Re: [TUHS] Help request: uucp, mail on 4.2BSD

Warren Toomey <wkt(a)tuhs.org> wrote: In case it is if interest... I used modems between 1986 and january 1993 (when I started to use a self built ISDN adaptor that was connected as a piggy back to the Sun-3/50 or Sun-3/60 EPROM socket). During that "modem" time, I started with a 2400 baud modem and soon upgraded to a US-Robotics modem. It turned out that UUCP had several issues and was not very effective with high speed modems. For this reason, I started with the BSD-4.2 UUCP sources and created a new protocol that I called "s" protocol. This protocol was based on the "g" protocol but used larger packet sizes. Here is my comment header for "sio.c": /* * High speed modem protocol with flow control. * * The s protocol was designed to be used with high speed modems which * have no built in protocol spoofing for the g protocol. * * The s protocol is almost the g protocol with a greater packetsize * and some mapping, to allow software flow control to work. * If the operating system is able to do hardware/software flow control * which is not 8-bit transparent, the s protocol will use the * 8-bit data path. If the data path is only 7-bit wide on one or both * directions the s protocol will use additional mapping in the * appropriate direction to ensure an overall 8-bit wide datapath. * * The s protocol relies on a packet driver with some minor changes. * * The modifications on the packet driver are: * - some minor bug-fixes, so packet sizes > 128 bytes will work. * - allow to specify transport routines different from read/write * to enable the mapping of flow control characters. * * These changes will not stop the g protocol to work. * * Author: * J. Schilling, Berlin 1990 * * N.B.: The main code was stolen from the g-protocol. */ Jörg -- EMail:joerg@schily.net (home) Jörg Schilling D-13353 Berlin joerg.schilling(a)fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/