INT 15 - Tandy??? - ??? AH = E4h AL = subfunction 21h, 89h, 8Ah, 8Bh called by 386MAX v6.01 DL = ??? Return: DL = 00h if successful??? Note: the section of code in 386MAX which calls these functions also checks whether the ROM BIOS has both Tandy and Phoenix Technologies signatures if these calls fail; the Tandy 1000SL/TL BIOS does not support this function, however, returning the usual CF set/AH=86h for "unsupported function".