Standard Centronics Compatible Parallel Port DB-25 (All TOSHIBA Portables) PIN Input/Output Signal ------------------------- 1 O Strobe 2 O Data 0 3 O Data 1 4 O Data 2 5 O Data 3 6 O Data 4 7 O Data 5 8 O Data 6 9 O Data 7 10 I Acknowledge 11 I Busy 12 I Paper End 13 I Select 14 O Auto Feed 15 I Error (Fault) 16 O Initialize Printer 17 O Select Input 18-25 Signal Ground