PLIPCONFIG(8)                                       PLIPCONFIG(8)

       plipconfig - fine tune PLIP device parameters

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

       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 hard-
       ware, cable, and the CPU speed of each machine on each end
       of the PLIP link.

       If the single interface argument is given, plipconfig dis-
       plays the status of the given interface only.   Otherwise,
       it will try to set the 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.

       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.



       John    Paul    Morrison,   <>,

                         17 February 1995                       1