1*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun# 3*4882a593Smuzhiyun# Parallel Line Internet Protocol (PLIP) network device configuration 4*4882a593Smuzhiyun# 5*4882a593Smuzhiyun 6*4882a593Smuzhiyunconfig PLIP 7*4882a593Smuzhiyun tristate "PLIP (parallel port) support" 8*4882a593Smuzhiyun depends on PARPORT 9*4882a593Smuzhiyun help 10*4882a593Smuzhiyun PLIP (Parallel Line Internet Protocol) is used to create a 11*4882a593Smuzhiyun reasonably fast mini network consisting of two (or, rarely, more) 12*4882a593Smuzhiyun local machines. A PLIP link from a Linux box is a popular means to 13*4882a593Smuzhiyun install a Linux distribution on a machine which doesn't have a 14*4882a593Smuzhiyun CD-ROM drive (a minimal system has to be transferred with floppies 15*4882a593Smuzhiyun first). The kernels on both machines need to have this PLIP option 16*4882a593Smuzhiyun enabled for this to work. 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun The PLIP driver has two modes, mode 0 and mode 1. The parallel 19*4882a593Smuzhiyun ports (the connectors at the computers with 25 holes) are connected 20*4882a593Smuzhiyun with "null printer" or "Turbo Laplink" cables which can transmit 4 21*4882a593Smuzhiyun bits at a time (mode 0) or with special PLIP cables, to be used on 22*4882a593Smuzhiyun bidirectional parallel ports only, which can transmit 8 bits at a 23*4882a593Smuzhiyun time (mode 1); you can find the wiring of these cables in 24*4882a593Smuzhiyun <file:Documentation/networking/plip.rst>. The cables can be up to 25*4882a593Smuzhiyun 15m long. Mode 0 works also if one of the machines runs DOS/Windows 26*4882a593Smuzhiyun and has some PLIP software installed, e.g. the Crynwr PLIP packet 27*4882a593Smuzhiyun driver (<http://oak.oakland.edu/simtel.net/msdos/pktdrvr-pre.html>) 28*4882a593Smuzhiyun and winsock or NCSA's telnet. 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun If you want to use PLIP, say Y and read the PLIP mini-HOWTO as well 31*4882a593Smuzhiyun as the NET-3-HOWTO, both available from 32*4882a593Smuzhiyun <http://www.tldp.org/docs.html#howto>. Note that the PLIP 33*4882a593Smuzhiyun protocol has been changed and this PLIP driver won't work together 34*4882a593Smuzhiyun with the PLIP support in Linux versions 1.0.x. This option enlarges 35*4882a593Smuzhiyun your kernel by about 8 KB. 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun To compile this driver as a module, choose M here. The module 38*4882a593Smuzhiyun will be called plip. If unsure, say Y or M, in case you buy 39*4882a593Smuzhiyun a laptop later. 40