plipconfig
fine tune PLIP device parameters
see also :
ifconfig
Synopsis
plipconfig
interface
plipconfig interface [nibble NN] [trigger NN] [unit
NN]
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examples
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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.
bugs
Non.
see also
ifconfig
author
John Paul
Morrison, <jmorriso[:at:]bogomips.ee.ubc[:dot:]ca>,
<ve7jpm[:at:]ve7jpm.ampr[:dot:]org>