Tech Info - IBM Printer Port

The standard IBM parallel/printer port on a 'common or garden' x86 type PCs.

IBM Printer Port Pin-out(DB-25)

The Printer/parallel port uses a standard DB-25 connector. The FEMALE end of this connector (without the bits sticking out) is at the Host/PC. This connector can be, and is, used for all kinds of 'things' so beware and check the pin-out if you are using something exotic.

Apology We incorrectly stated that the host end had the MALE connector - seems we got our MALE and FEMALE mixed up. Put it down to the need for glasses, stupidity or major confusion over the reproductive process as you choose.

DB9 Male

View into Male end

DB25 Pin	Name	Function/Notes
1	Data Strobe	Active LOW
2	Data Bit 1	LSB
3	Data Bit 2	-
4	Data Bit 3	-
5	Data Bit 4	-
6	Data Bit 5	-
7	Data Bit 6	-
8	Data Bit 7	-
9	Data Bit 8	MSB
10	Acknowledge	Active LOW
11	Busy	Active HIGH
12	Paper End	Active HIGH
13	Select	Active High
14	Auto Line Feed	Active LOW
15	Error	Active LOW
16	Initialize Printer	Active LOW
17	Select Input	Active LOW
18, 19, 20, 21, 22, 23, 24, 25	Return	Ground

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Tech Info - IBM Printer Port

IBM Printer Port Pin-out(DB-25)

View into Male end

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