Parallel Port Connector
1 1 1 1
3 2 1 0 9 8 7 6 5 4 3 2 1
┌───────────────────────────────┐
\ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ /
\ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ /
└───────────────────────┘
2 2 2 2 2 2 1 1 1 1 1 1
5 4 3 2 1 0 9 8 7 6 5 4
Pin In/Out Signal Name Pin In/Out Signal Name
─── ────── ──────────── ─── ────── ─────────────
1 I/O -STROBE 14 O -AUTO FEED XT
2 I/O Data Bit 0 15 I -ERROR
3 I/O Data Bit 1 16 O -INIT
4 I/O Data Bit 2 17 O -SLCT IN
5 I/O Data Bit 3 18 na Ground
6 I/O Data Bit 4 19 na Ground
7 I/O Data Bit 5 20 na Ground
8 I/O Data Bit 6 21 na Ground
9 I/O Data Bit 7 22 na Ground
10 I -ACK 23 na Ground
11 I BUSY 24 na Ground
12 I PE 25 na Ground
13 I SLCT
Notes: ■ The signals on pins 10, 11, 12, 13, and 15 are represented at
port n+1 (where n is the printer base port; e.g., at port 379H
on LPT1). See Printer Ports.
■ Original PC/XT/AT Pins 1-9 can carry information in only one
direction -- from the PC to the printer.
■ Bidirectional PS/2 On PS/2s and most printer adaptors built
after 1987, the circuits are designed to handle bidirectional
I/O.
A bidirectional parallel cable is used with the DOS InterLink
utility. See InterLink Cables.
See Also: Cables and Pin Outs
Parallel Ports
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