Log on to this site and pick up the free download program and you also have the parameters for most machines you might come across.
Another thing to be aware of, is most modern lap tops do not have an RS232 port, just USB, although I have used a USB to RS232 converter for around $20.00.
What I did was to buy an old laptop that was in GWC and load windows 98SE, this allows you to also run DOS programs easily, has a floppy drive, and I can also run my DOS modem programs that allow me to quickly diagnose ports etc without the hastle of waiting for windows to load.
The majority of RS232 cables and machines I have come across that are being used are just three wire with the handshake jumpered out.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.