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====== Int 21H, AH=5FH, AL=08H ======

===== Version =====

5 and higher

===== Brief =====

DISABLE DRIVE

===== Family API =====


===== Input =====

    AX = 5F08h
    DL = drive number (0=A:)

===== Return =====

  CF clear if successful
  CF set on error
  AX = error code (0Fh) (see #01680 at AH=59h/BX=0000h)

===== Macro =====


===== Notes =====

Simply clears the "valid" bit in the drive's CDS. This function is not supported by Novell DOS 7 through at least Update 4, but support was added by Update 13

===== See also =====

AH=[[en:docs:dos:api:int21:52|52h]] - AX=[[en:docs:dos:api:int21:5f:07|5F07h]]
  
===== Note =====

Text based on [[http://www.cs.cmu.edu/~ralf/files.html|Ralf Brown Interrupt List Release 61]]

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