INT 21 - DOS 3.0+ - CREATE TEMPORARY FILE                                       
	AH = 5Ah
	CX = file attribute (see #01420 at AX=4301h)
	DS:DX -> ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. path ending with a '\' + 13 zero bytes to receive the
		generated filename
Return: CF clear if successful
	    AX = file handle opened for read/write in compatibility mode
	    DS:DX pathname extended with generated name for temporary file
	CF set on error
	    AX = error code (03h,04h,05h) (see #01680)
Desc:	creates a file with a unique name which must be explicitly deleted
Notes:	under the FlashTek X-32 DOS extender, the path pointer is in DS:EDX
	MS-DOS 3.0-4.0 and DR DOS 3.4-5.0 generate the filename as a sequence
	  of hex digits based on the current date and time; MS-DOS 6+,
	  DR DOS 6, and Novell DOS 7 use letters A-P in place of hex digits
	MS-DOS 5.0 and DR DOS 3.41/5.0 will insert a missing trailing backslash
	  before appending the generated filename, but due to this, an empty
	  string results in a file in the root directory
BUGS:	COMPAQ DOS 3.31 hangs if the pathname is at XXXXh:0000h; it apparently
	  wraps around to the end of the segment
	MS-DOS 5.00 revisions A and B and PC-DOS 5.00 revision A reportedly
	  hang the system if the specified path is the root directory and the
	  root directory is full (no free directory entries)
	Mark Incley <mincley@krisalis.demon.co.uk> reports that this function
	  hangs in MS-DOS 6.2x if the name includes two consecutive path
	  separators (e.g. C:\\ )
SeeAlso: AH=3Ch,AH=5Bh