Int 2F Fn 4A10 - Smartdrv V4.00+ - Get Double-buffer Status [c] AX = 4A10h BX = 0005h BP = drive # (0=A, 1=B...) Return: AX = BABEh if double-buffered ES:DI -> ??? See Also: AX=4A10h/BX=0000h,AX=4A10h/BX=0003h,AX=4A10h/BX=0006h