parallel port wiring confusion

[Rob Graves]

Most of the pinouts for various cables I've come accross do not denote
wether the connections are for the parallel port or the parallel port cable
connector.
Is the numbering scheme on a female connector different than a male
connector?
If someone could explain how parallel wiring works that would be great.

Thanks

 

[petrus bitbyter]

"Rob Graves" <evil@dead.org> schreef in bericht
news:F6mdnYPS9IjqqYXdRVn-sw@comcast.com...

Most of the pinouts for various cables I've come accross do not denote
wether the connections are for the parallel port or the parallel port
cable
connector.
Is the numbering scheme on a female connector different than a male
connector?
If someone could explain how parallel wiring works that would be great.

Thanks

Look at:

http://www.beyondlogic.org/

All you ever want to know and much more.

petrus


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[Peter Bennett]

On Wed, 28 Jan 2004 17:13:46 -0500, "Rob Graves" <evil@dead.org>
wrote:

Most of the pinouts for various cables I've come accross do not denote
wether the connections are for the parallel port or the parallel port cable
connector.
Is the numbering scheme on a female connector different than a male
connector?
If someone could explain how parallel wiring works that would be great.

Thanks

The pin numbers on the male and female DB-25 connectors are the same -
when mated, male pin 1 connects to female socket 1 (and the same
applies to any other connector family I've used).

On some _cables_, pin x on one end is not connected to pin x at the
other - in a "Null Modem" serial cable, pin 2 at one end is connected
to pin 3 at the other, and verse visa (and several other connections
are swapped).

If you have a cable with different types of connectors at each end
(like an old PC printer cable, with a DB25 at one end, and a 36way
Centronics at the other), it is fairly unlikely that connections will
be pin-to-pin.



--
Peter Bennett VE7CEI
email: peterbb (at) interchange.ubc.ca
GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html
Newsgroup new user info: http://vancouver-webpages.com/nnq

 

[Rob Graves]

"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:akXRb.28878$hV3.25744@amsnews05.chello.com...

Look at:

http://www.beyondlogic.org/

All you ever want to know and much more.

thank you

 

[Rob Graves]

"Peter Bennett" <peterbb@nowhere.invalid> wrote in message
news:k7gg105r3g0qsd6jg1fnakma51i7890bjf@4ax.com...

On Wed, 28 Jan 2004 17:13:46 -0500, "Rob Graves" <evil@dead.org
wrote:

Most of the pinouts for various cables I've come accross do not denote
wether the connections are for the parallel port or the parallel port
cable
connector.
Is the numbering scheme on a female connector different than a male
connector?
If someone could explain how parallel wiring works that would be great.

Thanks


The pin numbers on the male and female DB-25 connectors are the same -
when mated, male pin 1 connects to female socket 1 (and the same
applies to any other connector family I've used).

On some _cables_, pin x on one end is not connected to pin x at the
other - in a "Null Modem" serial cable, pin 2 at one end is connected
to pin 3 at the other, and verse visa (and several other connections
are swapped).

If you have a cable with different types of connectors at each end
(like an old PC printer cable, with a DB25 at one end, and a 36way
Centronics at the other), it is fairly unlikely that connections will
be pin-to-pin.

Thanks for the description.