OSDev.org

I write my os keyboard handling using BIOS interrupt 0x16 subfunction
0x0.But when I call the get_keystroke function,the machine reboot
immediately,and in VMware this procedure cause a triple fault.This
function post below.
   How can I handle my keyboard with BIOS?
   And is there any interrupt I should use befor I call interrupt 0x16
subfunction 0x0 to initialize the keyboard?
   Can I find some tutorial on Web?
   Any idea?
   Thanks!
/////////////////////////////////////////////
typedef unsigned short word;

word get_keystroke()
{
word _ax;
__asm__ __volatile__ ("movb $0x0,%%ah;
int $0x16;"
:"=a"(_ax));
return _ax;
}
/////////////////////////////////////////////

Don't know how many times it can be said, but... you _cannot_ use the BIOS in protected mode!

Possible solutions are to run the BIOS through a vm86 task, or write a real pmode driver for it (ie, the "normal" way).

A keyboard driver is one of the easiest you'll ever write.  Check out some programming docs on the 'net.  Basically, it involves writting an ISR, and reading ports (0x60, I think... but I don't remember exactly).

Jeff

I forgot to say that I still in Real Mode

> I forgot to say that I still in Real Mode

Ahh, yes... that'd be a useful tidbit to know   I read "triple fault" and assumed pmode (imagine that!

Anyway, if your code is, indeed, read mode, then you shouldn't be using GCC (which cannot produce real mode code).  And how are you booting this OS?

Jeff