Normally the base address of LPT1 will be 0x378 and that of LPT2 will be 0x3F8.
More info: www.pcmag.com/encyclopedia/term/48942/pc-i-o-addressing
Found at: www.google.com/search?q=Which+I%2FO+address+is+used+by+the+LPT2+port%3F
For your reference: www.googleguide.com/