#define LSHIFT_CODE 0x2A
#define RSHIFT_CODE 0x36
#define NUMLOCK_CODE 0x45
#define SCROLLLOCK_CODE 0x46
#define CAPSLOCK_CODE 0x3A
#define ACKNOWLEDGE_CODE 0xFA
#define EXTENDED0_CODE 0xE0
#define EXTENDED1_CODE 0xE1
#define LALT_CODE 0x38
#define RALT_CODE 0xE038
#define PAUSE_CODE 0x00E11D45
#define LCTRL_CODE 0x1D
#define RCTRL_CODE 0xE01D

#define FLAG_BUFFER_FULL (1 << 0)
#define FLAG_EXTENDED_KEY (1 << 1)
#define FLAG_SCROLLLOCK_PRESSED (1 << 2)
#define FLAG_NUMLOCK_PRESSED (1 << 3)
#define FLAG_CAPSLOCK_PRESSED (1 << 4)
#define FLAG_SCROLLLOCK_ACTIVE (1 << 5)
#define FLAG_NUMLOCK_ACTIVE (1 << 6)
#define FLAG_CAPSLOCK_ACTIVE (1 << 7)
#define FLAG_LSHIFT_PRESSED (1 << 8)
#define FLAG_RSHIFT_PRESSED (1 << 9)
#define FLAG_LALT_PRESSED (1 << 10)
#define FLAG_RALT_PRESSED (1 << 11)
#define FLAG_LCTRL_PRESSED (1 << 12)
#define FLAG_RCTRL_PRESSED (1 << 13)

#define KEY_RELEASE 0x80
#define KEY_CODE 0x7F


void kb_write_keycode();
void kb_read_keycode();