INT 15 - Far East MSDOS - GET DOS TYPE AX = 4900h Return: CF clear if successful AH = 00h BL = type of DOS running 00h DOS/V 01h DOS/J or DOS/K (early IBM Japan versions of MSDOS) CF set on error AH = 86h (function not supported) Note: in practice, DOS/J returns AH=86h; AX DOS does not support this call