = b;
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    mda[x] = b;
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    x++;
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    s++;
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    s++;
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  }
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  }
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}
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}
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void video_putstringfix(int y, int x, unsigned short attr, char *s, int w) {
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void video_putstringfix(int y, int x, unsigned short attr, char *s, int w) {
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  x += (y << 6) + (y << 4); /* I use x as an offset now */
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  x += (y << 6) + (y << 4); /* I use x as an offset now */
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  while (w-- > 0) {
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  while (w-- > 0) {
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    unsigned short b;
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    b = attr | *s;
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    scr[x++] = attr | *s;
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    if (*s != 0) s++;
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    if (*s != 0) s++;
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    vga[x] = b;
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    mda[x] = b;
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    x++;
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  }
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  }
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}
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}
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void video_movecursor(int y, int x) {
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void video_movecursor(int y, int x) {
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  union REGS r;
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  union REGS r;