0:408h                   Parallel Printer Port Base Addresses
 
 Length: 8 bytes
 
    Base addresses for four parallel printer ports. If a port address is
    0, then that port is not used.
 
                    0:408h - Parallel Printer Port #1 (LPT1)
                    0:40Ah - Parallel Printer Port #2 (LPT2)
                    0:40Ch - Parallel Printer Port #3 (LPT3)
                    0:40Eh - Parallel Printer Port #4 (LPT4)

Seealso:


 INT 17h, 01h