In the Windows Start menu, choose Settings then Control Panel. Double-click on the System icon. Select the tab Device Manager. Double-click on Ports (COM&LPT1) then on Printer Port (LPT1). Finally, select the tab Resources.

Notice the first Input / Output Range. You will find for example: 0378-037F. The address is, here, 378 in hexadecimal, or 888 in decimal. It is easy to convert the values in hexadecimal and in decimal using the Windows Calculator (sub-menu Accessories of the Start menu).