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The standard IBM parallel/printer port on a 'common or garden' x86 type PCs. Pretty rare these days (most printers connect using a USB port) so it now probably deserves the accolade - Legacy.
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.
|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|
|12||Paper End||Active HIGH|
|14||Auto Line Feed||Active LOW|
|17||Select Input||Active LOW|
|18, 19, 20, 21, 22, 23, 24, 25||Return||Ground|
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