Int 21/AH=5Bh

DOS 3.0+ - CREATE NEW FILE

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

Category: DOS Kernel - Int 21h - D

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