//bios.h Copyright (C) 1989-96 I.Pedley (CTPP) Thu 03-Apr-1997 at 23:28:31

SL  _bios_keybrd(SL flag);
/* keyboard services */

#define _KEYBRD_READ        0   // read next character from keyboard
#define _KEYBRD_READY       1   // check for keystroke
#define _KEYBRD_SHIFTSTATUS 2   // get current shift key status

// services for enhanced keyboards

#define _NKEYBRD_READ           0x10    // read next character from keyboard
#define _NKEYBRD_READY          0x11    // check for keystroke
#define _NKEYBRD_SHIFTSTATUS    0x12    // get current shift key status