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

Note: This API call is for DOS personality only. Use Family API for portability.

2018/09/07 07:04 · prokushev

Int 21H, AH=5BH

Version

3 and higher

Brief

CREATE NEW FILE

Family API

Input

	AH = 5Bh
CX = file attribute (see #01420 at AX=4301h)
DS:DX -> ASCIZ filename

Return

CF clear if successful
    AX = file handle opened for read/write in compatibility mode
CF set on error
    AX = error code (03h,04h,05h,50h) (see #01680)

Notes

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
under the FlashTek X-32 DOS extender, the filename pointer is in DS:EDX

See also

AH=3Ch,AH=5Ah

Note


en/docs/dos/api/int21/5b.txt · Last modified: 2021/08/01 09:34 by prokushev