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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
Category: DOS Kernel - Int 21h - D
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