Int 2F Fn 4A10  - Smartdrv V4.00+ - Get Double-buffer Status               [c]

   AX = 4A10h
   BX = 0005h
   BP = drive number (0=A, 1=B...)

Return: AX = BABEh if double-buffered
       ES:DI -> 16-byte array of status bytes for fixed disks (see #2488)

See Also: AX=4A10h/BX=0000h,AX=4A10h/BX=0003h,AX=4A10h/BX=0006h

(Table 2488)
Values for SMARTDRV status byte:
 00h   state unknown
 FFh   drive double-buffered
 else  not double-buffered