u16 ax = 0x0200;
u16 cx, dx;
- asm("int $0x1a"
- : "+a" (ax), "=c" (cx), "=d" (dx)
- : : "ebx", "esi", "edi");
+ asm volatile("int $0x1a"
+ : "+a" (ax), "=c" (cx), "=d" (dx)
+ : : "ebx", "esi", "edi");
return dx >> 8;
}
int getchar(void)
{
u16 ax = 0;
- asm("int $0x16" : "+a" (ax));
+ asm volatile("int $0x16" : "+a" (ax));
return ax & 0xff;
}
static int kbd_pending(void)
{
u8 pending;
- asm("int $0x16; setnz %0"
- : "=rm" (pending)
- : "a" (0x0100));
+ asm volatile("int $0x16; setnz %0"
+ : "=rm" (pending)
+ : "a" (0x0100));
return pending;
}