65 lines
2.5 KiB
HTML
65 lines
2.5 KiB
HTML
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<META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
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<TITLE>LINUX PLIP MINI-HOWTO: Hardware required to use PLIP.</TITLE>
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<LINK HREF="PLIP-3.html" REL=next>
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<LINK HREF="PLIP-1.html" REL=previous>
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<H2><A NAME="s2">2. Hardware required to use PLIP.</A></H2>
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<P>The hardware required to set up a PLIP interface is (obviously) a free
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parallel port in both the machines and the cable. If you can configure it
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with your BIOS, set it at least as "bi-directional", but if possible in
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ECP or EPP mode.
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<P>About the cable, this is what is written in the plip.c file, in the kernel
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2.0.33 source:
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<BLOCKQUOTE><CODE>
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<PRE>
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The cable used is a de facto standard parallel null cable -- sold as
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a "LapLink" cable by various places. You'll need a 12-conductor cable to
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make one yourself. The wiring is:
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SLCTIN 17 - 17
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GROUND 25 - 25
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D0->ERROR 2 - 15 15 - 2
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D1->SLCT 3 - 13 13 - 3
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D2->PAPOUT 4 - 12 12 - 4
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D3->ACK 5 - 10 10 - 5
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D4->BUSY 6 - 11 11 - 6
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Do not connect the other pins. They are
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D5,D6,D7 are 7,8,9
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STROBE is 1, FEED is 14, INIT is 16
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extra grounds are 18,19,20,21,22,23,24
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</PRE>
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</CODE></BLOCKQUOTE>
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But I strongly advice you to read the /usr/src/linux/drivers/net/README1.PLIP
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and README2.PLIP files for more info about the cable.
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<P>In my opinion you should avoid building your own parallel null cable. A
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self-made cable may save very little money, but can add lots of headaches.
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If you wish to build your parallel cable, remember that you're doing it at
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your own risk, I reported exactly what is written in plip.c but I don't give
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warranties.
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<P>A final word about cable length: long cables (i.e. more than 10 feet or
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3 meters) may bring problems due to radio interference. If you need long
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cables you should use good and well shielded cables, but very long cables
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are not recommended: I think the maximal cable lenght should be 15 meters
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(50 feet).
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<P>Anyway, someone mailed me that his/her 100 feet (30 meters) cable works
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fine; if someone really wants to try a PLIP connection between the
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office and his/her home (200 meters away), and has the money to spend,
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can try it, but is at his/her risk.
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<P>
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