INT 16 U - PCIBM PC Tools v5.1-8.0 DESKTOP - SAFE CREATE FILE
	AX = FFD8h
	DS:BX -> 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. filename
Return: BX = file handle
	    0000h on error
Note:	pops up confirmation menu if file already exists
	only available when popped up???