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====== Int 21H, AH=3BH ======

===== Version =====

2 and higher

===== Brief =====

"CHDIR" - SET CURRENT DIRECTORY

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

[[en:docs:fapi:DosChDir]]

===== Input =====

  * AH = 3Bh
  * DS:DX -> ASCIZ pathname to become current directory (max 64 bytes)

===== Return =====

  * CF clear if successful
    * AX destroyed
  * CF set on error
    * AX = error code (03h) (see #01680 at AH=59h/BX=0000h)

===== Notes =====

if new directory name includes a drive letter, the default drive is not changed, only the current directory on that drive
          
changing the current directory also changes the directory in which FCB file calls operate
          
===== See also =====

AH=[[en:docs:dos:api:int21:47|47h]],AX=[[en:docs:dos:api:int21:71:3b|713Bh]]

===== Note =====

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

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