#ifndef _HAL_H
#define _HAL_H

#include <stdint.h>
#include <time.h>
#define far
#define near

#define i86_start_interrupts() __asm__ __volatile__ ("sti");
#define i86_clear_interrupts() __asm__ __volatile__ ("cli");

extern volatile TIME _internal_clock;

// initialize hardware abstraction layer
extern void i86_hal_initialize ();

// shutdown hardware abstraction layer
extern int  i86_hal_shutdown ();

//! notifies hal interrupt is done
//extern void  interruptdone (unsigned int intno);

//! output sound to speaker
extern void sound (unsigned frequency);

//! read byte from device using port mapped io
//extern unsigned char  inportb (unsigned short _port);

//! write byte to device through port mapped io
//extern void  outportb (unsigned short _port, unsigned char _data);

//! sets new interrupt vector
//extern void  setvect (int intno, void ( far &vect) ( ) );

//! returns current interrupt vector
//extern void ( far *  getvect (int intno)) ( );

//! returns cpu vender
extern const char*  get_cpu_vender ();

extern void reboot();


/**********************************************************************
 *                  KEYBOARD STUFF                                    *
 **********************************************************************/
#define KB_KEY_LSHIFT 0x81    // 1000 0001
#define KB_KEY_RSHIFT 0X82    // 1000 0010
#define KB_KEY_LALT   0X84    // 1000 0100
#define KB_KEY_RALT   0x88    // 1000 1000
#define KB_KEY_LCTRL  0x90    // 1001 0000
#define KB_KEY_RCTRL  0xA0    // 1010 0000
#define KB_KEY_FSHIFT 0xC0    // 1100 0000
extern volatile byte kb_modifier_status;

#define KB_PREFIX_GRAY   0x01       // Gray
#define KB_PREFIX_BREAK  0x02       // Break code
#define KB_PREFIX_PAUSE  0x04       // Pause/break key
#define KB_PREFIX_PAUSE1 0x08       // Recieved first byte from pause/break
extern volatile byte kb_prefix;

#define KB_KEY_SCROLL  0xF1   // 1111 0001
#define KB_KEY_NUM     0xF2   // 1111 0010
#define KB_KEY_CAPS    0xF4   // 1111 0100
extern volatile byte kb_lights_status;

extern byte kb_scancode_set;
#define KB_KEY_PAUSE                0x00
#define KB_KEY_F9                   0x01
#define KB_KEY_F7                   0x02
#define KB_KEY_F5                   0X03
#define KB_KEY_F3                   0x04
#define KB_KEY_F1                   0x05
#define KB_KEY_F2                   0x06
#define KB_KEY_F12                  0x07
#define KB_KEY_PRINTSCRN            0x08
#define KB_KEY_F10                  0x09
#define KB_KEY_F8                   0x0A
#define KB_KEY_F6                   0x0B
#define KB_KEY_F4                   0x0C
#define KB_KEY_TAB                  0x0D
#define KB_KEY_TILDA                0x0E
#define KB_KEY_Q                    0x15
#define KB_KEY_1                    0x16
#define KB_KEY_Z                    0x1A
#define KB_KEY_S                    0x1B
#define KB_KEY_A                    0x1C
#define KB_KEY_W                    0x1D
#define KB_KEY_2                    0x1E
#define KB_KEY_LWIN                 0x1F
#define KB_KEY_C                    0x21
#define KB_KEY_X                    0x22
#define KB_KEY_D                    0x23
#define KB_KEY_E                    0x24
#define KB_KEY_4                    0x25
#define KB_KEY_3                    0x26
#define KB_KEY_RWIN                 0x27
#define KB_KEY_SPACE                0x29
#define KB_KEY_V                    0x2A
#define KB_KEY_F                    0x2B
#define KB_KEY_T                    0x2C
#define KB_KEY_R                    0x2D
#define KB_KEY_5                    0x2E
#define KB_KEY_MENU                 0x2F
#define KB_KEY_N                    0x31
#define KB_KEY_B                    0x32
#define KB_KEY_H                    0x33
#define KB_KEY_G                    0x34
#define KB_KEY_Y                    0x35
#define KB_KEY_6                    0x36
#define KB_KEY_M                    0x3A
#define KB_KEY_J                    0x3B
#define KB_KEY_U                    0x3C
#define KB_KEY_7                    0x3D
#define KB_KEY_8                    0x3E
#define KB_KEY_COMMA                0x41
#define KB_KEY_K                    0x42
#define KB_KEY_I                    0x43
#define KB_KEY_O                    0x44
#define KB_KEY_0                    0x45
#define KB_KEY_9                    0x46
#define KB_KEY_PERIOD               0x49
#define KB_KEY_SLASH                0x4A
#define KB_KEY_L                    0x4B
#define KB_KEY_SEMICOLON            0x4C
#define KB_KEY_P                    0x4D
#define KB_KEY_DASH                 0x4E
#define KB_KEY_APOSTROPHE           0x52
#define KB_KEY_LBRACKET             0x54
#define KB_KEY_EQUAL                0x55
#define KB_KEY_NUMPAD_ENTER         0x59
#define KB_KEY_ENTER                0x5A
#define KB_KEY_RBRACKET             0x5B
#define KB_KEY_BACKSLASH            0x5D
#define KB_KEY_END                  0x5E
#define KB_KEY_LEFT                 0x5F
#define KB_KEY_HOME                 0x60
#define KB_KEY_INSERT               0x61
#define KB_KEY_DELETE               0x62
#define KB_KEY_DOWN                 0x63
#define KB_KEY_RIGHT                0x64
#define KB_KEY_UP                   0x65
#define KB_KEY_BACKSPACE            0x66
#define KB_KEY_PGDOWN               0x67
#define KB_KEY_PGUP                 0x68
#define KB_KEY_NUMPAD_1             0x69
#define KB_KEY_NUMPAD_SLASH         0x6A
#define KB_KEY_NUMPAD_4             0x6B
#define KB_KEY_NUMPAD_7             0x6C
#define KB_KEY_NUMPAD_0             0x70
#define KB_KEY_NUMPAD_COLON         0x71
#define KB_KEY_NUMPAD_2             0x72
#define KB_KEY_NUMPAD_5             0x73
#define KB_KEY_NUMPAD_6             0x74
#define KB_KEY_NUMPAD_8             0x75
#define KB_KEY_ESC                  0x76
#define KB_KEY_F11                  0x78
#define KB_KEY_NUMPAD_PLUS          0x79
#define KB_KEY_NUMPAD_3             0x7A
#define KB_KEY_NUMPAD_MINUS         0x7B
#define KB_KEY_NUMPAD_ASTERISK      0x7C
#define KB_KEY_NUMPAD_9             0x7D

      
typedef struct {
      byte status;
      byte lights;
      byte scancode;
      byte character;
} kb_key;


extern char getch();
extern kb_key getkey();
extern char scancode_to_ascii(byte scancode, byte status);
extern byte get_key_status(byte scancode);
extern void kb_set_repeat(float rate, int delay);
extern void kb_set_LEDs(byte status);

#endif