INT 16 U - PCIBM PC Tools v6.0-8.0 DESKTOP - ???
	AX = FFA8h
	DS:SI -> three consecutive 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. strings for ??? (max 256 bytes total)
	???
Return: ???
Notes:	available only when popped up
	strings copied into internal buffer, among other actions