Newsgroups: comp.sys.cbm
Path: utzoo!utgpu!watserv1!maytag!xenitec!geoffw
From: geoffw@xenitec.on.ca (Geoffrey Welsh)
Subject: Re: 9600 baud on the commodore
Reply-To: root@zswamp.fidonet.org (Geoffrey Welsh)
Organization: XeniTec Consulting Services, Kitchener, ON, Canada
Date: Tue, 18 Sep 90 23:12:57 GMT
Message-ID: <1990Sep18.231257.15897@xenitec.on.ca>
References: <418@news.nd.edu> <1990Sep15.171530.12692@xenitec.on.ca> <436@news.nd.edu>

Before I begin: please user RETURN every 60 or 70 characters.

In article <436@news.nd.edu> treesh@bach.helios.nd.edu writes:
>The term program that is packaged with this siftlink is Desterm
>as I understand it.  My question is, can I connect with another
>commodre user running DesTerm with Swiftlink and up/download
>with punter/xmodem at 9600 bps with a 9600 baud modem such as
>the USR HST?

   You don't even need a SwiftLink to operate a USRobotics Courier HST.
DesTerm will run it at 9600 bps on a plain Commodore 128.
However, with a SwiftLink, you'll be able to run the HST at 19,200
bps or even 38,400 bps. I should include comments about the limitations
of the HST's throughput, but that's beyond the scope of this
message.

   C1 (AKA 'new Punter') protocol will not work over an HST. However,
XMODEM and its derivatives will. You should find throughput best
under XMODEM-1K or YMODEM; the top end is near 850 CPS, at 9600 bps
(higher at 19,200 or 38,400) though the
speed of the drive you're using is a major factor. REU is best.

>Is it worth it?  Even with a hard disk drive such as the Lt Kernal,
>the system has to stop and write/read blocks ever 4 packettes,

   Does it? Is there anything to stop us from writing to disk every
8 packets?

   You do have a point: disk access will be the limiting factor. That's
why I suggested the REU. Current versions of DesTerm are NOT compatible
with the Xetec Lt. Kernal, so that option is moot.

>At the current time, my BBS (Cnet 128 v 4.0) software is pusing
>about 180 cps MAX using xmodem 1k protocol at 2400 connect.

   Downloading to REU via a null modem at 2400 bps, DesTerm 2.0
got 230 CPS... WITHOUT the SwiftLink.

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