Note: This API call is for DOS personality only. Use Family API for portability.
Int 21H, AH=5BH
3 and higher
CREATE NEW FILE
AH = 5Bh CX = file attribute (see #01420 at AX=4301h) DS:DX -> ASCIZ filename
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)
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
Text based on Ralf Brown Interrupt List Release 61