INT 4A - TI Professional PCIBM PC - KEYBOARD - GET KEYBOARD MODE AH = 02h Return: AL = shift states (see #03213) SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h,INT 16/AH=02h Bitfields for TI Professional PCIBM PC keyboard shift states: Bit(s) Description (Table 03213) 0 Ctrl key pressed 1 Alt key pressed 2 either Shift key pressed 3-6 0 7 CapsLock is ON