en:docs:dos:api:int21:3b

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision		Previous revision
en:docs:dos:api:int21:3b [2021/03/24 02:02] – created prokusheven:docs:dos:api:int21:3b [2025/07/20 05:43] (current) – prokushev
Line 1: Line 1:
 {{page>en:templates:dosint}} {{page>en:templates:dosint}}
  
-====== Int 21H, AH=3AH ======+====== Int 21H, AH=3BH ======
  
 ===== Version ===== ===== Version =====
Line 13: Line 13:
 ===== Family API ===== ===== Family API =====
  
 +[[en:docs:fapi:DosChDir]]
  
 ===== Input ===== ===== Input =====
  
-        AH = 3Bh +  * AH = 3Bh 
-        DS:DX -> ASCIZ pathname to become current directory (max 64 bytes)+  * DS:DX -> ASCIZ pathname to become current directory (max 64 bytes)
  
 ===== Return ===== ===== Return =====
  
- CF clear if successful +  * CF clear if successful 
-            AX destroyed +    * AX destroyed 
-        CF set on error +  * CF set on error 
-            AX = error code (03h) (see #01680 at AH=59h/BX=0000h)+    * AX = error code (03h) (see #01680 at AH=59h/BX=0000h)
  
 ===== Notes ===== ===== Notes =====
  
-  if new directory name includes a drive letter, the default drive is +if new directory name includes a drive letter, the default drive is not changed, only the current directory on that drive 
-          not changed, only the current directory on that drive +           
-        changing the current directory also changes the directory in which +changing the current directory also changes the directory in which FCB file calls operate
-          FCB file calls operate +
-        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX+
                      
 ===== See also ===== ===== See also =====
  
- AH=47h,AX=713Bh,INT 2F/AX=1105h+AH=[[en:docs:dos:api:int21:47|47h]],AX=[[en:docs:dos:api:int21:71:3b|713Bh]]
  
 ===== Note ===== ===== Note =====