IBM PC/XT, PC/
AT, and
Compatible
Computers
B-3
Cable Pinouts
IBM PC/XT, PC/AT, and
Compatible Computers
The following table shows the suggested pinouts for serial cables for
IBM PC/XT, PC/AT, and compatible computers.
Centronics Parallel
The following table describes the Centronics parallel interface cable
that can be used with your printer. (See “Notes to the Centronics Par-
allel Cable Pinouts Table” on the next page for more information.)
Printer (DB-25S)
IBM PC/XT (DB-25P)
IBM PC/AT
1
1
1 (no connection)
2
3
2
3
4
3
4
5
8
5
4
7
6+8
20
4
7
7
5
20
6+8
1+6
Signal
Pin No.
Return
Pin No.
Signal
Direction
1
19
STROBE-
In
2
20
DATA 1
In
3
21
DATA 2
In
4
22
DATA 3
In
5
23
DATA 4
In
6
24
DATA 5
In
7
25
DATA 6
In
8
26
DATA 7
In
9
27
DATA 8
In
10
28
ACKNLG-
Out
Summary of Contents for 2025
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