DJGPP Keyboard handler.

Hi. I wrote a keyboard handler in c. Sometimes it works sometimes it doesnt.

It works when i do this..

Code:

---

#include "key.h"

int main(void)
{
        KeyboardInstall();

        while(bKeys[KEY_ESC] == false)
        {
                gfxVSync();
        }

        KeyboardRemove();
        return(0);
}

---

But just doesnt respond when i do this...

Code:

---

#include "key.h"

int main(void)
{
        KeyboardInstall();

        while(bKeys[KEY_ESC] == false)
        {
        }

        KeyboardRemove();
        return(0);
}

---

Heres the file key.c...

Code:

---

#include <dpmi.h>
#include <go32.h>
#include <pc.h>
#include "key.h"

bool        bKeys[128];

_go32_dpmi_seginfo        SegInfoKeyboardNew;
_go32_dpmi_seginfo        SegInfoKeyboardOld;

void KeyboardInstall(void)
{
        _go32_dpmi_get_protected_mode_interrupt_vector(0x09, &SegInfoKeyboardOld);

        SegInfoKeyboardNew.pm_offset        = (unsigned long)KeyboardInterrupt;
        SegInfoKeyboardNew.pm_selector        = _go32_my_cs();
        _go32_dpmi_allocate_iret_wrapper(&SegInfoKeyboardNew);
        _go32_dpmi_set_protected_mode_interrupt_vector(0x09, &SegInfoKeyboardNew);

        for(uint i = 0; i < (sizeof(bKeys) / sizeof(bool)); i++)
        {
                bKeys[i] = false;
        }
}

void KeyboardInterrupt(void)
{
        unsigned char        key;

        key = inportb(0x60);

        if(key & 0x80)        bKeys[key - 0x7f]        = false;
        else                bKeys[key]                = true;

        key = inportb(0x61);
        outportb(0x61, key | 0x80);
        outportb(0x61, key);
        outportb(0x20, 0x20);
}

void KeyboardRemove(void)
{
        _go32_dpmi_set_protected_mode_interrupt_vector(0x09, &SegInfoKeyboardOld);
}

void gfxVSync(void)
{
        while(inp(0x3da) & 0x8)
        {
        }

        while(!(inp(0x3da) & 0x8))
        {
        }
}

---

And heres key.h...

Code:

---

#ifndef _KEY_H
#define _KEY_H

#define KEY_ESC                0x01

typedef unsigned int        uint;
typedef uint                bool;
enum {false, true};

extern bool        bKeys[128];

void        KeyboardInstall(void);
void        KeyboardInterrupt(void);
void        KeyboardRemove(void);
void        gfxVSync(void);

#endif /* _KEY_H */

---

Ive also attached the files in a zip file. Please if you have any idea why it behaves this way, please tell me.

Only 10 people saw this, so im bringing it back up.