How do you tell which is/are available on a particular PC?
Go into the bios at bootup.
Many people believe that if they get a 1284 port with EPP or ECP that they will automatically get the benefit of faster printing. Unfortunately, this is not true.
In order to get faster printing three things must be present:
1- the parallel port must be capable of operating in the ECP mode,
2- there must be a port driver present that knows HOW to operate in the mode, and most important,
3- the printer (or peripheral) must be designed to operate in this mode.
Not all printers, and actually only a few of the newer ones, can operate in one of these advanced modes.