Path: utzoo!mnetor!uunet!husc6!mailrus!ames!pasteur!ucbvax!POMONA.BITNET!7GMADISO
From: 7GMADISO@POMONA.BITNET
Newsgroups: comp.sys.misc
Subject: Re: Error-Checking Xfer Protocols
Message-ID: <8803022236.AA25500@ucbvax.Berkeley.EDU>
Date: 2 Mar 88 21:40:57 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 33

Date: 2 March 1988, 13:30:08 PST
From: 7GMADISO at POMONA
To:   INFO-MICRO at SIMTEL20

No, I never have called an Opus or a Fido, except possibly when I first
got my modem.  Of course, there's the fact that it's my understanding
that most of those run on Mess-DOS machines, and since I use a Tandy Model
4, there is very little of any interest on that sort of system.  I primarily
get my PD s/ware from GEnie and my user's group; I use local BBSes mainly
for discussions and 'social' BBSing.  As it happens, that means I am mostly
using Oracomm BBSes (the best BBS software I've ever seen anywhere) which
run on Mess-DOS machines, and whatever BBS software is running on 2 Apple
II based BBSes near my home that I use.

My original post was in error; there is ONE board I call that has SEAlink,
etc., and it uses software from a company called SSE; I can't remember the
name of it right at the moment.  If GEnie has anything above the level of
CRC Xmodem, they aren't telling anyone.  That's all I've been able to find
on the system.  PLink advocates the use of WXmodem, but not, unfortunately,
to the point of providing C source; the only examples I can find are in
BASIC and Turbo Pascal.  I can comprehend the BASIC, but it doesn't tend
to translate well to C, and Pascal can just take a flying leap as far as
I'm concerned.  So, I still would like to see some source code for WXmodem.

Part of the beauty of the Xmodem standard is that it's a compact, simple
standard that can be implemented on virtually anything (and it has been).
Any number of these 'new' protocols (SEAlink, Zmodem, etc...) are available
only on Mess-DOS machines, and are a pain to implement, if not impossible
because of memory constraints on 8-bit machines.  WXmodem gives significantly
better performance than 'vanilla' Xmodem, while retaining the comparative
compactness of implementation, though it is somewhat more complex.

                      ---- George Madison