X-Hacker.org- Interrupts & Ports

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        Get default drive parameter block (INT 21h, 1Fh - internal)

        Entry:
          AH = 1Fh
        Return:
          AL = 00h No Error
               FFh Error
          DS:BX = pointer to DOS Drive Parameter Block (DDPB)

      Note: This just invokes function 32h with DL = 0.
            DOS 4.x returns a different block

See Also: INT 21h, 32h DDPB

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