INT 16 - KEYBOARD - CHECK FOR 122-KEY KEYSTROKE (122-key kbd support only) AH = 21h Return: ZF set if no keystroke available ZF clear if keystroke available AH = BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. scan code AL = ASCII character Notes: use AH=09h to determine whether this function is supported some versions of the IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. Technical Reference erroneously report that CF is returned instead of ZF K3PLUS v6.00+ supports this function as an alias of AH=11h SeeAlso: AH=01h,AH=09h,AH=11h,AH=20h,AH=21h