en:docs:dos:api:int21:5b

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en:docs:dos:api:int21:5b [2021/08/01 07:34] – created prokusheven:docs:dos:api:int21:5b [2024/05/03 06:49] (current) – prokushev
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 ===== Notes ===== ===== Notes =====
  
- unlike AH=3Ch, this function will fail if the specified file exists +unlike AH=3Ch, this function will fail if the specified file exists rather than truncating it; this permits its use in creating semaphore files because it is an atomic "test and set" operation 
-   rather than truncating it; this permits its use in creating semaphore + 
-   files because it is an atomic "test and set" operation +under the FlashTek X-32 DOS extender, the filename pointer is in DS:EDX
- under the FlashTek X-32 DOS extender, the filename pointer is in DS:EDX+
  
                      
 ===== See also ===== ===== See also =====
  
-  AH=3Ch,AH=5Ah+AH=[[en:docs:dos:api:int21:3c|3Ch]],AH=[[en:docs:dos:api:int21:5a|5Ah]]
  
 ===== Note ===== ===== Note =====