Int 21 Fn 5FA9 - Lantastic V4.1+ - Set Extended Queue Entry [N]
AX = 5FA9h
BX = handle of opened queue entry
DS:SI -> queue entry (see #1421)
Return: CF clear if successful
CF set on error
AX = error code
Note: functions exactly the same as AX=5FA1h except the spooled filename is
also set. This call supports direct despooling.
See Also: AX=5FA1h