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DOS stdin stdout inline ASM

/ Published in: C
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  1. void putch(char c){
  2.  asm(
  3.   "movb $2,%%ah\n"
  4.   "int $0x21\n"
  5.   :
  6.   :"d"(c)
  7.   :"ah"
  8.  );
  9. }
  10.  
  11. void newline(){
  12.  putch('\r');
  13.  putch('\n');
  14. }
  15.  
  16. void puts(char*s){
  17.  while(*s){
  18.   putch(*s);
  19.   ++s;
  20.  }
  21.  newline();
  22. }
  23.  
  24. char kbhit(){
  25.  char c;
  26.  asm(
  27.   "movb $1,%%ah\n"
  28.   "int $0x16\n"
  29.   "setnzb %0"
  30.   :"=g"(c)
  31.   :
  32.  );
  33.  return c;
  34. }
  35.  
  36. char kbhit2(){
  37.  char c;
  38.  asm(
  39.   "movb $0x0b,%%ah\n"
  40.   "int $0x21\n"
  41.   :"=a"(c)
  42.   :
  43.  );
  44.  return c;
  45. }
  46.  
  47. char getch(){
  48.  char c;
  49.  asm(
  50.   "movb $0,%%ah\n"
  51.   "int $0x16\n"
  52.   :"=a"(c)
  53.   :
  54.  );
  55.  return c;
  56. }

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