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Linux 2.6 - man page for plipconfig (linux section 8)

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PLIPCONFIG(8)									    PLIPCONFIG(8)

NAME
       plipconfig - fine tune PLIP device parameters

SYNOPSIS
       plipconfig interface
       plipconfig interface [nibble NN] [trigger NN] [unit NN]

DESCRIPTION
       Plipconfig  is used to (hopefully) improve PLIP performance by changing the default timing
       parameters used by the PLIP protocol. Results are dependent on the parallel port hardware,
       cable, and the CPU speed of each machine on each end of the PLIP link.

       If  the	single	interface  argument is given, plipconfig displays the status of the given
       interface only.	Otherwise, it will try to set the options.

OPTIONS
       nibble NN
	      Sets the nibble wait value in microseconds. Default is 3000.

       trigger NN
	      Sets the trigger wait value in microseconds. Default is 500.

       PLIP speed can in some cases be improved by lowering the default values.  Values which are
       too  low  may  cause  excess  use of CPU, poor interrupt response time resulting in serial
       ports dropping characters, or in dropping of PLIP packets. Changing the plip MTU can  also
       affect PLIP speed.

NOTE
       If  you	get  no  response  it  is far more likely the irq is wrong and needs setting with
       ifconfig. The few cases where the default parameters will be too fast are those using very
       long  cables.  Something  you  should  never  do  as the parallel port is not specified or
       designed for driving long cable runs.

SEE ALSO
       ifconfig(8)

BUGS
       Non.

AUTHOR
       John Paul Morrison, <jmorriso@bogomips.ee.ubc.ca>, <ve7jpm@ve7jpm.ampr.org>

					 17 February 1995			    PLIPCONFIG(8)
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