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21
LPT
The onboard parallel port is a 25-pin female connector, marked as “LPT.”
Pin
Signal
Pin
Signal
Pin 1 Strobe
Pin 14 Auto feed
Pin 2 Data bit 0
Pin 15 Error
Pin 3 Data bit 1
Pin 16 Init
Pin 4 Data bit 2
Pin 17 SLCT in
Pin 5 Data bit 3
Pin 18 Ground
Pin 6 Data bit 4
Pin 19 Ground
Pin 7 Data bit 5
Pin 20 Ground
Pin 8 Data bit 6
Pin 21 Ground
Pin 9 Data bit 7
Pin 22 Ground
Pin 10 ACK
Pin 23 Ground
Pin 11 Busy
Pin 24 Ground
Pin 12 PE
Pin 25 Ground
Pin 13 SLCT
LPT