Thanks for the replies. My idiocy on the cord hook-up.
If the 15-prong jacks are outputs though, is there a way to go from the (Windows 98 laptop) output to the (Vista laptop) input? The Vista machine is a laptop, please note, I do not have a separate monitor. I also have an XP laptop I could use if necessary. Again, I can use the keystrokes on the output machine but - obviously - if the monitor is not working I cannot see the effects of the keystrokes. Maybe it's hopeless but this seems a good geek challenge!
Thanks for any more input.